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Sample records for ac26-07nt42677 rpsea fe

  1. NETL F 451.1/1-1, Categorical Exclusion Designation Form

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    DE-AC26-07NT42677 RPSEA Houston, TX Argen Polymer, LLC: The Woodlands, TX (CX only applies to this sub-recipient) FE/TDIC/OG/UOG Team Dave Cercone Deepwater Permanent Subsea Pressure Compensated Chemical Reservoir Construction Chemical compatibility testing for polymer materials; testing will be executed by Argen Polymer LLC. DAVID CERCONE Digitally signed by DAVID CERCONE DN: c=US, o=U.S. Government, ou=Department of Energy, cn=DAVID CERCONE, 0.9.2342.19200300.100.1.1=89001003105174 Date:

  2. NETL F 451.1/1-1, Categorical Exclusion Designation Form

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AC26-07NT42677 RPSEA Niskayuna, NY GE Global Research Center - Niskayuna, NY FE/TDIC/OG/UOG Team Gary Covatch Subsea High Voltage Direct Current Connectors for Environmentally Safe and Relia Task 10 added: Perform fundamental materials study on the long-term behavior of DC insulation under operating conditions for a subsea DC connector. GARY COVATCH Digitally signed by GARY COVATCH DN: c=US, o=U.S. Government, ou=Department of Energy, cn=GARY COVATCH, 0.9.2342.19200300.100.1.1=89001000563971

  3. Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources

    SciTech Connect (OSTI)

    Russell E. Fray

    2007-05-31

    RPSEA is currently in its first year of performance under contract DE-AC26-07NT42677, Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Program Administration. Significant progress has been made in establishing the program administration policies, procedures, and strategic foundation for future research awards. RPSEA has concluded an industry-wide collaborative effort to identify focus areas for research awards under this program. This effort is summarized in the RPSEA Draft Annual Plan, which is currently under review by committees established by the Secretary of Energy.

  4. Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources

    SciTech Connect (OSTI)

    Russell E. Fray

    2007-06-30

    RPSEA is currently in its first year of performance under contract DE-AC26-07NT42677, Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Program Administration. Progress continues to be made in establishing the program administration policies, procedures, and strategic foundation for future research awards. Significant progress was made in development of the draft program solicitations. In addition, RPSEA personnel continued an aggressive program of outreach to engage the industry and ensure wide industry participation in the research award solicitation process.

  5. RPSEA REPORT PROCEDURES

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    RPSEA Final Technical Report 08121.2201.02.FINAL Heavy Viscous Oil Pressure, Volume, and Temperature 08121-2201-02 February 4, 2015 Hongying Zhao Project Manager, PhD, PEng...

  6. RPSEA REPORT PROCEDURES

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    RPSEA Final Technical Report 08121.2201.02.FINAL Heavy Viscous Oil Pressure, Volume, and Temperature 08121-2201-02 February 4, 2015 Hongying Zhao Project Manager, PhD, PEng Schlumberger, DBR Technology Center 9450, 17 Avenue NW, Edmonton, T6N 1M9, Canada (On behalf of Schlumberger Technology Corporation, 333 Clay Street, Suite 1900, Houston, TX, 77002, USA) 2 LEGAL NOTICE This report was prepared by Schlumberger Technology Corporation as an account of work sponsored by the Research Partnership

  7. rpsea | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    programmatic research and development activities pertaining to the Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Program. In May 2006, RPSEA was...

  8. Research Partnership to Secure Energy for America RPSEA | Open...

    Open Energy Info (EERE)

    Partnership to Secure Energy for America RPSEA Jump to: navigation, search Name: Research Partnership to Secure Energy for America (RPSEA) Place: Sugar Land, TX, Texas Zip: 77478...

  9. 42677RPSEA | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Energy for America (RPSEA), Sugar Land, TX 77478 Background In August 2005, President Bush signed the Energy Policy Act (EPAct) (the first national energy plan in more than a...

  10. RPSEA Final Report

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... 1 Figure 2 Crossplot of permeability vs. porosity of the Arbuckle dolomite core samples from Ogallah unit...

  11. Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    International science conferences in Santa Fe June 22, 2012 Focus on insulating materials and radiation effects in solids LOS ALAMOS, New Mexico, June 22, 2012-Los Alamos National...

  12. Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    International science conferences in Santa Fe June 22, 2012 Focus on insulating materials and radiation effects in solids LOS ALAMOS, New Mexico, June 22, 2012-Los Alamos National Laboratory together with New Mexico Consortium, Los Alamos National Bank and Netzsch Group are sponsoring two international conferences in Santa Fe. Organizers anticipate the arrival of more than 300 scientists from around the world. What: * The 2012 International Conference on Defects in Insulating Materials is the

  13. miniFE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    miniFE miniFE Description FE is a Finite Element mini-application which implements a couple of kernels representative of implicit finite-element applications. It assembles a sparse...

  14. Getting to Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Getting to Santa Fe Getting to Santa Fe Find quick links on hotel and transportation information. Explore the surrounding area while you visit Santa Fe. Institute Administrator Caryll Blount Institute for Materials Science (505) 665-3950 Email La Fonda La Fonda on the Plaza 100 E. San Francisco St. Santa Fe, NM 87501 General phone numbers: 1-505-982-5511 1-800-523-5002 Concierge (Rebekah): concierge@lafondasantafe.com Additional Travel Information Santa Fe Travel site: This site provides you

  15. FinalTechnicalReport_15U5O2I-11_RPSEA.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    depth in the GOM: 1. Paired Column (PC) semi-submersible developed by Houston Offshore Engineering (HOE) 2. Deepwater Dry Tree Semi-submersible (DWDTS) developed by Kvaerner...

  16. Fe(A)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    many important materials. Using a combination of surface science techniques a novel adsorption behavior for water is demonstrated to occur at the (001) surface of magnetite (Fe 3...

  17. miniFE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    miniFE miniFE Description FE is a Finite Element mini-application which implements a couple of kernels representative of implicit finite-element applications. It assembles a sparse linear-system from the steady-state conduction equation on a brick-shaped problem domain of linear 8-node hex elements. It then solves the linear-system using a simple un-preconditioned conjugate-gradient algorithm. Thus the kernels that it contains are: computation of element-operators (diffusion matrix, source

  18. Getting to Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    with Road Runner for 65 + tax they will also take two passengers The Capital City Cab (Santa Fe taxi company) - 50 each way. Reservation not required Hertz car rental (LANL...

  19. Biomimetic model for [FeFe]-hydrogenase: Asymmetrically disubstituted...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Biomimetic model for FeFe-hydrogenase: Asymmetrically disubstituted diiron complex with a redox-active 2,2'-bipyridyl ligand Authors: Roy, S., Groy, T., Jones, A.K. Title:...

  20. NETL F 451.1/1-1, Categorical Exclusion Designation Form

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    10121-4302-01 RPSEA Sugar Land, TX Letton Hall Group LLC - Houston, TX, Harris County, TX (sub-contractor); Innoveering LLC - Ronkonkoma, Suffolk, NY (sub to LHG). RPSEA (prime) and LHG (sub) previously approved. Approval is for Innoveering LLC project changes. FE/TDIC/OG/NG Team Bill Fincham More Improvements to Deepwater Subsea Measurement Fab HPHT DP units with new seal for oil-fill ports and their performance verified at 15k psi w/HPHT absolute pressure (P) sensor. Innoveering to modify DP

  1. Santa Fe, NM 87506

    Office of Environmental Management (EM)

    July 31, 2014 Ms. Kimberly Davis Lebak Manager Los Alamos Field Office 3747 West Jemez Road, MS A316 Los Alamos, NM 87544 Mr. Pete Maggiore Assistant Manager for Environmental Operations 3747 West Jemez Road, MS A316 Los Alamos, NM 87544 Dear Ms. Lebak and Mr. Maggiore, I am pleased to enclose Recommendation 2014-02, unanimously approved by the Northern New Mexico Citizens' Advisory Board at its July 30 th meeting in Santa Fe. Please call Lee Bishop, DDFO or Menice Santistevan, Executive

  2. Santa Fe Jets and Heavy Flavor Workshop

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Santa Fe Jets and Heavy Flavor Workshop Santa Fe Jets and Heavy Flavor Workshop WHEN: Jan 11, 2016 8:30 AM - Jan 13, 2016 5:30 PM WHERE: Inn and Spa at Loretto 211 Old Santa Fe...

  3. FE Clean Energy Group | Open Energy Information

    Open Energy Info (EERE)

    FE Clean Energy Group Jump to: navigation, search Name: FE Clean Energy Group Place: Darien, Connecticut Zip: 6820 Sector: Efficiency Product: A Private Equity Fund Manager which...

  4. FE Categorical Exclusions | Department of Energy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    FE Categorical Exclusions FE Categorical Exclusions RSS June 4, 2014 CX-011993: Categorical Exclusion Determination Cheniere Marketing, LLC CX(s) Applied: B5.7 Date: 06042014...

  5. Photoionization of FE3+ Ions

    SciTech Connect (OSTI)

    Ovchinnikov, O.; Schlachter, F.

    2003-01-01

    Photoionization of Fe3+ ions was studied for the first time using synchrotron radiation from the Advanced Light Source (ALS) and the merged-beams technique. Fe3+ ions were successfully produced using ferrocene in an electron cyclotron resonance ion source (ECR). The measured yield of Fe4+ photoions as a function of photon energy revealed the presence of resonances that correspond to excitation of autoionizing states. These resonances are superimposed upon the photoion yield produced by direct photoionization, which is a smooth, slowly decreasing function of energy. The spectra for the photoionization of Fe3+ will be analyzed and compared with theory. The data collected will also serve to test models for the propagation of light through ionized matter.

  6. FE Blog | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    with senior executives in the Office of Fossil Energy (FE). In this edition we talk to Paula Gant, Deputy Secretary for Oil and Gas August 17, 2015 Profiles in Leadership:...

  7. FE Blog | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    implement the change. August 5, 2014 FE's Christopher Smith spoke recently during the Africa Leaders' Visit: Energy event in Houston. During the three-day event organized by the...

  8. Microsoft Word - FeMoco.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fig. 1. Fourier transforms calculated over the k-range 2-16 Å -1 of EXAFS data (dotted) and fits (solid) from (left) MoFe protein- bound FeMoco and (right) the NifEN-bound FeMoco precursor. The EXAFS data were obtained, respectively, by subtraction of ΔnifB MoFe protein EXAFS from wild-type MoFe protein EXAFS and ΔnifB NifEN EXAFS from NifEN EXAFS. The insets show the structure of FeMoco (left) and a structural model consistent with the XAS analysis of the NifEN-bound FeMoco precursor

  9. Microsoft Word - FeV.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fe K-edge XAS spectra of the Fe(III)-azide precursor (black) and the Fe(V)-nitrido complex (red) Characterization of a Genuine S=1/2 Fe(V) Complex Núria Aliaga-Alcalde, 1 Serena DeBeer George, 2 Bernd Mienert, 1 Eckhard Bill, 1 Karl Wieghardt 1 and Frank Neese 11 1 Max Planck Institut für Bioanorganische Chemie, Mülheim an der Ruhr, Germany 2 Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, CA High-valent Fe(IV) and Fe(V) intermediates are invoked in the

  10. URTAC Meeting - January 2008 | Department of Energy

    Energy Savers [EERE]

    Section 999 Timeline 2008 - 2010 URTAC Member Appointment Process DOENETL Oil & Gas Program Overview RPSEA Unconventional Onshore and Small Producers Program RPSEA...

  11. NNMCAB Board Minutes: September 2006 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the September 27, 2006 Board meeting at Santa Fe Community College Presentation LANL, Transuranic Waste Program, Lee Lucero

  12. NNMCAB Board Minutes: June 2001 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the June 20, 2001 Board meeting at Hotel Santa Fe Presentation NNMCAB Waste Management Committee

  13. NNMCAB Board Minutes: November 2010 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the November 17, 2010 Board meeting at Lodge at Santa Fe Presentation LANL, Environmental Surveillance Report for 2009

  14. NNMCAB Board Minutes: January 2006 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the January 25, 2006 Board meeting at Santa Fe Community College Presentation LANL, Groundwater Issues

  15. Process and genes for expression and overexpression of active [FeFe] hydrogenases

    DOE Patents [OSTI]

    Seibert, Michael; King, Paul W; Ghirardi, Maria Lucia; Posewitz, Matthew C; Smolinski, Sharon L

    2014-09-16

    A process for expression of active [FeFe]-hydrogenase in a host organism that does not contain either the structural gene(s) for [FeFe]-hydrogenases and/or homologues for the maturation genes HydE, HydF and HyG, comprising: cloning the structural hydrogenase gene(s) and/or the maturation genes HydE, HydF and HydG from an organisms that contains these genes into expression plasmids; transferring the plasmids into an organism that lacks a native [FeFe]-hydrogenase or that has a disrupted [FeFe]-hydrogenase and culturing it aerobically; and inducing anaerobiosis to provide [FeFe] hydrogenase biosynthesis and H?2#191 production.

  16. Microsoft Word - FeSCs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Schematic of the band structure along the high symmetry direction of Γ-M showing the (left) unrenormalized case, (middle) orbital-selective renormalized case at low temperatures, and (right) orbital-selective Mott phase where the d xy orbital completely loses coherence in the high temperature phase. Strong Orbital-selective Correlation Effects Unite Iron Chalcogenide Superconductors Seven years ago when superconductivity was first discovered in the iron-based compounds (FeSCs), one of the very

  17. Radiation effects on interface reactions of U/Fe, U/(Fe+Cr), and U/(Fe+Cr+Ni)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Shao, Lin; Chen, Di; Wei, Chaochen; Martin, Michael S.; Wang, Xuemei; Park, Youngjoo; Dein, Ed; Coffey, Kevin R.; Sohn, Yongho; Sencer, Bulent H.; et al

    2014-10-01

    We study the effects of radiation damage on interdiffusion and intermetallic phase formation at the interfaces of U/Fe, U/(Fe + Cr), and U/(Fe + Cr + Ni) diffusion couples. Magnetron sputtering is used to deposit thin films of Fe, Fe + Cr, or Fe + Cr + Ni on U substrates to form the diffusion couples. One set of samples are thermally annealed under high vacuum at 450 C or 550 C for one hour. A second set of samples are annealed identically but with concurrent 3.5 MeV Fe++ ion irradiation. The Fe++ ion penetration depth is sufficient to reachmore »the original interfaces. Rutherford backscattering spectrometry analysis with high fidelity spectral simulations is used to obtain interdiffusion profiles, which are used to examine differences in U diffusion and intermetallic phase formation at the buried interfaces. For all three diffusion systems, Fe++ ion irradiations enhance U diffusion. Furthermore, the irradiations accelerate the formation of intermetallic phases. In U/Fe couples, for example, the unirradiated samples show typical interdiffusion governed by Fick’s laws, while the irradiated ones show step-like profiles influenced by Gibbs phase rules.« less

  18. Radiation effects on interface reactions of U/Fe, U/(Fe+Cr), and U/(Fe+Cr+Ni)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Shao, Lin; Chen, Di; Wei, Chaochen; Martin, Michael S.; Wang, Xuemei; Park, Youngjoo; Dein, Ed; Coffey, Kevin R.; Sohn, Yongho; Sencer, Bulent H.; et al

    2014-10-01

    We study the effects of radiation damage on interdiffusion and intermetallic phase formation at the interfaces of U/Fe, U/(Fe + Cr), and U/(Fe + Cr + Ni) diffusion couples. Magnetron sputtering is used to deposit thin films of Fe, Fe + Cr, or Fe + Cr + Ni on U substrates to form the diffusion couples. One set of samples are thermally annealed under high vacuum at 450 C or 550 C for one hour. A second set of samples are annealed identically but with concurrent 3.5 MeV Fe++ ion irradiation. The Fe++ ion penetration depth is sufficient to reachmore » the original interfaces. Rutherford backscattering spectrometry analysis with high fidelity spectral simulations is used to obtain interdiffusion profiles, which are used to examine differences in U diffusion and intermetallic phase formation at the buried interfaces. For all three diffusion systems, Fe++ ion irradiations enhance U diffusion. Furthermore, the irradiations accelerate the formation of intermetallic phases. In U/Fe couples, for example, the unirradiated samples show typical interdiffusion governed by Fick’s laws, while the irradiated ones show step-like profiles influenced by Gibbs phase rules.« less

  19. Radiation effects on interface reactions of U/Fe, U/(Fe+Cr), and U/(Fe+Cr+Ni)

    SciTech Connect (OSTI)

    Shao, Lin; Chen, Di; Wei, Chaochen; Martin, Michael S.; Wang, Xuemei; Park, Youngjoo; Dein, Ed; Coffey, Kevin R.; Sohn, Yongho; Sencer, Bulent H.; Rory Kennedy, J.

    2014-10-01

    We study the effects of radiation damage on interdiffusion and intermetallic phase formation at the interfaces of U/Fe, U/(Fe + Cr), and U/(Fe + Cr + Ni) diffusion couples. Magnetron sputtering is used to deposit thin films of Fe, Fe + Cr, or Fe + Cr + Ni on U substrates to form the diffusion couples. One set of samples are thermally annealed under high vacuum at 450 C or 550 C for one hour. A second set of samples are annealed identically but with concurrent 3.5 MeV Fe++ ion irradiation. The Fe++ ion penetration depth is sufficient to reach the original interfaces. Rutherford backscattering spectrometry analysis with high fidelity spectral simulations is used to obtain interdiffusion profiles, which are used to examine differences in U diffusion and intermetallic phase formation at the buried interfaces. For all three diffusion systems, Fe++ ion irradiations enhance U diffusion. Furthermore, the irradiations accelerate the formation of intermetallic phases. In U/Fe couples, for example, the unirradiated samples show typical interdiffusion governed by Ficks laws, while the irradiated ones show step-like profiles influenced by Gibbs phase rules.

  20. Fe-based long range ordered alloys

    DOE Patents [OSTI]

    Liu, C.T.

    Malleable long range ordered alloys with high critical ordering temperatures exist in the V(Co,Fe)/sub 3/ and V(Co,Fe,Ni)/sub 3/ system. The composition comprising by weight 22 to 23% V, 35 to 50% Fe, 0 to 22% Co and 19 to 40% Ni with an electron density no greater than 8.00. Excellent high temperature properties occur in alloys having compositions comprising by weight 22 to 23% V, 35 to 45% Fe, 0 to 10% Co, 25 to 35% Ni; 22 to 23% V, 28 to 33% Ni and the remainder Fe; and 22 to 23% V, 19 to 22% Co and the remainder Fe. The alloys are fabricable by casting, deforming and annealing for sufficient time to provide ordered structure.

  1. Fe-based long range ordered alloys

    DOE Patents [OSTI]

    Liu, Chain T; Inouye, Henry; Schaffhauser, Anthony C.

    1980-01-01

    Malleable long range ordered alloys having high critical ordering temperatures exist in the V(Co,Fe).sub.3 and V(Co,Fe,Ni).sub.3 system having the composition comprising by weight 22-23% V, 35-50% Fe, 0-22% Co and 19-40% Ni with an electron density no greater than 8.00. Excellent high temperature properties occur in alloys having compositions comprising by weight 22-23% V, 35-45% Fe, 0-10% Co, 25-35% Ni; 22-23% V, 28-33% Ni and the remainder Fe; and 22-23% V, 19-22% Ni, 19-22% Co and the remainder Fe. The alloys are fabricable by casting, deforming and annealing for sufficient time to provide ordered structure.

  2. FE Blog | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Blog FE Blog RSS January 7, 2016 Carbon capture is an important part of the Energy Department's Fossil Energy research and development efforts, but it can be hard to understand. This infographic breaks it down for you. | Infographic by <a href="/node/1332956">Carly Wilkins</a>, Energy Department. INFOGRAPHIC: Carbon Capture 101 Carbon capture is an important part of the Energy Department's Fossil Energy research and development efforts, but how does it work? This

  3. Phase relations in the Fe-FeSi system at high pressures and temperatur...

    Office of Scientific and Technical Information (OSTI)

    We determined melting temperatures and subsolidus phase relations of Fe-9 wt% Si and ... We find the B2 crystal structure in Fe-9Si where previous studies reported the less ...

  4. High-pressure viscosity of liquid Fe and FeS revisited by falling...

    Office of Scientific and Technical Information (OSTI)

    Title: High-pressure viscosity of liquid Fe and FeS revisited by falling sphere viscometry using ultrafast X-ray imaging Authors: Kono, Yoshio ; Kenney-Benson, Curtis ; Shibazaki, ...

  5. Equations of state in the Fe-FeSi system at high pressures and...

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Search Results Journal Article: Equations of state in the Fe-FeSi system at high pressures and temperatures Citation Details In-Document Search Title: Equations of ...

  6. Identification of Highly Active Fe Sites in (Ni,Fe)OOH for Electrocata...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of site specific OER overpotentials using DFT+U reveals the origin of enhanced OER activity in Fe-doped -NiOOH, in which Fe sites have near-optimum binding energies for...

  7. FE0023592 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Email Page email Print This Page print Performer: Research Triangle Institute fe0023592-image.jpg Block Flow Diagram of Hybrid Integrated CTL Process Website: Research Triangle...

  8. fe0013689-WVU | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Assessing Fugitive Methane Emissions Using Natural Gas Engines in Unconventional Resource Development Last Reviewed 1212015 DE-FE0013689 Goal The project goal is to create an...

  9. fe0013919-UTAustin | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    METHANE HYDRATE PROJECTS Mechanisms for Methane Transport and Hydrate Accumulation in Coarse-Grained Reservoirs Last Reviewed 11242015 DE-FE0013919 Goal The project goal is to...

  10. fe0013590-PSU | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Continuous, Regional Methane Emissions Estimates in Northern Pennsylvania Gas Fields Using Atmospheric Inversions Last Reviewed 11302015 DE-FE0013590 Goal The goal of this...

  11. fe0013999-MIT | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fate of Methane Emitted From Dissociating Marine Hydrates: Modeling, Laboratory, and Field Constraints Last Reviewed 1222015 DE-FE0013999 Goal The overall goals of this research...

  12. Fe-V redox flow batteries

    DOE Patents [OSTI]

    Li, Liyu; Kim, Soowhan; Yang, Zhenguo; Wang, Wei; Zhang, Jianlu; Chen, Baowei; Nie, Zimin; Xia, Guanguang

    2014-07-08

    A redox flow battery having a supporting solution that includes Cl.sup.- anions is characterized by an anolyte having V.sup.2+ and V.sup.3+ in the supporting solution, a catholyte having Fe.sup.2+ and Fe.sup.3+ in the supporting solution, and a membrane separating the anolyte and the catholyte. The anolyte and catholyte can have V cations and Fe cations, respectively, or the anolyte and catholyte can each contain both V and Fe cations in a mixture. Furthermore, the supporting solution can contain a mixture of SO.sub.4.sup.2- and Cl.sup.- anions.

  13. Santa Fe Community College selects new president

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Santa Fe Community College Selects New President Community Connections: Your link to news and opportunities from Los Alamos National Laboratory Latest Issue: Dec. 2015-Jan. 2016...

  14. International science conferences in Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    in Santa Fe The conference are 2012 International Conference on Defects in Insulating Materials and Computer Simulation of Radiation Effects in Solids. June 22, 2012 Los Alamos...

  15. NNMCAB Board Minutes: January 2008 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the January 30, 2008 Board meeting at Santa Fe Community College Presentation DOE, Quarterly Progress Review and Budget Update on Environmental Programs at LANL, David Gregory

  16. NNMCAB Board Minutes: March 2008 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the March 26, 2008 Board meeting at Santa Fe Community College Presentations LANL, How Does LANL Conduce Risk Assessment, Rich Mirenda

  17. NNMCAB Board Minutes: July 2006 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the July 26, 2006 Board meeting at Santa Fe Community College Consideration and Action on Recommendation 2006-05 and 2006-07

  18. NNMCAB Board Agenda: December 2014 Santa Fe

    Broader source: Energy.gov [DOE]

    Agenda for the December 10, 2014 Special Board meeting at Lodge at Santa Fe Presentation DOE, Transition EM Legacy Clean-up at Los Alamos, Jack Craig

  19. fe0024271-utaustin | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fracture Diagnostics Using Low Frequency Electromagnetic Induction and Electrically Conductive Proppants Last Reviewed 12415 DE-FE0024271 Goal The project goal is to develop a...

  20. Microsoft Word - Fe-S_Clusters

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2010 Figure 1. Top: overall ribbon and surface representation of the x-ray crystal structure of [FeFe]-hydrogenase HydA ΔEFG . Loop regions important for the cluster insertion process are colored green. Bottom: Ball and stick representation of the active site of HydA ΔEFG at which a [4Fe-4S] cluster is present. Coloring scheme: rust, iron; orange, sulfur; gray, carbon; red, oxygen; blue, nitrogen. Assembly and Evolution of Complex Fe-S Clusters as Revealed by X-ray Crystallography

  1. NNMCAB Board Minutes: September 2005 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the September 28, 2005 Board meeting at Santa Fe Community College Presentation Risk Assessment Corporation, Risk Assessments, Helen Grogan Consideration and Action on Recommendations

  2. Phase relations in the Fe–FeSi system at high pressures and temperatures

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect Journal Article: Phase relations in the Fe–FeSi system at high pressures and temperatures Citation Details In-Document Search Title: Phase relations in the Fe–FeSi system at high pressures and temperatures Authors: Fischer, Rebecca A. ; Campbell, Andrew J. ; Reaman, Daniel M. ; Miller, Noah A. ; Heinz, Dion L. ; Dera, Przymyslaw ; Prakapenka, Vitali B. [1] ; UC) [2] + Show Author Affiliations (Maryland) ( Publication Date: 2013-06-12 OSTI Identifier:

  3. Equations of state in the Fe-FeSi system at high pressures and temperatures

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect SciTech Connect Search Results Journal Article: Equations of state in the Fe-FeSi system at high pressures and temperatures Citation Details In-Document Search Title: Equations of state in the Fe-FeSi system at high pressures and temperatures Authors: Fischer, Rebecca A. ; Campbell, Andrew J. ; Caracas, Razvan ; Reaman, Daniel M. ; Heinz, Dion L. ; Dera, Przemyslaw ; Prakapenka, Vitali B. [1] ; UC) [2] ; Claude-Bernard) [2] + Show Author Affiliations

  4. Quasi-elastic region of the /sup 56/Fe + /sup 56/Fe and /sup 56/Fe + /sup 238/U reactions

    SciTech Connect (OSTI)

    Weston-Dawkes, A.P.

    1986-01-01

    Projectile-like fragments (PLF's) were detected for the 15-MeV/uFe + Fe and Fe + U reactions. The mass, charge and energy of the PLF's were recorded. For the Fe + Fe reaction light-charged particles were also recorded in coincidence with PLF's. Products with kinetic energies corresponding to the first 100 MeV of energy loss were studied in detail for a variety of questions that remain concerning the quasi-elastic region. PLF energy spectra clearly show the presence of structures. These structures can be classified as either narrow or broad in kinetic energy width. By use of evaporation calculations, it was shown that broad structures were due to normal evaporation processes. Narrow structures with widths of 8 to 10 MeV could not be duplicated by evaporation calculations and their origin is still unexplained.

  5. InP:Fe photoconducting device

    DOE Patents [OSTI]

    Hammond, R.B.; Paulter, N.G.; Wagner, R.S.

    A photoconducting device fabricated from Fe-doped, semi-insulating InP crystals exhibits an exponential decay transient with decay time inversely related to Fe concentration. Photoconductive gain as high as 5 is demonstrated in photoconducting devices with AuGe and AuSn contacts. Response times from 150 to 1000 picoseconds can be achieved.

  6. InP:Fe Photoconducting device

    DOE Patents [OSTI]

    Hammond, Robert B.; Paulter, Nicholas G.; Wagner, Ronald S.

    1984-01-01

    A photoconducting device fabricated from Fe-doped, semi-insulating InP crystals exhibits an exponential decay transient with decay time inversely related to Fe concentration. Photoconductive gain as high as 5 is demonstrated in photoconducting devices with AuGe and AuSn contacts. Response times from 150 to 1000 picoseconds can be achieved.

  7. FE FY 2015 Budget Request Presentation | Department of Energy

    Office of Environmental Management (EM)

    5 Budget Request Presentation FE FY 2015 Budget Request Presentation File fy15_budget_rollout.pptx More Documents & Publications FE FY 2017 BUDGET REQUEST PRESENTATION FE FY 2016

  8. FE FY 2016 BUDGET REQUEST PRESENTATION | Department of Energy

    Office of Environmental Management (EM)

    6 BUDGET REQUEST PRESENTATION FE FY 2016 BUDGET REQUEST PRESENTATION PDF icon FY16_budget_rollout 2-2-15.pdf More Documents & Publications FE FY 2015 Budget Request Presentation FE FY 2017

  9. Controlled Anisotropic Growth of Co-Fe-P from Co-Fe-O Nanoparticles

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mendoza-Garcia, Adriana; Zhu, Huiyuan; Yu, Yongsheng; Li, Qing; Zhou, Lin; Su, Dong; Kramer, Matthew J.; Sun, Shouheng

    2015-06-26

    Presented here is a facile approach to bimetallic phosphides, Co-Fe-P, via high-temperature (300°C) reaction between Co-Fe-O nanoparticles and trioctylphosphine. The growth of Co-Fe-P from the Co-Fe-O is anisotropic. As a result, Co-Fe-P nanorods (from the polyhedral Co-Fe-O nanoparticles) and sea-urchin-like Co-Fe-P (from the cubic Co-Fe-O nanoparticles) are synthesized with both nanorod and the sea-urchin-arm dimensions controlled by Co/Fe ratios. The Co-Fe-P structure, especially the sea-urchin-like (Co0.54Fe0.46)2P, shows enhanced catalysis for oxygen evolution reaction in KOH with its catalytic efficiency surpassing Ir catalyst. Our synthesis is simple and may be readily extended to the preparation of other multimetallic phosphides for importantmore » catalysis and energy storage applications.« less

  10. Controlled Anisotropic Growth of Co-Fe-P from Co-Fe-O Nanoparticles

    SciTech Connect (OSTI)

    Mendoza-Garcia, Adriana; Zhu, Huiyuan; Yu, Yongsheng; Li, Qing; Zhou, Lin; Su, Dong; Kramer, Matthew J.; Sun, Shouheng

    2015-06-26

    Presented here is a facile approach to bimetallic phosphides, Co-Fe-P, via high-temperature (300C) reaction between Co-Fe-O nanoparticles and trioctylphosphine. The growth of Co-Fe-P from the Co-Fe-O is anisotropic. As a result, Co-Fe-P nanorods (from the polyhedral Co-Fe-O nanoparticles) and sea-urchin-like Co-Fe-P (from the cubic Co-Fe-O nanoparticles) are synthesized with both nanorod and the sea-urchin-arm dimensions controlled by Co/Fe ratios. The Co-Fe-P structure, especially the sea-urchin-like (Co0.54Fe0.46)2P, shows enhanced catalysis for oxygen evolution reaction in KOH with its catalytic efficiency surpassing Ir catalyst. Our synthesis is simple and may be readily extended to the preparation of other multimetallic phosphides for important catalysis and energy storage applications.

  11. NNMCAB Board Minutes: September 2009 Santa Fe | Department of...

    Broader source: Energy.gov (indexed) [DOE]

    - September 30, 2009 More Documents & Publications NNMCAB Board Minutes: May 2009 Santa Fe NNMCAB Board Minutes: January 2009 Santa Fe NNMCAB Board Minutes: March 2009 Santa...

  12. A Series of Highly Stable Mesoporous Metalloporphyrin Fe-MOFs...

    Office of Scientific and Technical Information (OSTI)

    A Series of Highly Stable Mesoporous Metalloporphyrin Fe-MOFs Citation Details In-Document Search Title: A Series of Highly Stable Mesoporous Metalloporphyrin Fe-MOFs Authors: ...

  13. FE0023592 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    FE0023592 Breakthrough Hybrid CTL Process Integrating Advanced Technologies for Coal Gasification, NG Partial Oxidation, Warm Syngas Cleanup and Syngas-to-Jet Email Page email Print This Page print Performer: Research Triangle Institute fe0023592-image.jpg Block Flow Diagram of Hybrid Integrated CTL Process Website: Research Triangle Institute Award Number: FE0023592 Project Duration: 10/01/2014 - 03/31/2017 Total Award Value: $5,500,000.00 DOD Share: $3,981,705.00 DOE Share: $418,295.00

  14. Microsoft Word - Santa Fe Dec 14.doc

    National Nuclear Security Administration (NNSA)

    4, 2005 10 4:00 P.M. Genoveva Chavez Community Center 11 3221 Rodeo Road Santa Fe, New Mexico 12 13 14 15 16 FACILITATED BY: MARGO COVINGTON 17 18 19 20 REPORTED BY: Betty J. Lanphere, NM CCR #70 21 Betty J. Lanphere & Associates, Inc. Post Office Box 449 22 Santa Fe, New Mexico 87504 23 24 25 Betty J. Lanphere & Associates, Inc. P. O. Box 449 Santa Fe, New Mexico 87504 - (505) 983-7367 1 2 A P P E A R A N C E S 3 FOR DEPARTMENT OF ENERGY: 4 Lisa Cummings EIS Document Manager 5 U.S. DOE

  15. fe0014055-CMU | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Measurements and Modeling to Quantify Emissions of Methane and VOCs from Shale Gas Operations Last Reviewed 11302015 DE-FE0014055 Goal The goals of this project are to determine...

  16. NNMCAB Board Minutes: July 2005 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the July 27, 2005 Board meeting at Santa Fe Community College Presentation LANL, Public Health Assessment for Los Alamos National Laboratory, Michael Brooks Presentation LANL, Well Drilling Techniques, Groundwater Program

  17. NNMCAB Board Agenda: January 2014 Santa Fe

    Broader source: Energy.gov [DOE]

    Agenda for the January 29, 2014 Board meeting at Lodge at Santa Fe Presentation DOE.LANL, MDA-G Post TRU Waste Retrieval Proposed Remedy; A Path to Long Term Stewardship, Pete Maggiore, Jeff Mousseau

  18. fe0024311-ttu | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Maximize Liquid Oil Production from Shale Oil and Gas Condensate Reservoirs by Cyclic Gas Injection Last Reviewed 1242015 DE-FE0024311 Goal The project goal is to evaluate the...

  19. fe0013889-TEES | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    THCM Coupled Model for Hydrate-bearing Sediments: Data Analysis and Design of New Field Experiments (Marine and Permafrost Settings) Last Reviewed 11272015 DE-FE0013889 Goal The...

  20. NNMCAB Board Minutes: March 2005 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the March 30, 2005 Board meeting at Santa Fe Community College Consideration and Action on Recommendation 2005-03 Consideration and Action on Recommendation 2005-04

  1. fe0001547 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1547 Recovery Act: CO2 Capture From Biofuels Production and Sequestration into the Mt. Simon Sandstone Reservoir Email Page email Print This Page print Performer: Archer Daniels Midland Corporation (ADM) fe0001547 ADM's Agricultural Processing and Biofuels Plant, Decatur, IL. Website: Archer Daniels Midland Corporation (ADM) Award Number: FE0001547 Project Duration: 11/16/2009 - 09/30/2017 Total Award Value: $207,942,199.00 DOE Share: $141,405,945.00 Performer Share: $66,536,254.00 Technology

  2. fe0024360-paulsson | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    fe0024360-paulsson Injection and Tracking of Micro-seismic emitters to Optimize Unconventional Oil and Gas (UOG) Development Last Reviewed 12/2/2015 DE-FE0024360 Goal The project goal is to develop fracture and fractureproppant mapping and monitoring technologies that will allow for both efficient and environmentally prudent development of UOG by developing and simultaneously deploying two novel technologies in an UOG well. The first technology, an acoustic micro emitter (AME) can be mixed with

  3. DNA analysis conference in Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    DNA analysis conference in Santa Fe DNA analysis conference in Santa Fe Los Alamos National Laboratory is hosting a DNA sequence analysis and bioinformatics event, the 10th annual Sequencing, Finishing and Analysis in the Future (SFAF) workshop. May 27, 2015 DNA extracted from a soil sample is stored in a small vial of clear liquid. In general, living cells function by using the sequences of bases in their DNA as a blueprint for assembling proteins. A particularly important type of protein is

  4. High-pressure viscosity of liquid Fe and FeS revisited by falling sphere

    Office of Scientific and Technical Information (OSTI)

    viscometry using ultrafast X-ray imaging (Journal Article) | SciTech Connect SciTech Connect Search Results Journal Article: High-pressure viscosity of liquid Fe and FeS revisited by falling sphere viscometry using ultrafast X-ray imaging Citation Details In-Document Search Title: High-pressure viscosity of liquid Fe and FeS revisited by falling sphere viscometry using ultrafast X-ray imaging Authors: Kono, Yoshio ; Kenney-Benson, Curtis ; Shibazaki, Yuki ; Park, Changyong ; Shen, Guoyin ;

  5. Identification of Highly Active Fe Sites in (Ni,Fe)OOH for Electrocatalytic

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Water Splitting | Stanford Synchrotron Radiation Lightsource Identification of Highly Active Fe Sites in (Ni,Fe)OOH for Electrocatalytic Water Splitting Thursday, April 30, 2015 Operando XAS showing structural changes at Fe dopants in Ni(OH)2/NiOOH host structure. Ni(OH)2 is oxidized into γ-NiOOH under OER operating conditions, inducing significant M-O bond contraction at both Ni and Fe sites. Theoretical modeling of site specific OER overpotentials using DFT+U reveals the origin of

  6. Isolation and microbial reduction of Fe(III) phyllosilicates from

    Office of Scientific and Technical Information (OSTI)

    subsurface sediments (Journal Article) | SciTech Connect Isolation and microbial reduction of Fe(III) phyllosilicates from subsurface sediments Citation Details In-Document Search Title: Isolation and microbial reduction of Fe(III) phyllosilicates from subsurface sediments Fe(III)-bearing phyllosilicates can be important sources of Fe(III) for dissimilatory microbial iron reduction in clay-rich anoxic soils and sediments. The goal of this research was to isolate Fe(III) phyllosilicate

  7. NNMCAB Board Minutes: March 2009 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    09 Santa Fe NNMCAB Board Minutes: March 2009 Santa Fe At This Meeting: NNMCAB Written Reports Report on FY'11 EM Budget Report on Community Outreach Update from Liaisons (DOE, LANL, NMED) Consideration and Action on Recommendation PDF icon Board Minutes - March 25, 2009 More Documents & Publications NNMCAB Board Minutes: January 2009 Santa Fe NNMCAB Board Minutes: May 2009 Santa Fe NNMCAB Board Minutes: July 2008 Santa Fe

  8. 57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ma, Xiaoming; Ran, Sheng; Pang, Hua; Li, Fashen; Canfield, Paul C.; Bud'ko, Sergey L.

    2015-08-01

    With the advent of Fe–As based superconductivity it has become important to study how superconductivity manifests itself in details of 57Fe Mössbauer spectroscopy of conventional, Fe-bearing superconductors. The iron-based superconductor Lu2Fe3Si5 has been studied by 57Fe Mössbauer spectroscopy over the temperature range from 4.4 K to room temperature with particular attention to the region close to the superconducting transition temperature (Tc=6.1 K). Consistent with the two crystallographic sites for Fe in this structure, the observed spectra appear to have a pattern consisting of two doublets over the whole temperature range. Furthermore, the value of Debye temperature was estimated from temperaturemore » dependence of the isomer shift and the total spectral area and compared with the specific heat capacity data. Neither abnormal behavior of the hyperfine parameters at or near Tc, nor phonon softening were observed.« less

  9. Magnetic interaction in oxygenated alpha Fe-phthalocyanines

    SciTech Connect (OSTI)

    Kuzmann, Ern?, E-mail: kuzmann@caesar.elte.hu; Homonnay, Zoltn; Horvth, Attila [Institute of Chemistry, Etvs Lornd University, P.O. Box 32, 1512 Budapest (Hungary); Pechousek, Jiri; Cuda, Jan; Machala, Libor; Zoppellaro, Giorgio; Zboril, Radek [Regional Centre of Advanced Technologies and Materials, Departments of Experimental Physics and Physical Chemistry, Faculty of Science Palacky University, 17. Listopadu 1192/12, 771 46 Olomouc (Czech Republic); Yin, Houping; Wei, Yen [Department of Chemistry, Drexel University, Philadelphia, PA 19104 (United States); Klencsr, Zoltn [Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, 1117 (Hungary); Kubuki, Shiro [Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachi-Oji, Tokyo 192-0397 (Japan); Nath, Amar [Department of Chemistry, University of North Carolina, Asheville, NC 28804 (United States)

    2014-10-27

    Alpha iron phthalocyanines (?-FePc) oxygenated at low temperatures were investigated with the help of {sup 57}Fe Mssbauer spectroscopy, magnetization measurements (SQUID) and X-ray diffractometry (XRD). Mssbauer spectroscopy revealed that upon oxygenation of ?-FePc, new species were formed which could be associated with Fe{sup III}Pc oxygen adducts. Unexpectedly, magnetically split spectrum of oxygenated ?-FePc was observed below 20 K. In-field Mssbauer spectra in a 5 T external magnetic field at 5K and magnetization measurements indicate antiferromagnetic coupling in oxygenated ?-FePc.

  10. FE Categorical Exclusions | Department of Energy

    Energy Savers [EERE]

    FE Categorical Exclusions FE Categorical Exclusions RSS January 28, 2016 CX-200006: Categorical Exclusion Determination ConocoPhillips Alaska Natural Gas Corporation CX(s) Applied: B5.7 Date: 2/4/2016 Location(s): Other Offices(s): Fossil Energy, Natural Gas Regulation January 28, 2016 CX-200005: Categorical Exclusion Determination Bear Head LNG Corporation and Bear Head LNG (USA) CX(s) Applied: B5.7 Date: 1/28/2016 Location(s): Other Offices(s): Fossil Energy, Natural Gas Regulation January 28,

  11. Membrane separation advances in FE hydrogen program

    SciTech Connect (OSTI)

    2007-12-31

    Since its inception in Fiscal Year 2003 the US Office of Fossil Energy (FE) Hydrogen from Coal Program has sponsored more than 60 projects and made advances in the science of separating out pure hydrogen from syngas produced through coal gasification. The Program is focusing on advanced hydrogen separation technologies, which include membranes, and combining the WGS reaction and hydrogen separation in a single operation known as process intensification. The article explains the technologies and describes some key FE membrane projects. More details are available from http://www.fossil.energy.gov. 1 fig.

  12. Regulation of brain copper homeostasis by the brain barrier systems: Effects of Fe-overload and Fe-deficiency

    SciTech Connect (OSTI)

    Monnot, Andrew D.; Behl, Mamta; Ho, Sanna; Zheng, Wei

    2011-11-15

    Maintaining brain Cu homeostasis is vital for normal brain function. The role of systemic Fe deficiency (FeD) or overload (FeO) due to metabolic diseases or environmental insults in Cu homeostasis in the cerebrospinal fluid (CSF) and brain tissues remains unknown. This study was designed to investigate how blood-brain barrier (BBB) and blood-SCF barrier (BCB) regulated Cu transport and how FeO or FeD altered brain Cu homeostasis. Rats received an Fe-enriched or Fe-depleted diet for 4 weeks. FeD and FeO treatment resulted in a significant increase (+ 55%) and decrease (- 56%) in CSF Cu levels (p < 0.05), respectively; however, neither treatment had any effect on CSF Fe levels. The FeD, but not FeO, led to significant increases in Cu levels in brain parenchyma and the choroid plexus. In situ brain perfusion studies demonstrated that the rate of Cu transport into the brain parenchyma was significantly faster in FeD rats (+ 92%) and significantly slower (- 53%) in FeO rats than in controls. In vitro two chamber Transwell transepithelial transport studies using primary choroidal epithelial cells revealed a predominant efflux of Cu from the CSF to blood compartment by the BCB. Further ventriculo-cisternal perfusion studies showed that Cu clearance by the choroid plexus in FeD animals was significantly greater than control (p < 0.05). Taken together, our results demonstrate that both the BBB and BCB contribute to maintain a stable Cu homeostasis in the brain and CSF. Cu appears to enter the brain primarily via the BBB and is subsequently removed from the CSF by the BCB. FeD has a more profound effect on brain Cu levels than FeO. FeD increases Cu transport at the brain barriers and prompts Cu overload in the CNS. The BCB plays a key role in removing the excess Cu from the CSF.

  13. Notices DEPARTMENT OF ENERGY [FE Docket No. 10-161-LNG; FE Docket No.

    Broader source: Energy.gov (indexed) [DOE]

    0 Federal Register / Vol. 79, No. 107 / Wednesday, June 4, 2014 / Notices DEPARTMENT OF ENERGY [FE Docket No. 10-161-LNG; FE Docket No. 11-59-LNG; FE Docket No. 11-128-LNG; et. al.] Life Cycle Greenhouse Gas Perspective on Exporting Liquefied Natural Gas From the United States AGENCY: Office of Fossil Energy, Department of Energy. ACTION: Notice of Availability of Life Cycle Greenhouse Gas Perspective on Exporting Liquefied Natural Gas from the United States and request for comments. Freeport

  14. Ferromagnetism of Fe3Sn and alloys

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Sales, Brian C.; Saparov, Bayrammurad; McGuire, Michael A.; Singh, David J.; Parker, David S.

    2014-11-12

    Hexagonal Fe3Sn has many of the desirable properties for a new permanent magnet phase with a Curie temperature of 725 K, a saturation moment of 1.18 MA/m. and anisotropy energy, K1 of 1.8 MJ/m3. However, contrary to earlier experimental reports, we found both experimentally and theoretically that the easy magnetic axis lies in the hexagonal plane, which is undesirable for a permanent magnet material. One possibility for changing the easy axis direction is through alloying. We used first principles calculations to investigate the effect of elemental substitutions. The calculations showed that substitution on the Sn site has the potential tomore » switch the easy axis direction. Transition metal substitutions with Co or Mn do not have this effect. We attempted synthesis of a number of these alloys and found results in accord with the theoretical predictions for those that were formed. However, the alloys that could be readily made all showed an in-plane easy axis. The electronic structure of Fe3Sn is reported, as are some are magnetic and structural properties for the Fe3Sn2, and Fe5Sn3 compounds, which could be prepared as mm-sized single crystals.« less

  15. NNMCAB Board Minutes: March 2006 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the March 29, 2006 Board meeting at Santa Fe Community College Presentation DOE/LANL, Progress and Alternatives for Closure of MDA-L and MDA-G in the Corrective Measures Evaluation, Jim Orban, Dave McInroy

  16. NNMCAB Board Minutes: November 2005 Santa Fe

    Broader source: Energy.gov [DOE]

    Minutes of the November 30, 2005 Board meeting at Santa Fe Community College Presentation EPA, Impacts of Well Construction Practices on Los Alamos National Laboratory Presentation LANL, Pathways Protection Program-Environmental Stewardship Division on Groundwater Monitoring Issues at LANL, Jean Dewart

  17. SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE...

    Energy Savers [EERE]

    GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 PDF icon ...

  18. Structural Insights into FeMo Cofactor Biosynthesis

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    a catalytic component and a specific reductase, which, in the standard system, are referred to as the MoFe protein and the Fe protein. At the active site of the...

  19. Santa Fe Chamber of Commerce Business Awards Gala

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Santa Fe Chamber of Commerce Business Awards Gala Santa Fe Chamber of Commerce Business Awards Gala WHEN: Jun 04, 2015 5:30 PM - 7:30 PM WHERE: Skylight 139 West San Francisco...

  20. Santa Fe, New Mexico: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    stub. You can help OpenEI by expanding it. Santa Fe is a city in Santa Fe County, New Mexico. It falls under New Mexico's 3rd congressional district.12 Registered Energy...

  1. AgFe Management Ltd | Open Energy Information

    Open Energy Info (EERE)

    AgFe Management Ltd Jump to: navigation, search Name: AgFe Management Ltd Place: London, England, United Kingdom Zip: W11 1QF Product: London-based, Financial Asset Management and...

  2. 2011 Annual Planning Summary for Fossil Energy (FE)

    Broader source: Energy.gov [DOE]

    The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2011 and 2012 within Fossil Energy (FE).

  3. NNMCAB Board Minutes: January 2010 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    0 Santa Fe NNMCAB Board Minutes: January 2010 Santa Fe At This Meeting: NNMCAB Written Reports Open Forum for Members Presentation LANL, Status of Corrective Actions, Dave McInroy Presentation DOE, Natural Resource Damage Assessment, Nancy Werdel PDF icon Board Minutes - January 27, 2010 More Documents & Publications NNMCAB Board Minutes: November 2009 Santa Fe NNMCAB Board Minutes: July 2011 Los Alamos NNMCAB Board Minutes: January 2009 Santa Fe

  4. NNMCAB Board Minutes: November 2009 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    9 Santa Fe NNMCAB Board Minutes: November 2009 Santa Fe At This Meeting: NNMCAB Written Reports Consideration and Action on NNMCAB Annual Evaluation Report LANS End of Year Report Presentation LANL, Groundwater Monitoring System, Danny Katzman Presentation NNMCAB, Remote Handled 33 Shafts at Area G, Robert Villarreal PDF icon Board Minutes - November 18, 2009 More Documents & Publications NNMCAB Board Minutes: January 2010 Santa Fe NNMCAB Board Minutes: January 2009 Santa Fe NNMCAB Board

  5. Multiferroicity and spiral magnetism in FeVO{sub 4} with quenched Fe orbital moments

    SciTech Connect (OSTI)

    Daoud-Aladine, A.; Chapon, L. C.; Kundys, B.; Martin, C.; Simon, C.; Radaelli, P. G.; Brown, P. J.

    2009-12-01

    FeVO{sub 4} has been studied by heat capacity, magnetic susceptibility, electric polarization and single-crystal neutron-diffraction experiments. The triclinic crystal structure is made of S-shaped clusters of six Fe{sup 3+} ions, linked by VO{sub 4}{sup 3-} groups. Two long-range magnetic ordering transitions occur at T{sub N1}=22 K and T{sub N2}=15 K. Both magnetic structures are incommensurate and below T{sub N2}, FeVO{sub 4} becomes weakly ferroelectric coincidentally with the loss of the collinearity of the magnetic structure in a very similar fashion than in the classical TbMnO{sub 3} multiferroic material. However we argue that the symmetry considerations and the mechanisms invoked to explain these properties in TbMnO{sub 3} do not straightforwardly apply to FeVO{sub 4}. First, the magnetic structures, even the collinear structure, are all acentric so that ferroelectricity in FeVO{sub 4} is not correlated with the fact magnetic ordering is breaking inversion symmetry. Regarding the mechanism, FeVO{sub 4} has quenched orbital moments that questions the exact role of the spin-orbit interactions.

  6. Corrosion performance of Fe-Cr-Al and Fe aluminide alloys in complex gas environments

    SciTech Connect (OSTI)

    Natesan, K.; Johnson, R.N.

    1995-05-01

    Alumina-forming structural alloys can offer superior resistance to corrosion in the presence of sulfur-containing environments, which are prevalent in coal-fired fossil energy systems. Further, Fe aluminides are being developed for use as structural materials and/or cladding alloys in these systems. Extensive development has been in progress on Fe{sub 3}Al-based alloys to improve their engineering ductility. In addition, surface coatings of Fe aluminide are being developed to impart corrosion resistance to structural alloys. This paper describes results from an ongoing program that is evaluating the corrosion performance of alumina-forming structural alloys, Fe-Al and Fe aluminide bulk alloys, and Fe aluminide coatings in environments typical of coal-gasification and combustion atmospheres. Experiments were conducted at 650-1000{degrees}C in simulated oxygen/sulfur gas mixtures. Other aspects of the program are corrosion evaluation of the aluminides in the presence of HCl-containing gases. Results are used to establish threshold Al levels in the alloys for development of protective alumina scales and to determine the modes of corrosion degradation that occur in the materials when they are exposed to S/Cl-containing gaseous environments.

  7. Interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions

    SciTech Connect (OSTI)

    Wang, Shouguo; Ward, R. C. C.; Zhang, Xiaoguang; Kohn, A.; Ma, Q. L.; Zhang, J.; Liu, H. F.; Han, Prof. X. F.

    2012-01-01

    Following predictions by first-principles theory of huge tunnel magnetoresistance (TMR) effect in epitaxial Fe/MgO/Fe magnetic tunnel junctions (MTJs), measured magnetoresistance (MR) ratio about 200% at room temperature (RT) have been reported in MgO-based epitaxial MTJs. Recently, MR ratio of about 600% has been reported at RT in MgO-based amorphous MTJs with core structure of CoFeB/MgO/CoFeB grown by magnetron sputtering with amorphous CoFeB layers. The sputtered CoFeB/MgO/CoFeB MTJs shows a great potential application in spintronic devices. Although epitaxial structure will probably not be used in devices, it remains an excellent model system to compare theoretical calculations with experimental results and to enhance our understanding of the spin dependent tunneling. Both theoretical calculations and experimental results clearly indicate that the interfacial structure plays a crucial role on coherent tunneling across single crystalMgO barrier, especially in epitaxial MgO-based MTJs grown by molecular beam epitaxy (MBE). Surface X-ray diffraction, Auger electron spectroscopy, X-ray absorption spectra, and X-ray magnetic circular dichroism have been used for interface characterization. However, no consistent viewpoint has been reached, and this is still an open issue. In this article, recent studies on the interface characterization in MgO-based epitaxial MTJs will be introduced, with a focus on research by X-ray photoelectron spectroscopy, high resolution transmission electron microscopy, and spin dependent tunneling spectroscopy.

  8. Comprehensive Fe-ligand vibration identification in {FeNO}6 Hemes

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Li, Jianfeng; Peng, Qian; Oliver, Allen G.; Alp, E. Ercan; Hu, Michael Y.; Zhao, Jiyong; Sage, J. Timothy; Scheidt, W. Robert

    2014-12-09

    Oriented single-crystal nuclear resonance vibrational spectroscopy (NRVS) has been used to obtain all iron vibrations in two {FeNO}6 porphyrinate complexes, five-coordinate [Fe(OEP)(NO)]ClO4 and six-coordinate [Fe(OEP)(2-MeHIm)(NO)]ClO4. A new crystal structure was required for measurements of [Fe(OEP)(2-MeHIm)(NO)]ClO4, and the new structure is reported herein. Single crystals of both complexes were oriented to be either parallel or perpendicular to the porphyrin plane and/or axial imidazole ligand plane. Thus, the FeNO bending and stretching modes can now be unambiguously assigned; the pattern of shifts in frequency as a function of coordination number can also be determined. The pattern is quite distinct from those foundmore » for CO or {FeNO}7 heme species. This is the result of unchanging Fe–NNO bonding interactions in the {FeNO}6 species, in distinct contrast to the other diatomic ligand species. DFT calculations were also used to obtain detailed predictions of vibrational modes. Predictions were consistent with the intensity and character found in the experimental spectra. The NRVS data allow the assignment and observation of the challenging to obtain Fe–Im stretch in six-coordinate heme derivatives. Furthermore, NRVS data for this and related six-coordinate hemes with the diatomic ligands CO, NO, and O2 reveal a strong correlation between the Fe–Im stretch and Fe–NIm bond distance that is detailed for the first time.« less

  9. Fe-implanted 6H-SiC: Direct evidence of Fe{sub 3}Si nanoparticles observed by atom probe tomography and {sup 57}Fe Mssbauer spectroscopy

    SciTech Connect (OSTI)

    Diallo, M. L.; Fnidiki, A. Lard, R.; Cuvilly, F.; Blum, I.; Lechevallier, L.; Debelle, A.; Thom, L.; Viret, M.; Marteau, M.; Eyidi, D.; Declmy, A.

    2015-05-14

    In order to understand ferromagnetic ordering in SiC-based diluted magnetic semiconductors, Fe-implanted 6H-SiC subsequently annealed was studied by Atom Probe Tomography, {sup 57}Fe Mssbauer spectroscopy and SQUID magnetometry. Thanks to its 3D imaging capabilities at the atomic scale, Atom Probe Tomography appears as the most suitable technique to investigate the Fe distribution in the 6H-SiC host semiconductor and to evidence secondary phases. This study definitely evidences the formation of Fe{sub 3}Si nano-sized clusters after annealing. These clusters are unambiguously responsible for the main part of the magnetic properties observed in the annealed samples.

  10. fe0013902-groundmetrics | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Evaluation of Deep Subsurface Resistivity Imaging for Hydrofracture Monitoring Last Reviewed 12/2/2015 DE-FE0013902 Goal The goal of this project is to quantify how well an in-situ measurement of bulk electrical resistivity using the new method of Depth to Surface Electromagnetic (DSEM) imaging can be related to the changes in rock properties and fluid propagation that occur as a result of hydraulic fracturing. Performer GroundMetrics, Inc. (GMI), San Diego, CA, 92123 Collaborators Global

  11. fe0014144-Oceanit | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    EXPLORATION AND PRODUCTION TECHNOLOGIES "Nanite" for Better Well-Bore Integrity and Zonal Isolation Last Reviewed 12/2/2015 DE-FE0014144 Goal The project goal is to demonstrate how real-time sensing of Nanite(tm) can improve long-term wellbore integrity and zonal isolation in shale gas and applicable oil and gas operations. Nanite is a cementitious material that contains a proprietary formulation of functionalized nanomaterial additive to transform conventional cement into a smart

  12. fe0022898-usgs | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alaska Natural Gas Hydrate Production Testing: Test Site Selection, Characterization, and Testing Operations Last Reviewed 6/30/2015 DE-FE0022898 Goal The primary goal of this project is to provide geologic and geophysical technical support to identify and characterize gas hydrate production test sites on the Alaska North Slope. Performer U.S. Geological Survey (USGS) - Denver, CO Background This Interagency Agreement is intended to support the DOE and its research partners in understanding,

  13. fe0024271-utaustin | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fracture Diagnostics Using Low Frequency Electromagnetic Induction and Electrically Conductive Proppants Last Reviewed 12/4/15 DE-FE0024271 Goal The project goal is to develop a new Low Frequency Electromagnetic Induction method, which has the potential to estimate not only the propped length, height, and orientation of hydraulic fractures but also the vertical distribution of proppant within the fracture. The proposed low frequency electromagnetic induction tool can be used to detect far-field

  14. fe0024292-gti | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resources - Field Labs Hydraulic Fracturing Test Site (HFTS) Last Reviewed 12/3/2015 DE-FE0024292 Goal This project is to conduct a field-based hydraulic fracturing research program for horizontal shale wells with the objectives of reducing and minimizing potential environmental impacts, demonstrating safe and reliable operations, and improving the efficiency of hydraulic fracturing. The research will advance our understanding of the hydraulic fracturing process in shale reservoirs, and thus,

  15. fe0024293-geglobal | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    nXis Well Integrity Inspection in Unconventional Wells Last Reviewed November 30, 2015 DE-FE0024293 Goal The goal of this project is to develop a novel well-integrity inspection system capable of providing enhanced information about the flaw structure and topology of conventional and unconventional gas-filled wells. This will be achieved by developing a novel combined X-ray/neutron backscatter imaging device, suitably sized for operation in well bores. Performers GE Global Inc., Niskayuna, NY

  16. fe0024296-msu | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resources Methods to Enhance Wellbore Cement Integrity with Microbially-Induced Calcite Precipitation (MICP) Last Reviewed 12/1/2015 DE-FE0024296 Goal The goal of this project is to develop improved methods for sealing compromised wellbore cement in leaking natural gas and oil wells, thereby reducing the risk of unwanted upward gas migration. Integrated laboratory testing, simulation modeling, and field testing will be conducted to achieve this goal. Performer Montana State University (MSU),

  17. fe0024297-WVU | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resources - Field Laboratories Marcellus Shale Energy and Environment Laboratory (MSEEL) Last Reviewed December 2015 DE-FE0024297 Goal The goal of the Marcellus Shale Energy and Environment Laboratory (MSEEL) is to provide a long-term field site to develop and validate new knowledge and technology to improve recovery efficiency and minimize environmental implications of unconventional resource development. Performer West Virginia University, Northeast Natural Energy and Ohio State University

  18. fe0024311-ttu | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Maximize Liquid Oil Production from Shale Oil and Gas Condensate Reservoirs by Cyclic Gas Injection Last Reviewed 12/4/2015 DE-FE0024311 Goal The project goal is to evaluate the oil recovery potential of cyclic gas injection. Detailed project objectives include: Studying the dominant mechanisms of gas injection in shale reservoirs (e.g., pressure maintenance or miscibility) Finding the most effective mode of gas injection in shale oil and gas condensate reservoirs (e.g., gas flooding or

  19. fe0024357-osu | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resources - Field Labs Utica Shale Energy and Environment Laboratory (USEEL) Last Reviewed 9/9/2015 DE-FE0024357 Goal The goal of this project is to develop and maintain a field research facility in the heart of the Utica Shale play that will provide a platform for environmental and geotechnical studies before, during, and after unconventional oil and gas (UOG) development. Performers The Ohio State University, Columbus, Ohio West Virginia University, Morgantown, West Virginia The Wilds,

  20. FE Clean Coal News | Department of Energy

    Energy Savers [EERE]

    Clean Coal News FE Clean Coal News RSS December 2, 2015 DOE Selects Projects To Enhance Its Research into Recovery of Rare Earth Elements from Coal and Coal Byproducts The U.S. Department of Energy's (DOE) National Energy Technology Laboratory (NETL) has selected 10 projects to receive funding for research in support of the lab's program on Recovery of Rare Earth Elements from Coal and Coal Byproducts. The selected research projects will further program goals by focusing on the development of

  1. FE Petroleum Reserves News | Department of Energy

    Energy Savers [EERE]

    Petroleum Reserves News FE Petroleum Reserves News RSS April 9, 2015 Contracts Awarded to Repurchase Oil for the Strategic Petroleum Reserve The U. S. Department of Energy announced the award of contracts for delivery of crude oil to the Strategic Petroleum Reserve. BP Products North America, Inc., will deliver 2,197,500 barrels and Noble Americas will deliver 2,000,000 barrels to the Reserve's Bryan Mound site in Freeport, Texas. Deliveries are expected to be completed by July 31, 2015.

  2. FE0001175_PTTC | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Targeted Technology Transfer for Oil and Natural Gas Last Reviewed 12/8/2014 DE-FE0001175 Goal The goal of this project is to conduct an encompassing suite of oil and natural gas related technology and information transfer activities that provide insight to producers and other stakeholders in a concise, meaningful format that encourages them to make timely and informed technical and business decisions. Performer Petroleum Technology Transfer Council,(PTTC), Tulsa, OK Collaborators Eastern: West

  3. FE0005961_UIllinois | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    RVA: 3-D Visualization and Analysis Software to Support Management of Unconventional Oil and Gas Resources Last Reviewed 12/2/2015 DE-FE0005961 Goal This project will produce a state-of-the-art 3-D visualization and analysis software package targeted for improving development of oil and gas resources. The software [RVA (Reservoir Visualization and Analysis)] will display data, models, and reservoir simulation results and have the ability to jointly visualize and query data from geologic models

  4. FE00880_RBDMS | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Risk Based Data Management System (RBDMS) and Cost Effective Regulatory Approaches (CERA) Related to Hydraulic Fracturing and Geologic Sequestration of Carbon Dioxide (CO2) Last Reviewed 11/30/2015 DE-FE0000880 Goal The goal of this project is to enhance the RBDMS by adding new components relevant to environmental topics associated with hydraulic fracturing (HF), and by management of myriad data regarding oil and natural gas well histories, brine disposal, production, enhanced recovery,

  5. International science conferences in Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    International science conferences International science conferences in Santa Fe The conference are 2012 International Conference on Defects in Insulating Materials and Computer Simulation of Radiation Effects in Solids. June 22, 2012 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los

  6. La Fonda on the Plaza --- Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    La Fonda on the Plaza --- Santa Fe March 8 to 11, 2015 Quantum and Dirac Materials for Energy Applications Conference Welcome to the Quantum and Dirac Materials for Energy Applications Conference (QDM-15). This conference follows the Competing Orders in Functional Materials and their Applications Workshop, which was held at Nordita in Stockholm, Sweden in June of 2013. The Quantum and Dirac Materials for Energy Applications Conference is hosted by the Institute for Materials Science (IMS) at Los

  7. The Office of Fossil Energy's (FE) Clean

    Energy Savers [EERE]

    Office of Fossil Energy's (FE) Clean Coal Technology Demonstration Program (1986-1993) laid the foundation for effective technologies now in use that have helped significantly lower emissions of sulfur dioxide (SO 2 ), nitrogen oxides (NO x ) and airborne particulates (PM 10 ). The program forged cost-sharing partnerships between the U.S. Department of Energy, industry, universities and technology suppliers and users. The U.S. General Accounting Office said the program demonstrated "how the

  8. FE Speeches and Testimony | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Speeches and Testimony FE Speeches and Testimony RSS March 25, 2014 DOE's Program Regulating Liquefied Natural Gas Export Applications Statement of Paula Gant, Deputy Assistant Secretary for Oil and Natural Gas, Before the House Subcommittee on Energy and Power, Committee on Energy and Commerce March 25, 2014 FY 2015 Appropriations Hearing Statement by Christopher Smith, Principal Deputy Assistant Secretary for Fossil Energy before the House Committee on Appropriations Subcommittee on Energy and

  9. VERY LATE PHOTOMETRY OF SN 2011fe

    SciTech Connect (OSTI)

    Kerzendorf, W. E. [Department of Astronomy and Astrophysics, University of Toronto, 50 Saint George Street, Toronto, ON M5S 3H4 (Canada); Taubenberger, S.; Seitenzahl, I. R.; Ruiter, A. J., E-mail: wkerzendorf@gmail.com [Max-Planck-Institut fr Astrophysik, Karl-Schwarzschild-Strae 1, D-85748 Garching (Germany)

    2014-12-01

    The Type Ia supernova SN 2011fe is one of the closest supernovae of the past decades. Due to its proximity and low dust extinction, this object provides a very rare opportunity to study the extremely late time evolution (>900 days) of thermonuclear supernovae. In this Letter, we present our photometric data of SN 2011fe taken at an unprecedented late epoch of ?930 days with GMOS-N mounted on the Gemini North telescope (g=23.43 0.28, r=24.14 0.14, i=23.91 0.18, and z=23.90 0.17) to study the energy production and retention in the ejecta of SN 2011fe. Together with previous measurements by other groups, our result suggests that the optical supernova light curve can still be explained by the full thermalization of the decay positrons of {sup 56}Co. This is in spite of theoretical predicted effects (e.g., infrared catastrophe, positron escape, and dust) that advocate a substantial energy redistribution and/or loss via various processes that result in a more rapid dimming at these very late epochs.

  10. 57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ma, Xiaoming; Ran, Sheng; Pang, Hua; Li, Fashen; Canfield, Paul C.; Bud'ko, Sergey L.

    2015-03-28

    With the advent of Fe–As based superconductivity it has become important to study how superconductivity manifests itself in details of 57Fe Mössbauer spectroscopy of conventional, Fe-bearing superconductors. The iron-based superconductor Lu2Fe3Si5 has been studied by 57Fe Mössbauer spectroscopy over the temperature range from 4.4 K to room temperature with particular attention to the region close to the superconducting transition temperature (Tc=6.1 K). Furthermore, consistent with the two crystallographic sites for Fe in this structure, the observed spectra appear to have a pattern consisting of two doublets over the whole temperature range. The value of Debye temperature was estimated from temperaturemore » dependence of the isomer shift and the total spectral area and compared with the specific heat capacity data. As a result, neither abnormal behavior of the hyperfine parameters at or near Tc, nor phonon softening were observed.« less

  11. Incorporation of oxidized uranium into Fe (hydr)oxides during Fe(II) catalyzed remineralization

    SciTech Connect (OSTI)

    Nico, Peter S.; Stewart, Brandy D.; Fendorf, Scott

    2009-07-01

    The form of solid phase U after Fe(II) induced anaerobic remineralization of ferrihydrite in the presence of aqueous and absorbed U(VI) was investigated under both abiotic batch and biotic flow conditions. Experiments were conducted with synthetic ground waters containing 0.168 mM U(VI), 3.8 mM carbonate, and 3.0 mM Ca{sup 2+}. In spite of the high solubility of U(VI) under these conditions, appreciable removal of U(VI) from solution was observed in both the abiotic and biotic systems. The majority of the removed U was determined to be substituted as oxidized U (U(VI) or U(V)) into the octahedral position of the goethite and magnetite formed during ferrihydrite remineralization. It is estimated that between 3% and 6% of octahedral Fe(III) centers in the new Fe minerals were occupied by U(VI). This site specific substitution is distinct from the non-specific U co-precipitation processes in which uranyl compounds, e.g. uranyl hydroxide or carbonate, are entrapped with newly formed Fe oxides. The prevalence of site specific U incorporation under both abiotic and biotic conditions and the fact that the produced solids were shown to be resistant to both extraction (30 mM KHCO{sub 3}) and oxidation (air for 5 days) suggest the potential importance of sequestration in Fe oxides as a stable and immobile form of U in the environment.

  12. Proteome of Geobacter sulfurreducens grown with Fe(III) oxide or Fe(III) citrate as the electron acceptor.

    SciTech Connect (OSTI)

    Ding, Y-H R.; Hixson, Kim K.; Aklujkar, Ma; Lipton, Mary S.; Smith, Richard D.; Lovley, Derek R.; Mester, Tunde

    2008-12-01

    e(III) oxides are the most abundant source of reducible Fe(III) by microorganisms in most soils and sediments, yet few studies on the physiology of Fe(III)-reducing microorganisms during growth on Fe(III) oxide have been conducted because of the technical difficulties in working with cell growth and harvest in the presence of Fe(III) oxides. Geobacter sulfurreducens is a representative of the Geobacter species that predominate in a variety of subsurface environments in which Fe(III) oxide is important. In order to better understand the physiology of Geobacter species during growth on Fe(III) oxide, the proteome of G. sulfurreducens grown on Fe(III) oxide was compared with the proteome of cells grown with soluble Fe(III) citrate. Two-dimensional polyacrylamide gel electrophoresis (2-D PAGE) revealed 19 proteins that were more abundant during growth on Fe(III) oxide than on soluble Fe(III). These included proteins related to protein synthesis, electron transfer and energy production, oxidative stress, protein folding, outer membrane proteins, nitrogen metabolism and hypothetical proteins. Further analysis of the proteome with the accurate mass and time (AMT) tag method revealed additional proteins associated with growth on Fe(III) oxide. These included the outer-membrane c-type cytochrome, OmcS and OmcG, which genetic studies have suggested are required for Fe(III) oxide reduction. Furthermore, several other cytochromes, as yet unstudied, were detected to be significantly up regulated during growth on Fe(III) oxide and other proteins of unknown function were more abundant during growth on Fe(III) oxide than on soluble Fe(III). PilA, the structural protein for pili, which is required for Fe(III) oxide reduction, and other pilin-associated proteins were also more abundant during growth on Fe(III) oxide. Confirmation of the differential expression of proteins known to be important in Fe(III) oxide reduction was observed, and an additional number of previously unidentified proteins were found with significant abundance in the cells grown under conditions of Fe(III) oxide reduction.

  13. On the transition rates of the Fe X and Fe XIV corona lines

    SciTech Connect (OSTI)

    Trabert, E

    2003-11-20

    Despite a considerable scatter of the theoretical predictions of the M1/E2 transition rate of the ''red iron line'' (FeX) in the solar corona, there is disagreement of all the results with the single measurement that used an electrostatic ion trap. Employing a heavy-ion storage ring for measuring the same transition in isoelectronic ions of Co, Ni, and Cu, the situation has been clarified, and a new data point for FeX can be determined by extrapolation. This result agrees with the basic atomic structure prediction for the line strength in combination with the experimental transition energy. For the ''green iron line'' (FeXIV), a recent measurement with an electron beam ion trap has resolved similar discrepancies.

  14. Interfacial electronic transport phenomena in single crystalline Fe-MgO-Fe thin barrier junctions

    SciTech Connect (OSTI)

    Gangineni, R. B.; Negulescu, B.; Baraduc, C.; Gaudin, G.

    2014-05-05

    Spin filtering effects in nano-pillars of Fe-MgO-Fe single crystalline magnetic tunnel junctions are explored with two different sample architectures and thin MgO barriers (thickness: 3–8 monolayers). The two architectures, with different growth and annealing conditions of the bottom electrode, allow tuning the quality of the bottom Fe/MgO interface. As a result, an interfacial resonance states (IRS) is observed or not depending on this interface quality. The IRS contribution, observed by spin polarized tunnel spectroscopy, is analyzed as a function of the MgO barrier thickness. Our experimental findings agree with theoretical predictions concerning the symmetry of the low energy (0.2 eV) interfacial resonance states: a mixture of Δ{sub 1}-like and Δ{sub 5}-like symmetries.

  15. Stellar and laboratory XUV/EUV line ratios in Fe XVIII and Fe XIX

    SciTech Connect (OSTI)

    Traebert, E.; Beiersdorfer, P.; Clementson, J.

    2012-05-25

    A so-called XUV excess has been suspected with the relative fluxes of Fe XVIII and Fe XIX lines observed in the XUV and EUV ranges of the spectrum of the star Capella as observed by the Chandra spacecraft, even after correction for interstellar absorption. This excess becomes apparent in the comparison of the observations with simulations of stellar spectra obtained using collisional-radiative models that employ, for example, the Atomic Plasma Emission Code (APEC) or the Flexible Atomic Code (FAC). We have addressed this problem by laboratory studies using the Livermore electron beam ion trap (EBIT).

  16. [?/Fe]ABUNDANCES OF FOUR OUTER M31 HALO STARS

    SciTech Connect (OSTI)

    Vargas, Luis C.; Geha, Marla; Tollerud, Erik J. [Department of Astronomy, Yale University, 260 Whitney Avenue, New Haven, CT 06511 (United States); Gilbert, Karoline M. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Kirby, Evan N. [California Institute of Technology, 1200 East California Boulevard, MC 249-17, Pasadena, CA 91125 (United States); Guhathakurta, Puragra, E-mail: luis.vargas@yale.edu [UCO/Lick Observatory and Department of Astronomy and Astrophysics, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States)

    2014-12-10

    We present alpha element to iron abundance ratios, [?/Fe], for four stars in the outer stellar halo of the Andromeda Galaxy (M31). The stars were identified as high-likelihood field halo stars by Gilbert et al. and lie at projected distances between 70 and 140 kpc from M31's center. These are the first alpha abundances measured for a halo star in a galaxy beyond the Milky Way. The stars range in metallicity between [Fe/H] = 2.2 and [Fe/H] = 1.4. The sample's average [?/Fe] ratio is +0.20 0.20. The best-fit average value is elevated above solar, which is consistent with rapid chemical enrichment from Type II supernovae. The mean [?/Fe] ratio of our M31 outer halo sample agrees (within the uncertainties) with that of Milky Way inner/outer halo stars that have a comparable range of [Fe/H].

  17. fe0014066-battelle | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Development and Validation of an Acid Mine Drainage Treatment Process for Source Water Last Reviewed 12/11/2015 DE-FE00 14066 Goal The goal of this project is to research and optimize a Floatation Liquid-Liquid Extraction (FLLX) water treatment system to process and repurpose water of lesser quality, i.e., acid mine drainage (AMD water) for use in hydraulic fracturing (HF) operations and assess the feasibility of using the system byproducts for flowback water processing. The objectives of this

  18. fe0024314-swri | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Development and Field Testing Novel Natural Gas Surface Process Equipment for Replacement of Water as Primary Hydraulic Fracturing Fluid Last Reviewed 11/30/2015 DE-FE0024314 Goal The goal of this project is to develop and field test the use of readily available natural gas collected at the wellhead as a primary fracturing fluid. The work proposes to develop, validate, and demonstrate affordable non-water-based and non CO2-based stimulation technologies, which can be used instead of, or in

  19. FE0005889_UTPermian | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Case Studies of the ROZ CO2 Flood and the Combined ROZ/MPZ CO2 Flood at the Goldsmith Landreth Unit, Ector County, Texas Last Reviewed 11/30/2015 DE-FE0005889 Goal The goal of the project is to assist in optimizing the technical and economic performance of a residual oil zone (ROZ) carbon dioxide (CO2) flood and transfer the knowledge to other operators. The objectives are to (1) characterize the main pay zone (MPZ) and ROZ within the ROZ pilot area; (2) conduct laboratory analyses and reservoir

  20. FE0005902-UTA | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Novel CO2 Foam Concepts and Injection Schemes for Improving CO2 Sweep Efficiency in Sandstone and Carbonate Hydrocarbon Formations Last Reviewed 6/12/2015 DE-FE0005902 Goal The goal of this project is to develop mobility control agents using surfactants injected with carbon dioxide (CO2) rather than with water for CO2 enhanced oil recovery (CO2-EOR) in heterogeneous carbonate and sandstone reservoirs. Objectives are to (1) reduce CO2 mobility in CO2 swept portions of the reservoir-but not at the

  1. FE0005958-Impact | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Improved Mobility Control in CO2 Enhanced Recovery Using SPI Gels Last Reviewed 12/8/2014 DE-FE0005958 Goal The goal of this project is to demonstrate the potential of using Silica Polymer Initiator-Carbon dioxide (SPI-CO2) gel systems for profile modifications in CO2 injection/ production wells. The objective is to advance SPI-CO2Enhanced Oil Recovery (EOR) gel technology by performing multiple small-scale field injectivity tests using both 'Huff & Puff' and conventional pattern flood

  2. FE0005979-NMIMT | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nanoparticle-stabilized CO2 Foam for CO2-EOR Application Last Reviewed 5/26/2015 DE-FE0005979 Goal The goal of this project is to develop and evaluate, through coreflood tests at reservoir conditions, a nanoparticle-stabilized carbon dioxide (CO2) foam system that can improve CO2 sweep efficiency in CO2 enhanced oil recovery (EOR) and minimize particle retention in the reservoir. Performer New Mexico Institute of Mining and Technology/Petroleum Recovery Research Center, Socorro, NM 87801-4681

  3. NNMCAB Board Minutes: May 2008 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    May 2008 Santa Fe NNMCAB Board Minutes: May 2008 Santa Fe At This Meeting: Development of Ad Hoc Committee Election of Vice-Chair to Fill Term Consideration and Action on NNMCAB Bylaws Amendment Subcommittee Reports Presentation San Ildefonso, Tribal Risk Assessment, Raymond Martinez PDF icon Board Minutes - May 22, 2008 More Documents & Publications NNMCAB Board Minutes: May 2007 Pojoaque NNMCAB Board Minutes: September 2009 Santa Fe NNMCAB Board Minutes: November 2007

  4. FE's Corbin Among DOE Leaders Selected to Receive Prestigious Award |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy FE's Corbin Among DOE Leaders Selected to Receive Prestigious Award FE's Corbin Among DOE Leaders Selected to Receive Prestigious Award January 6, 2016 - 3:38pm Addthis 2015 Presidential Rank Awards 2015 Presidential Rank Awards Secretary Ernest Moniz has announced that Fossil Energy's (FE) Bob Corbin, Deputy Assistant Secretary for the Office of Petroleum Reserves, is one of 11 leaders from the Department of Energy (DOE) selected to receive a 2015 Presidential Rank

  5. NNMCAB Board Minutes: November 2007 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    7 Santa Fe NNMCAB Board Minutes: November 2007 Santa Fe At This Meeting: Consideration and Action on EM SSAB Chairs Letters Subcommittee Reports Update from Liaisons (EPA, DOE, NMED) Consideration and Action on Recommendation 2007-05 Presentation LANL, LANL Responses to 17 National Academies of Sciences Recommendations Regarding Groundwater Monitoring, Huber PDF icon Board Minutes - November 28, 2007 More Documents & Publications NNMCAB Board Minutes: September 2007 Santa Fe NNMCAB Board

  6. NNMCAB Board Minutes: September 2007 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    7 Santa Fe NNMCAB Board Minutes: September 2007 Santa Fe At This Meeting: Consideration and Action on Recommendation 2007-03 Consideration and Action on Recommendation 2007-04 Update from Liaisons (EPA, DOE, LANS, NMED) Approval of FY'2008 Committee Work Plans Presentation DOE, Quarterly Performance Reports on Environmental Programs, George Rael PDF icon Board Minutes - September 19, 2007 More Documents & Publications NNMCAB Board Minutes: November 2007 Santa Fe NNMCAB Board Minutes: May

  7. Exponentially decaying magnetic coupling in sputtered thin film FeNi/Cu/FeCo trilayers

    SciTech Connect (OSTI)

    Wei, Yajun Akansel, Serkan; Thersleff, Thomas; Brucas, Rimantas; Lansaker, Pia; Leifer, Klaus; Svedlindh, Peter; Harward, Ian; Celinski, Zbigniew; Ranjbar, Mojtaba; Dumas, Randy K.; Jana, Somnath; Pogoryelov, Yevgen; Karis, Olof; Åkerman, Johan

    2015-01-26

    Magnetic coupling in trilayer films of FeNi/Cu/FeCo deposited on Si/SiO{sub 2} substrates have been studied. While the thicknesses of the FeNi and FeCo layers were kept constant at 100 Å, the thickness of the Cu spacer was varied from 5 to 50 Å. Both hysteresis loop and ferromagnetic resonance results indicate that all films are ferromagnetically coupled. Micromagnetic simulations well reproduce the ferromagnetic resonance mode positions measured by experiments, enabling the extraction of the coupling constants. Films with a thin Cu spacer are found to be strongly coupled, with an effective coupling constant of 3 erg/cm{sup 2} for the sample with a 5 Å Cu spacer. The strong coupling strength is qualitatively understood within the framework of a combined effect of Ruderman-Kittel-Kasuya-Yosida and pinhole coupling, which is evidenced by transmission electron microscopy analysis. The magnetic coupling constant surprisingly decreases exponentially with increasing Cu spacer thickness, without showing an oscillatory thickness dependence. This is partially connected to the substantial interfacial roughness that washes away the oscillation. The results have implications on the design of multilayers for spintronic applications.

  8. Fe Atomic Data for Non-equilibrium Ionization Plasmas Eriksen...

    Office of Scientific and Technical Information (OSTI)

    Fe Atomic Data for Non-equilibrium Ionization Plasmas Eriksen, Kristoffer A. Los Alamos National Laboratory; Fontes, Christopher J. Los Alamos National Laboratory; Colgan,...

  9. Nanoimprint-lithography Patterned Epitaxial Fe Nanowire Arrays...

    Office of Scientific and Technical Information (OSTI)

    epitaxial Fe nanowire arrays on MgO(001) substrates by nanoimprint lithography with a direct metallization of epitaxial materials through a metallic mask, which avoided the...

  10. Santa Fe New Mexican: For cybersecurity, in quantum encryption...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    For cybersecurity, in quantum encryption we trust Santa Fe New Mexican: For cybersecurity, in quantum encryption we trust Los Alamos physicists developed a quantum random number...

  11. Santa Fe Oversize/Overweight Permit Application | Open Energy...

    Open Energy Info (EERE)

    Reference LibraryAdd to library Legal Document- Permit ApplicationPermit Application: Santa Fe OversizeOverweight Permit ApplicationLegal Published NA Year Signed or Took...

  12. Santa Fe Community College offers new welding program

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Santa Fe Community College Offers Welding Program Community Connections: Your link to news and opportunities from Los Alamos National Laboratory Latest Issue: Dec. 2015-Jan. 2016...

  13. QER Public Meeting Santa Fe, NM Electricity Infrastructure Transmissio...

    Broader source: Energy.gov (indexed) [DOE]

    QER Public Meeting Santa Fe, NM Electricity Infrastructure Transmission, Storage, and Distribution - Jurisdictional issues and priorities Remarks of Susan Ackerman, Chair, Oregon...

  14. Building operator certification offered in Santa Fe next year

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The coursework is provided by the Santa Fe Community College's Center of Excellence in Green Building and Energy Efficiency. January 1, 2013 dummy image Read our archives. Contacts ...

  15. Los Alamos National Security invests in Santa Fe Community College...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Los Alamos National Security invests in Santa Fe Community College Foundation The new center is an educational and training facility for alternative energy and green jobs. July 16, ...

  16. Phase coexistence in the Fe-Nd system

    SciTech Connect (OSTI)

    Cabral, F.A.O.; Gama, S. , Caixa Postal 6165, 13081 Campinas, Sao Paulo )

    1989-01-01

    The authors discuss phase coexistence in the Fe-Nd binary system investigated by metallography, x-ray diffractometry, electron microprobe analysis, and differential thermal analysis. The technique of diffusion couples also has been used. The Fe/sub 17/Nd/sub 2/ compound is peritectically formed at 1185{sup 0}C and the eutectic reaction is L {yields} Fe/sub 17/Nd/sub 2/ + Nd/sup */, occurring at 670{sup 0}C; the Fe/sub 2/Nd phase was not found. A double thermal arrest is observed at the eutectic temperature and its origin is not well understood yet.

  17. Local structure of Fe in Fe-doped misfit-layered calcium cobaltite: An X-ray absorption spectroscopy study

    SciTech Connect (OSTI)

    Prasoetsopha, Natkrita; Pinitsoontorn, Supree; Bootchanont, Atipong; Kidkhunthod, Pinit; Srepusharawoot, Pornjuk; Kamwanna, Teerasak; Amornkitbamrung, Vittaya; Kurosaki, Ken; Yamanaka, Shinsuke

    2013-08-15

    Polycrystalline Ca{sub 3}Co{sub 4?x}Fe{sub x}O{sub 9+?} ceramics (x=0, 0.01, 0.03, 0.05) were fabricated using a simple thermal hydro-decomposition method and a spark plasma sintering technique. Thermoelectric property measurements showed that increasing Fe concentration resulted in a decrease in electrical resistivity, thermopower and thermal conductivity, leading to an improvement in the dimensionless figure-of-merit, >35% for x=0.05 at 1073 K. An X-ray absorption spectroscopy technique was used to investigate the local structure of Fe ions in the Ca{sub 3}Co{sub 4?x}Fe{sub x}O{sub 9+?} structure for the first time. By fitting data from the extended X-ray absorption fine structure (EXAFS) spectra and analyzing the X-ray absorption near-edge structure (XANES) spectra incorporated with first principle simulation, it was shown that Fe was substituted for Co in the the Ca{sub 2}CoO{sub 3} (rocksalt, RS) layer rather than in the CoO{sub 2} layer. Variation in the thermoelectric properties as a function of Fe concentration was attributed to charge transfer between the CoO{sub 2} and the RS layers. The origin of the preferential Fe substitution site was investigated considering the ionic radii of Co and Fe and the total energy of the system. - Graphical abstract: The Fe K-edge XANES spectra of: (a) experimental result in comparison to the simulated spectra when Fe atoms were substituted in the RS layer; (b) with magnetic moment; (c) without magnetic moment, and in the CoO{sub 2} layer; (d) with magnetic moment and (e) without magnetic moment. Highlights: Synthesis, structural studies, and thermoelectric properties of Ca{sub 3}Co{sub 4?x}Fe{sub x}O{sub 9+?}. Direct evidence for the local structure of the Fe ions in the Ca{sub 3}Co{sub 4?x}Fe{sub x}O{sub 9+?} using XAS analysis. EXAFS and XANES analysis showed that Fe was likely to be situated in the RS layer structure. Changes in TE property with Fe content was due to charge transfer between the CoO{sub 2} and the RS layers. Total energy calculation showed energetically favorable Fe substitution in the RS layer.

  18. Spin and charge transport in double-junction Fe/MgO/GaAs/MgO/Fe heterostructures

    SciTech Connect (OSTI)

    Wolski, S. Szczepa?ski, T.; Dugaev, V. K.; Barna?, J.; Landgraf, B.; Slobodskyy, T.; Hansen, W.

    2015-01-28

    We present theoretical and experimental results on tunneling current in single Fe/MgO/GaAs and double Fe/MgO/GaAs/MgO/Fe tunnel junctions. The charge and spin currents are calculated as a function of external voltage for different sets of parameters characterizing the semiconducting GaAs layer. Transport characteristics of a single Fe/MgO/GaAs junction reveal typical diode as well as spin diode features. The results of numerical calculations are compared with current-voltage characteristics measured experimentally for double tunnel junction structures, and a satisfactory agreement of the theoretical and experimental results has been achieved.

  19. Slide 1

    Energy Savers [EERE]

    23 rd Ultra-Deepwater Advisory Committee Meeting NETL Office, Sugar Land, TX Tuesday, September 17, 2013 RPSEA Administered Cost Share Research Overview: Ultra-Deepwater Program rpsea.org James Pappas, P.E. Vice President, Ultra-Deepwater Programs jpappas@rpsea.org (281) 690-5511 rpsea.org 2 Outline o Current UDW Program Status o Technical Accomplishments FY 2013 * Accomplishments * Significant Findings * Safety & Environment Impact o Plan Forward * 2012 Solicitation - Selection Progress *

  20. Photoinduced reduction of surface states in Fe:ZnO

    SciTech Connect (OSTI)

    Knut, R. Palmgren, P.; Karis, O.; Lagerqvist, U.; Pohl, A.; Pal, P.; Svedlindh, P.

    2015-05-28

    We report on the electronic structure of nano-crystalline Fe:ZnO, which has recently been found to be an efficient photocatalyst. Using resonant photoemission spectroscopy, we determine the binding energy of Fe 3d states corresponding to different valencies and coordination of the Fe atoms. The photo-activity of ZnO reduces Fe from 3+ to 2+ in the surface region of the nano-crystalline material due to the formation of oxygen vacancies. Electronic states corresponding to low-spin Fe{sup 2+} are observed and attributed to crystal field modification at the surface. These states are potentially important for the photocatalytic sensitivity to visible light due to their location deep in the ZnO bandgap. X-ray absorption and x-ray photoemission spectroscopy suggest that Fe is only homogeneously distributed for concentrations up to 3%. Increased concentrations does not result in a higher concentration of Fe ions in the surface region. This is limiting the photocatalytic functionality of ZnO, where the most efficient Fe doping concentration has been shown to be 1%-4%.

  1. FE Budget-in-Brief FY 2014 | Department of Energy

    Office of Environmental Management (EM)

    Budget-in-Brief FY 2014 FE Budget-in-Brief FY 2014 PDF icon Fossil Energy Budget-in-Brief for FY 2014 More Documents & Publications Fossil Energy FY 2015 Budget in Brief Fossil Energy FY 2013 Budget-in-Brief FE FY 2017 BUDGET REQUEST PRESENTATION

  2. F.E. Warren Air Force Base Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    F.E. Warren Air Force Base Wind Farm Jump to: navigation, search Name F.E. Warren Air Force Base Wind Farm Facility F.E. Warren Air Force Base Sector Wind energy Facility Type...

  3. Delocalized Molecular Orbitals of the [6Fe-6S] Cluster of the...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Delocalized Molecular Orbitals of the 6Fe-6S Cluster of the FeFe-Hydrogenase Hydrogenases catalyze the stoichiometrically simple (H2 2 H+ + 2 e-), but energetically difficult...

  4. Bulk amorphous steels based on Fe alloys

    DOE Patents [OSTI]

    Lu, ZhaoPing; Liu, Chain T.

    2006-05-30

    A bulk amorphous alloy has the approximate composition: Fe.sub.(100-a-b-c-d-e)Y.sub.aMn.sub.bT.sub.cM.sub.dX.sub.e wherein: T includes at least one of the group consisting of: Ni, Cu, Cr and Co; M includes at least one of the group consisting of W, Mo, Nb, Ta, Al and Ti; X includes at least one of the group consisting of Co, Ni and Cr; a is an atomic percentage, and a<5; b is an atomic percentage, and b.ltoreq.25; c is an atomic percentage, and c.ltoreq.25; d is an atomic percentage, and d.ltoreq.25; and e is an atomic percentage, and 5.ltoreq.e.ltoreq.30.

  5. Electron transfer activation of a second water channel for proton transport in [FeFe]-hydrogenase

    SciTech Connect (OSTI)

    Sode, Olaseni; Voth, Gregory A.

    2014-12-14

    Hydrogenase enzymes are important because they can reversibly catalyze the production of molecular hydrogen. Proton transport mechanisms have been previously studied in residue pathways that lead to the active site of the enzyme via residues Cys299 and Ser319. The importance of this pathway and these residues has been previously exhibited through site-specific mutations, which were shown to interrupt the enzyme activity. It has been shown recently that a separate water channel (WC2) is coupled with electron transport to the active site of the [FeFe]-hydrogenase. The water-mediated proton transport mechanisms of the enzyme in different electronic states have been studied using the multistate empirical valence bond reactive molecular dynamics method, in order to understand any role WC2 may have in facilitating the residue pathway in bringing an additional proton to the enzyme active site. In a single electronic state A{sup 2?}, a water wire was formed through which protons can be transported with a low free energy barrier. The remaining electronic states were shown, however, to be highly unfavorable to proton transport in WC2. A double amino acid substitution is predicted to obstruct proton transport in electronic state A{sup 2-} by closing a cavity that could otherwise fill with water near the proximal Fe of the active site.

  6. Stability of precipitate phases in Fe-rich Fe-Cr-Ni-Mo alloys

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Yang, Ying; Tan, Lizhen; Busby, Jeremy T

    2015-01-01

    Understanding the stability of precipitate phases in the Fe-rich Fe-Cr-Ni-Mo alloys is critical to the alloy design and application of Mo-containing Austenitic steels. Coupled with thermodynamic modeling, stability of the and phases in two Fe-Cr-Ni-Mo alloys were investigated at 1000, 850 and 700 C for different annealing time. The morphologies, compositions and crystal structures of the matrix and precipitate phases were carefully examined by Scanning Electron Microscopy, Electron Probe Microanalysis, X-ray diffraction and Transmission Electron Microscopy. Two key findings resulted from this work. One is that the phase is stable at high temperature and transformed into the phase at lowmoretemperature. The other is that both the and phases have large solubilites of Cr, Mo and Ni, among which the Mo solubility has a major role on the relative stability of the precipitate phases. The developed thermodynamic models were then applied to evaluating the Mo effect on the stability of precipitate phases in AISI 316 and NF709 alloys.less

  7. Thermal stability of intermetallic phases in Fe-rich Fe-Cr-Ni-Mo alloys

    SciTech Connect (OSTI)

    Yang, Ying; Tan, Lizhen; Busby, Jeremy T.

    2015-06-12

    Understanding the stability of precipitate phases in the Fe-rich Fe-Cr-Ni-Mo alloys is critical to the alloy design and application of Mo-containing Austenitic steels. Coupled with thermodynamic modeling, stability of the chi and Laves phases in two Fe-Cr-Ni-Mo alloys were investigated at 1000, 850 and 700 °C for different annealing time. The morphologies, compositions and crystal structures of the matrix and precipitate phases were carefully examined by Scanning Electron Microscopy, Electron Probe Microanalysis, X-ray diffraction and Transmission Electron Microscopy. The two key findings resulted from this work. One is that the chi phase is stable at high temperature and transformed into the Laves phase at low temperature. The other is that both the chi and Laves phases have large solubilites of Cr, Mo and Ni, among which the Mo solubility has a major role on the relative stability of the precipitate phases. The developed thermodynamic models were then applied to evaluating the Mo effect on the stability of precipitate phases in AISI 316 and NF709 alloys.

  8. Thermal stability of intermetallic phases in Fe-rich Fe-Cr-Ni-Mo alloys

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Yang, Ying; Tan, Lizhen; Busby, Jeremy T.

    2015-06-12

    Understanding the stability of precipitate phases in the Fe-rich Fe-Cr-Ni-Mo alloys is critical to the alloy design and application of Mo-containing Austenitic steels. Coupled with thermodynamic modeling, stability of the chi and Laves phases in two Fe-Cr-Ni-Mo alloys were investigated at 1000, 850 and 700 °C for different annealing time. The morphologies, compositions and crystal structures of the matrix and precipitate phases were carefully examined by Scanning Electron Microscopy, Electron Probe Microanalysis, X-ray diffraction and Transmission Electron Microscopy. The two key findings resulted from this work. One is that the chi phase is stable at high temperature and transformed intomore » the Laves phase at low temperature. The other is that both the chi and Laves phases have large solubilites of Cr, Mo and Ni, among which the Mo solubility has a major role on the relative stability of the precipitate phases. The developed thermodynamic models were then applied to evaluating the Mo effect on the stability of precipitate phases in AISI 316 and NF709 alloys.« less

  9. In situ observation of defect annihilation in Kr ion-irradiated bulk Fe/amorphous-Fe 2 Zr nanocomposite alloy

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Yu, K. Y.; Fan, Z.; Chen, Y.; Song, M.; Liu, Y.; Wang, H.; Kirk, M. A.; Li, M.; Zhang, X.

    2014-08-26

    Enhanced irradiation tolerance in crystalline multilayers has received significant attention lately. However, little is known on the irradiation response of crystal/amorphous nanolayers. We report on in situ Kr ion irradiation studies of a bulk Fe96Zr4 nanocomposite alloy. Irradiation resulted in amorphization of Fe2Zr and formed crystal/amorphous nanolayers. α-Fe layers exhibited drastically lower defect density and size than those in large α-Fe grains. In situ video revealed that mobile dislocation loops in α-Fe layers were confined by the crystal/amorphous interfaces and kept migrating to annihilate other defects. This study provides new insights on the design of irradiation-tolerant crystal/amorphous nanocomposites.

  10. Magnetism in Na-filled Fe-based skutterudites

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Xing, Guangzong; Fan, Xiaofeng; Zheng, Weitao; Ma, Yanming; Shi, Hongliang; Singh, David J.

    2015-06-01

    The interplay of superconductivity and magnetism is a subject of ongoing interest, stimulated most recently by the discovery of Fe-based superconductivity and the recognition that spin-fluctuations near a magnetic quantum critical point may provide an explanation for the superconductivity and the order parameter. We investigate magnetism in the Na filled Fe-based skutterudites using first principles calculations. NaFe4Sb12 is a known ferromagnet near a quantum critical point. We find a ferromagnetic metallic state for this compound driven by a Stoner type instability, consistent with prior work. In accord with prior work, the magnetization is overestimated, as expected for a material nearmore » an itinerant ferromagnetic quantum critical point. NaFe4P12 also shows a ferromagnetic instability at the density functional level, but this instability is much weaker than that of NaFe4Sb12, possibly placing it on the paramagnetic side of the quantum critical point. NaFe4As12 shows intermediate behavior. We also present results for skutterudite FeSb3, which is a metastable phase that has been reported in thin film form.« less

  11. Itinerant magnetism in metallic CuFe2Ge2

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Shanavas, K. V.; Singh, David J.; He, Ruihua

    2015-03-25

    Theoretical calculations are performed to understand the electronic structure and magnetic properties of CuFe2Ge2. The band structure reveals large electron density N(EF) at the Fermi level suggesting a strong itinerant character of magnetism. The Fermi surface is dominated by two dimensional sheet like structures, with potentially strong nesting between them. The magnetic ground state appears to be ferromagnetic along a and antiferromagnetic in other directions. The results show that CuFe2Ge2 is an antiferromagnetic metal, with similarities to the Fe-based superconductors; such as magnetism with substantial itinerant character and coupling between magnetic order and electrons at the Fermi energy.

  12. Accelerated decarburization of Fe-C metal alloys

    DOE Patents [OSTI]

    Pal, U.B.; Sadoway, D.R.

    1997-05-27

    A process is described for improving the rate of metal production and FeO utilization in a steelmaking process or a process combining iron-making and steelmaking in a single reactor that uses or generates Fe-C metal alloy droplets submerged in an FeO-containing slag. The process involves discharging a charge build-up (electron accumulation) in the slag at the slag-metal alloy interface by means of an electron conductor connected between the metal alloy droplets and a gas at a gas-slag interface, said gas having an oxygen partial pressure of at least about 0.01 atmosphere. 2 figs.

  13. Accelerated decarburization of Fe-C metal alloys

    DOE Patents [OSTI]

    Pal, Uday B.; Sadoway, Donald R.

    1997-01-01

    A process for improving the rate of metal production and FeO utilization in a steelmaking process or a process combining iron-making and steelmaking in a single reactor that uses or generates Fe-C metal alloy droplets submerged in an FeO-containing slag. The process involves discharging a charge build-up (electron accumulation) in the slag at the slag-metal alloy interface by means of an electron conductor connected between the metal alloy droplets and a gas at a gas-slag interface, said gas having an oxygen partial pressure of at least about 0.01 atmosphere.

  14. Synthesis and properties of titanomagnetite (Fe3-xTixO4) nanoparticles: A tunable solid-state Fe(II/III) redox system

    SciTech Connect (OSTI)

    Pearce, Carolyn I.; Qafoku, Odeta; Liu, Juan; Arenholz, Elke; Heald, Steve M.; Kukkadapu, Ravi K.; Gorski, Christopher A.; Henderson, C. Michael B.; Rosso, Kevin M.

    2012-12-01

    Titanomagnetite (Fe3-xTixO4) nanoparticles were synthesized by room temperature aqueous precipitation, in which Ti(IV) replaces Fe(III) and is charge compensated by conversion of Fe(III) to Fe(II) in the unit cell. A comprehensive suite of tools was used to probe composition, structure, and magnetic properties down to site-occupancy level, emphasizing distribution and accessibility of Fe(II) as a function of x. Synthesis of nanoparticles in the range 0 ? x ? 0.6 was attempted; Ti, total Fe and Fe(II) content were verified by chemical analysis. TEM indicated homogeneous spherical 10 12 nm particles. ?-XRD and Mssbauer spectroscopy on anoxic aqueous suspensions verified the inverse spinel structure and Ti(IV) incorporation in the unit cell up to x ? 0.38, based on Fe(II)/Fe(III) ratio deduced from the unit cell edge and Mssbauer spectra. Nanoparticles with a higher value of x possessed a minor amorphous secondary Fe(II)/Ti(IV) phase. XANES/EXAFS indicated Ti(IV) incorporation in the octahedral sublattice (B-site) and proportional increases in Fe(II)/Fe(III) ratio. XA/XMCD indicate these increases arise from increasing B-site Fe(II), and that these charge-balancing equivalents segregate to those B-sites near particle surfaces. Dissolution studies showed that this segregation persists after release of Fe(II) into solution, in amounts systematically proportional to x and thus the Fe(II)/Fe(III) ratio. A mechanistic reaction model was developed entailing mobile B-site Fe(II) supplying a highly interactive surface phase that undergoes interfacial electron transfer with oxidants in solution, sustained by outward Fe(II) migration from particle interiors and concurrent inward migration of charge-balancing cationic vacancies in a ratio of 3:1.

  15. ELECTRON-ION RECOMBINATION OF Fe XII FORMING Fe XI: LABORATORY MEASUREMENTS AND THEORETICAL CALCULATIONS

    SciTech Connect (OSTI)

    Novotny, O.; Hahn, M.; Lestinsky, M.; Savin, D. W.; Badnell, N. R.; Bernhardt, D.; Mueller, A.; Schippers, S.; Grieser, M.; Krantz, C.; Repnow, R.; Wolf, A.

    2012-07-01

    We have measured electron-ion recombination for Fe XII forming Fe XI using a merged-beam configuration at the heavy-ion storage ring TSR located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. The measured merged-beam recombination rate coefficient (MBRRC) for collision energies from 0 to 1500 eV is presented. This work uses a new method for determining the absolute MBRRC based on a comparison of the ion beam decay rate with and without the electron beam on. For energies below 75 eV, the spectrum is dominated by dielectronic recombination (DR) resonances associated with 3s {yields} 3p and 3p {yields} 3d core excitations. At higher energies, we observe contributions from 3 {yields} N' and 2 {yields} N' core excitation DR. We compare our experimental results to state-of-the-art multi-configuration Breit-Pauli (MCBP) calculations and find significant differences, both in resonance energies and strengths. We have extracted the DR contributions from the measured MBRRC data and transformed them into a plasma recombination rate coefficient (PRRC) for temperatures in the range of 10{sup 3}-10{sup 7} K. We show that the previously recommended DR data for Fe XII significantly underestimate the PRRC at temperatures relevant for both photoionized plasmas (PPs) and collisionally ionized plasmas (CPs). This is contrasted with our MCBP PRRC results, which agree with the experiment to within 30% at PP temperatures and even better at CP temperatures. We find this agreement despite the disagreement shown by the detailed comparison between our MCBP and experimental MBRRC results. Last, we present a simple parameterized form of the experimentally derived PRRC for easy use in astrophysical modeling codes.

  16. Magneto-optical characterizations of FeTe???Se??? thin...

    Office of Scientific and Technical Information (OSTI)

    distributed in the two thin films. Compared with bulk crystals, FeTeSe thin film demonstrates not only higher Tc, but also much larger Jc, which is attractive...

  17. Clean Energy- FE Dkt No. 14-54-LNG (FTA)

    Broader source: Energy.gov [DOE]

    The Office of Fossil Energy (FE) of the Department of Energy (DOE) gives notice of receipt of an application filed on March 18, 2014, by Clean Energy, requesting blanket authorization to engage in...

  18. DE-FE0012829 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Test of a Nanoporous, Super-hydrophobic Membrane Contactor Process for Post-combustion CO2 Capture Project No.: DE-FE0012829 GTI is building a 1 MWe equivalent pilot-scale CO2...

  19. fe0013531-Oregon-State | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Assessing the Response of Methane Hydrates to Environmental Change at the Svalbad Continental Margin Last Reviewed 1242015 DE-FE0013531 Goal The project goal is to study the...

  20. de-fe0012870 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SORBENT BASED POST-COMBUSTION CO2 SLIPSTREAM TESTING Project No.: DE-FE0012870 TDA Research Inc. is conducting a pilot-scale demonstration to evaluate its sorbent-based CO2 capture...

  1. de-fe0013303 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ion Advanced Solvent CO2 Capture Pilot Project Project No.: DE-FE0013303 ION Engineering is conducting small pilot-scale ( 0.7 MW) testing of an advanced CO2 capture solvent...

  2. Santa Fe Springs, California: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Santa Fe Springs is a city in Los Angeles County, California. It falls under California's...

  3. Santa Fe, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Santa Fe is a city in Galveston County, Texas. It falls under Texas's 22nd congressional...

  4. Eldorado at Santa Fe, New Mexico: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    at Santa Fe, New Mexico: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 35.526365, -105.93424 Show Map Loading map... "minzoom":false,"mapping...

  5. Startup Funding Forum on October 18 in Santa Fe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2015-Jan. 2016 all issues All Issues submit Startup Funding Forum on October 18 in Santa Fe Coronado Ventures Forum will present "Early-Stage Fundraising Options for Founders...

  6. Rancho Santa Fe, California: Energy Resources | Open Energy Informatio...

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Rancho Santa Fe is a census-designated place in San Diego County, California.1 Registered Energy...

  7. FE FY 2016 BUDGET REQUEST PRESENTATION | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    6budgetrollout 2-2-15.pdf More Documents & Publications FE FY 2015 Budget Request Presentation Fossil Energy FY 2013 Budget-in-Brief Fossil Energy FY 2015 Budget in Brief...

  8. de-fe0013064 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Robust and Energy Efficient Dual-Stage Membrane-Based Process for Enhanced CO2 Capture Project No.: DE-FE0013064 Media and Process Technology, Inc is developing a process that...

  9. DE-FE0013118 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bench-Scale Development of a Hybrid Membrane-Absorption CO2 Capture Process Project No.: DE-FE0013118 Membrane Technology and Research (MTR) is developing and evaluating a hybrid...

  10. The effect of Fe spin crossovers on its partitioning behavior...

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Search Results Journal Article: The effect of Fe spin crossovers on its partitioning behavior and oxidation state in a pyrolitic Earth;s lower mantle system ...

  11. Duo at Santa Fe's Monte del Sol Charter

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Duo at Santa Fe's Monte del Sol Charter School takes top award in 25th New Mexico Supercomputing Challenge April 21, 2015 Using nanotechnology robots to kill cancer cells LOS...

  12. Fe Atomic Data for Non-equilibrium Ionization Plasmas (Conference) |

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Fe Atomic Data for Non-equilibrium Ionization Plasmas Citation Details In-Document Search Title: Fe Atomic Data for Non-equilibrium Ionization Plasmas No abstract prepared. Authors: Eriksen, Kristoffer A. [1] ; Fontes, Christopher J. [1] ; Colgan, James P. [1] ; Zhang, Honglin [1] ; Hungerford, Aimee L. [1] ; Fryer, Christopher L. [1] ; Hughes, John P. [2] ; Smith, Randall K. [3] ; Badenes, Carles [4] + Show Author Affiliations Los Alamos National Laboratory Rutgers

  13. DE-FE0010180 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Gas Hydrate Dynamics on the Alaskan Beaufort Continental Slope: Modeling and Field Characterization Last Reviewed 11/27/2015 DE-FE0010180/DE-FE0005806 Goal The goal of this research is to assess the contemporary state of the upper continental slope along U.S. coastal margins to determine if gas hydrates are in equilibrium with present-day climate conditions Performers Southern Methodist University (SMU) - Dallas, TX Oregon State University (OSU) - Corvallis, OR US Geological Survey (USGS) -

  14. Fe Atomic Data for Non-equilibrium Ionization Plasmas (Conference) |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SciTech Connect Fe Atomic Data for Non-equilibrium Ionization Plasmas Citation Details In-Document Search Title: Fe Atomic Data for Non-equilibrium Ionization Plasmas No abstract prepared. Authors: Eriksen, Kristoffer A. [1] ; Fontes, Christopher J. [1] ; Colgan, James P. [1] ; Zhang, Honglin [1] ; Hungerford, Aimee L. [1] ; Fryer, Christopher L. [1] ; Hughes, John P. [2] ; Smith, Randall K. [3] ; Badenes, Carles [4] + Show Author Affiliations Los Alamos National Laboratory Rutgers

  15. 15.03.03 RH Fe Elecrolyte - JCAP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Effects of Fe Electrolyte Composition on Ni ( OH ) 2/NiOOH Structure and Oxygen Evolution Activity Klaus, S., Cai, Y., Louie, M. W., Trotochaud, L. & Bell, A. T. Effects of Fe Electrolyte Impurities on Ni ( OH ) 2/NiOOH Structure and Oxygen Evolution Activity. The Journal of Physical Chemistry C, 119 ( 13), 7243-7254, DOI: 10.1021/ acs . jpcc . 5b00105 (2015). Scientific Achievement Electrochemical characterization, in situ Raman spectroscopy, and quartz crystal microbalance measurements

  16. Voltage modulation of propagating spin waves in Fe

    SciTech Connect (OSTI)

    Nawaoka, Kohei; Shiota, Yoichi; Miwa, Shinji; Tamura, Eiiti; Tomita, Hiroyuki; Mizuochi, Norikazu; Shinjo, Teruya; Suzuki, Yoshishige

    2015-05-07

    The effect of a voltage application on propagating spin waves in single-crystalline 5?nm-Fe layer was investigated. Two micro-sized antennas were employed to excite and detect the propagating spin waves. The voltage effect was characterized using AC lock-in technique. As a result, the resonant field of the magnetostatic surface wave in the Fe was clearly modulated by the voltage application. The modulation is attributed to the voltage induced magnetic anisotropy change in ferromagnetic metals.

  17. NNMCAB Board Minutes: December 2014 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    4 Santa Fe NNMCAB Board Minutes: December 2014 Santa Fe At This Meeting: Update from Liaisons (DOE, NNSA) Presentation DOE HQ, Transition of Environmental Management Clean-up at LANL, Jack Craig Presentation RCLC, Perspectives from the Regional Coalition of LANL Communities, Darien Cabral PDF icon Board Minutes - December 10, 2014 More Documents & Publications NNMCAB Board Minutes: January 2015 Pojoaque NNMCAB Board Minutes: November 2013 Ohkay Owingeh NNMCAB Board Minutes: September 2013

  18. NNMCAB Board Minutes: January 2014 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    4 Santa Fe NNMCAB Board Minutes: January 2014 Santa Fe At This Meeting: Upcoming Public, Hearings Comment Periods, and Permits Update from Liaisons (LANL, DOE) Presentation DOE/LANL, Material Disposal Area G, Pete Maggiore, Jeff Mousseau PDF icon Board Minutes - January 29, 2014 More Documents & Publications NNMCAB Board Minutes: March 2014 Albuquerque NNMCAB Board Minutes: March 2013 Albuquerque NNMCAB Board Minutes: November 2013 Ohkay Owingeh

  19. NNMCAB Board Minutes: July 2008 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    8 Santa Fe NNMCAB Board Minutes: July 2008 Santa Fe At This Meeting: Consideration of Letter to Secretary Respoli Bylaw Amendments Subcommittee Reports Consideration and Action on Recommendation 2008-01 "Expedite Planned Change Request for Shielded Containers" Consideration and Action on Recommendation 2008-02 "Enhanced Organization and Training for LANL in Interfacing with Regulators Consideration and Action on Recommendation 2008-03 "EPA Storm Water Discharge Permit"

  20. NNMCAB Board Minutes: July 2014 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    4 Santa Fe NNMCAB Board Minutes: July 2014 Santa Fe At This Meeting: Consideration and Action on Recommendation 2014-02 "WIPP Waste Disposal to Remain Continually Operational" Election of Officers for FY'15 Governor Aguilar on San Ildefonso Environmental Issues Update from Liaisons (LANL, DOE, NMED) Presentation DOE, LANL Technical Area 21, David Rhodes PDF icon Board Minutes - July 30, 2014 More Documents & Publications NNMCAB Board Minutes: September 2014 Taos NNMCAB Board

  1. NNMCAB Board Minutes: March 2011 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    1 Santa Fe NNMCAB Board Minutes: March 2011 Santa Fe At This Meeting: Update on NNMCAB Sponsored Forum "Surface and Groundwater Quality at LANL" Report on Waste Management Conference 2011 Consideration and Action on Recommendation 2011-04 "Achieving 2005 Consent Order Milestones in the Next Four Years" Presentation DOE, FY'2012 DOE Budget, Ed Worth, Lee Bishop Presentation LANL, Independence of Analytical Labs. Nita Patel PDF icon Board Minutes - March 30, 2011 More Documents

  2. NNMCAB Board Minutes: May 2009 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    9 Santa Fe NNMCAB Board Minutes: May 2009 Santa Fe At This Meeting: Subcommittee Reports Consideration and Action on Recommendation 2009-02 Consideration and Action on Recommendation 2009-03 Consideration and Action on Recommendation 2009-04 Consideration and Action on Recommendation 2009-05 Consideration and Action on Recommendation 2009-06 Presentation Eight Northern Pueblos, Tribal Youth Summer Camp 2008, Jackie Gutierrez Presentation DOE, Implementation of NNMCAB Recommendations, Jeff

  3. NNMCAB Board Minutes: May 2012 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    2 Santa Fe NNMCAB Board Minutes: May 2012 Santa Fe At This Meeting: Report on Spring EM SSAB Meeting NNMCAB Written Reports Consideration and Action on EM SSAB Chairs Letters Report on NNMCAB Letter to Secretary Huizenga Presentation NMED, RCRA The LANL Hazardous Waste Facility Permit and Consent Order, John Kieling Presentation DOE, State of the Laboratory, Ed Worth, Bruch Schappell Presentation DOE, 3706 TRU Waste Campaign Update, Lee Bishop PDF icon Board Minutes - May 30, 2012 More Documents

  4. NNMCAB Board Minutes: November 2008 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    8 Santa Fe NNMCAB Board Minutes: November 2008 Santa Fe At This Meeting: NNMCAB Written Reports NMED Update on Consent Order Consideration and Action on Recommendation 2008-10 "Independent Review of MDA-G Corrective Measures" Consideration and Action on Recommendation 2008-11 "Outfall into Sandia Canyon" Update from Liaisons (NMED, EPA, DOE, LANL) Presentation LANL, Environmental Surveillance Report PDF icon Board Minutes - November 19, 2008 More Documents & Publications

  5. NNMCAB Board Minutes: September 2008 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    08 Santa Fe NNMCAB Board Minutes: September 2008 Santa Fe At This Meeting: Election of Officers for FY'2009 Consideration and Action NNMCAB Bylaws Amendments Consideration and Action on Recommendation 2008-04 "Budget Planning and Priorities" Consideration and Action on Recommendation 2008-07 "Enhanced Organization and Training for LANL" Consideration and Action on Recommendation 2008-08 "Improve Documentation for Monitoring Wells" Consideration and Action on

  6. Demonstration of Security Benefits of Renewable Generation at FE Warren Air Force Base

    SciTech Connect (OSTI)

    Warwick, William M.; Myers, Kurt; Seifert, Gary

    2010-12-31

    Report detailing field demonstration of security benefits of renewable generation at FE Warren Air Force Base.

  7. Uranium(VI) reduction by nanoscale zero-valent iron in anoxic batch systems: The role of Fe(II) and Fe(III)

    SciTech Connect (OSTI)

    Yan, Sen; Chen, Yongheng; Xiang, Wu; Bao, Zhengyu; Liu, Chongxuan; Deng, Baolin

    2014-12-01

    The role of Fe(II) and Fe(III) on U(VI) reduction by nanoscale zerovalent iron (nanoFe0) was investigated using two iron chelators 1,10-phenanthroline and triethanolamine (TEA) under a CO2-free anoxic condition. The results showed U(VI) reduction was strongly inhibited by 1,10-phenanthroline and TEA in a pH range from 6.92 to 9.03. For instance, at pH 6.92 the observed U(VI) reduction rates decreased by 80.7% and 82.3% in the presence of 1,10-phenanthroline and TEA, respectively. The inhibition was attributed to the formation of stable complexes between 1,10-phenanthroline and Fe(II) or TEA and Fe(III). In the absence of iron chelators, U(VI) reduction can be enhanced by surface-bound Fe(II) on nanoFe0. Our results suggested that Fe(III) and Fe(II) probably acted as an electron shuttle to mediate the transfer of electrons from nanoFe0 to U(VI), therefore a combined system with Fe(II), Fe(III) and nanoFe0 can facilitate the U(VI) reductive immobilization in the contaminated groundwater.

  8. Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution

    SciTech Connect (OSTI)

    Yiu, Yuen; Bonfa, Pietro; Sanna, Samuele; De Renzi, Roberto; Caretta, Pietro; McGuire, Michael A; Huq, Ashfia; Nagler, Stephen E

    2014-01-01

    Neutron diffraction and muon spin relaxation measurements are used to obtain a detailed phase diagram of PrFe1{xRuxAsO. The isoelectronic substitution of Ru for Fe acts eectively as spin dilution, suppressing both the structural and magnetic phase transitions. The temperature, TS, of the tetragonal-orthorhombic structural phase transition decreases gradually as a function of x. Slightly below TS coherent precessions of the muon spin are observed corresponding to static magnetism, possibly re ecting a signicant magneto-elastic coupling in the FeAs layers. Short range order in both the Fe and Pr moments persists for higher levels of x. The static magnetic moments disappear at a concentration coincident with that expected for percolation of the J1 - J2 square lattice model.

  9. Mssbauer investigations of hyperfine interactions features of {sup 57}Fe nuclei in BiFeO{sub 3} ferrite

    SciTech Connect (OSTI)

    Sobolev, Alexey, E-mail: salex12@rambler.ru; Presniakov, Igor, E-mail: salex12@rambler.ru; Rusakov, Vyacheslav, E-mail: salex12@rambler.ru; Matsnev, Mikhail; Gorchakov, Dmitry; Glazkova, Iana [Lomonosov Moscow State University, 119991, Moscow (Russian Federation); Belik, Alexey [International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044 (Japan)

    2014-10-27

    New results of {sup 57}Fe Mssbauer studies on BiFeO{sub 3} powder sample performed at various temperatures above and below magnetic phase transitions point T{sub N} ? 640K are reported. We have performed self-consistent calculations of the lattice contributions to the EFG tensor, taking into account dipole moments of the O{sup 2?} and Bi{sup 3+} ions. Low-temperature {sup 57}Fe Mssbauer spectra recorded at T < T{sub N} were analyzed assuming an anharmonic cycloidal modulation of the Fe{sup 3+} magnetic moments. The cycloidal modulation of the iron spin was described with the elliptic Jacobi function sn[(4K(m)/?)x,m]. The good fit of the experimental spectra was obtained for the anharmonicity m = 0.44 0.04 (T = 4.9K) resulting from the easy-axis magnetic anisotropy.

  10. Campbell penetration depth in Fe-based superconductors

    SciTech Connect (OSTI)

    Prommapan, Plegchart

    2011-08-15

    A 'true' critical current density, j{sub c}, as opposite to commonly measured relaxed persistent (Bean) current, j{sub B}, was extracted from the Campbell penetration depth, {lambda}{sub c}(T,H) measured in single crystals of LiFeAs, and optimally electron-doped Ba(Fe{sub 0.954}Ni{sub 0.046}){sub 2}As{sub 2} (FeNi122). In LiFeAs, the effective pinning potential is nonparabolic, which follows from the magnetic field - dependent Labusch parameter {alpha}. At the equilibrium (upon field - cooling), {alpha}(H) is non-monotonic, but it is monotonic at a finite gradient of the vortex density. This behavior leads to a faster magnetic relaxation at the lower fields and provides a natural dynamic explanation for the fishtail (second peak) effect. We also find the evidence for strong pinning at the lower fields.The inferred field dependence of the pinning potential is consistent with the evolution from strong pinning, through collective pinning, and eventually to a disordered vortex lattice. The value of j{sub c}(2 K) {approx_equal} 1.22 x 10{sup 6} A/cm{sup 2} provide an upper estimate of the current carrying capability of LiFeAs. Overall, vortex behavior of almost isotropic, fully-gapped LiFeAs is very similar to highly anisotropic d-wave cuprate superconductors, the similarity that requires further studies in order to understand unconventional superconductivity in cuprates and pnictides. In addition to LiFeAs, we also report the magnetic penetration depth in BaFe{sub 2}As{sub 2} based superconductors including irradiation of FeNi122. In unirradiated FeNi122, the maximum critical current value is, j{sub c}(2K) {approx_equal} 3.3 x 10{sup 6} A/cm{sup 2}. The magnetic-dependent feature was observed near the transition temperature in FeTe{sub 0.53}Se{sub 0.47} and irradiated FeNi122. Because of this feature, further studies are required in order to properly calibrate the Campbell penetration depth. Finally, we detected the crossing between the magnetic penetration depth and London penetration depth in optimally hold-doped Ba{sub 0.6}K{sub 0.4}Fe{sub 2}As{sub 2} (BaK122) and isovalent doped BaFe{sub 2}(As{sub 0.7}P{sub 0.3}){sub 2} (BaP122). These phenomena probably coincide with anomalous Meissner effect reported in pnicitde superconductors [Prozorov et al. (2010b)] however more studies are needed in order to clarify this.

  11. Effect of Ag addition to L1{sub 0} FePt and L1{sub 0} FePd films grown by molecular beam epitaxy

    SciTech Connect (OSTI)

    Tokuoka, Y.; Seto, Y.; Kato, T.; Iwata, S.

    2014-05-07

    L1{sub 0} ordered FePt-Ag (5?nm) and FePd-Ag (5?nm) films were grown on MgO (001) substrate at temperatures of 250400?C by using molecular beam epitaxy method, and their crystal and surface structures, perpendicular magnetic anisotropies and Curie temperatures were investigated. In the case of FePt-Ag, Ag addition with the amount of 1020 at.?% was effective to promote L1{sub 0} ordering and granular growth, resulting in the increase of the perpendicular magnetic anisotropy and coercivity of the FePt-Ag films. On the other hand, in the case of FePd-Ag, Ag addition changed the surface morphology from island to continuous film associated with the reductions of its coercivity and perpendicular anisotropy. The variations of lattice constants and Curie temperature with Ag addition were significantly different between FePt-Ag and FePd-Ag. For FePd-Ag, the c and a axes lattice spacings and Curie temperature gradually changed with increasing Ag content, while they unchanged for FePt-Ag. These results suggest the possibility of the formation of FePdAg alloy in FePd-Ag, while Ag segregation in FePt-Ag.

  12. Dual and Triple Ion-Beam Irradiations of Fe, Fe(Cr) and Fe(Cr)-ODS Final Report: IAEA SMoRE CRP

    SciTech Connect (OSTI)

    Fluss, M J; Hsiung, L L; Marian, J

    2011-11-20

    Structures of nanoparticles in Fe-16Cr-4.5Al-0.3Ti-2W-0.37Y2O3 (K3) and Fe-20Cr-4.5Al-0.34Ti-0.5Y2O3 (MA956) oxide dispersion strengthened (ODS) ferritic steels produced by mechanical alloying (MA) and followed by hot extrusion have been studied using high-resolution transmission electron microscopy (HRTEM) techniques to gain insight about the formation mechanism of nanoparticles in MA/ODS steels. The observations of Y-Al-O complex-oxide nanoparticles in both ODS steels imply that decomposition of Y2O3 in association with internal oxidation of Al occurred during mechanical alloying. While the majority of oxide nanoparticles formed in both steels is Y4Al2O9, a few oxide particles of YAlO3 are also occasionally observed. These results reveal that Ti (0.3 wt %) plays an insignificant role in forming oxide nanoparticles in the presence of Al (4.5 wt %). HRTEM observations of crystalline nanoparticles larger than {approx}2 nm and amorphous or disordered cluster domains smaller than {approx}2 nm provide an insight into the formation mechanism of oxide nanoparticle in MA/ODS steels, which we believe from our observations involves a solid-state amorphous precursor followed by recrystallization. Dual ion-beam irradiations using He{sup +} + Fe{sup +8} ions were employed to gain more detailed insight about the role of nanoparticles in suppressing radiation-induced swelling. This is elaborated through TEM examinations of cavity distributions in ion-irradiated Fe-14Cr and K3-ODS ferritic steels. HRTEM observations of helium-filled cavities (helium bubbles) preferably trapped at nanoscale oxide particles and clusters in ion-irradiated K3-ODS are presented. Finally, we describe the results from triple ion-beam irradiations using H{sup +} + He{sup +} + Fe{sup +8} ions to emulate fusion first wall radiation effects. Preliminary work is reported that confirms the existence of significant hydrogen synergistic effects described earlier by Tanaka et al., for Fe(Cr) and by Wakai et al., for F82H reduced activation ferritic martensitic (RAF/M) steel. These previous results combined with our data suggest a complex new 'catalytic' mechanism whereby H interacts with the steady state population of defects and the embryonic cavities so as to accelerated cavity (void) growth in both Fe(Cr) and under special conditions in ODS steels.

  13. Mechanically-induced disorder in CaFe2As2: A 57Fe Mössbauer study

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ma, Xiaoming; Ran, Sheng; Canfield, Paul C.; Bud'ko, Sergey L.

    2015-10-17

    57Fe Mössbauer spectroscopy was used to perform a microscopic study on the extremely pressure and strain sensitive compound, CaFe2As2, with different degrees of strain introduced by grinding and annealing. At the base temperature, in the antiferromagnetic/orthorhombic phase, compared to a sharp sextet Mössbauer spectrum of single crystal CaFe2As2, which is taken as an un-strained sample, an obviously broadened sextet and an extra doublet were observed for ground CaFe2As2 powders with different degrees of strain. The Mössbauer results suggest that the magnetic phase transition of CaFe2As2 can be inhomogeneously suppressed by the grinding induced strain to such an extent that themore » antiferromagnetic order in parts of the grains forming the powdered sample remain absent all the way down to 4.6 K. However, strain has almost no effect on the temperature dependent hyperfine magnetic field in the grains with magnetic order. Additional electronic and asymmetry information was obtained from the isomer shift and quadrupole splitting. Similar isomer shift values in the magnetic phase for samples with different degrees of strain, indicate that the stain does not bring any significant variation of the electronic density at 57Fe nucleus position. As a result, the absolute values of quadrupole shift in the magnetic phase decrease and approach zero with increasing degrees of strain, indicating that the strain reduces the average lattice asymmetry at Fe atom position.« less

  14. Cladding burst behavior of Fe-based alloys under LOCA

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Terrani, Kurt A.; Dryepondt, Sebastien N.; Pint, Bruce A.; Massey, Caleb P.

    2015-12-17

    Burst behavior of austenitic and ferritic Fe-based alloy tubes has been examined under a simulated large break loss of coolant accident. Specifically, type 304 stainless steel (304SS) and oxidation resistant FeCrAl tubes were studied alongside Zircaloy-2 and Zircaloy-4 that are considered reference fuel cladding materials. Following the burst test, characterization of the cladding materials was carried out to gain insights regarding the integral burst behavior. Given the widespread availability of a comprehensive set of thermo-mechanical data at elevated temperatures for 304SS, a modeling framework was implemented to simulate the various processes that affect burst behavior in this Fe-based alloy. Themore » most important conclusion is that cladding ballooning due to creep is negligible for Fe-based alloys. Thus, unlike Zr-based alloys, cladding cross-sectional area remains largely unchanged up to the point of burst. Furthermore, for a given rod internal pressure, the temperature onset of burst in Fe-based alloys appears to be simply a function of the alloy's ultimate tensile strength, particularly at high rod internal pressures.« less

  15. Microporous Separators for Fe/V Redox Flow Batteries

    SciTech Connect (OSTI)

    Wei, Xiaoliang; Li, Liyu; Luo, Qingtao; Nie, Zimin; Wang, Wei; Li, Bin; Xia, Guanguang; Miller, Eric; Chambers, Jeff; Yang, Zhenguo

    2012-06-28

    The Fe/V redox flow battery has demonstrated promising performance that is advantageous over other redox flow battery systems. The less oxidative nature of the Fe(III) species enables use of hydrocarbon - based ion exchange membranes or separators. Daramic(reg. sign) microporous polyethylene separators were tested on Fe/V flow cells using the sulphuric/chloric mixed acid - supporting electrolytes. Among them, Daramic(reg. sign) C exhibited good flow cell cycling performance with satisfactory repeatability over a broad temperature range of 5 - 50 degrees C. Energy efficiency (EE) of C remains above 67% at current densities of 50 - 80 cm{sup -2} in the temperature range from room temperature to 50 degrees C. The capacity decay problem could be circumvented through hydraulic pressure balancing by applying different pump rates to the positive and negative electrolytes. Stable capacity and energy were obtained over 40 cycles at room temperature and 40 degrees C. These results manifest that the extremely low-cost separators ($10/cm2) are applicable in the Fe/V flow battery system at an acceptable sacrifice of energy efficiency. This stands for a remarkable breakthrough in significant reduction of the capital cost of the Fe/V flow battery system, and is promising to promote its market penetration in grid stabilization and renewable integration.

  16. Single-crystal epitaxial thin films of SrFeO{sub 2} with FeO{sub 2} 'infinite layers'

    SciTech Connect (OSTI)

    Inoue, Satoru; Kawai, Masanori; Shimakawa, Yuichi [Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011 (Japan); Mizumaki, Masaichiro; Kawamura, Naomi [Japan Synchrotron Radiation Research Institute/SPring-8, Sayo, Hyogo 679-5198 (Japan); Watanabe, Takashi; Tsujimoto, Yoshihiro; Kageyama, Hiroshi; Yoshimura, Kazuyoshi [Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502 (Japan)

    2008-04-21

    Single-crystal thin films of SrFeO{sub 2}, which is an oxygen-deficient perovskite with ''infinite layers'' of Fe{sup 2+}O{sub 2}, were prepared by using CaH{sub 2} for low-temperature reduction of epitaxial SrFeO{sub 2.5} single-crystal films deposited on KTaO{sub 3} substrates. This reduction process, removing oxygen ions from the perovskite structure framework and causing rearrangements of oxygen ions, topotactically transforms the brownmillerite SrFeO{sub 2.5} to the c-axis oriented SrFeO{sub 2}.

  17. Spin-Lattice Coupling and Superconductivity in Fe Pnictides

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Egami, T.; Fine, B. V.; Parshall, D.; Subedi, A.; Singh, D. J.

    2010-01-01

    We consider strong spin-lattice and spin-phonon coupling in iron pnictides and discuss its implications on superconductivity. Strong magneto-volume effect in iron compounds has long been known as the Invar effect. Fe pnictides also exhibit this effect, reflected in particular on the dependence of the magnetic moment on the atomic volume of Fe defined by the positions of the nearest neighbor atoms. Through the phenomenological Landau theory, developed on the basis of the calculations by the density functional theory (DFT) and the experimental results, we quantify the strength of the spin-lattice interaction as it relates to the Stoner criterion for themore »onset of magnetism. We suggest that the coupling between electrons and phonons through the spin channel may be sufficiently strong to be an important part of the superconductivity mechanism in Fe pnictides.« less

  18. Electronic and magnetic properties of Si substituted Fe3Ge

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Shanavas, Kavungal Veedu; McGuire, Michael A.; Parker, David S.

    2015-09-23

    Using first principles calculations we studied the effect of Si substitution in the hexagonal Fe3Ge. We find the low temperature magnetic anisotropy in this system to be planar and originating mostly from the spin-orbit coupling in Fe-d states. Reduction of the unitcell volume reduces the in-plane magnetic anisotropy, eventually turning it positive which reorients the magnetic moments to the axial direction. We find that substituting Ge with the smaller Si ions also reduces the anisotropy, potentially enhancing the region of stability of the axial magnetization, which is beneficial for magnetic applications. Thus our experimental measurements on samples of Fe3Ge1–xSix confirmmore » these predictions and show that substitution of about 6% of the Ge with Si increases by approximately 35 K the temperature range over which anisotropy is uniaxial.« less

  19. Bimetallic Fe-Ni Oxygen Carriers for Chemical Looping Combustion

    SciTech Connect (OSTI)

    Bhavsar, Saurabh; Veser, Goetz

    2013-11-06

    The relative abundance, low cost, and low toxicity of iron make Fe-based oxygen carriers of great interest for chemical looping combustion (CLC), an emerging technology for clean and efficient combustion of fossil and renewable fuels. However, Fe also shows much lower reactivity than other metals (such as Ni and Cu). Here, we demonstrate strong improvement of Fe-based carriers by alloying the metal phase with Ni. Through a combination of carrier synthesis and characterization with thermogravimetric and fixed-bed reactor studies, we demonstrate that the addition of Ni results in a significant enhancement in activity as well as an increase in selectivity for total oxidation. Furthermore, comparing alumina and ceria as support materials highlights the fact that reducible supports can result in a strong increase in oxygen carrier utilization.

  20. Constructing hierarchical interfaces: TiO2-supported PtFe-FeOx nanowires for room temperature CO oxidation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zhu, Huiyuan; Wu, Zili; Dong, Su; Veith, Gabriel M.; Lu, Hanfeng; Zhang, Pengfei; Chai, Song -Hai; Dai, Sheng

    2015-08-05

    This is a report of a facile approach to constructing catalytic active hierarchical interfaces in one-dimensional (1D) nanostructure, exemplified by the synthesis of TiO2-supported PtFe–FeOx nanowires (NWs). The hierarchical interface, constituting atomic level interactions between PtFe and FeOx within each NW and the interactions between NWs and support (TiO2), enables CO oxidation with 100% conversion at room temperature. We identify the role of the two interfaces by probing the CO oxidation reaction with isotopic labeling experiments. Both the oxygen atoms (Os) in FeOx and TiO2 participate in the initial CO oxidation, facilitating the reaction through a redox pathway. Moreover, themore » intact 1D structure leads to the high stability of the catalyst. After 30 h in the reaction stream, the PtFe–FeOx/TiO2 catalyst exhibits no activity decay. These results provide a general approach and new insights into the construction of hierarchical interfaces for advanced catalysis.« less

  1. Structural and Electrochemical Characterization of Pure LiFePO 4 and Nanocomposite C- LiFePO 4 Cathodes for Lithium Ion Rechargeable Batteries

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kumar, Arun; Thomas, R.; Karan, N. K.; Saavedra-Arias, J. J.; Singh, M. K.; Majumder, S. B.; Tomar, M. S.; Katiyar, R. S.

    2009-01-01

    Pure limore » thium iron phosphate ( LiFePO 4 ) and carbon-coated LiFePO 4 (C- LiFePO 4 ) cathode materials were synthesized for Li-ion batteries. Structural and electrochemical properties of these materials were compared. X-ray diffraction revealed orthorhombic olivine structure. Micro-Raman scattering analysis indicates amorphous carbon, and TEM micrographs show carbon coating on LiFePO 4 particles. Ex situ Raman spectrum of C- LiFePO 4 at various stages of charging and discharging showed reversibility upon electrochemical cycling. The cyclic voltammograms of LiFePO 4 and C- LiFePO 4 showed only a pair of peaks corresponding to the anodic and cathodic reactions. The first discharge capacities were 63, 43, and 13 mAh/g for C/5, C/3, and C/2, respectively for LiFePO 4 where as in case of C- LiFePO 4 that were 163, 144, 118, and 70 mAh/g for C/5, C/3, C/2, and 1C, respectively. The capacity retention of pure LiFePO 4 was 69% after 25 cycles where as that of C- LiFePO 4 was around 97% after 50 cycles. These results indicate that the capacity and the rate capability improved significantly upon carbon coating.« less

  2. Structural and Electrochemical Characterization of PureLiFePO4and Nanocomposite C-LiFePO4Cathodes for Lithium Ion Rechargeable Batteries

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kumar, Arun; Thomas, R.; Karan, N. K.; Saavedra-Arias, J. J.; Singh, M. K.; Majumder, S. B.; Tomar, M. S.; Katiyar, R. S.

    2009-01-01

    Pure lithium iron phosphate (LiFePO4) and carbon-coatedLiFePO4(C-LiFePO4) cathode materials were synthesized for Li-ion batteries. Structural and electrochemical properties of these materials were compared. X-ray diffraction revealed orthorhombic olivine structure. Micro-Raman scattering analysis indicates amorphous carbon, and TEM micrographs show carbon coating onLiFePO4particles. Ex situ Raman spectrum of C-LiFePO4at various stages of charging and discharging showed reversibility upon electrochemical cycling. The cyclic voltammograms ofLiFePO4and C-LiFePO4showed only a pair of peaks corresponding to the anodic and cathodic reactions. The first discharge capacities were 63, 43, and 13?mAh/g for C/5, C/3, and C/2, respectively forLiFePO4where as in case of C-LiFePO4that were 163, 144,more118, and 70?mAh/g for C/5, C/3, C/2, and 1C, respectively. The capacity retention of pureLiFePO4was 69% after 25 cycles where as that of C-LiFePO4was around 97% after 50 cycles. These results indicate that the capacity and the rate capability improved significantly upon carbon coating.less

  3. Optimization of L1{sub 0} FePt/Fe{sub 45}Co{sub 55} thin films for rare earth free permanent magnet applications

    SciTech Connect (OSTI)

    Giannopoulos, G. Psycharis, V.; Niarchos, D.; Reichel, L.; Markou, A.; Panagiotopoulos, I.; Damm, C.; Fhler, S.; Khan, Imran; Hong, Jisang

    2015-06-14

    The magnetic properties of magnetron sputtered bilayers consisting of Fe{sub 45}Co{sub 55} ultrathin layers on top of L1{sub 0} FePt films epitaxially grown on MgO substrates are studied in view of their possible application as rare earth free permanent magnets. It is found that FePt layers induce a tetragonal distortion to the Fe-Co layers which leads to increased anisotropy. This allows to take advantage of the Fe-Co high magnetic moment with less significant loss of the coercivity compared to a typical hard/soft exchange spring system. A maximum energy product approaching 50 MGOe is obtained for a FePt(7 ML)/FeCo/(5 ML) sample. The results are in accordance with first-principles computational methods, which predict that even higher energy products are possible for micromagnetically optimized microstructures.

  4. Alternative Fuels Data Center: Santa Fe Metro Fleet Runs on Natural Gas

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    Santa Fe Metro Fleet Runs on Natural Gas to someone by E-mail Share Alternative Fuels Data Center: Santa Fe Metro Fleet Runs on Natural Gas on Facebook Tweet about Alternative Fuels Data Center: Santa Fe Metro Fleet Runs on Natural Gas on Twitter Bookmark Alternative Fuels Data Center: Santa Fe Metro Fleet Runs on Natural Gas on Google Bookmark Alternative Fuels Data Center: Santa Fe Metro Fleet Runs on Natural Gas on Delicious Rank Alternative Fuels Data Center: Santa Fe Metro Fleet Runs on

  5. DE-FE0003060 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    DE-FE0003060 Global Assessment of Methane Gas Hydrates Last Reviewed 3/17/2015 DE-FE0003060 Goal The goal of this project is to develop a global assessment of methane gas hydrates that will facilitate informed decision-making regarding the potential development of gas hydrate resources between the scientific community and other stakeholders/decision makers. The Assessment will provide science-based information on the role of gas hydrates in natural climate change and the carbon cycle, their

  6. Duo at Santa Fe's Monte del Sol Charter

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Duo at Santa Fe's Monte del Sol Charter School takes top award in 25th New Mexico Supercomputing Challenge April 21, 2015 Using nanotechnology robots to kill cancer cells LOS ALAMOS, N.M., April 21, 2015-Meghan Hill and Katelynn James of Santa Fe's Monte del Sol Charter Sol took the top prize in the 25 th New Mexico Supercomputing Challenge Tuesday at Los Alamos National Laboratory for their research project, "Using Concentrated Heat Systems to Shock the P53 Protein to Direct Cancer into

  7. La Fonda on the Plaza, Santa Fe, NM: June 1

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sequencing, Finishing, and Analysis in the Future (SFAF) La Fonda on the Plaza, Santa Fe, NM: June 1 st - 3 rd , 2016 Please join us for the 11 th annual "Sequencing, Finishing and Analysis in the Future" Meeting on Wednesday, June 1 st through June 3 rd in beautiful, historic Santa Fe, NM. The three-day SFAF conference will focus on Next Generation Sequencing technologies, applications, and their effect on the rapidly advancing field of Genomics. If you have any questions, or would

  8. FE DOCKET NO. 10-161-LNG | Department of Energy

    Office of Environmental Management (EM)

    0-161-LNG FE DOCKET NO. 10-161-LNG ORDER CONDITIONALLY GRANTING LONG-TERM MULTI-CONTRACT AUTHORIZATION TO EXPORT LIQUEFIED NATURAL GAS BY VESSEL FROM THE FREEPORT LNG TERMINAL ON QUINTANA ISLAND, TEXAS TO NON-FREE TRADE AGREEMENT NATIONS Based on a review of the complete record and for the reasons set forth below, DOE/FE has concluded that the opponents of the FLEX Application have not demonstrated that the requested authorization would be inconsistent with the public interest. As further

  9. NNMCAB Board Minutes: July 2009 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    09 Santa Fe NNMCAB Board Minutes: July 2009 Santa Fe At This Meeting: Draft FY'2010 Committee Work Plans Update from Liaisons (LANS, DOE, EPA) Q&A With New Mexico Environment Department Consideration and Action on Recommendation 2009-06 "Support for Innovative Approaches to Community Outreach at TA-21" Consideration and Action on Recommendation 2009-07 "DOE Will Sponsor a Dose Reconstruction Study at LANL" Consideration and Action on Recommendation 2009-08 "Establish

  10. NNMCAB Board Minutes: March 2010 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    0 Santa Fe NNMCAB Board Minutes: March 2010 Santa Fe At This Meeting: NNMCAB Written Reports Consideration and Action on Recommendation 2010-02 "Reducing All Outfalls At LANL" Consideration and Action on Recommendation 2010-03 "Sufficient Funding for LANL Consent Order Clean-up Consideration and Action on Recommendation 2010-04 "Unfunded Liabilities" Consideration and Action on Recommendation 2010-05 "Interim Measure for VOC Source Removal at MDA-L and MDA -G"

  11. NNMCAB Board Minutes: May 2013 Santa Fe | Department of Energy

    Office of Environmental Management (EM)

    3 Santa Fe NNMCAB Board Minutes: May 2013 Santa Fe At This Meeting: Update from Liaisons (LANL, NMED, DOE) Consideration and Action on Recommendation 2013-04 "Update on Status of Submitted Recommendations" Consideration and Action on Recommendation 2013-05 "Recommendation for LANL Clean-Up" Consideration and Action on Recommendation 2013-07 "Realign Consent Order Priorities" Presentation LANL, Update on Chromium Filed Work, Dave McInroy, Danny Katzman PDF icon Board

  12. The Pd/Fe Interface in the Epitaxial System Pd/Fe/GaAs(001)- 4 x 6

    SciTech Connect (OSTI)

    Budnik, P.S.; Gordon, R.A.; Crozier, E.D.

    2007-01-18

    Magnetic properties of thin magnetic films are strongly affected by the nature of the interface between magnetic and non-magnetic layers. In spintronic devices the extent to which spins are scattered at an interface depends upon interfacial roughness, alloying, and impurities. We present a polarization-dependent XAFS study of a 1Pd/9Fe/GaAs(001)-(4 x 6) structure grown in situ in the MBE facility at the PNC/XOR, APS. To increase the interfacial roughness, the 1ML Pd was grown on the 9 ML Fe without first sputtering and annealing the Fe. An estimate of interfacial roughness, evidence for formation of Pd islands, their height, and the amount of As floating to the Pd surface from the GaAs are given.

  13. QER- Comment of Sustainable Santa Fe Programs Manager

    Broader source: Energy.gov [DOE]

    At the City of Santa Fe we have had difficulty in getting energy usage data from the investor-owned utility to be able to track progress towards energy use and greenhouse gas reduction goals. It would be helpful if that information were required to be publicly available at the Zip code level. Thanks.

  14. Important role of the non-uniform Fe distribution for the ferromagnetism in group-IV-based ferromagnetic semiconductor GeFe

    SciTech Connect (OSTI)

    Wakabayashi, Yuki K.; Ohya, Shinobu; Ban, Yoshisuke; Tanaka, Masaaki [Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)

    2014-11-07

    We investigate the growth-temperature dependence of the properties of the group-IV-based ferromagnetic semiconductor Ge{sub 1?x}Fe{sub x} films (x?=?6.5% and 10.5%), and reveal the correlation of the magnetic properties with the lattice constant, Curie temperature (T{sub C}), non-uniformity of Fe atoms, stacking-fault defects, and Fe-atom locations. While T{sub C} strongly depends on the growth temperature, we find a universal relationship between T{sub C} and the lattice constant, which does not depend on the Fe content x. By using the spatially resolved transmission-electron diffractions combined with the energy-dispersive X-ray spectroscopy, we find that the density of the stacking-fault defects and the non-uniformity of the Fe concentration are correlated with T{sub C}. Meanwhile, by using the channeling Rutherford backscattering and particle-induced X-ray emission measurements, we clarify that about 15% of the Fe atoms exist on the tetrahedral interstitial sites in the Ge{sub 0.935}Fe{sub 0.065} lattice and that the substitutional Fe concentration is not correlated with T{sub C}. Considering these results, we conclude that the non-uniformity of the Fe concentration plays an important role in determining the ferromagnetic properties of GeFe.

  15. SEMI-ANNUAL REPORTS FOR TEXAS LNG - TEXAS LNG - FTA - FE DKT...

    Office of Environmental Management (EM)

    TEXAS LNG - TEXAS LNG - FTA - FE DKT. NO. 13-160-LNG - 3443 SEMI-ANNUAL REPORTS FOR TEXAS LNG - TEXAS LNG - FTA - FE DKT. NO. 13-160-LNG - 3443 October 2014 April 2015 More...

  16. SEMI-ANNUAL REPORTS FOR Cameron LNG, LLC - FE Dkt. No. 15-36...

    Energy Savers [EERE]

    Cameron LNG, LLC - FE Dkt. No. 15-36-LNG - ORDER 3680 SEMI-ANNUAL REPORTS FOR Cameron LNG, LLC - FE Dkt. No. 15-36-LNG - ORDER 3680 NO REPORTS RECEIVED More Documents &...

  17. Technology Implimentation Plan - ATF FeCrAl Cladding for LWR Application

    SciTech Connect (OSTI)

    Snead, Mary A.; Snead, Lance; Terrani, Kurt A.; Field, Kevin G.; Worrall, Andrew; Robb, Kevin R.; Yamamoto, Yukinori; Powers, Jeffrey J.; Dryepondt, Sebastien N.; Pint, Bruce A.; Hu, Xunxiang

    2015-06-01

    Technology implimentation plan for FeCrAl development under the FCRD Advanced Fuel program. The document describes the activities required to get FeCrAl clad ready for LTR testing

  18. SEMI-ANNUAL REPORTS FOR ALASKA LNG PROJECT, LLC - FE DKT NO....

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ALASKA LNG PROJECT, LLC - FE DKT NO. 14-96-LNG - ORDER 3643 (NFTA) SEMI-ANNUAL REPORTS FOR ALASKA LNG PROJECT, LLC - FE DKT NO. 14-96-LNG - ORDER 3643 (NFTA) PDF icon October 2015 ...

  19. SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12...

    Energy Savers [EERE]

    SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG - ORDER 3106 SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG - ORDER 3106 PDF icon October ...

  20. Synthesis and equation of state of perovskite in the (Mg,Fe)...

    Office of Scientific and Technical Information (OSTI)

    Synthesis and equation of state of perovskite in the (Mg,Fe)subscript 3Alsubscript 2Si... in the (Mg,Fe)subscript 3Alsubscript 2Sisubscript 3Osubscript 12 system to 177 ...

  1. Transport measurements of FeAs superconductors in the 150T single...

    Office of Scientific and Technical Information (OSTI)

    Transport measurements of FeAs superconductors in the 150T single-turn magnet Citation Details In-Document Search Title: Transport measurements of FeAs superconductors in the 150T...

  2. Low temperature thermoelectric properties of Co0.9Fe0.1Sb3-based...

    Office of Scientific and Technical Information (OSTI)

    Low temperature thermoelectric properties of Co0.9Fe0.1Sb3-based skutterudite nanocomposites with FeSb2 nanoinclusions Citation Details In-Document Search Title: Low temperature ...

  3. SEMI-ANNUAL REPORTS FOR GOLDEN PASS PRODUCTS LLC - FE DKT. NO...

    Broader source: Energy.gov (indexed) [DOE]

    - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG - ORDER 3106 Semi-annual Reports for...

  4. Accelerated Thermal Aging of Fe-Zeolite SCR Catalysts Using an...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Thermal Aging of Fe-Zeolite SCR Catalysts Using an Engine-Based Systems Approach Accelerated Thermal Aging of Fe-Zeolite SCR Catalysts Using an Engine-Based Systems Approach This...

  5. High spin polarization in CoFeMnGe equiatomic quaternary Heusler...

    Office of Scientific and Technical Information (OSTI)

    Title: High spin polarization in CoFeMnGe equiatomic quaternary Heusler alloy We report the structure, magnetic property, and spin polarization of CoFeMnGe equiatomic...

  6. Iron Pyrite Thin Films Synthesized from an Fe(acac)[subscript...

    Office of Scientific and Technical Information (OSTI)

    Iron Pyrite Thin Films Synthesized from an Fe(acac)subscript 3 Ink Citation Details In-Document Search Title: Iron Pyrite Thin Films Synthesized from an Fe(acac)subscript 3 Ink...

  7. Details of the FY 2014 Budget Request for FE | Department of...

    Energy Savers [EERE]

    Details of the FY 2014 Budget Request for FE Details of the FY 2014 Budget Request for FE Detailed budget justifications for the Office of Fossil Energy for FY 2014 budget request....

  8. Structure and Electrochemistry of Vanadium-Modified LiFePO4 ...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Structure and Electrochemistry of Vanadium-Modified LiFePO4 Citation Details In-Document Search Title: Structure and Electrochemistry of Vanadium-Modified LiFePO4...

  9. Vast Energy Resource in Residual Oil Zones, FE Study Says | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Vast Energy Resource in Residual Oil Zones, FE Study Says Vast Energy Resource in Residual Oil Zones, FE Study Says July 20, 2012 - 1:00pm Addthis Washington, DC - Billions of ...

  10. Magnetocaloric effect of Pr2Fe17-x Mn x alloys (Journal Article...

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Search Results Journal Article: Magnetocaloric effect of Pr2Fe17-x Mn x alloys Citation Details In-Document Search Title: Magnetocaloric effect of Pr2Fe17-x Mn x ...

  11. Pairing state with a time-reversal symmetry breaking in FeAs...

    Office of Scientific and Technical Information (OSTI)

    in FeAs-based superconductors Citation Details In-Document Search Title: Pairing state with a time-reversal symmetry breaking in FeAs-based superconductors You are ...

  12. Transport measurements of FeAs superconductors in the 150T single...

    Office of Scientific and Technical Information (OSTI)

    Transport measurements of FeAs superconductors in the 150T single-turn magnet Citation Details In-Document Search Title: Transport measurements of FeAs superconductors in the 150T ...

  13. Approaching isotropy in the vortex system of SmFeAs(O,F) at extreme...

    Office of Scientific and Technical Information (OSTI)

    vortex system of SmFeAs(O,F) at extreme magnetic fields Citation Details In-Document Search Title: Approaching isotropy in the vortex system of SmFeAs(O,F) at extreme magnetic ...

  14. Structural and Mssbauer spectroscopic study of Fe-Ni alloy nanoparticles

    SciTech Connect (OSTI)

    Kumar, Asheesh; Banerjee, S. Sudarsan, V.; Meena, S. S.

    2014-04-24

    Nano-crystalline Fe-Ni alloys have been synthesized in ethylene glycol medium. Based on XRD studies it is confirmed that, in these alloys Fe atoms are incorporated at Ni site to form Ni-Fe solid solutions. Mssbauer studies have established that for alloy particles having smaller size there is significant concentration of two different types of paramagnetic Fe species and their relative concentration decreased with increase in particle size.

  15. High strength-high conductivity Cu--Fe composites produced by powder compaction/mechanical reduction

    DOE Patents [OSTI]

    Verhoeven, John D. (Ames, IA); Spitzig, William A. (Ames, IA); Gibson, Edwin D. (Ames, IA); Anderson, Iver E. (Ames, IA)

    1991-08-27

    A particulate mixture of Cu and Fe is compacted and mechanically reduced to form an "in-situ" Cu-Fe composite having high strength and high conductivity. Compaction and mechanical reduction of the particulate mixture are carried out at a temperature and time at temperature selected to avoid dissolution of Fe into the Cu matrix particulates to a harmful extent that substantially degrades the conductivity of the Cu-Fe composite.

  16. High strength-high conductivity Cu-Fe composites produced by powder compaction/mechanical reduction

    DOE Patents [OSTI]

    Verhoeven, J.D.; Spitzig, W.A.; Gibson, E.D.; Anderson, I.E.

    1991-08-27

    A particulate mixture of Cu and Fe is compacted and mechanically reduced to form an ''in-situ'' Cu-Fe composite having high strength and high conductivity. Compaction and mechanical reduction of the particulate mixture are carried out at a temperature and time at temperature selected to avoid dissolution of Fe into the Cu matrix particulates to a harmful extent that substantially degrades the conductivity of the Cu-Fe composite. 5 figures.

  17. Importance of Doping and Frustration in Itinerant Fe-doped Cr2Al

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Susner, Michael A; Parker, David S; Safa-Sefat, Athena

    2015-01-01

    We have performed an experimental and theoretical study comparing the effects of Fe-doping of Cr2Al, an antiferromagnet with a N el temperature of 670 K, with known results on Fe-doping of antiferromagnetic bcc Cr. (Cr1-xFex)2Al materials are found to exhibit a rapid suppression of antiferromagnetic order with the presence of Fe, decreasing TN to 170 K for x=0.10. Antiferromagnetic behavior disappears entirely at x 0.125 after which point increasing paramagnetic behavior is exhibited. This is unlike the effects of Fe doping of bcc antiferromagnetic Cr, in which TN gradually decreases followed by the appearance of a ferromagnetic state. Theoretical calculationsmore » explain that the Cr2Al-Fe suppression of magnetic order originates from two effects: the first is band narrowing caused by doping of additional electrons from Fe substitution that weakens itinerant magnetism; the second is magnetic frustration of the Cr itinerant moments in Fe-substituted Cr2Al. In pure-phase Cr2Al, the Cr moments have an antiparallel alignment; however, these are destroyed through Fe substitution and the preference of Fe for parallel alignment with Cr. This is unlike bulk Fe-doped Cr alloys in which the Fe anti-aligns with the Cr atoms, and speaks to the importance of the Al atoms in the magnetic structure of Cr2Al and Fe-doped Cr2Al.« less

  18. Importance of Doping and Frustration in Itinerant Fe-doped Cr2Al

    SciTech Connect (OSTI)

    Susner, Michael A; Parker, David S; Safa-Sefat, Athena

    2015-01-01

    We have performed an experimental and theoretical study comparing the effects of Fe-doping of Cr2Al, an antiferromagnet with a N el temperature of 670 K, with known results on Fe-doping of antiferromagnetic bcc Cr. (Cr1-xFex)2Al materials are found to exhibit a rapid suppression of antiferromagnetic order with the presence of Fe, decreasing TN to 170 K for x=0.10. Antiferromagnetic behavior disappears entirely at x 0.125 after which point increasing paramagnetic behavior is exhibited. This is unlike the effects of Fe doping of bcc antiferromagnetic Cr, in which TN gradually decreases followed by the appearance of a ferromagnetic state. Theoretical calculations explain that the Cr2Al-Fe suppression of magnetic order originates from two effects: the first is band narrowing caused by doping of additional electrons from Fe substitution that weakens itinerant magnetism; the second is magnetic frustration of the Cr itinerant moments in Fe-substituted Cr2Al. In pure-phase Cr2Al, the Cr moments have an antiparallel alignment; however, these are destroyed through Fe substitution and the preference of Fe for parallel alignment with Cr. This is unlike bulk Fe-doped Cr alloys in which the Fe anti-aligns with the Cr atoms, and speaks to the importance of the Al atoms in the magnetic structure of Cr2Al and Fe-doped Cr2Al.

  19. The local structure and ferromagnetism in Fe-implanted SrTiO? single crystals

    SciTech Connect (OSTI)

    Lobacheva, O. Chavarha, M.; Yiu, Y. M.; Sham, T. K.; Goncharova, L. V.

    2014-07-07

    We report a connection between the local structure of low-level Fe impurities and vacancies as the cause of ferromagnetic behavior observed in strontium titanate single crystals (STO), which were implanted with Fe and Si ions at different doses then annealed in oxygen. The effects of Fe doping and post-implantation annealing of STO were studied by X-ray Absorption Near Edge Structure (XANES) spectroscopy and Superconducting Quantum Interference Device magnetometry. XANES spectra for Fe and Ti K- and L-edge reveal the changes in the local environment of Fe and Ti following the implantation and annealing steps. The annealing in oxygen atmosphere partially healed implantation damages and changed the oxidation state of the implanted iron from metallic Fe? to Fe?/Fe? oxide. The STO single crystals were weak ferromagnets prior to implantation. The maximum saturation moment was obtained after our highest implantation dose of 210? Fe atom/cm, which could be correlated with the metallic Fe? phases in addition to the presence of O/Ti vacancies. After recrystallization annealing, the ferromagnetic response disappears. Iron oxide phases with Fe? and Fe? corresponding to this regime were identified and confirmed by calculations using Real Space Multiple Scattering program (FEFF9).

  20. Magnetic behaviour of the rare earth binary R-Fe alloys

    SciTech Connect (OSTI)

    Cabral, F.A.O.; Turtelli, R.S.; Gama, S.; Machado, F.L.A. )

    1989-09-01

    Thermomagnetic analysis and coercive field measurements in rare-earth-rich alloys of the systems Fe-Ce, Fe-Pr and Fe-Nd suggest the presence of two different magnetically hard phases in all these systems. These phases can be metastable and their magnetic properties are strongly affected by heat-treatments at 600{sup 0}C.

  1. A synthesis of LiFePO{sub 4} starting from FePO{sub 4} under reducing atmosphere

    SciTech Connect (OSTI)

    Prosini, Pier Paolo; Cento, Cinzia; Masci, Amedeo; Carewska, Maria; Gislon, Paola

    2014-06-19

    A fast and easy way to produce LiFePO{sub 4} starting from FePO{sub 4}, used as iron and phosphorus source, is proposed. 5% hydrogen is employed as a reducing agent and various compounds containing lithium as lithiation agents. The selected lithiation agents included: LiCl, CH{sub 3}COOLi, LiOH, Li{sub 2}S, LiH, and Li{sub 2}CO{sub 3}. Solid state synthesis is used for the LiFePO{sub 4} preparation and the so obtained materials are structurally characterized by XRD. The materials are used to fabricate composite electrode and their specific capacity is evaluated by low rate galvanostatic charge/discharge cycles (C/10 rate). Among the various lithium salts, the acetate give rise to the LiFePO{sub 4} with the best electrochemical performance. The morphology of this material is further investigated by SEM microscopy and the specific capacity is evaluated as a function of the discharge rate and the cycle number.

  2. Molecular Dynamics Study of Fe(II) Adsorption, Electron Exchange, and Mobility at Goethite (alpha-FeOOH) Surfaces

    SciTech Connect (OSTI)

    Zarzycki, Piotr P.; Kerisit, Sebastien N.; Rosso, Kevin M.

    2015-02-12

    We present classical molecular simulations of the adsorption free energy profiles for the aqueous Fe(II) ion approaching key low index crystal faces of goethite at neutral surface charge conditions. Calculated profiles show minima corresponding to stable outer- and inner-sphere adsorbed structures. We analyzed the energetics and kinetics of most possible interfacial electron transfer reactions, as well as analyzing the same for subsurface migration pathways of injected electrons through calculating the Marcus free energy surfaces. We conclude that inner-sphere Fe(II)-complex formation is required for the interfacial electron transfer to occur, but the energetic cost of moving from the outer-sphere to inner-sphere geometry may prevent electron injection at some faces. We also show that some surfaces, especially (101), (100) and (001), are more energetically prone toward reduction than others. We demonstrate that subsurface charge migration in directions parallel to the surface, which run along the iron chains, is more energetically plausible than conduction through the resistive crystal bulk phase. Collectively this leads to the conclusion that Fe(II)-catalyzed recrystallization of goethite most likely proceeds by short path length electron migration through specific goethite surfaces along specific directions, until capture at Fe sites structurally susceptible to reduction and release.

  3. Ultra-thin L1{sub 0}-FePt for perpendicular anisotropy L1{sub 0}-FePt/Ag/[Co/Pd]{sub 30} pseudo spin valves

    SciTech Connect (OSTI)

    Ho, Pin; Chow, Gan Moog; Chen, Jing-Sheng, E-mail: msecj@nus.edu.sg [Department of Materials Science and Engineering, National University of Singapore, Singapore 117576 (Singapore); Han, Guchang [Data Storage Institute, Agency of Science, Technology and Research (A-STAR), Singapore 117608 (Singapore); He, Kaihua [School of Mathematics and Physics, China University of Geosciences, Wuhan 430074 (China)

    2014-05-07

    Perpendicular anisotropy L1{sub 0}-FePt/Ag/[Co/Pd]{sub 30} pseudo spin valves (PSVs) with ultra-thin L1{sub 0}-FePt alloy free layer possessing high anisotropy and thermal stability have been fabricated and studied. The thickness of the L1{sub 0}-FePt layer was varied between 2 and 4?nm. The PSV became increasingly decoupled with reduced L1{sub 0}-FePt thickness due to the larger difference between the coercivity of the L1{sub 0}-FePt and [Co/Pd]{sub 30} films. The PSV with an ultra-thin L1{sub 0}-FePt free layer of 2?nm displayed a high K{sub u} of 2.21??10{sup 7}?ergs/cm{sup 3}, high thermal stability of 84 and a largest giant magnetoresistance of 0.54%.

  4. Evolution of stable and metastable phases and coercivity in rare-earth-rich alloys of the Fe-Nd and Fe-Pr systems

    SciTech Connect (OSTI)

    Cabral, F.A.O. ); Gama, S. )

    1990-09-01

    The authors have studied eutectic alloys of the Fe-Nd and Fe-Pr systems regarding their magnetic behavior in the as-cast state and heat-treated at 600 C for different periods. In both systems the initial precipitation of a metastable phase is observed. This phase transforms into Fe{sub 17}Nd{sub 2} and this finally into a second phase with Fe{sub 17}Nd{sub 5} stoichiometry that is stable. For the Fe-Pr system the precipitation of two metastable phases that transform into the stable Fe{sub 17}Pr{sub 2} is observed. The authors have also measured the influence of these transformations on the coercivity of these alloys.

  5. Magnetotransport of proton-irradiated BaFe 2 As 2 and BaFe 1.985 Co 0.015

    Office of Scientific and Technical Information (OSTI)

    As 2 single crystals (Journal Article) | SciTech Connect Magnetotransport of proton-irradiated BaFe 2 As 2 and BaFe 1.985 Co 0.015 As 2 single crystals Citation Details In-Document Search Title: Magnetotransport of proton-irradiated BaFe 2 As 2 and BaFe 1.985 Co 0.015 As 2 single crystals Authors: Moseley, D. A. ; Yates, K. A. ; Peng, N. ; Mandrus, D. ; Sefat, A. S. ; Branford, W. R. ; Cohen, L. F. Publication Date: 2015-02-17 OSTI Identifier: 1180760 Type: Publisher's Accepted Manuscript

  6. Engineering of high performance supercapacitor electrode based on Fe-Ni/Fe{sub 2}O{sub 3}-NiO core/shell hybrid nanostructures

    SciTech Connect (OSTI)

    Singh, Ashutosh K. E-mail: aksingh@bose.res.in; Mandal, Kalyan

    2015-03-14

    The present work reports on fabrication and supercapacitor applications of a core/shell Fe-Ni/Fe{sub 2}O{sub 3}-NiO hybrid nanostructures (HNs) electrode. The core/shell Fe-Ni/Fe{sub 2}O{sub 3}-NiO hybrid nanostructures have been fabricated through a two step method (nanowire fabrication and their controlled oxidation). The 1D hybrid nanostructure consists of highly porous shell layer (redox active materials NiO and Fe{sub 2}O{sub 3}) and the conductive core (FeNi nanowire). Thus, the highly porous shell layer allows facile electrolyte diffusion as well as faster redox reaction kinetics; whereas the conductive FeNi nanowire core provides the proficient express way for electrons to travel to the current collector, which helps in the superior electrochemical performance. The core/shell Fe-Ni/Fe{sub 2}O{sub 3}-NiO hybrid nanostructures electrode based supercapacitor shows very good electrochemical performances in terms of high specific capacitance nearly 1415?F g{sup ?1} at a current density of 2.5?A g{sup ?1}, excellent cycling stability and rate capability. The high quality electrochemical performance of core/shell hybrid nanostructures electrode shows its potential as an alternative electrode for forthcoming supercapacitor devices.

  7. Low temperature thermoelectric properties of Co0.9Fe0.1Sb3-based

    Office of Scientific and Technical Information (OSTI)

    skutterudite nanocomposites with FeSb2 nanoinclusions (Journal Article) | SciTech Connect Low temperature thermoelectric properties of Co0.9Fe0.1Sb3-based skutterudite nanocomposites with FeSb2 nanoinclusions Citation Details In-Document Search Title: Low temperature thermoelectric properties of Co0.9Fe0.1Sb3-based skutterudite nanocomposites with FeSb2 nanoinclusions Bulk thermoelectric nanocomposite materials have great potential to exhibit higher ZT due to effects arising from their

  8. Angle-resolved photoemission spectroscopy study of PrFeAsO0.7: Comparison

    Office of Scientific and Technical Information (OSTI)

    with LaFePO (Journal Article) | SciTech Connect Angle-resolved photoemission spectroscopy study of PrFeAsO0.7: Comparison with LaFePO Citation Details In-Document Search Title: Angle-resolved photoemission spectroscopy study of PrFeAsO0.7: Comparison with LaFePO Authors: Nishi, I. ; Ishikado, M. ; Ideta, S. ; Malaeb, W. ; Yoshida, T. ; Fujimori, A. ; Kotani, Y. ; Kubota, M. ; Ono, K. ; Yi, M. ; Lu, D. H. ; Moore, R. ; Shen, Z.-X. ; Iyo, A. ; Kihou, K. ; Kito, H. ; Eisaki, H. ; Shamoto, S. ;

  9. Assembly and Evolution of Complex Fe-S Clusters as Revealed by X-ray

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Crystallography Assembly and Evolution of Complex Fe-S Clusters as Revealed by X-ray Crystallography Complex Fe-S cluster-containing enzymes are ubiquitous in nature where they are involved in a number of fundamental reactions for life including carbon dioxide fixation, nitrogen fixation, and hydrogen metabolism. One of the more complex and unusual biological clusters is found in the [FeFe]-hydrogenase. The active-site H-cluster in these enzymes has a [4Fe-4S] subcluster bridged via a

  10. SEMI-ANNUAL REPORTS -- WENTWORTH GAS MARKETING LLC - FTA - FE DKT NO.

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    14-63-CNG - ORDER 3515 | Department of Energy -- WENTWORTH GAS MARKETING LLC - FTA - FE DKT NO. 14-63-CNG - ORDER 3515 SEMI-ANNUAL REPORTS -- WENTWORTH GAS MARKETING LLC - FTA - FE DKT NO. 14-63-CNG - ORDER 3515 No Reports Received More Documents & Publications SEMI-ANNUAL REPORTS FOR TEXAS LNG - TEXAS LNG - FTA - FE DKT. NO. 13-160-LNG - 3443 SEMI-ANNUAL REPORTS - TEXAS LNG BROWNSVILLE LLC - FE DKT. 15-62-LNG - Order 3716 FTA Wentworth Gas Martketing LLC - FE Dkt. No. 14-63

  11. Microsoft Word - santa-fe-county-fact-sheet-2013-2014.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    LANL:CPO: Los Alamos National Laboratory Impacts and Investments in Santa Fe County LA-UR 11-02378 (3/31/14) Santa Fe County Los Alamos National Laboratory 2013-2014 Impacts and Investments Santa Fe County is home to 1,982 LANL employees and contractors. As of July 2013, $250,917,180 in annual base salaries was being paid to LANL employees (excluding contractors and craft employees) in Santa Fe County. In FY13, LANL purchased $14,993,363 in products and services from businesses in Santa Fe

  12. Thermoelectric properties of Co0.9Fe0.1Sb3-based skutterudite

    Office of Scientific and Technical Information (OSTI)

    nanocomposites with FeSb2 nanoinclusions (Journal Article) | SciTech Connect Thermoelectric properties of Co0.9Fe0.1Sb3-based skutterudite nanocomposites with FeSb2 nanoinclusions Citation Details In-Document Search Title: Thermoelectric properties of Co0.9Fe0.1Sb3-based skutterudite nanocomposites with FeSb2 nanoinclusions Bulk thermoelectric nanocomposite materials have great potential to exhibit higher figure of merit due to effects arising from the nanostructure. In this paper, we report

  13. Ferromagnetic interactions and martensitic transformation in Fe doped Ni-Mn-In shape memory alloys

    SciTech Connect (OSTI)

    Lobo, D. N.; Priolkar, K. R.; Emura, S.; Nigam, A. K.

    2014-11-14

    The structure, magnetic, and martensitic properties of Fe doped Ni-Mn-In magnetic shape memory alloys have been studied by differential scanning calorimetry, magnetization, resistivity, X-ray diffraction (XRD), and EXAFS. While Ni{sub 2}MnIn{sub 1?x}Fe{sub x} (0???x???0.6) alloys are ferromagnetic and non martensitic, the martensitic transformation temperature in Ni{sub 2}Mn{sub 1.5}In{sub 1?y}Fe{sub y} and Ni{sub 2}Mn{sub 1.6}In{sub 1?y}Fe{sub y} increases for lower Fe concentrations (y???0.05) before decreasing sharply for higher Fe concentrations. XRD analysis reveals presence of cubic and tetragonal structural phases in Ni{sub 2}MnIn{sub 1?x}Fe{sub x} at room temperature with tetragonal phase content increasing with Fe doping. Even though the local structure around Mn and Ni in these Fe doped alloys is similar to martensitic Mn rich Ni-Mn-In alloys, presence of ferromagnetic interactions and structural disorder induced by Fe affect Mn-Ni-Mn antiferromagnetic interactions resulting in suppression of martensitic transformation in these Fe doped alloys.

  14. The effect of Fe-Rh alloying on CO hydrogenation to C2+ oxygenates

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Palomino, Robert; Magee, Joseph W.; Llorca, Jordi; Senanayake, Sanjaya D.; White, Michael G.

    2015-05-20

    A combination of reactivity and structural studies using X-ray diffraction (XRD), pair distribution function (PDF), and transmission electron microscopy (TEM) was used to identify the active phases of Fe-modified Rh/TiO2 catalysts for the synthesis of ethanol and other C2+ oxygenates from CO hydrogenation. XRD and TEM confirm the existence of Fe–Rh alloys for catalyst with 1–7 wt% Fe and ~2 wt% Rh. Rietveld refinements show that FeRh alloy content increases with Fe loading up to ~4 wt%, beyond which segregation to metallic Fe becomes favored over alloy formation. Catalysts that contain Fe metal after reduction exhibit some carburization as evidencedmore »by the formation of small amounts of Fe3C during CO hydrogenation. Analysis of the total Fe content of the catalysts also suggests the presence of FeOx also increased under reaction conditions. Reactivity studies show that enhancement of ethanol selectivity with Fe loading is accompanied by a significant drop in CO conversion. Comparison of the XRD phase analyses with selectivity suggests that higher ethanol selectivity is correlated with the presence of Fe–Rh alloy phases. As a result, the interface between Fe and Rh serves to enhance the selectivity of ethanol, but suppresses the activity of the catalyst which is attributed to the blocking or modifying of Rh active sites.« less

  15. The effect of Fe-Rh alloying on CO hydrogenation to C2+ oxygenates

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Palomino, Robert; Magee, Joseph W.; Llorca, Jordi; Senanayake, Sanjaya D.; White, Michael G.

    2015-05-20

    A combination of reactivity and structural studies using X-ray diffraction (XRD), pair distribution function (PDF), and transmission electron microscopy (TEM) was used to identify the active phases of Fe-modified Rh/TiO2 catalysts for the synthesis of ethanol and other C2+ oxygenates from CO hydrogenation. XRD and TEM confirm the existence of Fe–Rh alloys for catalyst with 1–7 wt% Fe and ~2 wt% Rh. Rietveld refinements show that FeRh alloy content increases with Fe loading up to ~4 wt%, beyond which segregation to metallic Fe becomes favored over alloy formation. Catalysts that contain Fe metal after reduction exhibit some carburization as evidencedmore » by the formation of small amounts of Fe3C during CO hydrogenation. Analysis of the total Fe content of the catalysts also suggests the presence of FeOx also increased under reaction conditions. Reactivity studies show that enhancement of ethanol selectivity with Fe loading is accompanied by a significant drop in CO conversion. Comparison of the XRD phase analyses with selectivity suggests that higher ethanol selectivity is correlated with the presence of Fe–Rh alloy phases. As a result, the interface between Fe and Rh serves to enhance the selectivity of ethanol, but suppresses the activity of the catalyst which is attributed to the blocking or modifying of Rh active sites.« less

  16. Oxide shell reduction and magnetic property changes in core-shell Fe nanoclusters under ion irradiation

    SciTech Connect (OSTI)

    Sundararajan, Jennifer A.; Kaur, Maninder; Qiang, You, E-mail: youqiang@uidaho.edu [Department of Physics, University of Idaho, Moscow, Idaho 83844 (United States); Jiang, Weilin [Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352 (United States); McCloy, John S. [School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164 (United States)

    2014-05-07

    Ion irradiation effects are studied on the Fe-based core-shell nanocluster (NC) films with core as Fe and shell as Fe{sub 3}O{sub 4}/Fe{sub 3}N. These NC films were deposited on Si substrates to thickness of ?0.5 ?m using a NC deposition system. The films were irradiated at room temperature with 5.5?MeV Si{sup 2+} ions to ion fluences of 10{sup 15} and 10{sup 16} ions/cm{sup 2}. It is found that the irradiation induces grain growth, Fe valence reduction in the shell, and crystallization or growth of Fe{sub 3}N. The film retained its Fe-core and its ferromagnetic properties after irradiation. The nature and mechanism of oxide shell reduction and composition dependence after irradiation were studied by synthesizing additional NC films of Fe{sub 3}O{sub 4} and FeO?+?Fe{sub 3}N and irradiating them under the same conditions. The presence of nanocrystalline Fe is found to be a major factor for the oxide shell reduction. The surface morphologies of these films show dramatic changes in the microstructures due to cluster growth and agglomeration as a result of ion irradiation.

  17. Spectroscopic study of Gd nanostructures quantum confined in Fe corrals

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Cao, R. X.; Sun, L.; Miao, B. F.; Li, Q. L.; Zheng, C.; Wu, D.; You, B.; Zhang, W.; Han, P.; Bader, S. D.; et al

    2015-07-10

    Low dimensional nanostructures have attracted attention due to their rich physical properties and potential applications. The essential factor for their functionality is their electronic properties, which can be modified by quantum confinement. Here the electronic states of Gd atom trapped in open Fe corrals on Ag(111) were studied via scanning tunneling spectroscopy. A single spectroscopic peak above the Fermi level is observed after Gd adatoms are trapped inside Fe corrals, while two peaks appear in empty corrals. The single peak position is close to the higher energy peak of the empty corrals. These findings, attributed to quantum confinement of themore » corrals and Gd structures trapped inside, are supported by tight-binding calculations. As a result, this demonstrates and provides insights into atom trapping in open corrals of various diameters, giving an alternative approach to modify the properties of nano-objects.« less

  18. Reaction-based reactive transport modeling of Fe(III)

    SciTech Connect (OSTI)

    Kemner, K.M.; Kelly, S.D.; Burgos, Bill; Roden, Eric

    2006-06-01

    This research project (started Fall 2004) was funded by a grant to Argonne National Laboratory, The Pennsylvania State University, and The University of Alabama in the Integrative Studies Element of the NABIR Program (DE-FG04-ER63914/63915/63196). Dr. Eric Roden, formerly at The University of Alabama, is now at the University of Wisconsin, Madison. Our project focuses on the development of a mechanistic understanding and quantitative models of coupled Fe(III)/U(VI) reduction in FRC Area 2 sediments. This work builds on our previous studies of microbial Fe(III) and U(VI) reduction, and is directly aligned with the Scheibe et al. NABIR FRC Field Project at Area 2.

  19. fe0013531-Oregon-State | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Assessing the Response of Methane Hydrates to Environmental Change at the Svalbad Continental Margin Last Reviewed 12/4/2015 DE-FE0013531 Goal The project goal is to study the biogeochemical response of gas hydrates to environmental change at the Svalbad Continental Margin. Performer Oregon State University, Corvallis, OR 97339-1086 Background More research is needed to better understand the role gas hydrates play in the global carbon cycle and their potential as a future energy resource. This

  20. fe0025387-Petrotechnical-Resources | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Support for Methane Hydrate Research on the Alaska North Slope Last Reviewed 1/15/2016 DE-FE0025387 Goal The objective of this contract between the Department of Energy (DOE) and Petrotechnical Resources of Alaska (PRA) is to provide specific planning, analytical, arctic engineering, and environmental services associated with the potential drilling of methane hydrate stratigraphic test well(s) and a long-term methane hydrate production test well on the North Slope of Alaska. Performer

  1. Engineering Multimetallic FePt-based nanowires for enhancing oxygen

    Office of Scientific and Technical Information (OSTI)

    reduction and methanol oxidation reactions (Conference) | SciTech Connect and methanol oxidation reactions Citation Details In-Document Search Title: Engineering Multimetallic FePt-based nanowires for enhancing oxygen reduction and methanol oxidation reactions Authors: Guo, Shaojun [1] + Show Author Affiliations Los Alamos National Laboratory [Los Alamos National Laboratory Publication Date: 2014-04-28 OSTI Identifier: 1129839 Report Number(s): LA-UR-13-28235 DOE Contract Number:

  2. Engineering Multimetallic FePt-based nanowires for enhancing oxygen

    Office of Scientific and Technical Information (OSTI)

    reduction and methanol oxidation reactions (Conference) | SciTech Connect and methanol oxidation reactions Citation Details In-Document Search Title: Engineering Multimetallic FePt-based nanowires for enhancing oxygen reduction and methanol oxidation reactions × You are accessing a document from the Department of Energy's (DOE) SciTech Connect. This site is a product of DOE's Office of Scientific and Technical Information (OSTI) and is provided as a public service. Visit OSTI to utilize

  3. Engineering Multimetallic FePt-based nanowires for enhancing oxygen

    Office of Scientific and Technical Information (OSTI)

    reduction reaction and methanol oxidation reaction (Conference) | SciTech Connect reaction and methanol oxidation reaction Citation Details In-Document Search Title: Engineering Multimetallic FePt-based nanowires for enhancing oxygen reduction reaction and methanol oxidation reaction Authors: Guo, Shaojun [1] + Show Author Affiliations Los Alamos National Laboratory [Los Alamos National Laboratory Publication Date: 2014-04-28 OSTI Identifier: 1129838 Report Number(s): LA-UR-13-28232 DOE

  4. Engineering Multimetallic FePt-based nanowires for enhancing oxygen

    Office of Scientific and Technical Information (OSTI)

    reduction reaction and methanol oxidation reaction (Conference) | SciTech Connect reaction and methanol oxidation reaction Citation Details In-Document Search Title: Engineering Multimetallic FePt-based nanowires for enhancing oxygen reduction reaction and methanol oxidation reaction × You are accessing a document from the Department of Energy's (DOE) SciTech Connect. This site is a product of DOE's Office of Scientific and Technical Information (OSTI) and is provided as a public service.

  5. Quadrennial Energy Review Stakeholder Meeting #10: Santa Fe, NM

    Broader source: Energy.gov (indexed) [DOE]

    0: Santa Fe, NM State, Local and Tribal Issues August 11, 2014 Opening Remarks Melanie Kenderdine, Director, Office of Energy Policy and Systems Analysis and Energy Counselor to the Secretary, U.S. Department of Energy The U.S. Department of Energy (DOE) is undertaking the analytical work for the Quadrennial Energy Review (QER) and is responsible for the stakeholder outreach process. Ms. Kenderdine introduced Secretary Moniz, Secretary Jewell and Senator Heinrich. The Honorable Martin Heinrich

  6. SF 6432-FE Fixed Price Contracts Outside the US

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Owner: Procurement Policy Department Release Date: 11/17/15 Page 1 of 16 Printed copies of this document are uncontrolled. Retrieve latest version electronically. SANDIA CORPORATION SF 6432-FE (11/2015) SECTION II STANDARD TERMS AND CONDITIONS FOR FIXED PRICE CONTRACTS OUTSIDE OF THE UNITED STATES OF AMERICA THE FOLLOWING CLAUSES APPLY TO REQUESTS FOR QUOTATION AND CONTRACTS AS INDICATED UNLESS SPECIFICALLY DELETED, OR EXCEPT TO THE EXTENT THEY ARE SPECIFICALLY SUPPLEMENTED OR AMENDED IN

  7. DE-FE0009897 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Hydrate-Bearing Clayey Sediments: Morphology, Physical Properties, Production and Engineering/Geological Implications Last Reviewed 12/1/2015 DE-FE0009897 Goal The primary goal of this research effort is to contribute to an in-depth understanding of hydrate bearing, fine-grained sediments with a focus on investigation of their potential for hydrate-based gas production. Performer Georgia Tech Research Corporation, Atlanta GA Background Fine-grained sediments host more than 90 percent of global

  8. DE-FE0009927 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Verification Of Capillary Pressure Functions And Relative Permeability Equations For Modeling Gas Production From Gas Hydrates Last Reviewed 11/30/2015 DE-FE0009927 Goal The goal of this project is to verify and validate the capillary pressure functions and relative permeability equations that are frequently used in hydrate numerical simulators. In order to achieve this goal, numerical simulation using a network model will be used to suggest fitting parameters, modify existing equations or, if

  9. DE-FE0010120 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Reconstructing Paleo-SMT Positions on the Cascadia Margin Using Magnetic Susceptibility Last Reviewed 1/2/2015 DE-FE0010120 Goal The goal of this project is to provide the gas hydrate community with a proven, geologically well-preserved proxy for paleo- sulfate-methane transition (SMT) reconstructions using magnetic susceptibility (χ) and grain size measurements to track diagenetic changes that are associated with the anaerobic oxidation of methane. To achieve this goal, this project aims to

  10. DE-FE0010144 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mapping Permafrost and Gas Hydrate using Marine Controlled Source Electromagnetic Methods (CSEM) Last Reviewed 11/27/2015 DE-FE0010144 Goal The objective of this project is to develop and test a towed electromagnetic source and receiver system suitable for deployment from small coastal vessels to map near-surface electrical structure in shallow water. The system will be used to collect permafrost data in the shallow water of the U.S. Beaufort Inner Shelf at locations coincident with seismic

  11. DE-FE0010160 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Advanced Hydrate Reservoir Modeling Using Rock Physics Techniques Last Reviewed 11/27/2015 DE-FE0010160 Goal The primary goal of this research is to develop analytical techniques capable of quantitatively evaluating the nature of methane hydrate reservoir systems through modeling of their acoustic response using techniques that integrate rock physics theory, amplitude analysis, and spectral decomposition. Performers Fugro GeoConsulting, Inc., Houston TX Background Past efforts under the

  12. DE-FE0010175 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Planning of a Marine Methane Hydrate Pressure Coring Program for the Walker Ridge and Green Canyon Areas of the Gulf of Mexico Last Reviewed 11/27/2015 DE-FE0010175 Goal The primary goal of this research is to develop scientific, operational, and logistical plans for a future methane hydrate-focused offshore coring program, including a scope of work, technical specifications, and schedule and budget estimate needed to implement a marine expedition. Performers Fugro GeoConsulting, Inc., Houston

  13. DE-FE0010406 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Controls On Methane Expulsion During Melting Of Natural Gas Hydrate Systems Last Reviewed 11/30/2015 DE-FE0010406 Goal The project goal is to predict, given characteristic climate-induced temperature change, the conditions under which gas will be expelled from existing accumulations of gas hydrate into the shallow ocean or directly to the atmosphere. When those conditions are met, the fraction of the gas accumulation that escapes and the rate of escape shall be quantified. The predictions shall

  14. DE-FE0010496 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Application of CrunchFlow Routines to Constrain Present and Past Carbon Fluxes at Gas-Hydrate Bearing Sites Last Reviewed 3/6/2014 DE-FE0010496 Goal The goal of this project is to apply a multi-component, multi-dimensional reactive transport simulation code to constrain modern day methane fluxes and to reconstruct past episodes of methane flux that can be correlated with environmental changes. Performers Oregon State University - Corvallis, OR Background The importance of understanding the role

  15. DE-FE0010667 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Liquid-Rich Shale Potential of Utah's Uinta and Paradox Basins: Reservoir Characterization and Development Optimization Last Reviewed 12/4/2015 DE-FE0010667 Goal The project goal is to provide reservoir-specific geological and engineering analyses of the emerging Green River Formation (GRF) tight oil plays in the Uinta Basin, and the established, yet understudied Cane Creek shale (and possibly other shale units) of the Paradox Formation in the Paradox Basin. Performers Utah Geological Survey,

  16. DE-FE0012862 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Novel Flow Sheet for Low Energy CO2 Capture Enabled by Biocatalyst Delivery System Project No.: DE-FE0012862 Akermin is conducting laboratory and integrated bench-scale pilot testing to validate the performance of their next generation Biocatalyst Delivery System (BDS). This effort builds upon work conducted under a previous project. The novel system enables on-stream replacement of the catalyst and enables integration with an advanced process flow scheme. Akermin is exploring an enzyme-enabled

  17. DE-FE0013122 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Supersonic Post-Combustion Inertial CO2 Extraction System Project No.: DE-FE0013122 Alliant Techsystems Operations, LLC is developing a new method for CO2 capture that utilizes a unique aero-thermodynamic inertial separation device derived from aerospace applications. Flue gas from coal-fired power plants is directed to a converging-diverging nozzle and expanded to supersonic velocities. This process converts potential energy (in the form of pressure and temperature) into kinetic energy. The

  18. DE-FE0013127 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bench Scale Development and Testing of Aerogel Sorbent for CO2 Capture Project No.: DE-FE0013127 Formation of aerogel pellets Formation of aerogel pellets Aspen Aerogels is developing and testing an innovative advanced aerogel solid sorbent for coal-fired power plants. The aerogel sorbents have high surface area and porosity, unique and tailored pore size distribution, highly-stable functionality, and excellent hydrophobicity for resisting degradation from flue gas and its contaminants over

  19. FE0003537_UofOklahoma | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Next Generation Surfactants for Improved Chemical Flooding Technology Last Reviewed 12/15/2012 DE-FE0003537 Goal The principle objective of the project is to characterize and test current and next generation high performance surfactants for improved chemical flooding technology, focusing on reservoirs in Pennsylvanian age (Penn) sands. Performer Oklahoma University Enhanced Oil Recovery Design Center, Norman, OK Background Primary and secondary methods have produced approximately one-third of

  20. FE0006011-SkyResearch. | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Development of Real-Time Semi-autonomous Geophysical Data Acquisition and Processing System to Monitor Flood Performance Last Reviewed 6/26/2015 DE-FE0006011 Goal The objective of this project is to design, develop, and validate a real-time, semi-autonomous geophysical data acquisition and processing system using electromagnetic technology to monitor carbon-dioxide (CO2) flood performance. Performers White River Technologies, Ashland, OR 97520 University of British Columbia (UBC) Vancouver,

  1. FWP04FE12 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Power Generation in Natural Gas Pipelines FWP04FE12 Goal: Los Alamos National Laboratory (LANL) will evaluate the concept of power generation from natural gas flow in a pipeline, using flow-induced vibration in the system. Mechanical vibration produced in the pipeline may be converted to useful electrical power using piezoelectric transduction. This project will evaluate the feasibility of the concept and the specific technical issues related to generating power with this technique. LANL will

  2. Thermodynamic studies of CaLaFe??O??(s)

    SciTech Connect (OSTI)

    Rakshit, S.K.; Parida, S.C.; Lilova, Kristina; Navrotsky, Alexandra

    2013-05-01

    Thermodynamic studies on CaLaFe??O??(s) were carried out using Knudsen effusion mass spectrometry and calorimetry, viz. differential scanning calorimetry and high temperature oxide melt solution calorimetry. Standard molar Gibbs free energy of formation (?{sub f}G?{sub m}), enthalpy of formation and heat capacity (C?{sub ?,m}) of the compound were calculated as a function of temperature for the first time. C?{sub ?,m}(CaLaFe??O??) was determined and used for second law analysis, from which enthalpy and entropy of formation of the compound were calculated and the respective values are: ?{sub f}H?{sub m}(298.15 K)/kJ mol?=-6057(8) and S?{sub m}(298.15 K)/J K? mol?=427(5). ?{sub f}H?{sub m}(298.15 K)/kJ mol?: -6055(6) was also calculated using oxide melt solution calorimetry, which is in close agreement with the second law value. A heat capacity anomaly was also observed at T=684 K. A table of thermodynamic data from 298.15 K to 1000 K for CaLaFe??O??(s) was also constructed to represent an optimized set of data. - graphical abstract: Variation of standard molar heat capacities of CaLaF??O??(s) and MFe??O??(s) (M=Sr, Ba and Pb) as a function of temperature. Highlights: Thermodynamic studies on CaLaFe??O??(s) were performed using KEQMS and solution calorimetry. It was synthesized using gel combustion route and characterized by XRD technique. The compound is magnetic in nature and shows a heat capacity anomaly at 684 K. Thermodynamic table was constructed from 298 K to 1000 K.

  3. FE Press Releases and Techlines | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Press Releases and Techlines FE Press Releases and Techlines RSS December 2, 2015 DOE Selects Projects To Enhance Its Research into Recovery of Rare Earth Elements from Coal and Coal Byproducts The U.S. Department of Energy's (DOE) National Energy Technology Laboratory (NETL) has selected 10 projects to receive funding for research in support of the lab's program on Recovery of Rare Earth Elements from Coal and Coal Byproducts. The selected research projects will further program goals by

  4. Facile synthesis and characterization of ZnFe{sub 2}O{sub 4}/{alpha}-Fe{sub 2}O{sub 3} composite hollow nanospheres

    SciTech Connect (OSTI)

    Shen, Yu [Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024 (China) [Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024 (China); School of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028 (China); Li, Xinyong, E-mail: xyli@dlut.edu.cn [Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024 (China) [Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024 (China); Department of Chemical Engineering, Curtin University, Perth, WA 6845 (Australia); Zhao, Qidong; Hou, Yang [Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024 (China)] [Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024 (China); Tade, Moses [Department of Chemical Engineering, Curtin University, Perth, WA 6845 (Australia)] [Department of Chemical Engineering, Curtin University, Perth, WA 6845 (Australia); Liu, Shaomin, E-mail: Shaomin.Liu@curtin.edu.au [Department of Chemical Engineering, Curtin University, Perth, WA 6845 (Australia)] [Department of Chemical Engineering, Curtin University, Perth, WA 6845 (Australia)

    2011-12-15

    Highlights: Black-Right-Pointing-Pointer ZnFe{sub 2}O{sub 4}/{alpha}-Fe{sub 2}O{sub 3} composite hollow nanospheres were successfully synthesized via a facile method. Black-Right-Pointing-Pointer Detailed structural, morphology and the phase composition were studied. Black-Right-Pointing-Pointer The incorporation of ZnFe{sub 2}O{sub 4} and {alpha}-Fe{sub 2}O{sub 3} gives an appropriate band gap value to utilize solar energy. -- Abstract: ZnFe{sub 2}O{sub 4}/{alpha}-Fe{sub 2}O{sub 3} composite hollow nanospheres were successfully fabricated via a facile one-pot solvothermal method, utilizing polyethylene glycol as soft template. X-ray diffraction and scanning electron microscopy analysis revealed that the prepared nanospheres with cubic spinel and rhombohedra composite structure had a uniform diameter of about 370 nm, and the hollow structure could be further confirmed by transmission electron microscopy. Energy dispersive X-ray, X-ray photoelectron spectroscopy and Fourier transform infrared techniques were also applied to characterize the elemental composition and chemical bonds in the hollow nanospheres. The ZnFe{sub 2}O{sub 4}/{alpha}-Fe{sub 2}O{sub 3} composite hollow nanospheres show attractive light absorption property for potential applications in electronics, optics, and catalysis.

  5. MAS NMR Study of the Metastable Solid Solutions Found in the LiFePO4/FePO4 System

    SciTech Connect (OSTI)

    Cabana, Jordi; Shirakawa, Junichi; Chen, Guoying; Richardson, Thomas; Grey, Clare P.

    2009-10-09

    Li and 3IP NMR experiments were conducted on a series of single- or two-phase samples in the LiFePCvFePCM system with different overall lithium contents, and containing the two end-members and/or two metastable solid solution hases, Lio.6FeP04 or Lio.34FeP04. These experiments were carried out at different temperatures in order to search for vacancy/charge ordering and ion/electron mobility in the metastable phases. Evidence for Li+-Fe2+ interactions was bserved for both Lio.6FeP04 and Lio.34FePC>4. The strength of this interaction leads to the formation of LiFePCvlike clusters in the latter, as shown by the room temperature data. Different motional processes are proposed to exist as the temperature is increased and various scenarios are discussed. While concerted lithium-electron hopping and/or correlations explains the data below 125C, evidence for some uncorrelated motion is found at higher temperatures, together with the onset of phase mixing.

  6. In situ observation of defect annihilation in Kr ion-irradiated bulk Fe/amorphous-Fe 2 Zr nanocomposite alloy

    SciTech Connect (OSTI)

    Yu, K. Y.; Fan, Z.; Chen, Y.; Song, M.; Liu, Y.; Wang, H.; Kirk, M. A.; Li, M.; Zhang, X.

    2014-08-26

    Enhanced irradiation tolerance in crystalline multilayers has received significant attention lately. However, little is known on the irradiation response of crystal/amorphous nanolayers. We report on in situ Kr ion irradiation studies of a bulk Fe96Zr4 nanocomposite alloy. Irradiation resulted in amorphization of Fe2Zr and formed crystal/amorphous nanolayers. ?-Fe layers exhibited drastically lower defect density and size than those in large ?-Fe grains. In situ video revealed that mobile dislocation loops in ?-Fe layers were confined by the crystal/amorphous interfaces and kept migrating to annihilate other defects. This study provides new insights on the design of irradiation-tolerant crystal/amorphous nanocomposites.

  7. The lick AGN monitoring project 2011: Fe II reverberation from the outer broad-line region

    SciTech Connect (OSTI)

    Barth, Aaron J.; Cooper, Michael C.; Pancoast, Anna; Treu, Tommaso; Bennert, Vardha N.; Brewer, Brendon J.; Canalizo, Gabriela; Filippenko, Alexei V.; Li, Weidong; Cenko, S. Bradley; Clubb, Kelsey I.; Gates, Elinor L.; Greene, Jenny E.; Malkan, Matthew A.; Sand, David J.; Stern, Daniel; Assef, Roberto J.; Woo, Jong-Hak; Bae, Hyun-Jin; Buehler, Tabitha; and others

    2013-06-01

    The prominent broad Fe II emission blends in the spectra of active galactic nuclei have been shown to vary in response to continuum variations, but past attempts to measure the reverberation lag time of the optical Fe II lines have met with only limited success. Here we report the detection of Fe II reverberation in two Seyfert 1 galaxies, NGC 4593 and Mrk 1511, based on data from a program carried out at Lick Observatory in Spring 2011. Light curves for emission lines including H? and Fe II were measured by applying a fitting routine to decompose the spectra into several continuum and emission-line components, and we use cross-correlation techniques to determine the reverberation lags of the emission lines relative to V-band light curves. In both cases, the measured lag (?{sub cen}) of Fe II is longer than that of H?, although the inferred lags are somewhat sensitive to the choice of Fe II template used in the fit. For spectral decompositions done using the Fe II template of Vron-Cetty et al., we find ?{sub cen}(Fe II)/?{sub cen}(H?) = 1.9 0.6 in NGC 4593 and 1.5 0.3 in Mrk 1511. The detection of highly correlated variations between Fe II and continuum emission demonstrates that the Fe II emission in these galaxies originates in photoionized gas, located predominantly in the outer portion of the broad-line region.

  8. Oxide Shell Reduction and Magnetic Property Changes in Core-Shell Fe Nanoclusters under Ion Irradiation

    SciTech Connect (OSTI)

    Sundararajan, Jennifer A.; Kaur, Maninder; Jiang, Weilin; McCloy, John S.; Qiang, You

    2014-02-12

    Ion irradiation effects are studied on the Fe-based core-shell nanocluster (NC) films with core as Fe and shell as Fe3O4/FeO. These NC films were were deposited on Si substrates to thickness of ~0.5 micrometers using a NC deposition system. The films were irradiated at room temperature with 5.5 MeV Si2+ ions to ion fluences of 1015 and 1016 ions/cm2. It is found that the irradiation induces grain growth, Fe valence reduction in the shell, and crystallization of Fe3N. The nature and mechanism of oxide shell reduction and composition dependence after irradiation were studied by synthesizing additional NC films of Fe3O4 and FeO+Fe3N and irradiating them under the same conditions. The presence of nanocrystalline Fe is found to be a major factor for the oxide shell reduction. The surface morphologies of these films show dramatic changes in the microstructures due to cluster growth and agglomeration as a result of ion irradiation.

  9. The reaction mechanism of FeSb2 as anode for sodium-ion batteries

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Baggetto, Loic; Hah, Hien-Yoong; Johnson, Prof. Dr. Charles E.; Bridges, Craig A; Johnson, Jackie A.; Veith, Gabriel M

    2014-01-01

    The electrochemical reaction of FeSb2 with Na is reported for the first time. The first discharge (sodiation) potential profile of FeSb2 is characterized by a gentle slope centered at 0.25 V. During charge (Na removal) and the subsequent discharge, the main reaction takes place near 0.7 V and 0.4 V, respectively. The reversible storage capacity amounts to 360 mA h g1, which is smaller than the theoretical value of 537 mA h g1. The reaction, studied by ex situ and in situ X-ray diffraction, is found to proceed by the consumption of crystalline FeSb2 to form an amorphous phase. Uponmore » further sodiation, the formation of nanocrystalline Na3Sb domains is evidenced. During desodiation, Na3Sb domains convert into an amorphous phase. The chemical environment of Fe, probed by 57Fe Mo ssbauer spectroscopy, undergoes significant changes during the reaction. During sodiation, the well-resolved doublet of FeSb2 with an isomer shift around 0.45 mm s1 and a quadrupole splitting of 1.26 mm s1 is gradually converted into a doublet line centered at about 0.15 mm s1 along with a singlet line around 0 mm s1. The former signal results from the formation of a Fe-rich FexSb alloy with an estimated composition of Fe4Sb while the latter signal corresponds to superparamagnetic Fe due to the formation of nanosized pure Fe domains. Interestingly the signal of Fe4Sb remains unaltered during desodiation. This mechanism is substantially different than that observed during the reaction with Li. The irreversible formation of a Fe-rich Fe4Sb alloy and the absence of full desodiation of Sb domains explain the lower than theoretical practical storage capacity.« less

  10. Temperature dependence of the coercive force in Nd sub 4 Fe sub 77 B sub 19

    SciTech Connect (OSTI)

    Eckert, D.; Muller, K.H.; Handstein, A.; Schneider, J. ); Grossinger, R.; Krewenka, R. )

    1990-09-01

    The temperature dependence of coercivity {sub J}H{sub c} of Fe{sub 3}B-based Nd{sub 4}Fe{sub 77}B{sub 19} permanent magnetic materials is analysed. The coercivity of these melt-spun materials vanishes above the Curie temperature of the minor phase Nd{sub 2}Fe{sub 14}B. As well as melt-spun Nd-rich magnets, Nd{sub 4}Fe{sub 77}B{sub 19} magnets show a maximum in the {sub J}H{sub c} versus T curve at low temperatures. The coercivity of these melt-spun materials has a smaller temperature coefficient than sintered Nd-rich NdFeB magnets. The relation of the observed T- dependence of {sub J}H{sub c}, to the anisotropy field H{sub A}(T) of Nd{sub 2}Fe{sub 14}B is discussed.

  11. Microsoft Word - FE PSRP 08-19-09 _3_.doc

    Broader source: Energy.gov (indexed) [DOE]

    PSRP Name: Fossil Energy Research & Development (R&D) PSRP Lead Program Office and/or Laboratory/Site Office: Office of Fossil Energy (FE)/National Energy Technology Laboratory (NETL) PSRP Lead Manager: Victor K. Der Phone: (202) 586-6660 E-mail: victor.der@hq.doe.gov Address: 1000 Independence Avenue, SW; Washington DC 20585 Does this program align with an existing PART program? Y Does this program align with an existing CFDA program? N 1. Objectives Program Purpose The American

  12. de-fe0010808-uta | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New Generation Hydraulic Fracturing Model for Horizontal Wells Last Reviewed 12/2/2015 DE-FE0010808 Goal The project goal is to develop a "new generation" hydraulic fracturing model that will, for the first time, provide an operator with the ability to model the simultaneous propagation of non-planar hydraulic fractures from multiple perforation clusters and create a realistic picture of the stimulated rock volume (SRV) around horizontal wells. The model will be used to simulate the

  13. Cu-Ni-Fe anodes having improved microstructure

    DOE Patents [OSTI]

    Bergsma, S. Craig; Brown, Craig W.

    2004-04-20

    A method of producing aluminum in a low temperature electrolytic cell containing alumina dissolved in an electrolyte. The method comprises the steps of providing a molten electrolyte having alumina dissolved therein in an electrolytic cell containing the electrolyte. A non-consumable anode and cathode is disposed in the electrolyte, the anode comprised of Cu--Ni--Fe alloys having single metallurgical phase. Electric current is passed from the anode, through the electrolyte to the cathode thereby depositing aluminum on the cathode, and molten aluminum is collected from the cathode.

  14. Oxidation sulfidation resistance of Fe-Cr-Ni alloys

    DOE Patents [OSTI]

    Natesan, Ken (Naperville, IL); Baxter, David J. (Woodridge, IL)

    1984-01-01

    High temperature resistance of Fe-Cr-Ni alloy compositions to oxidative and/or sulfidative conditions is provided by the incorporation of about 1-8 wt. % of Zr or Nb and results in a two-phase composition having an alloy matrix as the first phase and a fine grained intermetallic composition as the second phase. The presence and location of the intermetallic composition between grains of the matrix provides mechanical strength, enhanced surface scale adhesion, and resistance to corrosive attack between grains of the alloy matrix at temperatures of 500.degree.-1000.degree. C.

  15. Improved oxidation sulfidation resistance of Fe-Cr-Ni alloys

    DOE Patents [OSTI]

    Natesan, K.; Baxter, D.J.

    1983-07-26

    High temperature resistance of Fe-Cr-Ni alloy compositions to oxidative and/or sulfidative conditions is provided by the incorporation of about 1 to 8 wt % of Zr or Nb and results in a two-phase composition having an alloy matrix as the first phase and a fine grained intermetallic composition as the second phase. The presence and location of the intermetallic composition between grains of the matrix provides mechanical strength, enhanced surface scale adhesion, and resistance to corrosive attack between grains of the alloy matrix at temperatures of 500 to 1000/sup 0/C.

  16. Microsoft Word - chapter FeCrMo_ver2.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Reference on Hydrogen Compatibility of Materials Low-Alloy Ferritic Steels: Tempered Fe-Cr-Mo Alloys (code 1211) Prepared by: B.P. Somerday, Sandia National Laboratories Editors C. San Marchi B.P. Somerday Sandia National Laboratories This report may be updated and revised periodically in response to the needs of the technical community; up-to-date versions can be requested from the editors at the address given below or downloaded at http://www.ca.sandia.gov/matlsTechRef/ . The success of this

  17. Long Term Applications Received by DOE/FE to Export

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Term Applications Received by DOE/FE to Export Domestically Produced LNG from the Lower-48 States (as of December 4, 2015) All Changes Since December 2, 2015 Update Are In Red 1 Company Quantity (a) FTA Applications (b) (Docket Number) Non-FTA Applications (c) (Docket Number) Sabine Pass Liquefaction, LLC 2.2 billion cubic feet per day (Bcf/d) (d) Approved (10-85-LNG) Approved (F) (10-111-LNG) Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC 1.4 Bcf/d (d) Approved (10-160-LNG) Approved

  18. DE-FE00013123 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Pilot Scale Evaluation of an Advanced Carbon Sorbent-Based Process for Post-combustion CO2 Capture Project No.: DE-FE00013123 SRI is incorporating an advanced carbon capture sorbent-based process in a 0.5 MWe slipstream pilot plant that will reduce the parasitic plant load by using a CO2 capture sorbent requiring a reduced amount of steam. The process is based on advanced carbon sorbents having a low heat of adsorption, high CO2 adsorption capacity, and excellent selectivity. Design and

  19. DE-FE0002911 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    DOE/NETL Methane Hydrate Projects Natural Gas Hydrates in Permafrost and Marine Settings: Resources, Properties, and Environmental Issues Last Reviewed 12/1/2015 DE-FE0002911 Goal The objective of this DOE-US Geological Survey(USGS) Interagency Agreement (IA) is to provide world-class expertise and research in support of the goals of the 2005 Energy Act for National Methane Hydrates R&D, the DOE-led U.S. interagency roadmap for gas hydrates research, and elements of the USGS mission related

  20. DE-FE0010799 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Small Molecular Associative Carbon Dioxide (CO2) Thickeners for Improved Mobility Control Last Reviewed 12/4/2015 DE-FE0010799 Goal The overall research goal is to test the effectiveness of various CO2 thickener compounds that can induce very large changes in CO2 viscosity at typical injection and reservoir conditions associated with Carbon Dioxide Enhanced Oil Recovery (CO2-EOR). The study consists of two phases. Phase 1 objectives are (1) to obtain commitment letters from CO2-EOR operators to

  1. DE-FE0012926 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    An Advanced Catalytic Solvent for Lower Cost Post-Combustion CO2 Capture in a Coal-fired Power Plant Project No.: DE-FE0012926 The University of Kentucky is testing an advanced catalyzed amine solvent coupled with a membrane dewatering component. The system will be used with a heat-integration process to reduce the energy of regeneration and show higher mass transfer, and lower capital cost, for post-combustion CO2 capture. A homogeneous catalyst is being used for enhanced scrubber kinetics.

  2. DE-FE0012959 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Development of Mixed-Salt Technology for Carbon Dioxide Capture from Coal Power Plants Project No.: DE-FE0012959 SRI is testing a newly developed, low-cost, ammonia-based, mixed-salt, solvent CO2 capture technology at the bench-scale. This technology can be used in existing or new pulverized coal power plants. The project aims to show that the process can capture CO2 at high efficiency (> 90 percent) with high CO2 loading (> 10 weight percent) and require less than 2 gigajoules per tonne

  3. DE-FE0012965 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Development of a Precombustion Carbon Dioxide Capture Process Using High Temperature Polybenzimidazole Hollow-Fiber Membrane Project No.: DE-FE0012965 SRI is conducting a bench-scale testing of a CO2 capture system using a high-temperature polymer-membrane-based gas separator. The system was developed at bench-scale as part of a previous project, and is being optimized for integration into an IGCC plant. Membrane modules of sufficient capacity will be fabricated to process a synthesis gas

  4. DE-FE0013687 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bench-Scale Process for Low-Cost Carbon Dioxide (CO2) Capture Using a Phase-Changing Absorbent Project No.: DE-FE0013687 GE global is constructing and operating a continuous, bench-scale CO2 capture system that employs a phase-changing silicone solvent . Experimental data obtained at the laboratory scale in a previous ARPA-E funded project, including mass transfer and kinetic information, is being used to determine process scalability and perform a techno-economic assessment of the commercial

  5. DE-FE0013755 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Pilot-Scale Silicone Process for Low-Cost Carbon Dioxide Capture Project No.: DE-FE0013755 General Electric is using a novel silicone solvent to capture CO2 with a continuous pilot-scale system at the National Carbon Capture Center (NCCC) test facility. This effort is based on a previous project focused on development at bench-scale. The system integrates unit operations unique to the aminosilicone-based CO2 capture process with existing infrastructure at NCCC. It will be sized appropriately to

  6. DE-FE0013865 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bench-Scale Development of a Non-Aqueous Solvent (NAS) CO2 Capture Process for Coal-Fired Power Plants Project No.: DE-FE0013865 Research Triangle Institute (RTI) is continuing the development process for a non-aqueous solvent (NAS)-based CO2 capture process that was originated at laboratory scale under an ARPA-E project. This project will conduct bench-scale testing to show the potential of the technology to reduce the parasitic energy penalty. Key technical and economic challenges and

  7. FWP05FE03 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Multi-Purpose Sensor for Detecting Pipeline Defects FWP05FE03 Goal: The goal of this project is to develop a multi-purpose sensor to be run inside a pipeline that can determine ovality of the pipe, structural defects in the pipe, wall thickness, the velocity/flow rate of gas within the pipe, and potentially detect external defects. The sensor will be integrated with an autonomous robotic platform providing a flexible in-line natural gas pipeline inspection tool. Background: The Los Alamos

  8. DE-FE0004001 Full text of Clauses

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PART I SECTION A - SOLICITATION/CONTRACT FORM OMB Approval No. 9000-0008 SOLICITATION, OFFER AND AWARD 1. RATING PAGE OF 1 246 PAGES 2. CONTRACT NO. DE-FE0004001 3. SOLICITATION NO. DE-SO26-08000664 4. TYPE OF SOLICITATION SEALED BID (IFB) X NEGOTIATED (RFP) 5. DATE ISSUED January 30, 2009 6. REQUISITION/PURCHASE NO. 26-08NT007047 7. ISSUED BY CODE 8. ADDRESS OFFER TO (If other than Item 7) U.S. Department of Energy National Energy Technology Laboratory PO Box 880, 3610 Collins Ferry Road

  9. Long Term Applications Received by DOE/FE to Export

    Energy Savers [EERE]

    Term Applications Received by DOE/FE to Export Domestically Produced LNG from the Lower-48 States (as of March 18, 2016) All Changes Since February 23, 2016 Update Are In Red 1 Company Quantity (a) FTA Applications (b) (Docket Number) Non-FTA Applications (c) (Docket Number) Sabine Pass Liquefaction, LLC 2.2 billion cubic feet per day (Bcf/d) (d) Approved (10-85-LNG) Approved (F) (10-111-LNG) Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC 1.4 Bcf/d (d) Approved (10-160-LNG) Approved (F)

  10. Active eutectoid decomposition in Zr-3 wt.% Fe

    SciTech Connect (OSTI)

    Kumar, L.; Ramanujan, R.V.; Tewari, R.; Mukhopadhyay, P.; Banerjee, S.

    1999-02-19

    In the work reported here, the microstructural features associated with the active eutectoid decomposition of a near eutectoid alloy (Zr-3 wt.%Fe) on {beta} quenching were examined. The effects of aging after {beta} quenching, and of furnace cooling from the {beta} phase field, on the microstructure of the alloy were also studied. The microstructural characterization was carried out using optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM). The room temperature mechanical properties corresponding to some of the microstructures were evaluated by mechanical testing.

  11. Long Term Applications Received by DOE/FE to Export

    Office of Environmental Management (EM)

    Term Applications Received by DOE/FE to Export Domestically Produced LNG from the Lower-48 States (as of February 23, 2016) All Changes Since February 18, 2016 Update Are In Red 1 Company Quantity (a) FTA Applications (b) (Docket Number) Non-FTA Applications (c) (Docket Number) Sabine Pass Liquefaction, LLC 2.2 billion cubic feet per day (Bcf/d) (d) Approved (10-85-LNG) Approved (F) (10-111-LNG) Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC 1.4 Bcf/d (d) Approved (10-160-LNG) Approved

  12. Pervasive faint Fe XIX emission from a solar active region observed with

    Office of Scientific and Technical Information (OSTI)

    EUNIS-13: Evidence for nanoflare heating (Journal Article) | SciTech Connect Pervasive faint Fe XIX emission from a solar active region observed with EUNIS-13: Evidence for nanoflare heating Citation Details In-Document Search Title: Pervasive faint Fe XIX emission from a solar active region observed with EUNIS-13: Evidence for nanoflare heating We present spatially resolved EUV spectroscopic measurements of pervasive, faint Fe XIX 592.2 Å line emission in an active region observed during

  13. Microbial Lithotrophic Oxidation of Structural Fe(II) in Biotite (Journal

    Office of Scientific and Technical Information (OSTI)

    Article) | SciTech Connect Microbial Lithotrophic Oxidation of Structural Fe(II) in Biotite Citation Details In-Document Search Title: Microbial Lithotrophic Oxidation of Structural Fe(II) in Biotite Microorganisms are known to participate in the weathering of primary phyllosilicate minerals through production of organic ligands and acids, and through uptake of products of weathering. Here we show that a lithotrophic Fe(II)-oxidizing, nitrate-reducing enrichment culture (Straub, 6 1996) can

  14. Site-specific electronic configurations of Fe 3d states by energy loss by channeled electrons

    SciTech Connect (OSTI)

    Tatsumi, Kazuyoshi; Muto, Shunsuke; Nishida, Ikuo; Rusz, Jan

    2010-05-17

    Site-specific configurations of Fe 3d electrons in a spinel ferrite were investigated by electron energy loss spectroscopy under electron channeling conditions. Site-specific spectra were extracted by applying a multivariate curve resolution (MCR) technique to the data set. An electronic difference in the Fe sites caused by ligand field splitting of trivalent Fe was probed. This demonstrated the promise of site-specific valence and spin state analysis in spintronics applications of spinel ferrites.

  15. SEMI-ANNUAL REPORTS FOR - EOS LNG - FTA - FE DKT. NO. 13-115-LNG - Order

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3364 | Department of Energy - EOS LNG - FTA - FE DKT. NO. 13-115-LNG - Order 3364 SEMI-ANNUAL REPORTS FOR - EOS LNG - FTA - FE DKT. NO. 13-115-LNG - Order 3364 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR BARCA LNG - FTA - FE DKT. NO. 13-117-LNG - ORDER 3365

  16. SEMI-ANNUAL REPORTS FOR BARCA LNG - FTA - FE DKT. NO. 13-117-LNG - ORDER

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3365 | Department of Energy BARCA LNG - FTA - FE DKT. NO. 13-117-LNG - ORDER 3365 SEMI-ANNUAL REPORTS FOR BARCA LNG - FTA - FE DKT. NO. 13-117-LNG - ORDER 3365 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR - EOS LNG - FTA - FE DKT. NO. 13-115-LNG - Order 3364

  17. Ontario Power Generation Motion to Intervene & Comments in FE Docket No.

    Energy Savers [EERE]

    99-1 | Department of Energy Ontario Power Generation Motion to Intervene & Comments in FE Docket No. 99-1 Ontario Power Generation Motion to Intervene & Comments in FE Docket No. 99-1 Ontario Power Generation hereby moves to intervene in, and comments on, the DOE's proposed open access requirements for International Electric Transmission Facilities. PDF icon Ontario Power Company Motion to Intervene & Comments in FE Docket No. 99-1 More Documents & Publications Motion to

  18. FE Teams Earn Secretary of Energy Achievement Awards | Department of Energy

    Office of Environmental Management (EM)

    FE Teams Earn Secretary of Energy Achievement Awards FE Teams Earn Secretary of Energy Achievement Awards October 4, 2012 - 1:00pm Addthis Washington, DC - Secretary of Energy Steven Chu today honored two Office of Fossil Energy (FE) groups - the National Energy Technology Laboratory's (NETL) Coronary Stents Team and the Strategic Petroleum Reserve's (SPR) 2011 Drawdown Team - with Secretary of Energy Achievement Awards for exceptional performance in carrying out the Department's mission. Small

  19. Comments of the Northeast Power Coordinating Council FE Docket No. 99-1 |

    Office of Environmental Management (EM)

    Department of Energy the Northeast Power Coordinating Council FE Docket No. 99-1 Comments of the Northeast Power Coordinating Council FE Docket No. 99-1 On July 21, 1999 the Department of Energy, hereinafter "DOE" or the "Department" issued its Notice of Proposed Amendment to the Predidential Permits and Export Authorizations and Delegation and Assignment to the Federal Energy Regulatory Commission. PDF icon Comments of the Northeast Power Coordinating Council FE Docket

  20. Effect of CoFe insertion in Co{sub 2}MnSi/CoFe/n-GaAs junctions on spin injection properties

    SciTech Connect (OSTI)

    Ebina, Yuya; Akiho, Takafumi; Liu, Hong-xi; Yamamoto, Masafumi; Uemura, Tetsuya

    2014-04-28

    The CoFe thickness (t{sub CoFe}) dependence of spin injection efficiency was investigated for Co{sub 2}MnSi/CoFe/n-GaAs junctions. The ?V{sub NL}/I value, which is a measure of spin injection efficiency, strongly depended on t{sub CoFe}, where ?V{sub NL} is the amplitude of a nonlocal spin-valve signal, and I is an injection current. Importantly, the maximum value of ?V{sub NL}/I for a Co{sub 2}MnSi/CoFe/n-GaAs junction was one order of magnitude higher than that for a CoFe/n-GaAs junction, indicating that a Co{sub 2}MnSi electrode works as a highly polarized spin source. No clear spin signal, on the other hand, was observed for a Co{sub 2}MnSi/n-GaAs junction due to diffusion of Mn atoms into the GaAs channel. Secondary ion mass spectrometry analysis indicated that the CoFe insertion effectively suppressed the diffusion of Mn into GaAs, resulting in improved spin injection properties compared with those for a Co{sub 2}MnSi/n-GaAs junction.

  1. Constructing hierarchical interfaces: TiO2-supported PtFe-FeOx nanowires for room temperature CO oxidation

    SciTech Connect (OSTI)

    Zhu, Huiyuan; Wu, Zili; Dong, Su; Veith, Gabriel M; Lu, Hanfeng; Zhang, Pengfei; Chai, Songhai; Dai, Sheng

    2015-08-05

    This is a report of a facile approach to constructing catalytic active hierarchical interfaces in one-dimensional (1D) nanostructure, exemplified by the synthesis of TiO2-supported PtFeFeOx nanowires (NWs). The hierarchical interface, constituting atomic level interactions between PtFe and FeOx within each NW and the interactions between NWs and support (TiO2), enables CO oxidation with 100% conversion at room temperature. We identify the role of the two interfaces by probing the CO oxidation reaction with isotopic labeling experiments. Both the oxygen atoms (Os) in FeOx and TiO2 participate in the initial CO oxidation, facilitating the reaction through a redox pathway. Moreover, the intact 1D structure leads to the high stability of the catalyst. After 30 h in the reaction stream, the PtFeFeOx/TiO2 catalyst exhibits no activity decay. These results provide a general approach and new insights into the construction of hierarchical interfaces for advanced catalysis.

  2. Magnetic Interaction Reversal In Watermelon Nanostructured Cr-doped Fe Nanoclusters

    SciTech Connect (OSTI)

    Kaur, Maninder; Dai, Qilin; Bowden, Mark E.; Engelhard, Mark H.; Wu, Yaqiao; Tang, Jinke; Qiang, You

    2013-11-11

    Cr-doped core-shell Fe/Fe-oxide nanoclusters (NCs) were synthesized at varied atomic percentages of Cr from 0 at. % to 8 at. %. The low concentrations of Cr (<10 at. %) were selected in order to inhibit the complete conversion of the Fe-oxide shell to Cr2O3 and the Fe core to FeCr alloy. The magnetic interaction in Fe/Fe-oxide NCs (rv25 nm) can be controlled by antiferromagnetic Cr-dopant. We report the origin of r-FeCr phase at very low Cr concentration (2 at. %) unlike in previous studies, and the interaction reversal from dipolar to exchange interaction in watermelon-like Cr-doped core-shell NCs. The giant magnetoresistance (GMR) effect,1,2 where an antiferromagnetic (AFM) exchange coupling exists between two ferromagnetic (FM) layers separated by a certain type of magnetic or non-magnetic spacer,3 has significant potential for application in the magnetic recording industry. Soon after the discovery of the GMR, the magnetic properties of multilayer systems (FeCr) became a subject of intensive study. The application of bulk iron-chromium (Fe-Cr) alloys has been of great interest, as these alloys exhibit favorable prop- erties including corrosion resistance, high strength, hardness, low oxidation rate, and strength retention at elevated temper- ature. However, the structural and magnetic properties of Cr-doped Fe nanoclusters (NCs) have not been investigated in-depth. Of all NCs, Fe-based clusters have unique magnetic properties as well as favorable catalytic characteristics in reactivity, selectivity, and durability.4 The incorporation of dopant of varied type and concentration in Fe can modify its chemical ordering, thereby optimizing its electrical, optical, and magnetic properties and opening up many new applications. The substitution of an Fe atom (1.24 A˚ ) by a Cr atom (1.25 A˚ ) can easily modify the magnetic properties, since (i) the curie temperature (Tc ) of Fe is 1043 K, while Cr is an itinerant AFM with a bulk Neel temperature TN =311 K, and (ii) Fe and Cr share the same crystal structure (bcc) with only 0.5% difference between their lattice constants.

  3. Microsoft Word - santa-fe-county-fact-sheet-2013-2014.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the following schools in Santa Fe County participated in one or more of LANL's regional education programs. * Academy for Technology and the Classics * Acequia Madre Elementary *...

  4. The thermal equation of state of (Mg, Fe)SiO[subscript 3] bridgmanite...

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Search Results Journal Article: The thermal equation of state of (Mg, Fe)SiOsubscript 3 bridgmanite (perovskite) and implications for lower mantle structures ...

  5. Complex temperature evolution of the electronic structure of CaFe{sub

    Office of Scientific and Technical Information (OSTI)

    2}As{sub 2} (Journal Article) | SciTech Connect Complex temperature evolution of the electronic structure of CaFe{sub 2}As{sub 2} Citation Details In-Document Search Title: Complex temperature evolution of the electronic structure of CaFe{sub 2}As{sub 2} Employing high resolution photoemission spectroscopy, we investigate the temperature evolution of the electronic structure of CaFe{sub 2}As{sub 2}, which is a parent compound of high temperature superconductors-CaFe{sub 2}As{sub 2} exhibits

  6. Characterization of a Genuine S=1/2 Fe(V) Complex

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Characterization of a Genuine S=1/2 Fe(V) Complex Núria Aliaga-Alcalde,1 Serena DeBeer George,2 Bernd Mienert,1 Eckhard Bill,1 Karl Wieghardt1 and Frank Neese1 1Max Planck Institut für Bioanorganische Chemie, Mülheim an der Ruhr, Germany 2Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, CA High-valent Fe(IV) and Fe(V) intermediates are invoked in the catalytic mechanisms of both heme and non-heme iron enzymes.[1, 2] Over the last several years, many Fe(IV)-oxo

  7. SEMI-ANNUAL REPORTS FOR - CORPUS CHRISTI LIQUEFACTION, LLC - FE DKT. NO.

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    15-97-LNG - ORDER 3699 | Department of Energy CORPUS CHRISTI LIQUEFACTION, LLC - FE DKT. NO. 15-97-LNG - ORDER 3699 SEMI-ANNUAL REPORTS FOR - CORPUS CHRISTI LIQUEFACTION, LLC - FE DKT. NO. 15-97-LNG - ORDER 3699 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR CHENIERE MARKETING, LLC AND CORPUS CHRISTI LIQUEFACTION, LLC (NFTA) - FE DKT. NO. 12-97-LNG - ORDER 3638 SEMI-ANNUAL REPORTS FOR FREEPORT LNG EXPANSION L.P. & FLNG LIQUEFACTION, LLC - FE DKT.

  8. SEMI-ANNUAL REPORTS FOR ALASKA LNG PROJECT LLC - FE DKT. NO. 14-96-LNG -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORDER NO. 3554 | Department of Energy ALASKA LNG PROJECT LLC - FE DKT. NO. 14-96-LNG - ORDER NO. 3554 SEMI-ANNUAL REPORTS FOR ALASKA LNG PROJECT LLC - FE DKT. NO. 14-96-LNG - ORDER NO. 3554 PDF icon APRIL 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR ALASKA LNG PROJECT, LLC - FE DKT NO. 14-96-LNG - ORDER 3643 (NFTA) SEMI-ANNUAL REPORT - PORT ARTHUR LNG - DKT. NO. 15-53-LNG - ORD. 3698 SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO.

  9. SEMI-ANNUAL REPORTS FOR AMERICAN LNG MARKETING LLC, FE DKT. 15-19-LNG -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORDER 3656 | Department of Energy AMERICAN LNG MARKETING LLC, FE DKT. 15-19-LNG - ORDER 3656 SEMI-ANNUAL REPORTS FOR AMERICAN LNG MARKETING LLC, FE DKT. 15-19-LNG - ORDER 3656 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR AMERICAN LNG MARKETING LLC - FTA - DKT. 14-209-LNG - ORDER NO. 3601 SEMI-ANNUAL REPORTS FOR Louisiana LNG Energy LLC - FE DKT. NO 14-19-LNG - ORDER 3482 SEMI-ANNUAL REPORTS FOR MAIN PASS ENERGY HUB, LLC - FE DKT. NO. 12-114-LNG - ORDER 3220

  10. SEMI-ANNUAL REPORTS FOR GASFIN DEVELOPMENT USA, LLC - FE DKT. NO. 13-06-LNG

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    - ORDER 3253 | Department of Energy GASFIN DEVELOPMENT USA, LLC - FE DKT. NO. 13-06-LNG - ORDER 3253 SEMI-ANNUAL REPORTS FOR GASFIN DEVELOPMENT USA, LLC - FE DKT. NO. 13-06-LNG - ORDER 3253 PDF icon April 2013 PDF icon October 2013 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 SEMI-ANNUAL REPORTS FOR - EOS LNG - FTA - FE DKT. NO.

  11. SEMI-ANNUAL REPORTS FOR GOLDEN PASS PRODUCTS LLC - FE DKT. NO. 12-88-LNG -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORDER 3147 | Department of Energy GOLDEN PASS PRODUCTS LLC - FE DKT. NO. 12-88-LNG - ORDER 3147 SEMI-ANNUAL REPORTS FOR GOLDEN PASS PRODUCTS LLC - FE DKT. NO. 12-88-LNG - ORDER 3147 PDF icon April 2013 PDF icon October 2013 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO.

  12. SEMI-ANNUAL REPORTS FOR JORDAN COVE ENERGY FE DKT. NO. 12-32-LNG - ORDER

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3413 | Department of Energy JORDAN COVE ENERGY FE DKT. NO. 12-32-LNG - ORDER 3413 SEMI-ANNUAL REPORTS FOR JORDAN COVE ENERGY FE DKT. NO. 12-32-LNG - ORDER 3413 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR JORDAN COVE ENERGY PROJECT, L.P. - FE DKT. NO. 11-127-LNG - ORDER 3041 SEMI-ANNUAL REPORTS FOR JORDAN COVE LNG L.P. - FE DKT. NO. 13-141-LNG - ORDER 3412 SEMI-ANNUAL REPORT - GULF LNG

  13. SEMI-ANNUAL REPORTS FOR SEAONE PASCAGOULA, LLC - FE DKT. NO. 14-83-LNG -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORDER 3555 | Department of Energy SEMI-ANNUAL REPORTS FOR SEAONE PASCAGOULA, LLC - FE DKT. NO. 14-83-LNG - ORDER 3555 SEMI-ANNUAL REPORTS FOR SEAONE PASCAGOULA, LLC - FE DKT. NO. 14-83-LNG - ORDER 3555 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SeaOne Gulfport, LLC (formerly known as SeaOne Pascaguola, LLC)- FE Dkt. No. 14-83-CGL SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 SEMI-ANNUAL REPORTS FOR AMERICAN LNG

  14. SEMI-ANNUAL REPORTS FOR TEXAS LNG - TEXAS LNG - FTA - FE DKT. NO.

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    13-160-LNG - 3443 | Department of Energy TEXAS LNG - TEXAS LNG - FTA - FE DKT. NO. 13-160-LNG - 3443 SEMI-ANNUAL REPORTS FOR TEXAS LNG - TEXAS LNG - FTA - FE DKT. NO. 13-160-LNG - 3443 PDF icon October 2014 PDF icon April 2015 More Documents & Publications SEMI-ANNUAL REPORTS - TEXAS LNG BROWNSVILLE LLC - FE DKT. 15-62-LNG - Order 3716 FTA SEMI-ANNUAL REPORTS FOR - STROM, INC. - FE DKT. NO. 14-56-LNG - ORDER NO 3537 SEMI-ANNUAL REPORTS FOR WALLER LNG SERVICES, LLC D/B/A WALLER POINT LNG

  15. Nanostructure evolution in joining of Al and Fe nanoparticles with femtosecond laser irradiation

    SciTech Connect (OSTI)

    Jiao, Z.; Huang, H.; Zhou, Y. E-mail: nzhou@uwaterloo.ca; Liu, L.; Hu, A.; Duley, W.; He, P. E-mail: nzhou@uwaterloo.ca

    2014-04-07

    The joining of Al-Fe nanoparticles (NPs) by femtosecond (fs) laser irradiation is reported in this paper. Fe and Al NPs were deposited on a carbon film in vacuum via fs laser ablation. Particles were then exposed to multiple fs laser pulses at fluences between 0.5 and 1.3?mJ/cm{sup 2}. Transmission Electron Microscopy (TEM) and Electron Diffraction X-ray observations indicate that Al and Fe NPs bond to each other under these conditions. For comparison, bonding of Al to Al and Fe to Fe NPs was also investigated. The nanostructure, as observed using TEM, showed that individual Al NPs were monocrystalline while individual Fe NPs were polycrystalline prior to joining and that these structures are retained after the formation of Al-Al and Fe-Fe NPs. Al-Fe NPs produced by fs laser joining exhibited a mixed amorphous and crystalline phase at the interface. Bonding is suggested to originate from intermixing within a region of high field intensity between particles.

  16. Structural and magnetic stability of Fe{sub 2}NiSi

    SciTech Connect (OSTI)

    Gupta, Dinesh C. Bhat, Idris Hamid Chauhan, Mamta

    2014-04-24

    Full-potential ab-initio calculations in the stable F-43m phase have been performed to investigate the structural and magnetic properties of Fe{sub 2}NiSi inverse Heusler alloys. The spin magnetic moment distributions show that present material is ferromagnetic in stable F-43m phase. Further, spin resolved electronic structure calculations show that the discrepancy in magnetic moments of Fe-I and Fe-II depend upon the hybridization of Fe with the main group element. It is found that the main group electron concentration is predominantly responsible in establishing the magnetic properties, formation of magnetic moments and the magnetic order for present alloy.

  17. Thickness-dependent coherent phonon frequency in ultrathin FeSe/SrTiO3

    Office of Scientific and Technical Information (OSTI)

    films (Journal Article) | SciTech Connect Thickness-dependent coherent phonon frequency in ultrathin FeSe/SrTiO3 films Citation Details In-Document Search Title: Thickness-dependent coherent phonon frequency in ultrathin FeSe/SrTiO3 films Ultrathin FeSe films grown on SrTiO3 substrates are a recent milestone in atomic material engineering due to their important role in understanding unconventional superconductivity in Fe-based materials. By using femtosecond time- and angle-resolved

  18. The Effects of Hydrocarbons on NOx Reduction over Fe-based SCR Catalyst |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Hydrocarbons on NOx Reduction over Fe-based SCR Catalyst The Effects of Hydrocarbons on NOx Reduction over Fe-based SCR Catalyst Study of effects of hydrocarbons on ammonia storage and NOx reduction over a commercial Fe-zeolite SCR catalyst to understand catalyst behaviors at low temperatures and improve NOx reduction performance and reduce system cost PDF icon deer10_lee.pdf More Documents & Publications Hydrocarbon Inhibition and HC Storage Modeling in Fe-Zeolite

  19. Ferro-Orbital Ordering Transition in Iron Telluride Fe1+yTe ...

    Office of Scientific and Technical Information (OSTI)

    frustration effects of the interstitial Fe decouple different orders, leading to a sequence of transitions. While the lattice distortion is closely followed by incommensurate...

  20. Motion to intervene of Consumers Energy Company. FE Docket No. 99-1 |

    Office of Environmental Management (EM)

    Department of Energy intervene of Consumers Energy Company. FE Docket No. 99-1 Motion to intervene of Consumers Energy Company. FE Docket No. 99-1 CECo is a public utility rendering electric service to over 1.5 million residential, commercial, and industrial customers in the lower peninsula of the state of Michigan. PDF icon Motion to intervene of Consumers Energy Company. FE Docket No. 99-1 More Documents & Publications Ontario Power Generation Motion to Intervene & Comments in FE

  1. Presentation Title

    Energy Savers [EERE]

    RPSEA Ultra-Deepwater Program FACA Meeting C. Michael Ming Christopher Haver Houston, TX January 30, 2007 Secure Energy for America Secure Energy for America Contents * RPSEA general comments * UDW program overview * UDW 2007 RFP status * 2007 FACA report comments Secure Energy for America RPSEA Members Florida International University University of South Carolina Massachusetts Institute of Technology Penn. State University Louisiana State University Univ. of Alaska Fairbanks Mississippi State

  2. Weldability of Fe[sub 3]Al-type Aluminide

    SciTech Connect (OSTI)

    David, S.A.; Zacharia, T. )

    1993-05-01

    An investigation was carried out to determine the weldability of a series of Fe[sub 3]Al-type alloys. Autogenous welds were made on thin sheets of iron aluminide alloys using gas tungsten arc (GTA) and electron beam (EB) welding processes at different travel speeds and power levels. The results indicate that although these alloys can be successfully welded using the EB welding process, some compositions may hot crack during GTA welding. Boron and zirconium additions have been found to promote hot cracking in these alloys. Among the alloys investigated, Fe[sub 3]Al modified with chromium, niobium and carbon (FA-129) showed the most promise for good weldability. Hot-cracking severity of this alloy was further investigated using the Sigmajig test. The minimum threshold stress of 25 ksi measured is within the material range of other aluminides and some commercial stainless steels. Also, some of these alloys exhibited a tendency for cold cracking. This is related to severe hydrogen embrittlement associated with this class of alloys.

  3. Thermodynamic Modeling and Experimental Study of the Fe-Cr-Zr System

    SciTech Connect (OSTI)

    Yang, Ying; Tan, Lizhen; Bei, Hongbin; Busby, Jeremy T

    2013-01-01

    Wide applications of zircaloys, stainless steels and their interactions in nuclear reactors require the knowledge on phase stability and thermodynamic property of the Fe-Cr-Zr system. This knowledge is also important to develop new Zr-contained Fe-Cr ferritic steels. This work aims at developing thermodynamic models for describing phase stability and thermodynamic property of the Fe-Cr-Zr system using the Calphad approach coupled with experimental study. Thermodynamic descriptions of the Fe-Cr and Cr-Zr systems were either directly adopted or slightly modified from literature. The Fe-Zr system has been remodeled to accommodate recent ab-initio calculation of formation enthalpies of various Fe-Zr compounds. Reliable ternary experimental data and thermodynamic models were mainly available in the Zr-rich region. Therefore, selected ternary alloys located in the vicinity of the eutectic valley of (Fe,Cr,Zr) and (Fe,Cr)2Zr laves phase in the Fe-rich region have been experimentally investigated in this study. Microstructure has been examined by using scanning electron microscope, energy-dispersive Xray spectroscopy and X-ray diffraction. These experimental results, along with the literature data were then used to develop thermodynamic models for phases in the Fe-Cr-Zr system. Calculated phase equilibria and thermodynamic properties of the ternary system yield satisfactory agreements with available experimental data, which gives the confidence to use these models as building blocks for developing a Zr, Fe and Cr contained multicomponent thermodynamic database for broader applications in nuclear reactors.

  4. NETL F 451.1/1-1, Categorical Exclusion Designation Form

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    12121-6301-03 RPSEA Sugar Land, TX Clearview Subsea, Houston, Texas FESCNGO Bill Fincham Subsea Produced Water Sensor Development Develop and design subsea water quality sensor...

  5. Effects of boron composition on tunneling magnetoresistance ratio and microstructure of CoFeB/MgO/CoFeB pseudo-spin-valve magnetic tunnel junctions

    SciTech Connect (OSTI)

    Kodzuka, M.; Ohkubo, T.; Hono, K.; Ikeda, S.; Ohno, H.; Gan, H. D.

    2012-02-15

    The effect of B concentration on the tunneling magnetoresistance (TMR) of (Co{sub 25}Fe{sub 75}){sub 100-x}B{sub x}/MgO/(Co{sub 25}Fe{sub 75}){sub 100-x}B{sub x} (x = 22 and 33) pseudo-spin-valve (P-SV) magnetic tunnel junctions (MTJs) was investigated. The TMR ratios for optimally annealed MTJs with x = 22 and 33 were 340% and 170%, respectively, at room temperature. High resolution transmission electron microscopy (HRTEM) observation showed a weaker (001) texture in the MgO barrier in the MTJ with x = 33. The bottom electrode was not fully crystallized even with a considerable amount of B in the (Co{sub 25}Fe{sub 75}){sub 67}B{sub 33}, while good epitaxy was observed between (001) textured MgO and (Co{sub 25}Fe{sub 75}){sub 78}B{sub 22} electrodes.

  6. Amorphization and crystallization processes of the ball-milled Al-Y-Fe-TM alloys (TM=Ni, Co, Cu, and Fe) (Prop. 2003-037)

    SciTech Connect (OSTI)

    Wilson, Timothy W.; Choo, Hahn; Porter, Wallace D; Speakman, Scott A; Fan, Chang; Liaw, Peter K

    2006-01-01

    High-energy ball milling was used to synthesize aluminum-based alloys containing amorphous and nanocrystalline phases to investigate the compositional effects of transition metals (TM) on the amorphization and crystallization processes of the ball-milled Al{sub 85}Y{sub 7}Fe{sub 5}TM{sub 3} alloys (TM = Ni, Co, Cu, and Fe) were investigated. The crystallization kinetics of the ball-milled Al-Y-Fe-TM nanocomposite powders were studied using differential scanning calorimetry (DSC). The DSC results of Al{sub 83}Y{sub 7}Fe{sub 5}Ni{sub 5} show that the crystallization temperature and the activation energy of crystallization are 668 K and 310 kJ/mol, respectively. In-situ high-temperature X-ray diffraction showed that the crystallization was a complex process involving growth of the nanocrystalline phase along with crystallization of the amorphous matrix phase.

  7. Identification of the dominant photochemical pathways and mechanistic insights to the ultrafast ligand exchange of Fe(CO)5 to Fe(CO)4EtOH

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kunnus, K.; Josefsson, I.; Rajkovic, I.; Schreck, S.; Quevedo, W.; Beye, M.; Weniger, C.; Grübel, S.; Scholz, M.; Nordlund, D.; et al

    2016-02-09

    We utilized femtosecond time-resolved resonant inelastic X-ray scattering and ab initio theory to study the transient electronic structure and the photoinduced molecular dynamics of a model metal carbonyl photocatalyst Fe(CO)5 in ethanol solution. We propose mechanistic explanation for the parallel ultrafast intra-molecular spin crossover and ligation of the Fe(CO)4 which are observed following a charge transfer photoexcitation of Fe(CO)5 as reported in our previous study [Wernet et al., Nature 520, 78 (2015)]. We find that branching of the reaction pathway likely happens in the 1A1 state of Fe(CO)4. A sub-picosecond time constant of the spin crossover from 1B2 tomore » 3B2 is rationalized by the proposed 1B2 → 1A1 → 3B2 mechanism. Ultrafast ligation of the 1B2 Fe(CO)4 state is significantly faster than the spin-forbidden and diffusion limited ligation process occurring from the 3B2 Fe(CO)4 ground state that has been observed in the previous studies. We propose that the ultrafast ligation occurs via 1B2 → 1A1 → 1A' Fe(CO)4EtOH pathway and the time scale of the 1A1 Fe(CO)4 state ligation is governed by the solute-solvent collision frequency. In conclusion, our study emphasizes the importance of understanding the interaction of molecular excited states with the surrounding environment to explain the relaxation pathways of photoexcited metal carbonyls in solution.« less

  8. Nuclear resonance vibrational spectroscopy reveals the FeS cluster composition and active site vibrational properties of an O2-tolerant NAD+-reducing [NiFe] hydrogenase

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lauterbach, Lars; Wang, Hongxin; Horch, Marius; Gee, Leland B.; Yoda, Yoshitaka; Tanaka, Yoshihito; Zebger, Ingo; Lenz, Oliver; Cramer, Stephen P.

    2014-10-30

    Hydrogenases are complex metalloenzymes that catalyze the reversible splitting of molecular hydrogen into protons and electrons essentially without overpotential. The NAD+-reducing soluble hydrogenase (SH) from Ralstonia eutropha is capable of H2 conversion even in the presence of usually toxic dioxygen. The molecular details of the underlying reactions are largely unknown, mainly because of limited knowledge of the structure and function of the various metal cofactors present in the enzyme. Here, all iron-containing cofactors of the SH were investigated by 57Fe specific nuclear resonance vibrational spectroscopy (NRVS). Our data provide experimental evidence for one [2Fe2S] center and four [4Fe4S] clusters, whichmore »is consistent with the amino acid sequence composition. Only the [2Fe2S] cluster and one of the four [4Fe4S] clusters were reduced upon incubation of the SH with NADH. This finding explains the discrepancy between the large number of FeS clusters and the small amount of FeS cluster-related signals as detected by electron paramagnetic resonance spectroscopic analysis of several NAD+-reducing hydrogenases. For the first time, Fe–CO and Fe–CN modes derived from the [NiFe] active site could be distinguished by NRVS through selective 13C labeling of the CO ligand. This strategy also revealed the molecular coordinates that dominate the individual Fe–CO modes. The present approach explores the complex vibrational signature of the Fe–S clusters and the hydrogenase active site, thereby showing that NRVS represents a powerful tool for the elucidation of complex biocatalysts containing multiple cofactors.« less

  9. Nuclear resonance vibrational spectroscopy reveals the FeS cluster composition and active site vibrational properties of an O2-tolerant NAD+-reducing [NiFe] hydrogenase

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lauterbach, Lars; Wang, Hongxin; Horch, Marius; Gee, Leland B.; Yoda, Yoshitaka; Tanaka, Yoshihito; Zebger, Ingo; Lenz, Oliver; Cramer, Stephen P.

    2014-10-30

    Hydrogenases are complex metalloenzymes that catalyze the reversible splitting of molecular hydrogen into protons and electrons essentially without overpotential. The NAD+-reducing soluble hydrogenase (SH) from Ralstonia eutropha is capable of H2 conversion even in the presence of usually toxic dioxygen. The molecular details of the underlying reactions are largely unknown, mainly because of limited knowledge of the structure and function of the various metal cofactors present in the enzyme. Here, all iron-containing cofactors of the SH were investigated by 57Fe specific nuclear resonance vibrational spectroscopy (NRVS). Our data provide experimental evidence for one [2Fe2S] center and four [4Fe4S] clusters, whichmore » is consistent with the amino acid sequence composition. Only the [2Fe2S] cluster and one of the four [4Fe4S] clusters were reduced upon incubation of the SH with NADH. This finding explains the discrepancy between the large number of FeS clusters and the small amount of FeS cluster-related signals as detected by electron paramagnetic resonance spectroscopic analysis of several NAD+-reducing hydrogenases. For the first time, Fe–CO and Fe–CN modes derived from the [NiFe] active site could be distinguished by NRVS through selective 13C labeling of the CO ligand. This strategy also revealed the molecular coordinates that dominate the individual Fe–CO modes. The present approach explores the complex vibrational signature of the Fe–S clusters and the hydrogenase active site, thereby showing that NRVS represents a powerful tool for the elucidation of complex biocatalysts containing multiple cofactors.« less

  10. The effect of Fe-Rh alloying on CO hydrogenation to C2+ oxygenates

    SciTech Connect (OSTI)

    Palomino, Robert; Magee, Joseph W.; Llorca, Jordi; Senanayake, Sanjaya D.; White, Michael G.

    2015-05-20

    A combination of reactivity and structural studies using X-ray diffraction (XRD), pair distribution function (PDF), and transmission electron microscopy (TEM) was used to identify the active phases of Fe-modified Rh/TiO2 catalysts for the synthesis of ethanol and other C2+ oxygenates from CO hydrogenation. XRD and TEM confirm the existence of FeRh alloys for catalyst with 17 wt% Fe and ~2 wt% Rh. Rietveld refinements show that FeRh alloy content increases with Fe loading up to ~4 wt%, beyond which segregation to metallic Fe becomes favored over alloy formation. Catalysts that contain Fe metal after reduction exhibit some carburization as evidenced by the formation of small amounts of Fe3C during CO hydrogenation. Analysis of the total Fe content of the catalysts also suggests the presence of FeOx also increased under reaction conditions. Reactivity studies show that enhancement of ethanol selectivity with Fe loading is accompanied by a significant drop in CO conversion. Comparison of the XRD phase analyses with selectivity suggests that higher ethanol selectivity is correlated with the presence of FeRh alloy phases. As a result, the interface between Fe and Rh serves to enhance the selectivity of ethanol, but suppresses the activity of the catalyst which is attributed to the blocking or modifying of Rh active sites.

  11. Solar Fuels from Rust: Atomic Layer Control of α-Fe2O3 | ANSER Center |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Argonne-Northwestern National Laboratory Solar Fuels from Rust: Atomic Layer Control of α-Fe2O3 Home > Research > ANSER Research Highlights > Solar Fuels from Rust: Atomic Layer Control of α-Fe2O3

  12. Mixed-Valent Fe Films ('Schwimmeisen') on the Surface of Reduced Ephemeral Pools

    SciTech Connect (OSTI)

    Grathoff, Georg H.; Baham, John E.; Easterly, Heather R.; Gassman, Paul L.; Hugo, Rick C.

    2007-12-01

    Floating, mixed-valent Fe films have been observed worldwide in wetlands, ferrous iron rich seeps, and in seasonally reduced soils, but are usually misidentified as oil or biofilms. Little characterization or explanation to their formation has taken place. Along the Oregon coast such films were found on ephemeral pools where Fe(II) rich groundwater (~ 100 ?M Fe) discharged at the base of Pleistocene sand dunes. Fe(II) oxidized to Fe(III) at the air-water interface to form ~ 100 to 300nm thick films. Analyses indicated that the films contained both Fe(III) and Fe(II) in a ratio of 3:1. Si was the other main cation, OH was the main anion and some C was identified as well. The film morphology was flat, under optical and electron microscopy with some attached floccules having a stringlike morphology. Energy filtered electron diffraction patterns (EFED) showed three diffraction rings at 4.5, 2.6, and 1.4 in some places and 2 rings (2.6 and 1.4 ) in others. Upon further oxidation the films became 2-line ferrihydrite. We are proposing the name Schwimmeisen for the floating, mixed-valent Fe film.

  13. Carbon-Supported bimetallic Pd-Fe catalysts for vapor-phase hydrodeoxygenation of guaiacol

    SciTech Connect (OSTI)

    Sun, Junming; Karim, Ayman M.; Zhang, He; Kovarik, Libor; Li, Xiaohong S.; Hensley, Alyssa; McEwen, Jean-Sabin; Wang, Yong

    2013-10-01

    Abstract Carbon supported metal catalysts (Cu/C, Fe/C, Pd/C, Pt/C, PdFe/C and Ru/C) have been prepared, characterized and tested for vapor-phase hydrodeoxygenation (HDO) of guaiacol (GUA) at atmospheric pressure. Phenol was the major intermediate on all catalysts. Over the noble metal catalysts saturation of the aromatic ring was the major pathway observed at low temperature (250 C), forming predominantly cyclohexanone and cyclohexanol. Substantial ring opening reaction was observed on Pt/C and Ru/C at higher reaction temperatures (e.g., 350 C). Base metal catalysts, especially Fe/C, were found to exhibit high HDO activity without ring-saturation or ring-opening with the main products being benzene, phenol along with small amounts of cresol, toluene and trimethylbenzene (TMB). A substantial enhancement in HDO activity was observed on the PdFe/C catalysts. Compared with Fe/C, the yield to oxygen-free aromatic products (i.e., benzene/toluene/TMB) on PdFe/C increased by a factor of four at 350 C, and by approximately a factor of two (83.2% versus 43.3%) at 450 C. The enhanced activity of PdFe/C is attributed to the formation of PdFe alloy as evidenced by STEM, EDS and TPR.

  14. Probe Mssbauer spectroscopy of mechanical alloying in binary Cr?{sup 57}Fe(1 at%) system

    SciTech Connect (OSTI)

    Elsukov, Evgeny P. Kolodkin, Denis A. Ul'yanov, Alexander L. Porsev, Vitaly E.

    2014-10-27

    Solid state reactions during mechanical alloying (MA) in a binary mixture of powdered Cr and {sup 57}Fe in atomic ratio of 99:1 have been studied using {sup 57}Fe Mssbauer spectroscopy, X-ray diffraction and Auger spectrometry. The proposed model of MA includes formation of Cr(Fe){sub x}O{sub y} oxides at the contact places of Cr and Fe particles, formation of nanostructure with simultaneous dissolution of the oxides, penetration of Fe atoms along grain boundaries in close-to-boundary distorted zones of interfaces in a substitutional position, formation of the substitutional solid solution of Fe in Cr in the body of grains. It was shown that the increase in the BCC lattice parameter on increasing the milling time is due to the dissolution of oxides and formation of interstitial solid solution of O in Cr. There were established substantial differences in consumption of BCC Fe in a Mg ? Al ? Si ? Cr sequence due to the major role of chemical interaction of Mg(Al,Si,Cr) with Fe.

  15. Multifunctional hybrid Fe2O3-Au nanoparticles for efficient plasmonic heating

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Murph, Simona E. Hunyadi; Larsen, George K.; Lascola, Robert J.

    2016-02-20

    We describe the synthesis and properties of multifunctional Fe2O3-Au nanoparticles produced by a wet chemical approach and investigate their photothermal properties using laser irradiation. Here, the composite Fe2O3-Au nanoparticles retain the properties of both materials, creating a multifunctional structure with excellent magnetic and plasmonic properties.

  16. Photochemical Properties, Composition, and Structure in Molecular Beam Epitaxy Grown Fe Doped and (Fe,N) Codoped Rutile TiO2(110)

    SciTech Connect (OSTI)

    Mangham, Andrew N.; Govind, Niranjan; Bowden, Mark E.; Shutthanandan, V.; Joly, Alan G.; Henderson, Michael A.; Chambers, Scott A.

    2011-08-11

    We have investigated the surface photochemical properties of Fe "doped" and (Fe,N) co-doped homoepitaxial rutile TiO2 (110) films grown by plasma assisted molecular beam epitaxy. Fe does not incorporate as an electronic dopant in the rutile lattice, but rather segregates to the film surface. However, co-deposition of Fe with N enhances the solubility of Fe, and DFT calculations suggest that co-dopant complex formation is the driving force behind the enhanced solubility. The co-doped films, in which a few atomic percent of Ti (O) are replaced with Fe (N), exhibit significant disorder compared to undoped films grown under the same conditions, presumably due to dopant-induced strain. Co-doping redshifts the rutile bandgap into the visible. However, the film surfaces are photochemically inert with respect to hole-mediated decomposition of adsorbed trimethyl acetate. The absence of photochemical activity may result from dopant-induced trap and/or recombination sites within the film. This study indicates that enhanced visible light absorptivity in TiO2 does not necessarily result in visible light initiated surface photochemistry.

  17. Tuning exchange bias in Fe/γ-Fe{sub 2}O{sub 3} core-shell nanoparticles: Impacts of interface and surface spins

    SciTech Connect (OSTI)

    Khurshid, Hafsa E-mail: phanm@usf.edu Phan, Manh-Huong E-mail: phanm@usf.edu Mukherjee, Pritish; Srikanth, Hariharan E-mail: phanm@usf.edu

    2014-02-17

    A comparative study has been performed of the exchange bias (EB) effect in Fe/γ-Fe{sub 2}O{sub 3} core-shell nanoparticles with the same thickness of the γ-Fe{sub 2}O{sub 3} shell (∼2 nm) and the diameter of the Fe core varying from 4 nm to 11 nm. Transmission electron microscopy (TEM) and high-resolution TEM confirmed the high quality of the core-shell nanostructures. A systematic analysis of magnetization versus magnetic field measurements under zero-field-cooled and field-cooled regimes using the Meiklejohn-Bean model and deconvoluting superparamagnetic and paramagnetic contribution to the total magnetic moment Langevin function shows that there exists a critical particle size (∼10 nm), above which the spins at the interface between Fe and γ-Fe{sub 2}O{sub 3} contribute primarily to the EB, but below which the surface spin effect is dominant. Our finding yields deeper insight into the collective contributions of interface and surface spins to the EB in core-shell nanoparticle systems, knowledge of which is the key to manipulating EB in magnetic nanostructures for spintronics applications.

  18. Stable half-metallic monolayers of FeCl{sub 2}

    SciTech Connect (OSTI)

    Torun, E. Sahin, H.; Singh, S. K.; Peeters, F. M.

    2015-05-11

    The structural, electronic, and magnetic properties of single layers of Iron Dichloride (FeCl{sub 2}) were calculated using first principles calculations. We found that the 1T phase of the single layer FeCl{sub 2} is 0.17?eV/unit cell more favorable than its 1H phase. The structural stability is confirmed by phonon calculations. We found that 1T-FeCl{sub 2} possess three Raman-active (130, 179, and 237?cm{sup ?1}) and one infrared-active (279?cm{sup ?1}) phonon branches. The electronic band dispersion of the 1T-FeCl{sub 2} is calculated using both gradient approximation of Perdew-Burke-Ernzerhof and DFT-HSE06 functionals. Both functionals reveal that the 1T-FeCl{sub 2} has a half-metallic ground state with a Curie temperature of 17?K.

  19. Low-dimensional hyperthin FeS2 nanostructures for efficient and stable hydrogen evolution electrocatalysis

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Jasion, Daniel; Qiao, Qiao; Barforoush, Joseph M.; Zhu, Yimei; Ren, Shenqiang; Leonard, Kevin C.

    2015-10-05

    We report a scalable, solution-processing method for synthesizing low-dimensional hyperthin FeS2 nanostructures, and we show that 2D FeS2 disc nanostructures are an efficient and stable hydrogen evolution electrocatalyst. By changing the Fe:S ratio in the precursor solution, we were able to preferentially synthesize either 1D wire or 2D disc nanostructures. The 2D FeS2 disc structure has the highest electrocatalytic activity for the hydrogen evolution reaction, comparable to platinum in neutral pH conditions. Moreover, the ability of the FeS2 nanostructures to generate hydrogen was confirmed by scanning electrochemical microscopy, and the 2D disc nanostructures were able to generate hydrogen for overmore » 125 h.« less

  20. Phonon properties of BaFe?X? (X=S, Se) spin ladder compounds

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Popovicq, Z. V.; Petrovic, C.; Scepanovic, M.; Lazarevic, N.; Opacic, M.; Radonjic, M. M.; Tanaskovic, D.; Lei, Hechang

    2015-02-27

    We present the Raman scattering spectra of the S=2 spin ladder compounds BaFe?X? (X=S,Se) in a temperature range between 20 and 400 K. Although the crystal structures of these two compounds are both orthorhombic and very similar, they are not isostructural. The unit cell of BaFe?S? (BaFe?Se?) is base-centered Cmcm (primitive Pnma), giving 18 (36) modes to be observed in the Raman scattering experiment. We have detected almost all Raman active modes, predicted by factor group analysis, which can be observed from the cleavage planes of these compounds. Assignment of the observed Raman modes of BaFe?S(Se)? is supported by themorelattice dynamics calculations. The antiferromagnetic long-range spin ordering in BaFe?Se? below TN=255K leaves a fingerprint both in the A1g and B3g phonon mode linewidth and energy.less

  1. The FE-I4 Pixel Readout Chip and the IBL Module

    SciTech Connect (OSTI)

    Barbero, Marlon; Arutinov, David; Backhaus, Malte; Fang, Xiao-Chao; Gonella, Laura; Hemperek, Tomasz; Karagounis, Michael; Hans, Kruger; Kruth, Andre; Wermes, Norbert; Breugnon, Patrick; Fougeron, Denis; Gensolen, Fabrice; Menouni, Mohsine; Rozanov, Alexander; Beccherle, Roberto; Darbo, Giovanni; Caminada, Lea; Dube, Sourabh; Fleury, Julien; Gnani, Dario; /LBL, Berkeley /NIKHEF, Amsterdam /Gottingen U. /SLAC

    2012-05-01

    FE-I4 is the new ATLAS pixel readout chip for the upgraded ATLAS pixel detector. Designed in a CMOS 130 nm feature size process, the IC is able to withstand higher radiation levels compared to the present generation of ATLAS pixel Front-End FE-I3, and can also cope with higher hit rate. It is thus suitable for intermediate radii pixel detector layers in the High Luminosity LHC environment, but also for the inserted layer at 3.3 cm known as the 'Insertable B-Layer' project (IBL), at a shorter timescale. In this paper, an introduction to the FE-I4 will be given, focusing on test results from the first full size FE-I4A prototype which has been available since fall 2010. The IBL project will be introduced, with particular emphasis on the FE-I4-based module concept.

  2. Effect of Fe doping concentration on photocatalytic activity of ZnO nanosheets under natural sunlight

    SciTech Connect (OSTI)

    Khokhra, Richa; Kumar, Rajesh

    2015-05-15

    A facile room temperature, aqueous solution-based chemical method has been adopted for large-scale synthesis of Fe doped ZnO nanosheets. The XRD and SEM results reveal the as-synthesized products well crystalline and accumulated by large amount of interweave nanosheets, respectively. Energy dispersive spectroscopy data confirmed Fe doping of the ZnO nanosheets with a varying Fe concentration. The photoluminescence spectrum reveals a continuous suppression of defect related emissions intensity by increasing the concentration of the Fe ion. A photocatalytic activity using these samples under sunlight irradiation in the mineralization of methylene blue dye was investigated. The photocatalytic activity of Fe doped ZnO nanosheets depends upon the presence of surface oxygen vacancies.

  3. Thermal plasma synthesis of Fe{sub 1?x}Ni{sub x} alloy nanoparticles

    SciTech Connect (OSTI)

    Raut, Suyog A.; Kanhe, Nilesh S.; Bhoraskar, S. V.; Mathe, V. L.; Das, A. K.

    2014-04-24

    Fe-Ni alloy nanoparticles are of great interest because of diverse practical applications in the fields such as magnetic fluids, high density recording media, catalysis and medicine. We report the synthesis of Fe-Ni nanoparticles via thermal plasma route. Thermal plasma assisted synthesis is a high temperature process and gives high yields of production. Here, we have used direct arc thermal plasma plume of 6kw as a source of energy at operating pressure 500 Torr. The mixture of Fe-Ni powder in required proportion (Fe{sub 1?x}Ni{sub x}; x=0.30, 0.32, 0.34, 0.36, 0.38 and 0.40) was made to evaporate simultaneously from the graphite anode in thermal plasma reactor to form Fe-Ni bimetallic nanoparticles. The as synthesized particles were characterized by X-Ray Diffraction (XRD), Thermo-Gravimetric Analysis/Differential Scanning Calorimtry (TGA/DSC)

  4. Intrinsic magnetic properties of hexagonal LuFeO{sub 3} and the effects of nonstoichiometry

    SciTech Connect (OSTI)

    Moyer, Jarrett A. E-mail: schlom@cornell.edu; Schiffer, Peter; Misra, Rajiv; Mundy, Julia A.; Brooks, Charles M.; Heron, John T.; Muller, David A.; Schlom, Darrell G. E-mail: schlom@cornell.edu

    2014-01-01

    We used oxide molecular-beam epitaxy in a composition-spread geometry to deposit hexagonal LuFeO{sub 3} (h-LuFeO{sub 3}) thin films with a monotonic variation in the Lu/Fe cation ratio, creating a mosaic of samples that ranged from iron rich to lutetium rich. We characterized the effects of composition variation with x-ray diffraction, atomic force microscopy, scanning transmission electron microscopy, and superconducting quantum interference device magnetometry. After identifying growth conditions leading to stoichiometric film growth, an additional sample was grown with a rotating sample stage. From this stoichiometric sample, we determined stoichiometric h-LuFeO{sub 3} to have a T{sub N} = 147 K and M{sub s} = 0.018 ?{sub B}/Fe.

  5. First principles study of Fe in diamond: A diamond-based half metallic dilute magnetic semiconductor

    SciTech Connect (OSTI)

    Benecha, E. M.; Lombardi, E. B.

    2013-12-14

    Half-metallic ferromagnetic ordering in semiconductors, essential in the emerging field of spintronics for injection and transport of highly spin polarised currents, has up to now been considered mainly in III–V and II–VI materials. However, low Curie temperatures have limited implementation in room temperature device applications. We report ab initio Density Functional Theory calculations on the properties of Fe in diamond, considering the effects of lattice site, charge state, and Fermi level position. We show that the lattice sites and induced magnetic moments of Fe in diamond depend strongly on the Fermi level position and type of diamond co-doping, with Fe being energetically most favorable at the substitutional site in p-type and intrinsic diamond, while it is most stable at a divacancy site in n-type diamond. Fe induces spin polarized bands in the band gap, with strong hybridization between Fe-3d and C-2s,2p bands. We further consider Fe-Fe spin interactions in diamond and show that substitutional Fe{sup +1} in p-type diamond exhibits a half-metallic character, with a magnetic moment of 1.0 μ{sub B} per Fe atom and a large ferromagnetic stabilization energy of 33 meV, an order of magnitude larger than in other semiconductors, with correspondingly high Curie temperatures. These results, combined with diamond's unique properties, demonstrate that Fe doped p-type diamond is likely to be a highly suitable candidate material for spintronics applications.

  6. Effects of phase transformation on the microstructures and magnetostriction of Fe-Ga and Fe-Ga-Zn ferromagnetic shape memory alloys

    SciTech Connect (OSTI)

    Lin, Yin-Chih Lin, Chien-Feng

    2015-05-07

    The phase transformation and magnetostriction of bulk Fe{sub 73}Ga{sub 27} and Fe{sub 73}Ga{sub 18}Zn{sub 9} (at.?%) ferromagnetic shape memory alloys (FSMs) were investigated by transmission electron microscopy (TEM), x-ray diffraction (XRD), and a magnetostrictive-meter setup. For the Fe{sub 73}Ga{sub 27} FSM alloy solution treated at 1100?C for 4?h and quenched in ice brine, the antiphase boundary segments of the D0{sub 3} domain were observed in the A2 (disordered) matrix, and the Fe{sub 73}Ga{sub 27} FSM alloy had an optimal magnetostriction (?{sub ?}{sup s?}=?71??10{sup ?6} and ?{sub ?}{sup s?}=??31??10{sup ?6}). In Fe{sub 73}Ga{sub 27} FSM alloy as-quenched, aged at 700?C for 24?h, and furnace cooled, D0{sub 3} nanoclusters underwent phase transformation to an intermediate tetragonal phase (i.e., L1{sub 0}-like martensite) via Bain distortion, and finally L1{sub 2} (Fe{sub 3}Ga) structures precipitated, as observed by TEM and XRD. The L1{sub 0}-like martensite and L1{sub 2} phases in the aged Fe{sub 73}Ga{sub 27} FSM alloy drastically decreased the magnetostriction from positive to negative (?{sub ?}{sup s?}=??20??10{sup ?6} and ?{sub ?}{sup s?}=??8??10{sup ?6}). However, in Fe{sub 73}Ga{sub 18}Zn{sub 9} FSM alloy as-quenched and aged, the phase transformation of D0{sub 3} to an intermediate tetragonal martensite phase and precipitation of L1{sub 2} structures were not found. The results indicate that the aged Fe{sub 73}Ga{sub 18}Zn{sub 9} FSM alloy maintained stable magnetostriction (?{sub ?}{sup s?}=?36??10{sup ?6} and ?{sub ?}{sup s?}=??31??10{sup ?6}). Adding Zn can improve the ferromagnetic shape memory effect of aged Fe{sub 73}Ga{sub 18}Zn{sub 9} alloy, which may be useful in application of the alloy in high temperature environments.

  7. Towards tailoring the magnetocaloric response in FeRh-based ternary compounds

    SciTech Connect (OSTI)

    Barua, Radhika Jiménez-Villacorta, Félix; Lewis, L. H.

    2014-05-07

    In this work, we demonstrate that the magnetocaloric response of FeRh-based compounds may be tailored for potential magnetic refrigeration applications by chemical modification of the FeRh lattice. Alloys of composition Fe(Rh{sub 1−x}A{sub x}) or (Fe{sub 1−x}B{sub x})Rh (A = Cu, Pd; B = Ni; 0 < x < 0.06) were synthesized via arc-melting and subsequent annealing in vacuum at 1000 °C for 48 h. The magnetocaloric properties of the FeRh-based systems were determined using isothermal M(H) curves measured in the vicinity of the magnetostructural temperature (T{sub t}). It is found that the FeRh working temperature range (δT{sub FWHM}) may be chemically tuned over a wide temperature range, 100 K ≤ T ≤ 400 K. While elemental substitution consistently decreases the magnetic entropy change (ΔS{sub mag}) of the FeRh-based ternary alloys from that of the parent FeRh compound (ΔS{sub mag},{sub FeRh} ∼ 17 J/kg K; ΔS{sub mag,FeRh-ternary =} 7–14 J/kg K at H{sub app} = 2 T), the net refrigeration capacity (RC), defined as the amount of heat that can be transferred during one magnetic refrigeration cycle, of the modified systems is significantly higher (RC{sub FeRh} ∼ 150 J/kg; RC{sub FeRh-ternary =} 170–210 J/kg at H{sub app} = 2 T). These results are attributed to stoichiometry-induced changes in the FeRh electronic band structure and beneficial broadening of the magnetostructural transition due to local chemical disorder.

  8. Characterization of Photochemical Processes for H2 Production by CdS Nanorod-[FeFe] Hydrogenase Complexes

    SciTech Connect (OSTI)

    Brown, K. A.; Wilker, M. B.; Boehm, M.; Dukovic, G.; King, P. W.

    2012-03-28

    We have developed complexes of CdS nanorods capped with 3-mercaptopropionic acid (MPA) and Clostridium acetobutylicum [FeFe]-hydrogenase I (CaI) that photocatalyze reduction of H{sup +} to H{sub 2} at a CaI turnover frequency of 380-900 s{sup -1} and photon conversion efficiencies of up to 20% under illumination at 405 nm. In this paper, we focus on the compositional and mechanistic aspects of CdS:CaI complexes that control the photochemical conversion of solar energy into H{sub 2}. Self-assembly of CdS with CaI was driven by electrostatics, demonstrated as the inhibition of ferredoxin-mediated H{sub 2} evolution by CaI. Production of H{sub 2} by CdS:CaI was observed only under illumination and only in the presence of a sacrificial donor. We explored the effects of the CdS:CaI molar ratio, sacrificial donor concentration, and light intensity on photocatalytic H{sub 2} production, which were interpreted on the basis of contributions to electron transfer, hole transfer, or rate of photon absorption, respectively. Each parameter was found to have pronounced effects on the CdS:CaI photocatalytic activity. Specifically, we found that under 405 nm light at an intensity equivalent to total AM 1.5 solar flux, H{sub 2} production was limited by the rate of photon absorption ({approx}1 ms{sup -1}) and not by the turnover of CaI. Complexes were capable of H{sub 2} production for up to 4 h with a total turnover number of 106 before photocatalytic activity was lost. This loss correlated with inactivation of CaI, resulting from the photo-oxidation of the CdS capping ligand MPA.

  9. Mechanically-induced disorder in CaFe2As2: A 57Fe Mssbauer study

    SciTech Connect (OSTI)

    Ma, Xiaoming; Ran, Sheng; Canfield, Paul C.; Bud'ko, Sergey L.

    2015-10-17

    57Fe Mssbauer spectroscopy was used to perform a microscopic study on the extremely pressure and strain sensitive compound, CaFe2As2, with different degrees of strain introduced by grinding and annealing. At the base temperature, in the antiferromagnetic/orthorhombic phase, compared to a sharp sextet Mssbauer spectrum of single crystal CaFe2As2, which is taken as an un-strained sample, an obviously broadened sextet and an extra doublet were observed for ground CaFe2As2 powders with different degrees of strain. The Mssbauer results suggest that the magnetic phase transition of CaFe2As2 can be inhomogeneously suppressed by the grinding induced strain to such an extent that the antiferromagnetic order in parts of the grains forming the powdered sample remain absent all the way down to 4.6 K. However, strain has almost no effect on the temperature dependent hyperfine magnetic field in the grains with magnetic order. Additional electronic and asymmetry information was obtained from the isomer shift and quadrupole splitting. Similar isomer shift values in the magnetic phase for samples with different degrees of strain, indicate that the stain does not bring any significant variation of the electronic density at 57Fe nucleus position. As a result, the absolute values of quadrupole shift in the magnetic phase decrease and approach zero with increasing degrees of strain, indicating that the strain reduces the average lattice asymmetry at Fe atom position.

  10. The importance of Fe surface states for spintronic devices based on magnetic tunnel junctions

    SciTech Connect (OSTI)

    Chantis, Athanasios N

    2008-01-01

    In this article we give a review of our recent theoretical studies of the influence of Fe(001) surface (interface) states on spin-polarized electron transport across magnetic tunnel junctions with Fe electrodes. We show that minority-spin surface (interface) states are responsible for at least two effects which are important for spin electronics. First, they can produce a sizable tunneling anisotropic magnetoresistance in magnetic tunnel junctions with a single Fe electrode. The effect is driven by a Rashba shift of the resonant surface band when the magnetization changes direction. This can introduce a new class of spintronic devices, namely, tunneling magnetoresistance junctions with a single ferromagnetic electrode. Second, in Fe/GaAs(001) magnetic tunnel junctions minority-spin interface states produce a strong dependence of the tunneling current spin polarization on applied electrical bias. A dramatic sign reversal within a voltage range of just a few tenths of an eV is predicted. This explains the observed sign reversal of spin polarization in recent experiments of electrical spin injection in Fe/GaAs(001) and related reversal of tunneling magnetoresistance through vertical Fe/GaAs/Fe trilayers.

  11. Magnetic ordering in tetragonal FeS: Evidence for strong itinerant spin fluctuations

    SciTech Connect (OSTI)

    Kwon, K.D.; Refson, K.; Bone, S.; Qiao, R.; Yang, W.; Liu, Z.; Sposito, G.

    2010-11-01

    Mackinawite is a naturally occurring layer-type FeS mineral important in biogeochemical cycles and, more recently, in the development of microbial fuel cells. Conflicting results have been published as to the magnetic properties of this mineral, with Moessbauer spectroscopy indicating no magnetic ordering down to 4.2 K but density functional theory (DFT) predicting an antiferromagnetic ground state, similar to the Fe-based high-temperature superconductors with which it is isostructural and for which it is known that magnetism is suppressed by strong itinerant spin fluctuations. We investigated this latter possibility for mackinawite using photoemission spectroscopy, near-edge x-ray absorption fine structure spectroscopy, and DFT computations. Our Fe 3{sub s} core-level photoemission spectrum of mackinawite showed a clear exchange-energy splitting (2.9 eV) consistent with a 1 {micro}{sub B} magnetic moment on the Fe ions, while the Fe L-edge x-ray absorption spectrum indicated rather delocalized Fe 3{sub d} electrons in mackinawite similar to those in Fe metal. Our DFT computations demonstrated that the ground state of mackinawite is single-stripe antiferromagnetic, with an Fe magnetic moment (2.7 {micro}{sub B}) that is significantly larger than the experimental estimate and has a strong dependence on the S height and lattice parameters. All of these trends signal the existence of strong itinerant spin fluctuations. If spin fluctuations prove to be mediators of electron pairing, we conjecture that mackinawite may be one of the simplest Fe-based superconductors.

  12. Fe3-xTixO4 Nanoparticles as Tunable Probes of Microbial Metal Oxidation

    SciTech Connect (OSTI)

    Liu, Juan; Pearce, Carolyn I.; Liu, Chongxuan; Wang, Zheming; Shi, Liang; Arenholz, Elke; Rosso, Kevin M.

    2013-05-14

    Present and emerging biotechnological applications for iron (oxyhydr)oxide nanomaterials depend on their interaction with microorganisms, as do their toxicity, transport, and fate in biological and environmental systems. However, mass or electron transfer along key molecular pathways at microbe-nanomaterial interfaces is extremely difficult to quantify because of system complexity. Inspired by Fe(II)-oxidizing microbes widespread in nature, we isolate and characterize one such pathway by examining the oxidation of Fe3-xTixO4 (magnetite-titanomagnetite) nanoparticles by the bacterial electron transfer enzyme MtoA, a decaheme c-type cytochrome. Oxidation by MtoA was studied as a function of the thermodynamic driving force for electron transfer by controlling the Ti(IV) doping content (x), which tunes the solid-state Fe(II)/Fe(III) ratio built into the nanoparticles. A higher Fe(II)/Fe(III) ratio appears to proportionally increase the electron transfer kinetics to the cytochrome. In situ x-ray diffraction indicated that during oxidation the spinel ferrite lattice remains intact while structural Fe(II) is progressively depleted. Surface and atomic site specific Fe L2,3-edge x-ray magnetic circular dichroism indicated that MtoA directly accesses magnetically-ordered B-sublattice Fe(II) at the interface. This study provides first quantitative insights into an isolated molecular pathway for biotransformation of iron (oxyhydr)oxide nanomaterials. And, more generally, it also illustrates new techniques for probing these pathways in detail, featuring use of tailored nanoparticles, purified metalloenzyme, and synchrotron x-ray absorption spectroscopies.

  13. NdBaFe{sub 2}O{sub 5+w} and steric effect of Nd on valence mixing and ordering of Fe

    SciTech Connect (OSTI)

    Linden, J.; Karen, P.

    2010-11-15

    NdBaFe{sub 2}O{sub 5} above and below Verwey transition is studied by synchrotron X-ray powder diffraction and Moessbauer spectroscopy and compared with GdBaFe{sub 2}O{sub 5} that adopts a higher-symmetry charge-ordered structure typical of the Sm-Ho variants of the title phase. Differences are investigated by Moessbauer spectroscopy accounting for iron valence states at their local magnetic and ionic environments. In the charge-ordered state, the orientation of the electric-field gradient (EFG) versus the internal magnetic field (B) agrees with experiment only when contribution from charges of the ordered d{sub xz} orbitals of Fe{sup 2+} is included, proving thus the orbital ordering. The EFG magnitude indicates that only some 60% of the orbital order occurring in the Sm-Ho variants is achieved in NdBaFe{sub 2}O{sub 5}. The consequent diminishing of the orbit contribution (of opposite sign) to the field B at the Fe{sup 2+} nucleus explains why B is larger than for the Sm-Ho variants. The decreased orbital ordering in NdBaFe{sub 2}O{sub 5} causes a corresponding decrease in charge ordering, which is achieved by decreasing both the amount of the charge-ordered iron states in the sample and their fractional valence separation as seen by the Moessbauer isomer shift. The charge ordering in NdBaFe{sub 2}O{sub 5+w} is more easily suppressed by the oxygen nonstoichiometry (w) than in the Sm-Ho variants. Also the valence mixing into Fe{sup 2.5+} is destabilized by the large size of Nd. The orientation of the EFG around this valence-mixed iron can only be accounted for when the valence-mixing electron is included in the electrostatic ligand field. This proves that the valence mixing occurs between the two iron atoms facing each other across the structural plane of the rare-earth atoms. -- Graphical Abstract: Moessbauer spectrum detects ordering of d{sub xz} orbitals of Fe{sup II}O{sub 5} via the electric-field gradient (EFG) of the orbital, which makes the main component of the total EFG parallel with the magnetic moment B. Display Omitted

  14. In situ measurement of interfacial tension of Fe-S and Fe-P liquids under high pressure using X-ray radiography and tomography techniques

    SciTech Connect (OSTI)

    Terasakia, H; Urakawa, S; Funakoshi, K; Nishiyama, N; Wang, Y; Nishida, K; Sakamaki, T; Suzuki, A; Ohtani, E

    2009-09-14

    Interfacial tension is one of the most important properties of the liquid iron alloy that controls the core formation process in the early history of the Earth and planets. In this study, we made high-pressure X-ray radiography and micro-tomography measurements to determine the interfacial tension between liquid iron alloys and silicate melt using the sessile drop method. The measured interfacial tension of liquid Fe-S decreased significantly (802-112 mN/m) with increasing sulphur content (0-40 at%) at 1.5 GPa. In contrast, the phosphorus content of Fe had an almost negligible effect on the interfacial tension of liquid iron. These tendencies in the effects of light elements are consistent with those measured at ambient pressure. Our results suggest that the effect of sulphur content on the interfacial tension of liquid Fe-S (690 mN/m reduction with the addition of 40 at% S) is large compared with the effect of temperature (~273 mN/m reduction with an increase of 200 K). The three-dimensional structure of liquid Fe-S was obtained at ~2 GPa and 1373-1873 K with a high-pressure tomography technique. The Fe-S droplet was quite homogeneous when evaluated in a slice of the three-dimensional image.

  15. Mixing antiferromagnets to tune NiFe-[IrMn/FeMn] interfacial spin-glasses, grains thermal stability, and related exchange bias properties

    SciTech Connect (OSTI)

    Akmaldinov, K.; Ducruet, C.; Portemont, C.; Joumard, I.; Prejbeanu, I. L.; Dieny, B.; Baltz, V.

    2014-05-07

    Spintronics devices and in particular thermally assisted magnetic random access memories require a wide range of ferromagnetic/antiferromagnetic (F/AF) exchange bias (EB) properties and subsequently of AF materials to fulfil diverse functionality requirements for the reference and storage. For the reference layer, large EB energies and high blocking temperature (T{sub B}) are required. In contrast, for the storage layer, mostly moderate T{sub B} are needed. One of the present issues is to find a storage layer with properties intermediate between those of IrMn and FeMn and in particular: (i) with a T{sub B} larger than FeMn for better stability at rest-T but lower than IrMn to reduce power consumption at write-T and (ii) with improved magnetic interfacial quality, i.e., with reduced interfacial glassy character for lower properties dispersions. To address this issue, the EB properties of F/AF based stacks were studied for various mixed [IrMn/FeMn] AFs. In addition to EB loop shifts, the F/AF magnetic interfacial qualities and the AF grains thermal stability are probed via measurements of the low- and high-temperature contributions to the T{sub B} distributions, respectively. A tuning of the above three parameters is observed when evolving from IrMn to FeMn via [IrMn/FeMn] repetitions.

  16. Magnetic structures of FeTiO{sub 3}-Fe{sub 2}O{sub 3} solid solution thin films studied by soft X-ray magnetic circular dichroism and ab initio multiplet calculations

    SciTech Connect (OSTI)

    Hojo, H. E-mail: fujita@dipole7.kuic.kyoto-u.ac.jp; Fujita, K. E-mail: fujita@dipole7.kuic.kyoto-u.ac.jp; Matoba, T.; Tanaka, K.; Ikeno, H.; Mizoguchi, T.; Tanaka, I.; Nakamura, T.; Takeda, Y.; Okane, T.

    2014-03-17

    The solid solutions between ilmenite (FeTiO{sub 3}) and hematite (α-Fe{sub 2}O{sub 3}) have recently attracted considerable attention as a spintronic material due to their interesting magnetic and electrical properties. In this study, the electronic and magnetic structures of epitaxially grown 0.6FeTiO{sub 3}·0.4Fe{sub 2}O{sub 3} solid solution thin films were investigated by combining x-ray absorption near-edge structure (XANES), x-ray magnetic circular dichroism (XMCD) for two different crystallographic projections, and first-principles theoretical calculations. The Fe L-edge XANES and XMCD spectra reveal that Fe is in the mixed-valent Fe{sup 2+}–Fe{sup 3+} states while Fe{sup 2+} ions are mainly responsible for the magnetization. Moreover, the experimental Fe L-edge XANES and XMCD spectra change depending on the incident x-ray directions, and the theoretical spectra explain such spectral features. We also find a large orbital magnetic moment, which can originate the magnetic anisotropy of this system. On the other hand, although the valence state of Ti was interpreted to be 4+ from the Ti L-edge XANES, XMCD signals indicate that some electrons are present in the Ti-3d orbital, which are coupled antiparallel to the magnetic moment of Fe{sup 2+} ions.

  17. Size dependent structural, vibrational and magnetic properties of BiFeO{sub 3} and core-shell structured BiFeO{sub 3}@SiO{sub 2} nanoparticles

    SciTech Connect (OSTI)

    Chauhan, Sunil Kumar, Manoj Chhoker, Sandeep Katyal, S. C.

    2014-04-24

    Bulk BiFeO{sub 3}, BiFeO{sub 3} nanoparticles and core-shell structured BiFeO{sub 3}@SiO{sub 2} nanoparticles were synthesized by solid state reaction method, sol-gel and Stber process (SiO{sub 2} shell) respectively. Transmission electron microscopy image confirmed the core-shell structure of BiFeO{sub 3}@SiO{sub 2} nanoparticles with BiFeO3 core ?50-90 nm and SiO{sub 2} shell ?16 nm. X-ray diffraction and FTIR spectroscopy results showed the presence of distorted rhombohedral structure with R3c space group in all three samples. The magnetic measurement indicated the existence of room-temperature weak ferromagnetism in core-shell BiFeO{sub 3}@SiO{sub 2} nanoparticles and BiFeO3 nanoparticles, whereas bulk BiFeO{sub 3} showed antiferromagnteic nature. Electron Spin Resonance results confirmed the enhancement in magnetic properties of coreshell structured BiFeO{sub 3}@SiO{sub 2} nanoparticles in comparison with BiFeO{sub 3} nanoparticles and bulk BiFeO{sub 3}.

  18. Morphotropic Phase Boundaries in Ferromagnets: Tb1 xDyxFe2 Alloys (Journal

    Office of Scientific and Technical Information (OSTI)

    Article) | SciTech Connect Tb1 xDyxFe2 Alloys Citation Details In-Document Search Title: Morphotropic Phase Boundaries in Ferromagnets: Tb1 xDyxFe2 Alloys The structure and properties of the ferromagnet Tb1 xDyxFe2 are explored through the morphotropic phase boundary (MPB) separating ferroic phases of differing symmetry. Our synchrotron data support a first order structural transition, with a broadening MPB width at higher temperatures. The optimal point for magnetomechanical applications

  19. Magneto-optical characterizations of FeTe₀̣₅Se₀̣₅ thin films with

    Office of Scientific and Technical Information (OSTI)

    critical current density over 1 MA/cm² (Journal Article) | SciTech Connect Magneto-optical characterizations of FeTe₀̣₅Se₀̣₅ thin films with critical current density over 1 MA/cm² Citation Details In-Document Search Title: Magneto-optical characterizations of FeTe₀̣₅Se₀̣₅ thin films with critical current density over 1 MA/cm² We performed magneto-optical (MO) measurements on FeTe₀̣₅Se₀̣₅ thin films grown on LaAlO₃ (LAO) and Yttria-stabilized zirconia (YSZ)

  20. A Minimal Two-band Model for the Superconducting Fe-pnictides

    SciTech Connect (OSTI)

    Raghu, S.

    2010-03-25

    Following the discovery of the Fe-pnictide superconductors, LDA band structure calculations showed that the dominant contributions to the spectral weight near the Fermi energy came from the Fe 3d orbitals. The Fermi surface is characterized by two hole surfaces around the {Lambda} point and two electron surfaces around the M point of the 2 Fe/cell Brillouin zone. Here, we describe a 2-band model that reproduces the topology of the LDA Fermi surface and exhibits both ferromagnetic and q = ({pi}, 0) spin density wave (SDW) fluctuations. We argue that this minimal model contains the essential low energy physics of these materials.

  1. Phase transition and metallization of FeO at high pressures and

    Office of Scientific and Technical Information (OSTI)

    temperatures (Journal Article) | SciTech Connect Journal Article: Phase transition and metallization of FeO at high pressures and temperatures Citation Details In-Document Search Title: Phase transition and metallization of FeO at high pressures and temperatures Wuestite, Fe{sub 1-x}O, is an important component in the mineralogy of Earth's lower mantle and may also be a component of the core. Therefore its high pressure-temperature behavior, including its electronic structure, is essential

  2. Duo at Santa Fe's Monte del Sol Charter School takes top award in 25th

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New Mexico Supercomputing Challenge 5th New Mexico Supercomputing Challenge Duo at Santa Fe's Monte del Sol Charter School takes top award in 25th New Mexico Supercomputing Challenge Meghan Hill and Katelynn James took the top prize for their research project April 21, 2015 Katelynn James, left, and Meghan Hill of Monte del Sol Charter School in Santa Fe. Katelynn James, left, and Meghan Hill of Monte del Sol Charter School in Santa Fe. Contact Los Alamos National Laboratory Steve Sandoval

  3. QER Public Meeting in Santa Fe, NM: State, Local and Tribal Issues |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Santa Fe, NM: State, Local and Tribal Issues QER Public Meeting in Santa Fe, NM: State, Local and Tribal Issues Meeting Date and Location August 11, 2014 - 9:00 AM MDT New Mexico State personnel Office Auditorium 2600 Cerrillos Road Santa Fe, NM 87505-3258 Meeting Information Federal Register Notice Agenda: State, Local and Tribal Issues See the link below to download a copy of the meeting transcript1 See the link below to download a copy of the meeting summary See the

  4. SEMI ANNUAL REPORTS - CAMERON LNG, LLC - FE DKT. NO. 14-204-LNG - ORDER NO.

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    3620 | Department of Energy SEMI ANNUAL REPORTS - CAMERON LNG, LLC - FE DKT. NO. 14-204-LNG - ORDER NO. 3620 SEMI ANNUAL REPORTS - CAMERON LNG, LLC - FE DKT. NO. 14-204-LNG - ORDER NO. 3620 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR Cameron LNG, LLC - FE Dkt. No. 15-36-LNG - ORDER 3680 SEMI-ANNUAL REPORTS FOR CAMERON LNG LLC - DKT. NO. 11-162-LNG - ORDER 3391-A Semi-annual Reports for Cameron LNG LLC - Dk. No. 11-145-LNG - Order 3059

  5. SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO.

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    12-47-LNG - ORDER 3104 | Department of Energy REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 PDF icon October 2012 PDF icon April 2013 PDF icon October 2013 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG - ORDER 3106 SEMI-ANNUAL

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    3716 FTA | Department of Energy REPORTS - TEXAS LNG BROWNSVILLE LLC - FE DKT. 15-62-LNG - Order 3716 FTA SEMI-ANNUAL REPORTS - TEXAS LNG BROWNSVILLE LLC - FE DKT. 15-62-LNG - Order 3716 FTA PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR TEXAS LNG - TEXAS LNG - FTA - FE DKT. NO. 13-160-LNG - 3443 SEMI-ANNUAL REPORTS FOR DOWNEAST LNG, INC. - FT DKT. NO. 14-172-LNG - ORDER NO. 3600 (FTA) SEMI-ANNUAL REPORTS FOR FREEPORT LNG EXPANSION L.P. & FLNG

  7. SEMI-ANNUAL REPORTS FOR ANNOVA LNG COMMON INFRASTRUCTURE, LLC - FE DKT. NO.

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    13-140-LNG/14-004-CIC ORDERS 3394 AND 3464 | Department of Energy REPORTS FOR ANNOVA LNG COMMON INFRASTRUCTURE, LLC - FE DKT. NO. 13-140-LNG/14-004-CIC ORDERS 3394 AND 3464 SEMI-ANNUAL REPORTS FOR ANNOVA LNG COMMON INFRASTRUCTURE, LLC - FE DKT. NO. 13-140-LNG/14-004-CIC ORDERS 3394 AND 3464 PDF icon December 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications Annova LNG, LLC - 14-004-CIC SEMI-ANNUAL REPORTS FOR Cameron LNG, LLC - FE Dkt. No. 15-36-LNG - ORDER

  8. SEMI-ANNUAL REPORTS FOR Cameron LNG, LLC - FE Dkt. No. 15-36-LNG - ORDER

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3680 | Department of Energy Cameron LNG, LLC - FE Dkt. No. 15-36-LNG - ORDER 3680 SEMI-ANNUAL REPORTS FOR Cameron LNG, LLC - FE Dkt. No. 15-36-LNG - ORDER 3680 PDF icon October 2015 More Documents & Publications SEMI ANNUAL REPORTS - CAMERON LNG, LLC - FE DKT. NO. 14-204-LNG - ORDER NO. 3620 SEMI-ANNUAL REPORTS FOR CAMERON LNG LLC - DKT. NO. 11-162-LNG - ORDER 3391-A Semi-annual Reports for Cameron LNG LLC - Dk. No. 11-145-LNG - Order 3059

  9. SEMI-ANNUAL REPORTS FOR JORDAN COVE ENERGY PROJECT, L.P. - FE DKT. NO.

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    11-127-LNG - ORDER 3041 | Department of Energy JORDAN COVE ENERGY PROJECT, L.P. - FE DKT. NO. 11-127-LNG - ORDER 3041 SEMI-ANNUAL REPORTS FOR JORDAN COVE ENERGY PROJECT, L.P. - FE DKT. NO. 11-127-LNG - ORDER 3041 PDF icon April 2012 PDF icon October 2012 PDF icon April 2013 PDF icon October 2013 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR JORDAN COVE ENERGY FE DKT. NO. 12-32-LNG - ORDER 3413

  10. SEMI-ANNUAL REPORTS FOR LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORDER 3324 | Department of Energy LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG - ORDER 3324 SEMI-ANNUAL REPORTS FOR LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG - ORDER 3324 PDF icon October 2013 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR LAKE CHARLES LNG EXPORT COMPANY, LLC (formerly Trunkline LNG Export, LLC) - DK. NO. 13-04-LNG - ORDER 3252 FE DOCKET NO. 11-59-LNG EIS-0491: Draft

  11. SEMI-ANNUAL REPORTS FOR Louisiana LNG Energy LLC - FE DKT. NO 14-19-LNG -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORDER 3482 | Department of Energy Louisiana LNG Energy LLC - FE DKT. NO 14-19-LNG - ORDER 3482 SEMI-ANNUAL REPORTS FOR Louisiana LNG Energy LLC - FE DKT. NO 14-19-LNG - ORDER 3482 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR AMERICAN LNG MARKETING LLC - FTA - DKT. 14-209-LNG - ORDER NO. 3601 SEMI-ANNUAL REPORTS FOR AMERICAN LNG MARKETING LLC, FE DKT. 15-19-LNG - ORDER 3656 SEMI-ANNUAL REPORTS FOR MAIN PASS ENERGY

  12. SEMI-ANNUAL REPORTS FOR MAGNOLIA LNG, LLC - FE DKT. NO. 12-183-LNG - ORDER

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3245; 13-131-LNG ORDER 3406 | Department of Energy MAGNOLIA LNG, LLC - FE DKT. NO. 12-183-LNG - ORDER 3245; 13-131-LNG ORDER 3406 SEMI-ANNUAL REPORTS FOR MAGNOLIA LNG, LLC - FE DKT. NO. 12-183-LNG - ORDER 3245; 13-131-LNG ORDER 3406 PDF icon Feb. 26, 2013 thru Feb. 28, 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 PDF icon October 2014 (Order 3406) More Documents & Publications SEMI-ANNUAL REPORT FOR SCT&E LNG LLC - FE DKT. NO. 14-89-LNG - ORDER NO. 3566

  13. SEMI-ANNUAL REPORTS FOR PANGEA LNG (NORTH AMERICA) HOLDINGS, LLC - FE DKT.

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    NO. 12-174-LNG - ORDER 3227 | Department of Energy PANGEA LNG (NORTH AMERICA) HOLDINGS, LLC - FE DKT. NO. 12-174-LNG - ORDER 3227 SEMI-ANNUAL REPORTS FOR PANGEA LNG (NORTH AMERICA) HOLDINGS, LLC - FE DKT. NO. 12-174-LNG - ORDER 3227 PDF icon April 2014 PDF icon October 2013 PDF icon April 2013 More Documents & Publications QER - Comment of America's Natural Gas Alliance 2 Pangea LNG (North America) Holdings, LLC - 14-002-CIC (FE Dkt. No. 12-184-LNG New Company Name: NextDecade Partnerss,

  14. SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORDER 3106 | Department of Energy SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG - ORDER 3106 SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG - ORDER 3106 PDF icon October 2012 PDF icon April 2013 PDF icon October 2013 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 SEMI-ANNUAL REPORTS FOR FREEPORT LNG EXPANSION

  15. Magnetism and transport properties of epitaxial Fe-Ga thin films on GaAs(001)

    SciTech Connect (OSTI)

    Duong Anh Tuan; Shin, Yooleemi; Cho, Sunglae; Dang Duc Dung; Vo Thanh Son

    2012-04-01

    Epitaxial Fe-Ga thin films in disordered bcc {alpha}-Fe crystal structure (A2) have been grown on GaAs(001) by molecular beam epitaxy. The saturated magnetization (M{sub S}) decreased from 1371 to 1105 kA/m with increasing Ga concentration from 10.5 to 24.3 % at room temperature. The lattice parameter increased with the increase in Ga content because of the larger atomic radius of Ga atom than that of Fe. The increase in carrier density with Ga content caused in lower resistivity.

  16. Room temperature ferromagnetism in conducting α-(In{sub 1-x}Fe{sub

    Office of Scientific and Technical Information (OSTI)

    x}){sub 2}O{sub 3} alloy films (Journal Article) | SciTech Connect Room temperature ferromagnetism in conducting α-(In{sub 1-x}Fe{sub x}){sub 2}O{sub 3} alloy films Citation Details In-Document Search Title: Room temperature ferromagnetism in conducting α-(In{sub 1-x}Fe{sub x}){sub 2}O{sub 3} alloy films We have studied electronic transport and magnetic properties of α-(In{sub 1-x}Fe{sub x}){sub 2}O{sub 3} alloy films. Temperature dependence of resistivity of the films showed

  17. Structural and optical properties of ZnO and ZnO:Fe nanoparticles under

    Office of Scientific and Technical Information (OSTI)

    dense electronic excitations (Journal Article) | SciTech Connect Structural and optical properties of ZnO and ZnO:Fe nanoparticles under dense electronic excitations Citation Details In-Document Search Title: Structural and optical properties of ZnO and ZnO:Fe nanoparticles under dense electronic excitations We report on the changes in structural, morphological, and optical properties of sol-gel derived ZnO and ZnO:Fe nanoparticles due to dense electronic excitations produced by heavy ion

  18. A Series of Highly Stable Mesoporous Metalloporphyrin Fe-MOFs | Center for

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Gas SeparationsRelevant to Clean Energy Technologies | Blandine Jerome Series of Highly Stable Mesoporous Metalloporphyrin Fe-MOFs Previous Next List Kecheng Wang, Dawei Feng, Tian-Fu Liu, Jie Su, Shuai Yuan, Ying-Pin Chen, Mathieu Bosch, Xiaodong Zou, and Hong-Cai Zhou, J. Am. Chem. Soc. 136, 13983-13986 (2014) DOI: 10.1021/ja507269n ja-2014-07269n_0005 Abstract: A series of mesoporous metalloporphyrin Fe-MOFs, namely PCN-600(M) (M = Mn, Fe, Co, Ni, Cu), have been synthesized using the

  19. SEMI-ANNUAL REPORTS FOR ALASKA LNG PROJECT, LLC - FE DKT NO. 14-96-LNG -

    Energy Savers [EERE]

    ORDER 3643 (NFTA) | Department of Energy ALASKA LNG PROJECT, LLC - FE DKT NO. 14-96-LNG - ORDER 3643 (NFTA) SEMI-ANNUAL REPORTS FOR ALASKA LNG PROJECT, LLC - FE DKT NO. 14-96-LNG - ORDER 3643 (NFTA) PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR ALASKA LNG PROJECT LLC - FE DKT. NO. 14-96-LNG - ORDER NO. 3554 SEMI-ANNUAL REPORT - PORT ARTHUR LNG - DKT. NO. 15-53-LNG - ORD. 3698 Order 3643: Alaska LNG Project, LLC

  20. SEMI-ANNUAL REPORTS FOR SABINE PASS LIQUEFACTION, LLC - FE DKT. NO.

    Energy Savers [EERE]

    13-131-LNG - ORDER 3384 | Department of Energy SABINE PASS LIQUEFACTION, LLC - FE DKT. NO. 13-131-LNG - ORDER 3384 SEMI-ANNUAL REPORTS FOR SABINE PASS LIQUEFACTION, LLC - FE DKT. NO. 13-131-LNG - ORDER 3384 PDF icon April 2014 More Documents & Publications SEMI-ANNUAL REPORTS FOR SABINE PASS LIQUEFACTION, LLC - FE DKT. NO. 10-85-LNG; 10-111-LNG; 13-121-LNG; 14-31-LNG; 13-30-LNG; 13-42-LNG; 14-92-LNG SEMI-ANNUAL REPORTS FOR CHENIERE MARKETING, LLC AND CORPUS CHRISTI LIQUEFACTION, LLC

  1. SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG -

    Energy Savers [EERE]

    ORDER 3106 | Department of Energy SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG - ORDER 3106 SEMI-ANNUAL REPORTS FOR SOUTHERN LNG COMPANY - FE DKT. NO. 12-54-LNG - ORDER 3106 PDF icon October 2012 PDF icon April 2013 PDF icon October 2013 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORT - GULF LNG LIQUEFACTION COMPANY, LLC - FE DKT. NO. 12-47-LNG - ORDER 3104 SEMI-ANNUAL REPORTS FOR FREEPORT LNG EXPANSION

  2. The Utility of FeVO4 in Combination with Stabilized Titanias for Mobile SCR

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Application | Department of Energy The Utility of FeVO4 in Combination with Stabilized Titanias for Mobile SCR Application The Utility of FeVO4 in Combination with Stabilized Titanias for Mobile SCR Application Selective catalytic reduction studies with ammonia/NO model gas mixtures were used to screen mixed FeVO4/titania powders for activity in both fresh and aged conditions; reaction of ammonia in the absence of NO was also used as measure of ammonia oxidation tendency at elevated reaction

  3. FE's Advanced Combustion R&D Seeks Innovative Ways to Lower Cost of

    Office of Environmental Management (EM)

    Capturing Carbon Emissions from Coal Fired Power Plants | Department of Energy FE's Advanced Combustion R&D Seeks Innovative Ways to Lower Cost of Capturing Carbon Emissions from Coal Fired Power Plants FE's Advanced Combustion R&D Seeks Innovative Ways to Lower Cost of Capturing Carbon Emissions from Coal Fired Power Plants March 27, 2014 - 10:37am Addthis Learn more about the FE Advanced Combustion R&D. You've probably heard about carbon capture and storage (CCS), a suite of

  4. FE-Docket No. 99-1: Petition to intervene of Calpine Power Services Company

    Office of Environmental Management (EM)

    | Department of Energy FE-Docket No. 99-1: Petition to intervene of Calpine Power Services Company FE-Docket No. 99-1: Petition to intervene of Calpine Power Services Company Proposed open access requirement for international electric transmission facilities and delegation to the federal energy regulatory commission. Enclosed for filing are an original and fifteen copies of the petition to intervene of power service company in the above-captioned proceeding. PDF icon FE-Docket No. 99-1:

  5. Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC - FE Dkt. No.

    Office of Environmental Management (EM)

    10-161-LNG | Department of Energy 0-161-LNG Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC - FE Dkt. No. 10-161-LNG On May 17, 2013, the Office of Fossil Energy of the Department of Energy (DOE/FE) issued Order No. 3282 (FLEX I Conditional Order) to Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC, pursuant to section 3(a) of the Natural Gas Act (NGA). As discussed in the below PDF, DOE/FE subsequently amended Order No. 3282 to add FLNG Liquefaction 2, LLC and FLNG

  6. Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC - FE Dkt. No.

    Office of Environmental Management (EM)

    11-161-LNG | Department of Energy 1-161-LNG Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC - FE Dkt. No. 11-161-LNG On November 15, 2013, the Office of Fossil Energy of the Department of Energy (DOE/FE) issued Order No. 3357 (FLEX II Conditional Order) to Freeport LNG Expansion, L.P., FLNG Liquefaction, LLC, FLNG Liquefaction 2, LLC, and FLNG Liquefaction 3, LLC (collectively, FLEX) pursuant to section 3(a) of the Natural Gas Act (NGA). As discussed in the PDF below, DOE/FE

  7. Cheniere Marketing, LLC - FE Dkt. No. 14-31-LNG (Re-export) | Department

    Office of Environmental Management (EM)

    of Energy Cheniere Marketing, LLC - FE Dkt. No. 14-31-LNG (Re-export) Cheniere Marketing, LLC - FE Dkt. No. 14-31-LNG (Re-export) The Office of Fossil Energy (FE) of the Department of Energy (DOE) gives notice of receipt of an Application filed on March 7, 2014, by Cheniere Marketing, LLC (CMI), requesting blanket authorization to export liquefied natural gas (LNG) previously imported into the United States from foreign sources in a volume equivalent to approximately 500 Billion cubic feet

  8. Dominion Cove Point LNG, LP - FE Dkt. No 11-128-LNG | Department of

    Office of Environmental Management (EM)

    Energy Dominion Cove Point LNG, LP - FE Dkt. No 11-128-LNG Dominion Cove Point LNG, LP - FE Dkt. No 11-128-LNG ORDER CONDITIONALLY GRANTING LONG-TERM MULTI-CONTRACT AUTHORIZATION TO EXPORT LIQUEFIED NATURAL GAS BY VESSEL FROM THE COVE POINT LNG TERMINAL TO NON-FREE TRADE AGREEMENT NATIONS Based on a review of the complete record and for the reasons set forth below, DOE/FE has concluded that the opponents of the DCP Application have not demonstrated that the requested authorization will be

  9. SEMI-ANNUAL REPORT - G2 LNG LLC - FE DKT. NO. 15-44-LNG - ORDER 3682 |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy REPORT - G2 LNG LLC - FE DKT. NO. 15-44-LNG - ORDER 3682 SEMI-ANNUAL REPORT - G2 LNG LLC - FE DKT. NO. 15-44-LNG - ORDER 3682 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR - BEAR HEAD LNG CORPORATION AND BEAR HEAD (USA) LLC - FE DKT. NO. 15-33-LNG - ORDER 3681 SEMI-ANNUAL REPORT FOR SCT&E LNG LLC - FE DKT. NO. 14-89-LNG - ORDER NO. 3566 SEMI-ANNUAL REPORTS FOR LNG DEVELOPMENT COMPANY, LLC (D/B/A Oregon LNG) - FE DKT. NO. 12-48-LNG -

  10. Ab initio study of Fe{sub 2}MnZ (Al, Si, Ge) Heusler alloy using GGA approximation

    SciTech Connect (OSTI)

    Jain, Vivek Kumar Jain, Vishal Lakshmi, N. Venugopalan, K.

    2014-04-24

    Density functional theory based on FP-LAPW method used to investigate the electronic structure of Fe{sub 2}MnZ, shows that the total spin magnetic moment shows a trend consistent with the SlaterPauling curve. The Fe and Mn magnetic moment depend on choice of Z element although the magnetic moment of Z element is negative and less than 0.1 ?{sub B}. Spin polarization calculations evidence 100% spin polarization for Fe{sub 2}MnSi. Fe{sub 2}MnAl and Fe{sub 2}MnGe show metallic behavior with 93%, 98% spin polarization.

  11. Structural and magnetic phase transitions in Ca 0.73 Le 0.27 FeAs 2 with

    Office of Scientific and Technical Information (OSTI)

    electron-overdoped FeAs layers (Journal Article) | DOE PAGES Structural and magnetic phase transitions in Ca 0.73 Le 0.27 FeAs 2 with electron-overdoped FeAs layers This content will become publicly available on February 25, 2017 « Prev Next » Title: Structural and magnetic phase transitions in Ca 0.73 Le 0.27 FeAs 2 with electron-overdoped FeAs layers Authors: Jiang, Shan ; Liu, Chang ; Cao, Huibo ; Birol, Turan ; Allred, Jared M. ; Tian, Wei ; Liu, Lian ; Cho, Kyuil ; Krogstad, Matthew

  12. SEMI-ANNUAL REPORT FOR SCT&E LNG LLC - FE DKT. NO. 14-89-LNG - ORDER NO.

    Energy Savers [EERE]

    3566 | Department of Energy FOR SCT&E LNG LLC - FE DKT. NO. 14-89-LNG - ORDER NO. 3566 SEMI-ANNUAL REPORT FOR SCT&E LNG LLC - FE DKT. NO. 14-89-LNG - ORDER NO. 3566 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SCT&E LNG, LLC - FE Dkt. No. 14-89-LNG SCT&E LNG, LLC - FE DKT. NO. 14-98-LNG NFTA SCT&E LNG, LLC - FE Dkt. No. 14-72-LNG

  13. Structure of epitaxial (Fe,N) codoped rutile TiO2 thin films by x-ray absorption

    SciTech Connect (OSTI)

    Kaspar, Tiffany C.; Ney, A.; Mangham, Andrew N.; Heald, Steve M.; Joly, Yves; Ney, V.; Wilhelm, F.; Rogalev, A.; Yakou, Flora; Chambers, Scott A.

    2012-07-23

    Homoepitaxial thin films of Fe:TiO2 and (Fe,N):TiO2 were deposited on rutile(110) by molecular beam epitaxy. X-ray absorption near edge spectroscopy (XANES) spectra were collected at the Ti L-edge, Fe L-edge, O K-edge, N K-edge, and Ti K-edge. No evidence of structural disorder associated with a high concentration of oxygen vacancies is observed. Substitution of Fe for Ti could not be confirmed, although secondary phase Fe2O3 and metallic Fe can be ruled out. The similarity of the N K-edge spectra to O, and the presence of a strong x-ray linear dichroism (XLD) signal for the N K-edge, indicates that N is substitutional for O in the rutile lattice, and is not present as a secondary phase such as TiN. Simulations of the XANES spectra qualitatively confirm substitution, although N appears to be present in more than one local environment. Neither Fe:TiO2 nor (Fe,N):TiO2 exhibit intrinsic room temperature ferromagnetism, despite the presence of mixed valence Fe(II)/Fe(III) in the reduced (Fe,N):TiO2 film.

  14. Effects of Cr and Ni on Interdiffusion and Reaction between U and Fe-Cr-Ni Alloys

    SciTech Connect (OSTI)

    K. Huang; Y. Park; L. Zhou; K.R. Coffey; Y.H. Sohn; B.H. Sencer; J. R. Kennedy

    2014-08-01

    Metallic U-alloy fuel cladded in steel has been examined for high temperature fast reactor technology wherein the fuel cladding chemical interaction is a challenge that requires a fundamental and quantitative understanding. In order to study the fundamental diffusional interactions between U with Fe and the alloying effect of Cr and Ni, solid-to-solid diffusion couples were assembled between pure U and Fe, Fe15 wt.%Cr or Fe15 wt.%Cr15 wt.%Ni alloy, and annealed at high temperature ranging from 580 to 700 C. The microstructures and concentration profiles that developed from the diffusion anneal were examined by scanning electron microscopy, and X-ray energy dispersive spectroscopy (XEDS), respectively. Thick U6Fe and thin UFe2 phases were observed to develop with solubilities: up to 2.5 at.% Ni in U6(Fe,Ni), up to 20 at.%Cr in U(Fe, Cr)2, and up to 7 at.%Cr and 14 at.% Ni in U(Fe, Cr, Ni)2. The interdiffusion and reactions in the U vs. Fe and U vs. FeCrNi exhibited a similar temperature dependence, while the U vs. FeCr diffusion couples, without the presence of Ni, yielded greater activation energy for the growth of intermetallic phases lower growth rate at lower temperature but higher growth rate at higher temperature.

  15. Microstructure and magnetic properties of FeCo epitaxial thin films grown on MgO single-crystal substrates

    SciTech Connect (OSTI)

    Shikada, Kouhei; Ohtake, Mitsuru; Futamoto, Masaaki; Kirino, Fumiyoshi

    2009-04-01

    FeCo epitaxial films were prepared on MgO(100), MgO(110), and MgO(111) substrates by ultrahigh vacuum molecular beam epitaxy. FeCo thin films with (100), (211), and (110) planes parallel to the substrate surface grow on respective MgO substrates. FeCo/MgO interface structures are studied by high-resolution cross-sectional transmission electron microscopy and the epitaxial growth mechanism is discussed. Atomically sharp boundaries are recognized between the FeCo thin films and the MgO substrates where misfit dislocations are introduced in the FeCo thin films presumably to decrease the lattice misfits. Misfit dislocations are observed approximately every 9 and 1.4 nm in FeCo thin film at the FeCo/MgO(100) and the FeCo/MgO(110) interfaces, respectively. X-ray diffraction analysis indicates that the lattice spacing measured parallel to the single-crystal substrate surfaces are in agreement within 0.1% with those of the respective bulk values of Fe{sub 50}Co{sub 50} alloy crystal, showing that the FeCo film strain is very small. The magnetic anisotropies of these epitaxial films basically reflect the magnetocrystalline anisotropy of bulk FeCo alloy crystal.

  16. Determination of the Fe magnetic anisotropies and the CoO frozen spins in epitaxial CoO/Fe/Ag(001)

    SciTech Connect (OSTI)

    Meng, J. Li, Y.; Park, J. S.; Jenkins, C. A.; Arenholz, E.; Scholl, A.; Tan, A.; Son, H.; Zhao, H. W.; Hwang, Chanyong; Qiu, Z. Q.

    2011-04-28

    CoO/Fe/Ag(001) films were grown epitaxially and studied by X-ray Magnetic Circular Dichroism (XMCD) and X-ray Magnetic Linear Dichroism (XMLD). After field cooling along the Fe[100] axis to 80 K, exchange bias, uniaxial anisotropy, and 4-fold anisotropy of the films were determined by hysteresis loop and XMCD measurements by rotating the Fe magnetization within the film plane. The CoO frozen spins were determined by XMLD measurement as a function of CoO thickness.We find that among the exchange bias, uniaxial anisotropy, and 4-fold anisotropy, only the uniaxial magnetic anisotropy follows thickness dependence of the CoO frozen spins.

  17. Study of the effect of plasma-striking atmosphere on Fe-oxidation in thermal dc arc-plasma processing

    SciTech Connect (OSTI)

    Banerjee, I.; Khollam, Y. B.; Mahapatra, S. K.; Das, A. K.; Bhoraskar, S. V.

    2010-11-15

    The effect of plasma-striking atmosphere: air and air+Ar-gas on the crystallization of Fe-oxide phases was studied using dc thermal arc-plasma processing route. The powders were characterized by x-ray diffraction, vibrating sample magnetometry, transmission electron microscopy, and Moessbauer spectroscopy techniques. At room temperature and O{sub 2} rich atmosphere, arc-evaporated Fe{sup 2+} ions oxidize into either {gamma}-Fe{sub 2}O{sub 3} or Fe{sub 3}O{sub 4} depending upon the combining ratio of Fe with molecular O{sub 2}. Fe/O ratio could be adjusted using proper flow rate of Ar gas to crystallize the pure {gamma}-Fe{sub 2}O{sub 3}.

  18. Large Scale DD Simulation Results for Crystal Plasticity Parameters in Fe-Cr And Fe-Ni Systems

    SciTech Connect (OSTI)

    Zbib, Hussein M.; Li, Dongsheng; Sun, Xin; Khaleel, Mohammad A.

    2012-04-30

    The development of viable nuclear energy source depends on ensuring structural materials integrity. Structural materials in nuclear reactors will operate in harsh radiation conditions coupled with high level hydrogen and helium production, as well as formation of high density of point defects and defect clusters, and thus will experience severe degradation of mechanical properties. Therefore, the main objective of this work is to develop a capability that predicts aging behavior and in-service lifetime of nuclear reactor components and, thus provide an instrumental tool for tailoring materials design and development for application in future nuclear reactor technologies. Towards this end goal, the long term effort is to develop a physically based multiscale modeling hierarchy, validated and verified, to address outstanding questions regarding the effects of irradiation on materials microstructure and mechanical properties during extended service in the fission and fusion environments. The focus of the current investigation is on modern steels for use in nuclear reactors including high strength ferritic-martensitic steels (Fe-Cr-Ni alloys). The effort is to develop a predicative capability for the influence of irradiation on mechanical behavior. Irradiation hardening is related to structural information crossing different length scales, such as composition, dislocation, and crystal orientation distribution. To predict effective hardening, the influence factors along different length scales should be considered. Therefore, a hierarchical upscaling methodology is implemented in this work in which relevant information is passed between models at three scales, namely, from molecular dynamics to dislocation dynamics to dislocation-based crystal plasticity. The molecular dynamics (MD) was used to predict the dislocation mobility in body centered cubic (bcc) Fe and its Ni and Cr alloys. The results are then passed on to dislocation dynamics to predict the critical resolved shear stress (CRSS) from the evolution of local dislocation and defects. In this report the focus is on the results obtained from large scale dislocation dynamics simulations. The effect of defect density, materials structure was investigated, and evolution laws are obtained. These results will form the bases for the development of evolution and hardening laws for a dislocation-based crystal plasticity framework. The hierarchical upscaling method being developed in this project can provide a guidance tool to evaluate performance of structural materials for next-generation nuclear reactors. Combined with other tools developed in the Nuclear Energy Advanced Modeling and Simulation (NEAMS) program, the models developed will have more impact in improving the reliability of current reactors and affordability of new reactors.

  19. Low-energy planar magnetic defects in BaFe2As2: Nanotwins, twins...

    Office of Scientific and Technical Information (OSTI)

    twins, antiphase, and domain boundaries Citation Details In-Document Search Title: Low-energy planar magnetic defects in BaFe2As2: Nanotwins, twins, antiphase, and domain...

  20. Probing the failure mechanism of nanoscale LiFePO₄ for Li-ion batteries

    SciTech Connect (OSTI)

    Gu, Meng; Shi, Wei; Zheng, Jianming; Yan, Pengfei; Zhang, Ji-guang; Wang, Chongmin

    2015-05-18

    LiFePO4 is a high power rate cathode material for lithium ion battery and shows remarkable capacity retention, featuring a 91% capacity retention after 3300 cycles. In this work, we use high-resolution transmission electron microscopy (HRTEM), energy dispersive x-ray spectroscopy (EDS), and electron energy loss spectroscopy (EELS) to study the gradual capacity fading mechanism of LiFePO4 materials. We found that upon prolonged electrochemical cycling of the battery, the LiFePO4 cathode shows surface amorphization and loss of oxygen species, which directly contribute to the gradual capacity fading of the battery. The finding is of great importance for the design and improvement of new LiFePO4 cathode for high-energy and high-power rechargeable battery for electric transportation.

  1. Sabine Pass Liquefaction, LLC FE Dkt. No 15-171-LNG

    Broader source: Energy.gov [DOE]

    The Office of Fossil Energy (FE) of the Department of Energy (DOE) gives notice of receipt of an application (Application), filed on November 6, 2015, by Sabine Pass Liquefaction, LLC (Sabine Pass)...

  2. Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC - FE...

    Office of Environmental Management (EM)

    0-161-LNG Freeport LNG Expansion, L.P. and FLNG Liquefaction, LLC - FE Dkt. No. 10-161-LNG On May 17, 2013, the Office of Fossil Energy of the Department of Energy (DOEFE) issued ...

  3. Phonon softening near the structural transition in BaFe2As2 observed...

    Office of Scientific and Technical Information (OSTI)

    Phonon softening near the structural transition in BaFe2As2 observed by inelastic x-ray scattering Citation Details In-Document Search Title: Phonon softening near the structural ...

  4. Flint Hills Resources, LP- FE Dkt. No. 15-168-LNG

    Broader source: Energy.gov [DOE]

    The Office of Fossil Energy (FE) of the Department of Energy (DOE) gives notice of receipt of an application, filed on November 5, 2015, by Flint Hills Resources, LP (Flint Hills), requesting long...

  5. Reactions of Deuterated Methanol (CD3OD) on Fe3O4(111)

    SciTech Connect (OSTI)

    Li, Zhisheng; Potapenko, Denis V.; Rim, Kwang T.; Flytzani-Stephanopoulos, Maria; Flynn, George; Osgood, Richard; Wen, Xiaodong; Batista, Enrique R.

    2015-01-15

    We report an experimental and theoretical investigation of the decomposition (partial oxidation) of deuterated methanol (CD3OD) on a single-crystal Fe3O4(111) surface. The crystal surface contains majority areas of a Fe-terminated Fe3O4(111) surface as well as smaller regions of O-terminated FeO(111) or biphase surface reconstruction. Our investigation uses a combination of scanning tunneling microscopy, temperature-programmed desorption, and density functional theory calculations to examine the surface reactions and adsorbates as a function of coverage. Our studies show that the reaction of methanol on this ironoxide surface is highly sensitive to atomic-level surface reconstructions

  6. Performance Evaluation of Microporous Separator in Fe/V Redox Flow Battery

    SciTech Connect (OSTI)

    Wei, Xiaoliang; Luo, Qingtao; Li, Bin; Nie, Zimin; Miller, Eric; Chambers, Jeff; Sprenkle, Vincent L.; Wang, Wei

    2013-04-08

    The newly developed Fe/V redox flow battery has demonstrated attractive cell performance. However, the deliverable energy density is relatively inferior due to the low cell voltage. To compensate this disadvantage and compete with other redox flow battery systems, cost reduction of the Fe/V system is necessary. This paper describes evaluation of hydrocarbon-based Daramic microporous separators for use in the Fe/V system. The separator B having ion exchange capacity demonstrated excellent capacity retention capability. Separator B exhibited energy efficiency above 65% over a broad temperature range of 5-50oC and at current densities up to 80mA/cm2. Plus, separator B is very inexpensive and has exceptional mechanical properties. Therefore, this separator shows great potential to replace the expensive Nafion membrane. This will drive down the capital cost and make the Fe/V system a promising low-cost energy storage technology.

  7. Equation of state and phase diagram of Fe-16Si alloy as a candidate...

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Search Results Journal Article: Equation of state and phase diagram of Fe-16Si alloy as a candidate component of Earths core Citation Details In-Document Search ...

  8. Preservation of Fe(II) by Carbon-Rich Matrices in Hydrothermal...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Preservation of Fe(II) by Carbon-Rich Matrices in Hydrothermal Plumes Print Despite the considerable amount of iron that enters the oceans from the continents and from hydrothermal...

  9. Spin-Glass Behavior in a Giant Unit Cell Compound Tb117Fe52Ge113...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Spin-Glass Behavior in a Giant Unit Cell Compound Tb117Fe52Ge113.8(1) Citation Details In-Document Search Title: Spin-Glass Behavior in a Giant Unit Cell Compound ...

  10. Pervasive faint Fe XIX emission from a solar active region observed...

    Office of Scientific and Technical Information (OSTI)

    from a solar active region observed with EUNIS-13: Evidence for nanoflare heating Citation Details In-Document Search Title: Pervasive faint Fe XIX emission from a solar active ...

  11. Structural and optical properties of ZnO and ZnO:Fe nanoparticles...

    Office of Scientific and Technical Information (OSTI)

    We report on the changes in structural, morphological, and optical properties of sol-gel derived ZnO and ZnO:Fe nanoparticles due to dense electronic excitations produced by heavy ...

  12. Spin-Glass Behavior in a Giant Unit Cell Compound Tb117Fe52Ge113...

    Office of Scientific and Technical Information (OSTI)

    dependence of the freezing temperature to the critical slowing down model and Vogel-Fulcher law strongly suggest the formation of cluster glass in the Tb117Fe52Ge113.8(1) system. ...

  13. Air Flow North America Corp. – FE Dkt. No. 14-53-LNG (Re-export)

    Broader source: Energy.gov [DOE]

    The Office of Fossil Energy (FE) of the Department of Energy (DOE) gives notice of receipt of an application filed on March 25, 2014, by Air Flow North America Corp. (AIR FLOW) requesting short...

  14. Graphene Modified LiFePO4 Cathode Materials for High Power Lithium ion Batteries

    SciTech Connect (OSTI)

    Zhou, X.; Wang, F.; Zhu, Y.; Liu, Z.

    2011-01-24

    Graphene-modified LiFePO{sub 4} composite has been developed as a Li-ion battery cathode material with excellent high-rate capability and cycling stability. The composite was prepared with LiFePO{sub 4} nanoparticles and graphene oxide nanosheets by spray-drying and annealing processes. The LiFePO{sub 4} primary nanoparticles embedded in micro-sized spherical secondary particles were wrapped homogeneously and loosely with a graphene 3D network. Such a special nanostructure facilitated electron migration throughout the secondary particles, while the presence of abundant voids between the LiFePO{sub 4} nanoparticles and graphene sheets was beneficial for Li{sup +} diffusion. The composite cathode material could deliver a capacity of 70 mAh g{sup -1} at 60C discharge rate and showed a capacity decay rate of <15% when cycled under 10C charging and 20C discharging for 1000 times.

  15. Significantly Shorter Fe-S Bond in Cytochrome P450-I is Consistent...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    analyzed at Beam Line 7-3 at SSRL. Extended x-ray absorption fine structure (EXAFS) studies on multiple sets of samples revealed that the Fe-S bond in P450-I was in fact 0.09 ...

  16. Transition-metal and metalloid substitutions in L1(0)-ordered FeNi

    SciTech Connect (OSTI)

    Manchanda, P; Skomski, R; Bordeaux, N; Lewis, LH; Kashyap, A

    2014-05-07

    The effect of atomic substitutions on the magnetization, exchange, and magnetocrystalline anisotropy energy of L1(0)-ordered FeNi (tetrataenite) is computationally investigated. The compound naturally occurs in meteorites but has attracted renewed attention as a potential material for permanent magnets, and elemental additives will likely be necessary to facilitate the phase formation. Our density functional theory calculations use the Vienna ab-initio simulation package, applied to 4-atom unit cells of Fe2XNi and 32-atom supercells (X = Al, P, S, Ti, V, Cr, Mn, Fe, Co). While it is found that most additives deteriorate the magnetic properties, there are exceptions: excess substitutional Fe and Co additions improve the magnetization, whereas Cr, S, and interstitial B additions improve the magnetocrystalline anisotropy. (C) 2014 AIP Publishing LLC.

  17. Transition-metal and metalloid substitutions in L1{sub 0}-ordered FeNi

    SciTech Connect (OSTI)

    Manchanda, Priyanka; Skomski, Ralph; Bordeaux, N.; Lewis, L. H.; Kashyap, Arti

    2014-05-07

    The effect of atomic substitutions on the magnetization, exchange, and magnetocrystalline anisotropy energy of L1{sub 0}-ordered FeNi (tetrataenite) is computationally investigated. The compound naturally occurs in meteorites but has attracted renewed attention as a potential material for permanent magnets, and elemental additives will likely be necessary to facilitate the phase formation. Our density functional theory calculations use the Vienna ab-initio simulation package, applied to 4-atom unit cells of Fe{sub 2}XNi and 32-atom supercells (X?=?Al, P, S, Ti, V, Cr, Mn, Fe, Co). While it is found that most additives deteriorate the magnetic properties, there are exceptions: excess substitutional Fe and Co additions improve the magnetization, whereas Cr, S, and interstitial B additions improve the magnetocrystalline anisotropy.

  18. Thickness-dependent coherent phonon frequency in ultrathin FeSe...

    Office of Scientific and Technical Information (OSTI)

    Thickness-dependent coherent phonon frequency in ultrathin FeSeSrTiO3 films Citation Details In-Document Search Title: Thickness-dependent coherent phonon frequency in ultrathin ...

  19. Thermal stability comparison of nanocrystalline Fe-based binary alloy pairs

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Clark, Blythe G.; Hattar, Khalid Mikhiel; Marshall, Michael Thomas; Chookajorn, Tonghai; Boyce, Brad L.; Schuh, Christopher A.

    2016-03-24

    Here, the widely recognized property improvements of nanocrystalline (NC) materials have generated significant interest, yet have been difficult to realize in engineering applications due to the propensity for grain growth in these interface-dense systems. While traditional pathways to thermal stabilization can slow the mobility of grain boundaries, recent theories suggest that solute segregation in NC alloy can reduce the grain boundary energy such that thermodynamic stabilization is achieved. Following the predictions of Murdock et al., here we compare for the first time the thermal stability of a predicted NC stable alloy (Fe-10at.% Mg) with a predicted non-NC stable alloy (Fe-10at.%more » Cu) using the same processing and characterization methodologies. Results indicate improved thermal stability of the Fe-Mg alloy in comparison to the Fe-Cu, and observed microstructures are consistent with those predicted by Monte Carlo simulations.« less

  20. Duo at Santa Fe's Monte del Sol Charter School takes top award...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    5th New Mexico Supercomputing Challenge Duo at Santa Fe's Monte del Sol Charter School takes top award in 25th New Mexico Supercomputing Challenge Meghan Hill and Katelynn James...

  1. Approaching isotropy in the vortex system of SmFeAs(O,F) at extreme...

    Office of Scientific and Technical Information (OSTI)

    Approaching isotropy in the vortex system of SmFeAs(O,F) at extreme magnetic fields Citation Details In-Document Search Title: Approaching isotropy in the vortex system of...

  2. Strain relaxation and enhanced perpendicular magnetic anisotropy in BiFeO{sub 3}:CoFe{sub 2}O{sub 4} vertically aligned nanocomposite thin films

    SciTech Connect (OSTI)

    Zhang, Wenrui; Jiao, Liang; Li, Leigang [Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States); Jian, Jie; Khatkhatay, Fauzia; Chu, Frank [Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States); Chen, Aiping [Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States); Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Jia, Quanxi [Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); MacManus-Driscoll, Judith L. [Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom); Wang, Haiyan, E-mail: wangh@ece.tamu.edu [Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States); Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States)

    2014-02-10

    Self-assembled BiFeO{sub 3}:CoFe{sub 2}O{sub 4} (BFO:CFO) vertically aligned nanocomposite thin films have been fabricated on SrTiO{sub 3} (001) substrates using pulsed laser deposition. The strain relaxation mechanism between BFO and CFO with a large lattice mismatch has been studied by X-ray diffraction and transmission electron microscopy. The as-prepared nanocomposite films exhibit enhanced perpendicular magnetic anisotropy as the BFO composition increases. Different anisotropy sources have been investigated, suggesting that spin-flop coupling between antiferromagnetic BFO and ferrimagnetic CFO plays a dominant role in enhancing the uniaxial magnetic anisotropy.

  3. Light, alpha, and Fe-peak element abundances in the galactic bulge

    SciTech Connect (OSTI)

    Johnson, Christian I.; Rich, R. Michael; Kobayashi, Chiaki; Kunder, Andrea; Koch, Andreas E-mail: rmr@astro.ucla.edu E-mail: akunder@aip.de

    2014-10-01

    We present radial velocities and chemical abundances of O, Na, Mg, Al, Si, Ca, Cr, Fe, Co, Ni, and Cu for a sample of 156 red giant branch stars in two Galactic bulge fields centered near (l, b) = (+5.25,3.02) and (0,12). The (+5.25,3.02) field also includes observations of the bulge globular cluster NGC 6553. The results are based on high-resolution (R ? 20,000), high signal-to-noise ration (S/N ? 70) FLAMES-GIRAFFE spectra obtained through the European Southern Observatory archive. However, we only selected a subset of the original observations that included spectra with both high S/N and that did not show strong TiO absorption bands. This work extends previous analyses of this data set beyond Fe and the ?-elements Mg, Si, Ca, and Ti. While we find reasonable agreement with past work, the data presented here indicate that the bulge may exhibit a different chemical composition than the local thick disk, especially at [Fe/H] ? 0.5. In particular, the bulge [?/Fe] ratios may remain enhanced to a slightly higher [Fe/H] than the thick disk, and the Fe-peak elements Co, Ni, and Cu appear enhanced compared to the disk. There is also some evidence that the [Na/Fe] (but not [Al/Fe]) trends between the bulge and local disk may be different at low and high metallicity. We also find that the velocity dispersion decreases as a function of increasing [Fe/H] for both fields, and do not detect any significant cold, high-velocity populations. A comparison with chemical enrichment models indicates that a significant fraction of hypernovae may be required to explain the bulge abundance trends, and that initial mass functions that are steep, top-heavy (and do not include strong outflow), or truncated to avoid including contributions from stars >40 M {sub ?} are ruled out, in particular because of disagreement with the Fe-peak abundance data. For most elements, the NGC 6553 stars exhibit abundance trends nearly identical to comparable metallicity bulge field stars. However, the star-to-star scatter and mean [Na/Fe] ratios appear higher in the cluster, perhaps indicating additional self-enrichment.

  4. Surface modification to improve fireside corrosion resistance of Fe-Cr ferritic steels

    DOE Patents [OSTI]

    Park, Jong-Hee (Clarendon Hills, IL); Natesan, Krishnamurti (Naperville, IL); Rink, David L. (Mokena, IL)

    2010-03-16

    An article of manufacture and a method for providing an Fe--Cr ferritic steel article of manufacture having a surface layer modification for corrosion resistance. Fe--Cr ferritic steels can be modified to enhance their corrosion resistance to liquid coal ash and other chemical environments, which have chlorides or sulfates containing active species. The steel is modified to form an aluminide/silicide passivating layer to reduce such corrosion.

  5. Heat treatment of NiCrFe alloy to optimize resistance to intergrannular stress corrosion

    DOE Patents [OSTI]

    Steeves, Arthur F. (Schenectady, NY); Bibb, Albert E. (Clifton Park, NY)

    1984-01-01

    A process of producing a NiCrFe alloy having a high resistance to stress corrosion cracking comprising heating a NiCrFe alloy to a temperature sufficient to enable the carbon present in the alloy body in the form of carbide deposits to enter into solution, rapidly cool the alloy body, and heat the cooled body to a temperature between 1100.degree. to 1500.degree. F. for about 1 to 30 hours.

  6. Morphotropic Phase Boundaries in Ferromagnets: Tb 1 - x Dy x Fe 2 Alloys

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect Morphotropic Phase Boundaries in Ferromagnets: Tb 1 - x Dy x Fe 2 Alloys Citation Details In-Document Search Title: Morphotropic Phase Boundaries in Ferromagnets: Tb 1 - x Dy x Fe 2 Alloys Authors: Bergstrom, Richard ; Wuttig, Manfred ; Cullen, James ; Zavalij, Peter ; Briber, Robert ; Dennis, Cindi ; Garlea, V. Ovidiu ; Laver, Mark Publication Date: 2013-07-03 OSTI Identifier: 1103738 Type: Publisher's Accepted Manuscript Journal Name: Physical Review

  7. Pairing state with a time-reversal symmetry breaking in FeAs-based

    Office of Scientific and Technical Information (OSTI)

    superconductors (Technical Report) | SciTech Connect Technical Report: Pairing state with a time-reversal symmetry breaking in FeAs-based superconductors Citation Details In-Document Search Title: Pairing state with a time-reversal symmetry breaking in FeAs-based superconductors We investigate the competition between the extended s{+-} wave and dx2-y2 -wave pairing order parameters in the iron-based superconductors. Because of the frustrating pairing interactions among the electron and the

  8. Hydrocarbon Inhibition and HC Storage Modeling in Fe-Zeolite Catalysts for

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    HD Diesel Engines | Department of Energy Inhibition and HC Storage Modeling in Fe-Zeolite Catalysts for HD Diesel Engines Hydrocarbon Inhibition and HC Storage Modeling in Fe-Zeolite Catalysts for HD Diesel Engines Investigating the dynamics between various aftertreatment devices for overall optimal performance to simultaneously reduce NOx and PM. Ex: HC poisoning/inhibition on zeolites1, catalyst aging, etc. PDF icon deer09_devarakonda.pdf More Documents & Publications The Effects of

  9. Materials Data on FeS2 (SG:205) by Materials Project (Dataset) | Data

    Office of Scientific and Technical Information (OSTI)

    Explorer FeS2 (SG:205) by Materials Project Title: Materials Data on FeS2 (SG:205) by Materials Project Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations Authors: Kristin Persson Publication Date: 2014-11-02 OSTI Identifier: 1183906 Report Number(s): mp-226 DOE Contract

  10. Structural complexity of simple Fe[subscript 2]O[subscript 3] at high

    Office of Scientific and Technical Information (OSTI)

    pressures and temperatures (Journal Article) | SciTech Connect Journal Article: Structural complexity of simple Fe[subscript 2]O[subscript 3] at high pressures and temperatures Citation Details In-Document Search Title: Structural complexity of simple Fe[subscript 2]O[subscript 3] at high pressures and temperatures Authors: Bykova, E. ; Dubrovinsky, L. ; Dubrovinskaia, N. ; Bykov, M. ; McCammon, C. ; Ovsyannikov, S. V. ; Liermann, H. -P. ; Kupenko, I. ; Chumakov, A. I. ; Rüffer, R. ;

  11. The thermal equation of state of (Mg, Fe)SiO[subscript 3] bridgmanite

    Office of Scientific and Technical Information (OSTI)

    (perovskite) and implications for lower mantle structures (Journal Article) | SciTech Connect SciTech Connect Search Results Journal Article: The thermal equation of state of (Mg, Fe)SiO[subscript 3] bridgmanite (perovskite) and implications for lower mantle structures Citation Details In-Document Search Title: The thermal equation of state of (Mg, Fe)SiO[subscript 3] bridgmanite (perovskite) and implications for lower mantle structures Authors: Wolf, Aaron S. ; Jackson, Jennifer M. ; Dera,

  12. FE-Funded Study Released on Key Factors Affecting China Shale Gas

    Office of Environmental Management (EM)

    Development | Department of Energy FE-Funded Study Released on Key Factors Affecting China Shale Gas Development FE-Funded Study Released on Key Factors Affecting China Shale Gas Development September 12, 2014 - 7:14am Addthis As many people know, over the past decade the United States has experienced a shale gas revolution that has beneficially transformed its energy landscape. In witnessing this transformation, other nations with significant shale resources are understandably interested in

  13. A Study of Groundwater Matrix Effects for the Destruction of Trichloroethylene Using Fe/Pd Nanoaggregates

    SciTech Connect (OSTI)

    meyer, D E; Hampson, Steve; ormsbee, Lindelle; Bhattacharyya, Dibakar

    2008-06-01

    Fe nanoaggregates have been prepared using the sodium borohydride reduction method and post-coated with Pd using aqueous phase electro-depostition. The Fe/Pd particles have been used to examine dechlorination of TCE with regard to matrix effects using materials representative of examine dechlorination of TCE with regard to matrix effects using materials representative of a potential zero-valent metal remediation site surrounding the Paducah Gaseous Diffusion Plant in Paducah, KY.

  14. Synthesis, Structure, and Spectroscopy of Epitaxial EuFeO3 Thin Films

    SciTech Connect (OSTI)

    Choquette, Amber K.; Colby, Robert J.; Moon, E. J.; Schleputz, C. M.; Scafetta, Mark D.; Keavney, David J.; May, Steven J.

    2015-03-04

    Rare earth iron perovskites RFeO3, where R is a rare earth cation, exhibit an array of magnetic, catalytic, optical and electrochemical properties. Here we study EuFeO3 films synthesized by molecular beam epitaxy in order to better understand the optical properties of ferrites. A combination of x-ray diffraction, x-ray reflectivity, Rutherford backscattering spectroscopy, and scanning transmission electron microscopy were used to characterize the film structure and cation composition. X-ray absorption spectroscopy confirms the nominal 3+ valence states of Eu and Fe. The optical properties of EuFeO3 were investigated using variable angle spectroscopic ellipsometry between the phonon energies of 1.25 to 5 eV. We find that EuFeO3 is a semiconductor with an onset of optical absorption near 2.5 eV. The absorption spectrum of EuFeO3 is blue-shifted with respect to LaFeO3 films, a result that is attributed to the structural differences of the two materials.

  15. Optimization of LiFePO4 Nanoparticle Suspensions with Polyethyleneimine for Aqueous Processing

    SciTech Connect (OSTI)

    Li, Jianlin; Armstrong, Beth L; Kiggans, Jim; Daniel, Claus; Wood III, David L

    2012-01-01

    Addition of dispersants to aqueous based lithium-ion battery electrode formulations containing LiFePO{sub 4} is critical to obtaining a stable suspension. The resulting colloidal suspensions enable dramatically improved coating deposition when processing electrodes. This research examines the colloidal chemistry modifications based on polyethyleneimine (PEI) addition and dispersion characterization required to produce high quality electrode formulations and coatings for LiFePO{sub 4} active cathode material. The isoelectric point, a key parameter in characterizing colloidal dispersion stability, of LiFePO{sub 4} and super P C45 were determined to be pH = 4.3 and 3.4, respectively. PEI, a cationic surfactant, was found to be an effective dispersant. It is demonstrated that 1.0 wt % and 0.5 wt % PEI were required to stabilize the LiFePO{sub 4} and super P C45 suspension, respectively. LiFePO{sub 4} cathode suspensions with 1.5 wt % PEI demonstrated the best dispersibility of all components, as evidenced by viscosity and agglomerate size of the suspensions and elemental distribution within dry cathodes. The addition of PEI significantly improved the LiFePO{sub 4} performance.

  16. Bulk amorphous Pd{endash}Ni{endash}Fe{endash}P alloys: Preparation and characterization

    SciTech Connect (OSTI)

    Shen, T.D.; He, Y.; Schwarz, R.B. [Materials Science and Technology Division, MS K765, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

    1999-05-01

    Bulk amorphous alloys of Pd{sub x}Ni{sub y}Fe{sub 80{minus}x{minus}y}P{sub 20} (25{le}x{le}60, 20{le}y{le}55, x+y{ge}60) were prepared by a flux-melting and water-quenching method. Seven-mm diameter glassy rods of Pd{sub 40}Ni{sub 40{minus}x}Fe{sub x}P{sub 20} (0{le}x{le}20) were studied in greater detail. For these alloys, the difference between the crystallization and glass transition temperatures ranges from 102 K for x=0 to 53 K for x=20. In this composition range, the reduced glass transition temperature, T{sub rg}, ranges from 0.66 to 0.57. The change in density upon crystallization ranges from 0.24{plus_minus}0.04{percent} for x=0 to 1.33{plus_minus}0.24{percent} for x=10. The partial molar volume of Fe in amorphous Pd{sub 40}Ni{sub 40{minus}x}Fe{sub x}P{sub 20} alloys is significantly larger than the molar volume of (metastable) fcc Fe. This, as well as a comparison with the molar volumes of crystalline compounds, suggests chemically selective Fe{endash}Pd bonding in these glasses. {copyright} {ital 1999 Materials Research Society.}

  17. Reaction-Based Reactive Transport Modeling of Fe(III) and U(V) Reduction

    SciTech Connect (OSTI)

    Burgos, William D.; Roden, Eric E.; Yeh, Gour-Tsyh

    2005-06-01

    Our new research project (started Fall 2004) was funded by a grant to The Pennsylvania State University, University of Central Florida, and The University of Alabama in the Integrative Studies Element of the NABIR Program (DE-FG04-ER63914/63915/63196). Our previous NABIR project (DE-FG02-01ER63180/63181/63182, funded within the Biotransformation Element) focused on (1) microbial reduction of Fe(III) and U(VI) individually, and concomitantly in natural sediments, (2) Fe(III) oxide surface chemistry, specifically with respect to reactions with Fe(II) and U(VI), (3) the influence of humic substances on Fe(III) and U(VI) bioreduction, and on U(VI) complexation, and (4) the development of reaction-based reactive transport biogeochemical models to numerically simulate our experimental results. The new project focuses on the development of a mechanistic understanding and quantitative models of coupled Fe(III)/U(VI) reduction in FRC Area 2 sediments. This work builds on our previous studies of microbial Fe(III) and U(VI) reduction, and is directly aligned with the Scheibe et al. NABIR FRC Field Project at Area 2.

  18. Pressure-temperature stability studies of FeOOH using x-ray diffraction

    SciTech Connect (OSTI)

    Gleason, Arianna E.; Jeanloz, Raymond; Kunz, Martin

    2008-07-21

    The Mie-Gruneisen formalism is used to fit a Birch-Murnaghan equation of state to high-temperature (T), high-pressure (P) X-ray diffraction unit-cell volume (V) measurements on synthetic goethite (alpha-FeOOH) to combined conditions of T = 23-250o C and P = 0-29.4 GPa. We find the zero-pressure thermal expansion coefficient of goethite to be alpha0 = 2.3 (+-0.6) x 10-5 K-1 over this temperature range. Our data yield zero-pressure compressional parameters: V0 = 138.75 (+- 0.02) Angstrom3, bulk modulus K0 = 140.3 (+- 3.7) GPa, pressure derivative K0' = 4.6 (+- 0.4), Gruneisen parameter gamma0 = 0.91 (+- 0.07), and Debye temperature Theta0 = 740 (+- 5) K. We identify decomposition conditions for 2alpha-FeOOH --> alpha-Fe2O3 + H2O at 1 - 8 GPa and 100-400oC, and the polymorphic transition from alpha-FeOOH (Pbnm) to epsilon-FeOOH (P21mn). The non-quenchable, high-pressure epsilon-FeOOH phase P-V data are fitted to a second-order (Birch) equation of state yielding, K0 = 158 (+- 5) GPa and V0 = 66.3 (+- 0.5) Angstrom3.

  19. Microbial Reductive Transformation of Phyllosilicate Fe(III) and U(VI) in Fluvial Subsurface Sediments

    SciTech Connect (OSTI)

    Lee, Ji-Hoon; Fredrickson, Jim K.; Kukkadapu, Ravi K.; Boyanov, Maxim I.; Kemner, Kenneth M.; Lin, Xueju; Kennedy, David W.; Bjornstad, Bruce N.; Konopka, Allan; Moore, Dean A.; Resch, Charles T.; Phillips, Jerry L.

    2012-04-14

    The microbial reduction of Fe(III) and U(VI) were investigated in shallow aquifer sediments collected from subsurface Pleistocene flood deposits near the Hanford Reach of the Columbia River in Washington State. Increases in 0.5 N HCl-extractable Fe(II) were observed in incubated sediments and 57Fe Mssbauer spectroscopy revealed that Fe(III) associated with phyllosilicates and pyroxene was reduced to Fe(II). Aqueous uranium(VI) concentrations decreased in incubated Hanford sediments with the rate and extent being greater in sediment amended with organic carbon. X-ray absorption spectroscopy of bioreduced sediments indicated that 67-77% of the U signal was U(VI), probably as an adsorbed species associated with a new or modified reactive mineral phase. Phylotypes within the Deltaproteobacteria were more common in Hanford sediments incubated with U(VI) than without and in U(VI)-free incubations, members of the Clostridiales were dominant with sulfate-reducing phylotypes more common in the sulfate-amended sediments. These results demonstrate the potential for anaerobic reduction phyllosilicate Fe(III) and sulfate in Hanford unconfined aquifer sediments and biotransformations involving reduction and adsorption leading to decreased aqueous U concentrations.

  20. Dopant spin states and magnetism of Sn{sub 1?x}Fe{sub x}O{sub 2} nanoparticles

    SciTech Connect (OSTI)

    Punnoose, A. Dodge, Kelsey; Reddy, K. M.; Franco, Nevil; Chess, Jordan; Eixenberger, Josh; Beltrn, J. J.; Barrero, C. A.

    2014-05-07

    This work reports detailed investigations of a series of ?2.6?nm sized, Sn{sub 1?x}Fe{sub x}O{sub 2} crystallites with x?=?00.10 using Mossbauer spectroscopy, x-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance spectroscopy (EPR), and magnetometry to determine the oxidation state of Fe dopants and their role in the observed magnetic properties. The magnetic moment per Fe ion ? was the largest ?6.48??10{sup ?3} ?{sub B} for the sample with the lowest (0.001%) Fe doping, and it showed a rapid downward trend with increasing Fe doping. Majority of the Fe ions are in 3+ oxidation state occupying octahedral sites. Another significant fraction of Fe dopant ions is in 4+ oxidation state and a still smaller fraction might be existing as Fe{sup 2+} ions, both occupying distorted sites, presumably in the surface regions of the nanocrystals, near oxygen vacancies. These studies also suggest that the observed magnetism is not due to exchange coupling between Fe{sup 3+} spins. A more probable role for the multi-valent Fe ions may be to act as charge reservoirs, leading to charge transfer ferromagnetism.

  1. Interplay between out-of-plane anisotropic L1{sub 1}-type CoPt and in-plane anisotropic NiFe layers in CoPt/NiFe exchange springs

    SciTech Connect (OSTI)

    Saravanan, P.; Hsu, Jen-Hwa Tsai, C. L.; Tsai, C. Y.; Lin, Y. H.; Kuo, C. Y.; Wu, J.-C.; Lee, C.-M.

    2014-06-28

    Films of L1{sub 1}-type CoPt/NiFe exchange springs were grown with different NiFe (Permalloy) layer thickness (t{sub NiFe} = 0–10 nm). X-ray diffraction analysis reveals that the characteristic peak position of NiFe(111) is not affected by the CoPt-layer—confirming the absence of any inter-diffusion between the CoPt and NiFe layers. Magnetic studies indicate that the magnetization orientation of NiFe layer can be tuned through varying t{sub NiFe} and the perpendicular magnetic anisotropy of L1{sub 1}-type CoPt/NiFe films cannot sustain for t{sub NiFe} larger than 3.0 nm due to the existence of exchange interaction at the interface of L1{sub 1}-CoPt and NiFe layers. Magnetic force microscopy analysis on the as-grown samples shows the changes in morphology from maze-like domains with good contrast to hazy domains when t{sub NiFe} ≥ 3.0 nm. The three-dimensional micro-magnetic simulation results demonstrate that the magnetization orientation in NiFe layer is not uniform, which continuously increases from the interface to the top of NiFe layer. Furthermore, the tilt angle of the topmost NiFe layers can be changed over a very wide range from a small number to about 75° by varying t{sub NiFe} from 1 to 10 nm. It is worth noting that there is an abrupt change in the magnetization direction at the interface, for all the t{sub NiFe} investigated. The results of present study demonstrate that the tunable tilted exchange springs can be realized with L1{sub 1}-type CoPt/NiFe bilayers for future applications in three-axis magnetic sensors or advanced spintronic devices demanding inclined magnetic anisotropy.

  2. Transition to collapsed tetragonal phase in CaFe2As2 single crystals as seen by 57Fe Mössbauer spectroscopy

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bud'ko, Sergey L.; Ma, Xiaoming; Tomić, Milan; Ran, Sheng; Valentí, Roser; Canfield, Paul C.

    2016-01-21

    Temperature dependent measurements of 57Fe Mössbauer spectra on CaFe2As2 single crystals in the tetragonal and collapsed tetragonal phases are reported. Clear features in the temperature dependencies of the isomer shift, relative spectra area, and quadrupole splitting are observed at the transition from the tetragonal to the collapsed tetragonal phase. From the temperature dependent isomer shift and spectral area data, an average stiffening of the phonon modes in the collapsed tetragonal phase is inferred. The quadrupole splitting increases by ~25% on cooling from room temperature to ~100 K in the tetragonal phase and is only weakly temperature dependent at low temperaturesmore » in the collapsed tetragonal phase, in agreement with the anisotropic thermal expansion in this material. In order to gain microscopic insight about these measurements, we perform ab initio density functional theory calculations of the electric field gradient and the electron density of CaFe2As2 in both phases. By comparing the experimental data with the calculations we are able to fully characterize the crystal structure of the samples in the collapsed-tetragonal phase through determination of the As z coordinate. Furthermore, based on the obtained temperature dependent structural data we are able to propose charge saturation of the Fe-As bond region as the mechanism behind the stabilization of the collapsed-tetragonal phase at ambient pressure.« less

  3. Proceedings of the joint contractors meeting: FE/EE Advanced Turbine Systems conference FE fuel cells and coal-fired heat engines conference

    SciTech Connect (OSTI)

    Geiling, D.W.

    1993-08-01

    The joint contractors meeting: FE/EE Advanced Turbine Systems conference FEE fuel cells and coal-fired heat engines conference; was sponsored by the US Department of Energy Office of Fossil Energy and held at the Morgantown Energy Technology Center, P.O. Box 880, Morgantown, West Virginia 26507-0880, August 3--5, 1993. Individual papers have been entered separately.

  4. Role of chalcogen vapor annealing in inducing bulk superconductivity in Fe1+yTe1-xSex [How does annealing in chalcogen vapor induce superconductivity in Fe1+yTe-xSex?

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lin, Wenzhi; Ganesh, P.; Gianfrancesco, Anthony; Wang, Jun; Berlijn, Tom; Maier, Thomas A.; Kalinin, Sergei V.; Sales, Brian C.; Pan, Minghu

    2015-02-01

    Recent investigations have shown that Fe1+yTe1-xSex can be made superconducting by annealing it in Se and O vapors. The current lore is that these chalcogen vapors induce superconductivity by removing the magnetic excess Fe atoms. To investigate this phenomenon we performed a combination of magnetic susceptibility, specific heat and transport measurements together with scanning tunneling microscopy and spectroscopy and density functional theory calculations on Fe1+yTe1-xSex treated with Te vapor. We conclude that the main role of the Te vapor is to quench the magnetic moments of the excess Fe atoms by forming FeTem (m ≥ 1) complexes. We show thatmore » the remaining FeTem complexes are still damaging to the superconductivity and therefore that their removal potentially could further improve superconductive properties in these compounds.« less

  5. Observation of Precipitation Evolution in Fe-Ni-Mn-Ti-Al Maraging Steel using Atom Probe Tomography

    SciTech Connect (OSTI)

    Pereloma, E. V.; Stohr, R A; Miller, Michael K; Ringer, S. P.

    2009-01-01

    We describe the full decomposition sequence in an Fe-Ni-Mn-Ti-Al maraging steel during isothermal annealing at 550 C. Following significant pre-precipitation clustering reactions within the supersaturated martensitic solid solution, (Ni,Fe){sub 3}Ti and (Ni,Fe){sub 3}(Al,Mn) precipitates eventually form after isothermal aging for {approx}60 seconds. The morphology of the (Ni,Fe){sub 3}Ti particles changes gradually during aging from predominantly plate-like to rod-like, and, importantly, Mn and Al were observed to segregate to these precipitate/matrix interfaces. The (Ni,Fe){sub 3}(Al,Mn) precipitates occurred at two main locations: uniformly within the matrix and at the periphery of the (Ni,Fe){sub 3}Ti particles. We relate this latter mode of precipitation to the Mn-Al segregation.

  6. Scanning Tunneling Microscopy and Theoretical Study of Water Adsorption on Fe3O4: Implications for Catalysis

    SciTech Connect (OSTI)

    Rim, Kwang T.; Eom, Daejin; Chan, Siu-Wai; Flytzani-Stephanopoulos, Maria; Flynn, George; Wen, Xiaodong; Batista, Enrique R.

    2012-10-23

    The reduced surface of a natural Hematite single crystal a-Fe2O3(0001) sample has multiple surface domains with di!erent terminations, Fe2O3(0001), FeO(111), and Fe3O4(111). The adsorption of water on this surface was investigated via Scanning Tunneling Microscopy (STM) and first-principle theoretical simulations. Water species are observed only on the Fe-terminated Fe3O4(111) surface at temperatures up to 235 K. Between 235 and 245 K we observed a change in the surface species from intact water molecules and hydroxyl groups bound to the surface to only hydroxyl groups atop the surface terminating FeIII cations. This indicates a low energy barrier for water dissociation on the surface of Fe3O4 that is supported by our theoretical computations. Our first principles simulations con"rm the identity of the surface species proposed from the STM images, finding that the most stable state of a water molecule is the dissociated one (OH + H), with OH atop surface terminating FeIII sites and H atop under-coordinated oxygen sites. Attempts to simulate reaction of the surface OH with coadsorbed CO fail because the only binding sites for CO are the surface FeIII atoms, which are blocked by the much more strongly bound OH. In order to promote this reaction we simulated a surface decorated with gold atoms. The Au adatoms are found to cap the under-coordinated oxygen sites and dosed CO is found to bind to the Au adatom. This newly created binding site for CO not only allows for coexistence of CO and OH on the surface of Fe3O4 but also provides colocation between the two species. These two factors are likely promoters of catalytic activity on Au/Fe3O4(111) surfaces.

  7. Crystal structure and phase transition mechanisms in CsFe{sub 2}F{sub 6}

    SciTech Connect (OSTI)

    Molokeev, M.S.; Bogdanov, E.V.; Misyul, S.V.; Tressaud, A.; Flerov, I.N.

    2013-04-15

    For the first time, structural phase transitions induced by the temperature were found in A{sub x}M{sub x}{sup II}M{sub (1?x)}{sup III}F{sub 3} fluorides with the defect pyrochlore structure (Fd3{sup }m, Z=8). The room temperature structure of CsFe{sub 2}F{sub 6} was determined using X-ray powder diffraction technique. This phase was found to be ordered with the Pnma space group. The study of the temperature stability of orthorhombic structure by differential scanning calorimeter between 100 K and 700 K has shown a succession of phase transitions. The Pnma (Z=4)?Imma (Z=4)?I4{sub 1}/amd (Z=4)?Fd3{sup }m (Z=8) structural sequence was proposed to occur within a rather narrow temperature range 500560 K. The mechanism of structural transition has been mainly associated with the rotation of (MF{sub 6}) octahedra and small displacements of some Fe atoms. This assumption is in good agreement with the low experimental entropy value, which is characteristic for displacive transformations. - Graphical abstract: Mechanism of phase transition between the HT cubic form of CsFe{sub 2}F{sub 6} at 573 K (left) and the room temperature orthorhombic form at 298 K (right). The grey rectangles are clusters of five FeF{sub 6} octahedra. Highlights: ? Structural transition found for the first time in CsFe{sub 2}F{sub 6} with defect pyrochlore type. ? Fe{sup II} and Fe{sup III} atoms are ordered in room temperature Pnma form of CsFe{sub 2}F{sub 6}. ? Pnma(Z=4)?Imma(Z=4)?I4{sub 1}/amd(Z=4)?Fd-3m(Z=8) transition sequence is proposed. ? Structural transition due to rotation of MF{sub 6} groups+small displacements of Fe atoms. ? The low value of the entropy is in agreement with a displacive-type transition.

  8. Mesoporous Fe{sub 3}O{sub 4}/hydroxyapatite composite for targeted drug delivery

    SciTech Connect (OSTI)

    Gu, Lina; He, Xiaomei; Wu, Zhenyu

    2014-11-15

    Highlights: Mesoporous Fe{sub 3}O{sub 4}/hydroxyapatite composite was synthesized by a simple, efficient and environmental friendly method. The prepared material had a large surface area, high pore volume, and good magnetic separability. DOX-loaded Fe{sub 3}O{sub 4}/hydroxyapatite composite exhibited surprising slow drug release behavior and pH-dependent behavior. - Abstract: In this contribution, we introduced a simple, efficient, and green method of preparing a mesoporous Fe{sub 3}O{sub 4}/hydroxyapatite (HA) composite. The as-prepared material had a large surface area, high pore volume, and good magnetic separability, which made it suitable for targeted drug delivery systems. The chemotherapeutic agent doxorubicin (DOX) was used to investigate the drug release behavior of Fe{sub 3}O{sub 4}/HA composite. The drug release profiles displayed a little burst effect and pH-dependent behavior. The release rate of DOX at pH 5.8 was larger than that at pH 7.4, which could be attributed to DOX protonation in acid medium. In addition, the released DOX concentrations remained at 0.83 and 1.39 ?g/ml at pH 7.4 and 5.8, respectively, which indicated slow, steady, and safe release rates. Therefore, the as-prepared Fe{sub 3}O{sub 4}/hydroxyapatite composite could be an efficient platform for targeted anticancer drug delivery.

  9. Flux growth and magnetic properties of FeVO{sub 4} single crystals

    SciTech Connect (OSTI)

    He Zhangzhen Yamaura, Jun-Ichi; Ueda, Yutaka

    2008-09-15

    FeVO{sub 4} (I) single crystals are grown by the flux method using V{sub 2}O{sub 5} as the self-flux. The grown crystals exhibit a characteristic morphology with natural facets. The quality of the crystals is confirmed by X-ray diffraction and EPMA techniques. Magnetic properties are investigated by means of magnetic susceptibility, magnetization, and heat capacity measurements. Two magnetic phase transitions are observed at {approx}13 and {approx}20 K. Such unusual magnetic behaviors are suggested to originate from two different Fe ligand environments of octahedral FeO{sub 6} and trigonal bipyramidal FeO{sub 5} in a six-column doubly bent chain. - Graphical abstract: FeVO{sub 4} (I) single crystals are grown by the flux method using V{sub 2}O{sub 5} as the self-flux. Magnetic properties are investigated by means of magnetic susceptibility, magnetization, and heat capacity measurements, showing two magnetic phase transitions at {approx}13 and {approx}20 K.

  10. Synthesis and Characterization of Photocatalytic TiO 2 -ZnFe 2 O 4 Nanoparticles

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Srinivasan, Sesha S.; Wade, Jeremy; Stefanakos, Elias K.

    2006-01-01

    A new coprecipimore » tation/hydrolysis synthesis route is used to create a TiO 2 -ZnFe 2 O 4 nanocomposite that is directed towards extending the photoresponse of TiO 2 from UV to visible wavelengths ( > 400   nm ). The effect of TiO 2 's accelerated anatase-rutile phase transformation due to the presence of the coupled ZnFe 2 O 4 narrow-bandgap semiconductor is evaluated. The transformation's dependence on pH, calcinations temperature, particle size, and ZnFe 2 O 4 concentration has been analyzed using XRD, SEM, and UV-visible spectrometry. The requirements for retaining the highly photoactive anatase phase present in a ZnFe 2 O 4 nanocomposite are outlined. The visible-light-activated photocatalytic activity of the TiO 2 -ZnFe 2 O 4 nanocomposites has been compared to an Aldrich TiO 2 reference catalyst, using a solar-simulated photoreactor for the degradation of phenol.« less

  11. Prediction of magnetic moment collapse in ZrFe{sub 2} under hydrostatic pressure

    SciTech Connect (OSTI)

    Zhang, Wenxu; Zhang, Wanli

    2015-04-28

    Electronic structure and magnetic properties of ZrFe{sub 2} in the cubic Laves phase are investigated by calculations based on density functional theory. The magnetic moment decreases with the increase of the hydrostatic pressure in an unusual way: Two-step magnetic collapse is predicted. The first one is a continuous change from 1.53??{sub B}/Fe to 0.63??{sub B}/Fe at about 3.6?GPa, and the other is from 0.25??{sub B}/Fe to the nonmagnetic state at about 15?GPa in a first order manner under the local spin density approximation of the exchange correlation potential. A metastable state with intermediate spin moment about 0.15??{sub B}/Fe may exist before that. We understand this process by the changes of density of states during it. The magnetic moment decreases under the pressure in the vicinity of the experimental lattice constant with dlnm/dp=?0.038 GPa{sup ?1}. The spontaneous volume magnetostriction is 3.6%, which is huge enough to find potential applications in magnetostriction actuators and sensors. We suggest that the Invar effect of this compound may be understood when considering the magnetic moment variation according to the magnetostrictive model of Invar.

  12. Superparamagnetic behavior of Fe-doped SnO{sub 2} nanoparticles

    SciTech Connect (OSTI)

    Hachisu, M.; Onuma, K.; Kondo, T.; Miike, K.; Miyasaka, T.; Mori, K.; Ichiyanagi, Y.

    2014-02-20

    SnO{sub 2} is an n-type semiconductor with a wide band gap of 3.62 eV, and SnO{sub 2} nanoparticles doped with magnetic ions are expected to realized new diluted magnetic semiconductors (DMSs). Realizing ferromagnetism at room temperature is important for spintronics device applications, and it is interesting that the magnetic properties of these DMS systems can be varied significantly by modifying the preparation methods or conditions. In this study, the magnetic properties of Fe-doped (3% and 5%) SnO{sub 2} nanoparticles, prepared using our novel chemical preparation method and encapsulated in amorphous SiO{sub 2}, were investigated. The particle size (1.8–16.9 nm) and crystal phase were controlled by the annealing temperature. X-ray diffraction confirmed a rutile SnO{sub 2} single-phase structure for samples annealed at 1073–1373 K, and the composition was confirmed using X-ray fluorescence analysis. SQUID magnetometer measurements revealed superparamagnetic behavior of the 5%-Fe-doped sample at room temperature, although SnO{sub 2} is known to be diamagnetic. Magnetization curves at 5 K indicated that the 3%-Fe-doped has a larger magnetization than that of the 5%-Fe-doped sample. We conclude that the magnetization of the 5%-Fe-doped sample decreased at 5 K due to the superexchange interaction between the antiferromagnetic coupling in the nanoparticle system.

  13. Stability of uranium incorporated into Fe(hydr)oxides under fluctuating redox conditions

    SciTech Connect (OSTI)

    Stewart, B.D.; Nico, P.S.; Fendorf, S.

    2009-04-01

    Reaction pathways resulting in uranium bearing solids that are stable (i.e., having limited solubility) under both aerobic and anaerobic conditions will limit dissolved concentrations and migration of this toxin. Here we examine the sorption mechanism and propensity for release of uranium reacted with Fe (hydr)oxides under cyclic oxidizing and reducing conditions. Upon reaction of ferrihydrite with Fe(II) under conditions where aqueous Ca-UO{sub 2}-CO{sub 3} species predominate (3 mM Ca and 3.8 mM CO{sub 3}-total), dissolved uranium concentrations decrease from 0.16 mM to below detection limit (BDL) after 5 to 15 d, depending on the Fe(II) concentration. In systems undergoing 3 successive redox cycles (15 d of reduction followed by 5 d of oxidation) and a pulsed decrease to 0.15 mM CO{sub 3}-total, dissolved uranium concentrations varied depending on the Fe(II) concentration during the initial and subsequent reduction phases - U concentrations resulting during the oxic 'rebound' varied inversely with the Fe(II) concentration during the reduction cycle. Uranium removed from solution remains in the oxidized form and is found both adsorbed on and incorporated into the structure of newly formed goethite and magnetite. Our 15 results reveal that the fate of uranium is dependent on anaerobic/aerobic conditions, aqueous uranium speciation, and the fate of iron.

  14. Synthesis and Characterization of PhotocatalyticTiO2-ZnFe2O4Nanoparticles

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Srinivasan, Sesha S.; Wade, Jeremy; Stefanakos, Elias K.

    2006-01-01

    A new coprecipitation/hydrolysis synthesis route is used to create aTiO2-ZnFe2O4nanocomposite that is directed towards extending the photoresponse ofTiO2from UV to visible wavelengths (>400?nm). The effect ofTiO2's accelerated anatase-rutile phase transformation due to the presence of the coupledZnFe2O4narrow-bandgap semiconductor is evaluated. The transformation's dependence on pH, calcinations temperature, particle size, andZnFe2O4concentration has been analyzed using XRD, SEM, and UV-visible spectrometry. The requirements for retaining the highly photoactive anatase phase present in aZnFe2O4nanocomposite are outlined. The visible-light-activated photocatalytic activity of theTiO2-ZnFe2O4nanocomposites has been compared to an AldrichTiO2reference catalyst, using a solar-simulated photoreactor formorethe degradation of phenol.less

  15. Stress-induced large Curie temperature enhancement in Fe(sub 64)Ni(sub 36) Invar alloy.

    SciTech Connect (OSTI)

    Gorria, P.; Martinez-Blanco, D.; Perez, M. J.; Blanco, J. A.; Hernando, A.; Laguna-Marco, M. A.; Haskel, D.; Souza-Neto, N. M.; Xmith, R. I.; Marshall, W. G.; Garbarino, G.; Mezouar, M.; Fernandez-Martinez, A.; Chaboy, J.; Fernandez Barquin, L.; Rodriguez Castrillon, J. A.; Moldovan, M.; Garcia Alonso, J. I.; Zhang, J.; Llobet, A.; Jiang, J. S.; Univ. de Oviedo; Inst. de Magnetismo Aplicado; ISIS Facility; ESRF; Univ.Grenoble and CNRS; CSIC-Univ. de Zaragoza; Univ. de Cantabria; LANL

    2009-01-01

    We have succeeded in increasing up to 150 K the Curie temperature in the Fe{sub 64}N{sub 36}6 invar alloy by means of a severe mechanical treatment followed by a heating up to 1073 K. The invar behavior is still present as revealed by the combination of magnetic measurements with neutron and x-ray techniques under extreme conditions, such as high temperature and high pressure. The proposed explanation is based in a selective induced microstrain around the Fe atoms, which causes a slight increase in the Fe-Fe interatomic distances, thus reinforcing ferromagnetic interactions due to the strong magnetoelastic coupling in these invar compounds.

  16. Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film

    SciTech Connect (OSTI)

    Di, Kai; Zhang, Vanessa Li; Lim, Hock Siah; Ng, Ser Choon; Kuok, Meng Hau; Qiu, Xuepeng; Yang, Hyunsoo

    2015-02-02

    Employing Brillouin spectroscopy, strong interfacial Dzyaloshinskii-Moriya interactions have been observed in an ultrathin Pt/CoFeB film. Our micromagnetic simulations show that spin-wave nonreciprocity due to asymmetric surface pinning is insignificant for the 0.8 nm-thick CoFeB film studied. The observed high asymmetry of the monotonic spin wave dispersion relation is thus ascribed to strong Dzyaloshinskii-Moriya interactions present at the Pt/CoFeB interface. Our findings should further enhance the significance of CoFeB as an important material for magnonic and spintronic applications.

  17. Understanding the solidification and microstructure evolution during CSC-MIG welding of FeCrB-based alloy

    SciTech Connect (OSTI)

    Sorour, A.A. Chromik, R.R. Gauvin, R. Jung, I.-H. Brochu, M.

    2013-12-15

    The present is a study of the solidification and microstructure of Fe28.2%Cr3.8%B1.5%Si1.5%Mn (wt.%) alloy deposited onto a 1020 plain carbon steel substrate using the controlled short-circuit metal inert gas welding process. The as-solidified alloy was a metal matrix composite with a hypereutectic microstructure. Thermodynamic calculation based on the ScheilGulliver model showed that a primary (Cr,Fe){sub 2}B phase formed first during solidification, followed by an eutectic formation of the (Cr,Fe){sub 2}B phase and a body-centered cubic Fe-based solid solution matrix, which contained Cr, Mn and Si. Microstructure analysis confirmed the formation of these phases and showed that the shape of the (Cr,Fe){sub 2}B phase was irregular plate. As the welding heat input increased, the weld dilution increased and thus the volume fraction of the (Cr,Fe){sub 2}B plates decreased while other microstructural characteristics were similar. - Highlights: We deposit FeCrB-based alloy onto plain carbon steel using the CSC-MIG process. We model the solidification behavior using thermodynamic calculation. As deposited alloy consists of (Cr,Fe){sub 2}B plates embedded in Fe-based matrix. We study the effect of the welding heat input on the microstructure.

  18. Preparation and structural characterization of FeCo epitaxial thin films on insulating single-crystal substrates

    SciTech Connect (OSTI)

    Nishiyama, Tsutomu; Ohtake, Mitsuru; Futamoto, Masaaki; Kirino, Fumiyoshi

    2010-05-15

    FeCo epitaxial films were prepared on MgO(111), SrTiO{sub 3}(111), and Al{sub 2}O{sub 3}(0001) single-crystal substrates by ultrahigh vacuum molecular beam epitaxy. The effects of insulating substrate material on the film growth process and the structures were investigated. FeCo(110){sub bcc} films grow on MgO substrates with two type domains, Nishiyama-Wassermann (NW) and Kurdjumov-Sachs (KS) relationships. On the contrary, FeCo films grown on SrTiO{sub 3} and Al{sub 2}O{sub 3} substrates include FeCo(111){sub bcc} crystal in addition to the FeCo(110){sub bcc} crystals with NW and KS relationships. The FeCo(111){sub bcc} crystal consists of two type domains whose orientations are rotated around the film normal by 180 deg. each other. The out-of-plane and the in-plane lattice spacings of FeCo(110){sub bcc} and FeCo(111){sub bcc} crystals formed on the insulating substrates are in agreement with those of the bulk Fe{sub 50}Co{sub 50} (at. %) crystal with small errors ranging between +0.2% and +0.4%, showing that the strains in the epitaxial films are very small.

  19. SEMI-ANNUAL REPORTS FOR JORDAN COVE LNG L.P. - FE DKT. NO. 13-141-LNG -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORDER 3412 | Department of Energy JORDAN COVE LNG L.P. - FE DKT. NO. 13-141-LNG - ORDER 3412 SEMI-ANNUAL REPORTS FOR JORDAN COVE LNG L.P. - FE DKT. NO. 13-141-LNG - ORDER 3412 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 More Documents & Publications SEMI-ANNUAL REPORTS FOR JORDAN COVE ENERGY PROJECT, L.P. - FE DKT. NO. 11-127-LNG - ORDER 3041 SEMI-ANNUAL REPORTS FOR JORDAN COVE ENERGY FE DKT. NO. 12-32-LNG - ORDER 3413 ORDER NO. 3413: Jordan Cove LNG

  20. Experimental study of the beta-delayed proton precursors /sup 33/Ar and /sup 49/Fe

    SciTech Connect (OSTI)

    XU Xiao-ji; GUO Jun-sheng; GUO Ying-xiang; ZHAO Zhi-zheng; LUO Yi-xiao

    1985-01-01

    Beta-delayed proton precursors /sup 33/Ar and /sup 49/Fe have been produced via the (/sup 12/C,3n) reaction in 65-MeV carbon bombardments of /sup 24/Mg and /sup 40/Ca, respectively. The major proton peaks are at 3.28 +- 0.07 MeV for /sup 33/Ar and 1.98 +- 0.04 MeV for /sup 49/Fe. The corresponding cross section for /sup 33/Ar is 0.40 +- 0.08 ..mu..b, and for /sup 49/Fe 0.70 +- 0.14 ..mu..b. The half-life of /sup 33/Ar was determined to be 167 +- 24 ms.