Sample records for ukraine ce sri

  1. Astronomy in Ukraine

    E-Print Network [OSTI]

    Ya. V. Pavlenko; I. B. Vavilova; T. Kostiuk

    2005-12-16T23:59:59.000Z

    The current and prospective status of astronomical research in Ukraine is discussed. A brief history of astronomical research in Ukraine is presented and the system organizing scientific activity is described, including astronomy education, institutions and staff, awarding higher degrees/titles, government involvement, budgetary investments and international cooperation. Individuals contributing significantly to the field of astronomy and their accomplishments are mentioned. Major astronomical facilities, their capabilities, and their instrumentation are described. In terms of the number of institutions and personnel engaged in astronomy, and of past accomplishments, Ukraine ranks among major nations of Europe. Current difficulties associated with political, economic and technological changes are addressed and goals for future research activities presented.

  2. United States and Ukraine Sign Agreement to Improve Security...

    Office of Environmental Management (EM)

    Ukraine Sign Agreement to Improve Security of Ukraine's Radioactive Materials United States and Ukraine Sign Agreement to Improve Security of Ukraine's Radioactive Materials May...

  3. Sri Ganapathi Ragam: Sowrastram

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    ; dNd | P ; ; P M-DPM gmPmg R R ; R ; || sri - ga na pa- - - -- thi- ni - - - -- - se ­ vim-pa ra--- - - - thi ni - - - - - se- vim-pa ra- - - - - - -- - - -- - - R ; -S R S ; R ; GMPM P, n d N d | P ; ; P M- D P M gmpd nsrs sndp mgrs || R ; re Sri tha ma- -- na ­vu- la- - ra - - - - - se- - vim-pa ra

  4. Ukraine HEU Removal | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Plan Ukraine HEU Removal Ukraine HEU Removal Location Ukraine United States 50 12' 24.8688" N, 25 50' 23.4384" E See map: Google Maps Javascript is required to view this map...

  5. Ukraine Steam Partnership

    SciTech Connect (OSTI)

    Gurvinder Singh

    2000-02-15T23:59:59.000Z

    The Ukraine Steam Partnership program is designed to implement energy efficiency improvements in industrial steam systems. These improvements are to be made by the private plants and local government departments responsible for generation and delivery of energy to end-users. One of the activities planned under this program was to provide a two-day training workshop on industrial steam systems focusing on energy efficiency issues related to the generation, distribution, and consumption of steam. The workshop was geared towards plant managers, who are not only technically oriented, but are also key decision makers in their respective companies. The Agency for Rational Energy Use and Ecology (ARENA-ECO), a non-governmental, not-for-profit organization founded to promote energy efficiency and environmental protection in Ukraine, in conjunction with the Alliance staff in Kiev sent out invitations to potential participants in all the regions of Ukraine. The purpose of this report is the describe the proceedings from the workshop and provide recommendations from the workshop's roundtable discussion. The workshop was broken down into two main areas: (1) Energy efficient boiler house steam generation; and Energy efficient steam distribution and consumption. The workshop also covered the following topics: (1) Ukrainian boilers; (2) Water treatment systems; (3) A profile of UKRESCO (Ukrainian Energy Services Company); (4) Turbine expanders and electricity generation; (5) Enterprise energy audit basics; and (6) Experience of steam use in Donetsk oblast.

  6. Exile vs. Exodus: Nationalism and Gendered Migration from Ukraine to Italy and California

    E-Print Network [OSTI]

    Solari, Cinzia

    2010-01-01T23:59:59.000Z

    by Russian president Vladimir Putin and Ukraines incumbentAs recently as April 2008, Putin described Ukraine as an

  7. SRI2007 Conference - Poster Download

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln n51964780620999 SRI

  8. Bridgman Growth of Large SrI2:Eu2+ Single Crystals: A High-performance Scintillator for Radiation Detection Applications

    SciTech Connect (OSTI)

    Boatner, Lynn A [ORNL; Ramey, Joanne Oxendine [ORNL; Kolopus, James A [ORNL; Hawrami, Rastgo [Radiation Monitoring Devices, Watertown, MA; Higgins, William [Radiation Monitoring Devices, Watertown, MA; Van Loef, Edgar [Radiation Monitoring Devices, Watertown, MA; Glodo, J. [Radiation Monitoring Devices, Watertown, MA; Shah, Kanai [Radiation Monitoring Devices, Watertown, MA; Bhattacharya, P. [Fisk University, Nashville, TN; Tupitsyn, E [Fisk University, Nashville, TN; Groza, Michael [Fisk University, Nashville, TN; Burger, Arnold [Fisk University, Nashville, TN

    2013-01-01T23:59:59.000Z

    Single-crystal strontium iodide (SrI2) doped with relatively high levels (e.g., 3 - 6 %) of Eu2+ exhibits characteristics that make this material superior, in a number of respects, to other scintillators that are currently used for radiation detection. Specifically, SrI2:Eu2+ has a light yield that is significantly higher than LaBr3:Ce3+ -a currently employed commercial high-performance scintillator. Additionally, SrI2:Eu2+ is characterized by an energy resolution as high as 2.6% at the 137Cs gamma-ray energy of 662 keV, and there is no radioactive component in SrI2:Eu2+ - unlike LaBr3:Ce3+ that contains 138La. The Ce3+-doped LaBr3 decay time is, however, faster (30 nsec) than the 1.2 sec decay time of SrI2:Eu2+. Due to the relatively low melting point of strontium iodide (~515 oC), crystal growth can be carried out in quartz crucibles by the vertical Bridgman technique. Materials-processing and crystal-growth techniques that are specific to the Bridgman growth of europium-doped strontium iodide scintillators are described here. These techniques include the use of a porous quartz frit to physically filter the molten salt from a quartz antechamber into the Bridgman growth crucible and the use of a bent or bulb grain selector design to suppress multiple grain growth. Single crystals of SrI2:Eu2+ scintillators with good optical quality and scintillation characteristics have been grown in sizes up to 5.0 cm in diameter by applying these techniques. Other aspects of the SrI2:Eu2+ crystal-growth methods and of the still unresolved crystal-growth issues are described here.

  9. Update on CMM/CBM development activity in Ukraine

    SciTech Connect (OSTI)

    NONE

    2007-01-15T23:59:59.000Z

    Current coal mine methane (CMM) and coalbed methane (CBM) development efforts in Ukraine are reviewed. These include the Donetsk CMM/CBM project and the Ukraine Methane Group CMM project (15 MW power production). 4 figs.

  10. SRI International Discovery of Photocatalysts for

    E-Print Network [OSTI]

    SRI International Discovery of Photocatalysts for Hydrogen Production 2003 DOE Hydrogen Review May for 2005 and 2010 involve sequential order of magnitude improvements in durability and modest improvements screening tools being developed in this project. Furthermore, the inclusion of a partner with the means

  11. Democracy and Economic Demands in Russia and Ukraine: Lessons for Democratic Theory

    E-Print Network [OSTI]

    Shulga, Mayia

    2012-01-01T23:59:59.000Z

    1994. Political Values in Russia, Ukraine and Lithuania:Christensen, Paul T. 1999. Russias Workers in Transition:Democratisation: Evidence from Russia and Ukraine, Europe-

  12. IPT SRI Cogeneration Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Power BasicsGermany:Information IDS Climate Change andSmartIPT SRI

  13. adult sri lankan: Topics by E-print Network

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

    Edinburgh, University of - Research Archive Summary: The thesis explores the role and impact of the internet on Sri Lankan Tamil diaspora political activism, focusing on both...

  14. Sri Lanka: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-g GrantAtlas (PACA RegionSpringview II Wind ProjectSri Lanka: Energy

  15. Industrial Energy Efficiency in Ukraine: The Business Outlook

    E-Print Network [OSTI]

    Evans, M.

    Ukraine is full of profitable opportunities for energy efficiency. Industry accounts for many of these opportunities because of its high level of energy consumption and its ability to pay for energy efficiency measures in hard currency. This paper...

  16. Urban Decontamination Experience at Pripyat Ukraine - 13526

    SciTech Connect (OSTI)

    Paskevych, Sergiy [Institute for Safety Problems of Nuclear Power Plants, National Academy of Sciences of Ukraine, 36 a Kirova str. Chornobyl, Kiev region, 07200 (Ukraine)] [Institute for Safety Problems of Nuclear Power Plants, National Academy of Sciences of Ukraine, 36 a Kirova str. Chornobyl, Kiev region, 07200 (Ukraine); Voropay, Dmitry [Federal State Unitary Enterprise 'Russian State Center of Inventory and Registration and Real Estate - Federal Bureau of Technical Inventory', 37-2 Bernadsky Prospekt, Moscow Russia 119415 (Russian Federation)] [Federal State Unitary Enterprise 'Russian State Center of Inventory and Registration and Real Estate - Federal Bureau of Technical Inventory', 37-2 Bernadsky Prospekt, Moscow Russia 119415 (Russian Federation); Schmieman, Eric [Battelle Memorial Institute, PO Box 999 MSIN K6-90, Richland, WA 99352 (United States)] [Battelle Memorial Institute, PO Box 999 MSIN K6-90, Richland, WA 99352 (United States)

    2013-07-01T23:59:59.000Z

    This paper describes the efficiency of radioactive decontamination activities of the urban landscape in the town of Pripyat, Ukraine. Different methods of treatment for various urban infrastructure and different radioactive contaminants are assessed. Long term changes in the radiation condition of decontaminated urban landscapes are evaluated: 1. Decontamination of the urban system requires the simultaneous application of multiple methods including mechanical, chemical, and biological. 2. If a large area has been contaminated, decontamination of local areas of a temporary nature. Over time, there is a repeated contamination of these sites due to wind transport from neighboring areas. 3. Involvement of earth-moving equipment and removal of top soil by industrial method achieves 20-fold reduction in the level of contamination by radioactive substances, but it leads to large amounts of waste (up to 1500 tons per hectare), and leads to the re-contamination of treated areas due to scatter when loading, transport pollutants on the wheels of vehicles, etc.. (authors)

  17. Incentives for Methane Mitigation and Energy-Efficiency Improvements in Case of Ukraines Natural Gas Transmission System

    SciTech Connect (OSTI)

    Roshchanka, Volha; Evans, Meredydd

    2014-06-01T23:59:59.000Z

    Reducing methane losses is a concern for climate change policy and energy policy. The energy sector is the major source of methane emissions into the atmosphere. Reducing methane emissions and avoiding combustion can be very cost-effective, but various barriers prevent such energy-efficiency measures from taking place. To date, few examples of industry-wide improvements exist. One example of substantial investments into upgrading natural gas transmission system comes from Ukraine. The Ukrainian transmission company, Ukrtransgaz, reduced its own systems natural gas consumption by 68 percent in 2011 compared to the level in 2005. Evaluating reductions in methane emissions is challenging because of lack of accurate data and gaps in accounting methodologies. At the same time, Ukraines transmission system has undergone improvements that, at the very least, have contained methane emissions, if not substantially reduced them. In this paper, we describe recent developments in Ukraines natural gas transmission system and analyze the incentives that forced the sector to pay close attention to its methane losses. Ukraine is one of most energy-intensive countries, among the largest natural gas consumers in the world, and a significant emitter of methane. The country is also dependent on imports of natural gas. A combination of steep increases in the price of imported natural gas, and comprehensive domestic environmental and energy policies, regional integration policy, and international environmental agreements has created conditions for successful methane emission and combustion reductions. Learning about such case studies can help us design better policies elsewhere.

  18. The 2006 Russia-Ukraine Natural Gas Dispute: A mechanisms based approach.

    E-Print Network [OSTI]

    Daley, Stephen

    2009-01-01T23:59:59.000Z

    ??This thesis addresses the factors which lead the Russian government to increase natural gas prices for Ukraine in 2006. Through the use of methodological individualism, (more)

  19. Journal of Geological Society of Sri Lanka Vol. 15 (2013), 69-83 GEOTHERMAL ENERGY POTENTIAL IN SRI LANKA: A PRELIMINARY

    E-Print Network [OSTI]

    Jones, Alan G.

    Journal of Geological Society of Sri Lanka Vol. 15 (2013), 69-83 69 GEOTHERMAL ENERGY POTENTIAL faults or hot dry rock that would help geothermal energy development. Data show three regions, metamorphic terrains INTRODUCTION Geothermal energy development in Sri Lanka has been considered

  20. Radioactive contamination of SrI2(Eu) crystal scintillator

    E-Print Network [OSTI]

    Belli, P; Cerulli, R; Danevich, F A; Galenin, E; Gektin, A; Incicchitti, A; Isaienko, V; Kobychev, V V; Laubenstein, M; Nagorny, S S; Podviyanuk, R B; Tkachenko, S; Tretyak, V I

    2011-01-01T23:59:59.000Z

    A strontium iodide crystal doped by europium (SrI2(Eu)) was produced by using the Stockbarger growth technique. The crystal was subjected to characterisation that included relative photoelectron output and energy resolution for gamma quanta. The intrinsic radioactivity of SrI2(Eu) crystal scintillator was tested both in scintillation mode and by using ultra-low background HPGe gamma spectrometry deep underground. The response of the SrI2(Eu) detector to alpha particles (alpha/beta ratio and pulse shape) was estimated by analysing the 226Ra trace contamination internal to the crystal. We have found alpha/beta=0.55 and no difference in scintillation decay for alpha particles and gamma quanta. The application of the obtained results in the search for the double electron capture and electron capture with positron emission in 84Sr has been investigated at a level of sensitivity T_1/2 \\sim 10^15-10^16 yr. The results of these studies demonstrate the potentiality of this material for a variety of scintillation appli...

  1. Ukraine Fuel Removal: Fact Sheet | National Nuclear Security Administration

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered energy consumption by sectorlong version) The0 -ITER's centralNewUSUS0,Ukraine Fuel

  2. Hema Sri Power Projects Ltd HSPPL | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to: navigation,Ohio:Greer CountyCorridorPartImages Jump to: navigation,Entry JumpHema Sri

  3. Sri Balaji Biomass Power Pvt Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater, NewSri Balaji Biomass

  4. Sri Chamundeswari Sugars Limited SCSL | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater, NewSri Balaji

  5. Sri Gomathy Mills Pvt Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater, NewSri BalajiGomathy

  6. Sri Guru Prabha Power Pvt Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater, NewSri

  7. Sri Lanka Credit to Connect | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater, NewSriConnect Jump to:

  8. Sri Panchajanya Power Pvt Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater, NewSriConnect

  9. Sri Sai Manasa Nature Tech Pvt Limited | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater, NewSriConnectSai Manasa

  10. Sri Shadi Lal Enterprise Ltd SSLE | Open Energy Information

    Open Energy Info (EERE)

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  11. Energy Prices, Tariffs, Taxes and Subsidies in Ukraine

    SciTech Connect (OSTI)

    Evans, Meredydd

    2007-04-01T23:59:59.000Z

    For many years, electricity, gas and district heating tariffs for residential consumers were very low in Ukraine; until recently, they were even lower than in neighbouring countries such as Russia. The increases in gas and electricity tariffs, implemented in 2006, are an important step toward sustainable pricing levels; however, electricity and natural gas (especially for households) are still priced below the long-run marginal cost. The problem seems even more serious in district heating and nuclear power. According to the Ministry of Construction, district heating tariffs, on average, cover about 80% of costs. Current electricity prices do not fully include the capital costs of power stations, which are particularly high for nuclear power. Although the tariff for nuclear electricity generation includes a small decommissioning charge, it has not been sufficient to accumulate necessary funds for nuclear plants decommissioning.

  12. Revamp of Ukraine VCM plant will boost capacity, reduce emissions

    SciTech Connect (OSTI)

    NONE

    1996-05-13T23:59:59.000Z

    Oriana Concern (formerly P.O. Chlorvinyl) is revamping its 250,000 metric ton/year (mty) vinyl chloride monomer (VCM) plant at Kalusch, Ukraine. At the core of the project area new ethylene dichloride (EDC) cracking furnace and direct chlorination unit, and revamp of an oxychlorination unit to use oxygen rather than air. The plant expansion and modernization will boost capacity to 370,000 mty. New facilities for by-product recycling and recovery, waste water treatment, and emissions reduction will improve the plant`s environmental performance. This paper shows expected feedstock and utility consumption for VCM production. Techmashimport and P.O. Chlorvinyl commissioned the Kalusch plant in 1975. The plant was built by Uhde GmbH, Dortmund, Germany. The paper also provides a schematic of the Hoechst/Uhde VCM process being used for the plant revamp. The diagram is divided into processing sections.

  13. * Phys 222 may be substituted for Chem 178/178L ** CE 460 may be substituted for CE 333 or CE 334

    E-Print Network [OSTI]

    Lin, Zhiqun

    (Structural Analysis I) 3 CE 372 (Engr Hydro & Hydraulics) 3 CE 360 (Geotechnical Engineering) 3 CE 382 (Engr Hydro & Hydraulics) 3 CE 355 (Transportation Engr) 3 CE 382 (Design of Concretes) 3 CE 326 Design) 3 Numerical Analysis Elective 3 CE 485 (CE Design I) 2 Micro 201 (General Microbiology) 3 Engr

  14. The trouser under the cloth : Ceylon/Sri Lanka, personal space in the decolonization

    E-Print Network [OSTI]

    Pieris, Anoma D. (Anoma Darshani)

    1994-01-01T23:59:59.000Z

    This thesis examines the processes of decolonization in Ceylon/Sri Lanka, through the expressions of personal space surrounding the event of political independence. Personal space is understood as dress, manners, and ...

  15. Hygienic evaluation of radiation consequences after the Chernobyl accident in highly populated areas of Ukraine

    SciTech Connect (OSTI)

    Karachev, I.I.; Tkachenko, N.V.; Markelova, L.K. [Ukrainian State Medical Center of the Environmental Health, Kiev (Ukraine)

    1993-12-31T23:59:59.000Z

    This paper addresses radiation exposure to the people in the Ukraine as a result of the Chernobyl accident. As a result of this accident all Ukrainian regions have been heavily contaminated, even though the contamination density obtained in different regions are considerably different. Soils have become contaminated and plants grown in the soils transfer radionuclides to people.

  16. An Analysis of Grain Production Decline During the Early Transition in Ukraine: Bayesian Inference

    E-Print Network [OSTI]

    An Analysis of Grain Production Decline During the Early Transition in Ukraine: Bayesian Inference and pesticides (World Bank). The emergence of private opportunities resulted in labor and management migration in the sector. The ability of farms produce efficiently was also affected by the transition- related break

  17. Empowering Women: The Role of Economic Development, Political Culture and Institutional Design in the Worlds Societies

    E-Print Network [OSTI]

    Alexander, Amy C.

    2007-01-01T23:59:59.000Z

    Paraguay, Sri Lanka, Suriname, Thailand, Turkey, Ukraine,South Africa, Spain, Suriname, Sweden, Switzerland 25 th -75

  18. Paintball Countries

    E-Print Network [OSTI]

    Pilyugin, Sergei S.

    Korea Libya Niger Peru Oman Qatar Saudi Arabia Spain Sri Lanka Taiwan Thailand Turkey Ukraine UAE United

  19. Update: Proposed CE Curriculum & Program

    E-Print Network [OSTI]

    Jacob, Bruce

    Update: Proposed CE Curriculum & Program Bruce Jacob, End of Summer 2008 #12;What's all this, then, students, graduates · Held constituents' meeting over winter · Group vote this curriculum Barua has agreed to develop and teach the course ENEE 3xx (Digital systems) -- new course Bruce Jacob

  20. System of Rice Intensification (SRI) ISDA 2010, Montpellier, June 28-30, 2010 1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to distinctive benefit-cost ratio. The organic supplementation due to compost, green manure and weed incorporation, enhanced soil microbial activities and aeration, often uncounted, the use of solar energy OF RICE INTENSIFICATION (SRI) Economic and Ecological Benefits of Improved production practice for Food

  1. Abstracts of papers presented at SRI '95 Status of the Advanced Photon Source at Argonne National

    E-Print Network [OSTI]

    Abstracts of papers presented at SRI '95 Status of the Advanced Photon Source at Argonne National Laboratory David E. Moncton Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 Presented on 18 October 1995 The Advanced Photon Source at Argonne National Laboratory is a third

  2. Planet. Space Sri. Vol. 30, No. 8. pp.&g-854, 1982 Printed in Great Britain.

    E-Print Network [OSTI]

    Atreya, Sushil

    Planet. Space Sri. Vol. 30, No. 8. pp.&g-854, 1982 Printed in Great Britain. 0032-0533/82/08084946s, and the Lyman-alpha dayglow of Saturn when analyzed in conjunction with photochemical models of the hydrocarbons and energy budget, of the upper atmospheric composition and thermal structure of Jupiter (Atreya, Donahue

  3. Feasibility of an appliance energy testing and labeling program for Sri Lanka

    SciTech Connect (OSTI)

    Biermayer, Peter; Busch, John; Hakim, Sajid; Turiel, Issac; du Pont, Peter; Stone, Chris

    2000-04-01T23:59:59.000Z

    A feasibility study evaluated the costs and benefits of establishing a program for testing, labeling and setting minimum efficiency standards for appliances and lighting in Sri Lanka. The feasibility study included: refrigerators, air-conditioners, flourescent lighting (ballasts & CFls), ceiling fans, motors, and televisions.

  4. Colloques Nouvelles approches en risques ctiers COASTAL RISKS IN SRI LANKA GIS, SCENARIO AND MODELLING APPROACHES

    E-Print Network [OSTI]

    Boyer, Edmond

    AND MODELLING APPROACHES Manuel GARCIN1 , Jean François DESPRATS1 , Mélanie FONTAINE1 , Rodrigo PEDREROS1 , O.SEDAN their impacts. We present here a project funded by French Government (Ministère des Affaires Etrangères) and BRGM Research Division including both Sri Lankan and French institutions. The aims of this project

  5. College of Engineering CE Civil Engineering

    E-Print Network [OSTI]

    MacAdam, Keith

    College of Engineering CE Civil Engineering KEY: # = new course * = course changed = course.Lecture,twohours;laboratory,fourhoursperweek.Prereqorcoreq:MA113orconsentofinstructor. CE 120 INTRODUCTION TO CIVIL ENGINEERING. (1) An introduction to the civil engineering profession and the use of computer hardware and software in CE systems analysis and design

  6. U.S./Belarus/Ukraine joint research on the biomedical effects of the Chernobyl Reactor Accident. Final report

    SciTech Connect (OSTI)

    Bruce Wachholz

    2000-06-20T23:59:59.000Z

    The National Cancer Institute has negotiated with the governments of Belarus and Ukraine (Ministers/Ministries of Health, institutions and scientists) to develop scientific research protocols to study the effects of radioactive iodine released by the Chernobyl accident upon thyroid anatomy and function in defined cohorts of persons under the age of 19 years at the time of the accident. These studies include prospective long term medical follow-up of the cohort and the reconstruction of the radiation dose to each cohort subject's thyroid. The protocol for the study in Belarus was signed by the US and Belorussian governments in May 1994 and the protocol for the study in Ukraine was signed by the US and Ukraine in May 1995. A second scientific research protocol also was negotiated with Ukraine to study the feasibility of a long term study to follow the development of leukemia and lymphoma among Ukrainian cleanup workers; this protocol was signed by the US and Ukraine in October 1996.

  7. Assessment of the SRI Gasification Process for Syngas Generation with HTGR Integration -- White Paper

    SciTech Connect (OSTI)

    A.M. Gandrik

    2012-04-01T23:59:59.000Z

    This white paper is intended to compare the technical and economic feasibility of syngas generation using the SRI gasification process coupled to several high-temperature gas-cooled reactors (HTGRs) with more traditional HTGR-integrated syngas generation techniques, including: (1) Gasification with high-temperature steam electrolysis (HTSE); (2) Steam methane reforming (SMR); and (3) Gasification with SMR with and without CO2 sequestration.

  8. CE Geothermal | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBoston Areais3: Crystalline Rock - Basement JumpGeneral: CDOT Name: CE

  9. Using HOMER Software, NREL's Micropower Optimization Model, to Explore the Role of Gen-sets in Small Solar Power Systems; Case Study: Sri Lanka

    SciTech Connect (OSTI)

    Givler, T.; Lilienthal, P.

    2005-05-01T23:59:59.000Z

    This paper discusses using HOMER Software, NREL's Micropower Optimization Model, to explore the role of gen-sets in small solar power systems in Sri Lanka.

  10. International Refrigeration: Order (2012-CE-1510) | Department...

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

    Refrigeration: Order (2012-CE-1510) July 20, 2012 DOE ordered International Refrigeration Products to pay an 8,000 civil penalty after finding International Refrigeration had...

  11. Table 1. Connection of Criterion 8 CE Outcomes to CE Courses (required, design elective, advanced elective)

    E-Print Network [OSTI]

    Gelfond, Michael

    treatment Biological wastewater treatment (d) Proficiency in Water Resources Engineering CE 3305 CE 3354 CE systems Design of advance water treatment systems Design of biological wastewater treatment systems (g ENVE 4391 ENVE 4399 Water, wastewater, air, solid waste Physical and chemical treatment Advanced water

  12. Development and Testing of a High Capacity Plasma Chemical Reactor in the Ukraine

    SciTech Connect (OSTI)

    Reilly, Raymond W.

    2012-07-30T23:59:59.000Z

    This project, Development and Testing of a High Capacity Plasma Chemical Reactor in the Ukraine was established at the Kharkiv Institute of Physics and Technology (KIPT). The associated CRADA was established with Campbell Applied Physics (CAP) located in El Dorado Hills, California. This project extends an earlier project involving both CAP and KIPT conducted under a separate CRADA. The initial project developed the basic Plasma Chemical Reactor (PCR) for generation of ozone gas. This project built upon the technology developed in the first project, greatly enhancing the output of the PCR while also improving reliability and system control.

  13. Thermoelectric Couple Demonstration of (In, Ce)-based Skutterudite...

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

    Couple Demonstration of (In, Ce)-based Skutterudite Materials for Automotive Energy Recovery Thermoelectric Couple Demonstration of (In, Ce)-based Skutterudite Materials for...

  14. Lumiram Electric: Order (2010-CE-1014) | Department of Energy

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

    Lumiram Electric: Order (2010-CE-1014) Lumiram Electric: Order (2010-CE-1014) November 23, 2010 DOE issued an Order and entered into a Compromise Agreement with Lumiram Electric...

  15. Proceedings of Institute of Mathematics of NAS of Ukraine 2000, Vol. 30, Part 2, 341342. On -Wild Algebras

    E-Print Network [OSTI]

    Popovych, Roman

    Proceedings of Institute of Mathematics of NAS of Ukraine 2000, Vol. 30, Part 2, 341­342. On -Wild) be the group C-algebra. Definition (see [1]). We call a discrete group F -wild if there exist n N of -wild groups (other than the semi-direct products F G, where F is a wild group). Note that the group W

  16. Sri Lanka-Joint Programme on Resource Efficient and Cleaner Production

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater, NewSriConnect Jump

  17. ADVISER ROOM # EMAIL ADDRESS Adams 221 COBH (eda@ce.montana.edu)

    E-Print Network [OSTI]

    Dyer, Bill

    , Michael L. Adams Senior CE Betcher, Jacob M. Lewandowski Freshman CE Bigelow, Adam J. (F 11) Larsson Sophomore CE Deen, Michael Perkins Junior CE Devoe, Colleen L. (1st deg Arch) Larsson Sophomore CE #12;DeWitt

  18. Comparison of CeBr3 with LaBr3:Ce, LaCl3:Ce, and NaI:Tl Detectors

    SciTech Connect (OSTI)

    ,

    2010-09-01T23:59:59.000Z

    Energy resolution and detection efficiency were compared between two sizes of cerium bromide (CeBr3) scintillators, three sizes of lanthanum bromide (LaBr3:Ce) scintillators, three sizes of sodium iodide (NaI:Tl) scintillators, and a lanthanum chloride (LaCl3:Ce) scintillator. Comparisons are made of key parameters such as energy resolution, detection efficiency, linearity, and self-activity of CeBr3, LaBr3:Ce, LaCl3:Ce, and NaI:Tl scintillator detectors. The scintillator detectors are tested by comparing the peak separation and identification in the energy range up to 3.0 MeV using 133Ba, 152Eu, and naturally occurring radioactive materials [1]. The study has shown that CeBr3 scintillator detectors provided by Saint-Gobain offer better resolution than NaI:Tl scintillator detectors. CeBr3 detectors could resolve some closely spaced peaks from 133Ba and 152Eu, which NaI:Tl could not. LaBr3:Ce has slightly better resolution, and a slightly higher efficiency than CeBr3. In this work, self-activity of each of these four detector types was measured by operating the detectors themselves. A comparison of the intrinsic activity for all of the detectors in this study is demonstrated. For CeBr3, the self-activity present may be reduced, or even eliminated in the future, through improved processes for growing the material. It will be discussed if, and under what conditions, CeBr3 may be better than LaBr3:Ce and LaCl3:Ce for detection of certain special nuclear material ?-rays [2]. An overall advantage of CeBr3 detectors over lanthanum halide and NaI:Tl detectors will be discussed.

  19. SRI'99

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln n51964780620999 11th U.S.

  20. SRI2007

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORNRecovery ActR E Q U E N C Y T E C H

  1. Mirror mounts designed for the Advanced Photon Source SRI-CAT

    SciTech Connect (OSTI)

    Shu, D.; Benson, C.; Chang, J. [and others

    1997-09-01T23:59:59.000Z

    Use of a mirror for beamlines at third-generation synchrotron radiation facilities, such as the Advanced Photon Source (APS) at Argonne National laboratory, has many advantages. A mirror as a first optical component provides significant reduction in the beam peak heat flux and total power on the downstream monochromator and simplifies the bremsstrahlung shielding design for the beamline transport. It also allows one to have a system for multibeamline branching and switching. More generally, a mirror is used for beam focusing and/or low-pass filtering. Six different mirror mounts have been designed for the SRI-CAT beamlines. Four of them are designed as water-cooled mirrors for white or pink beam use, and the other two are for monochromatic beam use. Mirror mount designs, including vacuum vessel structure and precision supporting stages, are presented in this paper.

  2. Shielding analysis and design of the KIPT experimental neutron source facility of Ukraine.

    SciTech Connect (OSTI)

    Zhong, Z.; Gohar, M. Y. A.; Naberezhnev, D.; Duo, J.; Nuclear Engineering Division

    2008-10-31T23:59:59.000Z

    Argonne National Laboratory (ANL) of USA and Kharkov Institute of Physics and Technology (KIPT) of Ukraine have been collaborating on the conceptual design development of an experimental neutron source facility based on the use of an electron accelerator driven subcritical (ADS) facility [1]. The facility uses the existing electron accelerators of KIPT in Ukraine. The neutron source of the sub-critical assembly is generated from the interaction of 100 KW electron beam with a natural uranium target. The electron beam has a uniform spatial distribution and the electron energy in the range of 100 to 200 MeV, [2]. The main functions of the facility are the production of medical isotopes and the support of the Ukraine nuclear power industry. Reactor physics experiments and material performance characterization will also be carried out. The subcritical assembly is driven by neutrons generated by the electron beam interactions with the target material. A fraction of these neutrons has an energy above 50 MeV generated through the photo nuclear interactions. This neutron fraction is very small and it has an insignificant contribution to the subcritical assembly performance. However, these high energy neutrons are difficult to shield and they can be slowed down only through the inelastic scattering with heavy isotopes. Therefore the shielding design of this facility is more challenging relative to fission reactors. To attenuate these high energy neutrons, heavy metals (tungsten, iron, etc.) should be used. To reduce the construction cost, heavy concrete with 4.8 g/cm{sup 3} density is selected as a shielding material. The iron weight fraction in this concrete is about 0.6. The shape and thickness of the heavy concrete shield are defined to reduce the biological dose equivalent outside the shield to an acceptable level during operation. At the same time, special attention was give to reduce the total shield mass to reduce the construction cost. The shield design is configured to maintain the biological dose equivalent during operation {le} 0.5 mrem/h inside the subcritical hall, which is five times less than the allowable dose for working forty hours per week for 50 weeks per year. This study analyzed and designed the thickness and the shape of the radial and top shields of the neutron source based on the biological dose equivalent requirements inside the subcritical hall during operation. The Monte Carlo code MCNPX is selected because of its capabilities for transporting electrons, photons, and neutrons. Mesh based weight windows variance reduction technique is utilized to estimate the biological dose outside the shield with good statistics. A significant effort dedicated to the accurate prediction of the biological dose equivalent outside the shield boundary as a function of the shield thickness without geometrical approximations or material homogenization. The building wall was designed with ordinary concrete to reduce the biological dose equivalent to the public with a safety factor in the range of 5 to 20.

  3. Retrospection of Chernobyl nuclear accident for decision analysis concerning remedial actions in Ukraine

    SciTech Connect (OSTI)

    Georgievskiy, Vladimir [Russian Research Center 'Kurchatov Insitute', Kurchatov Sq., 1, 123182 Moscow (Russian Federation)

    2007-07-01T23:59:59.000Z

    It is considered the efficacy of decisions concerning remedial actions when of-site radiological monitoring in the early and (or) in the intermediate phases was absent or was not informative. There are examples of such situations in the former Soviet Union where many people have been exposed: releases of radioactive materials from 'Krasnoyarsk-26' into Enisey River, releases of radioactive materials from 'Chelabinsk-65' (the Kishtim accident), nuclear tests at the Semipalatinsk Test Site, the Chernobyl nuclear accident etc. If monitoring in the early and (or) in the intermediate phases is absent the decisions concerning remedial actions are usually developed on the base of permanent monitoring. However decisions of this kind may be essentially erroneous. For these cases it is proposed to make retrospection of radiological data of the early and intermediate phases of nuclear accident and to project decisions concerning remedial actions on the base of both retrospective data and permanent monitoring data. In this Report the indicated problem is considered by the example of the Chernobyl accident for Ukraine. Their of-site radiological monitoring in the early and intermediate phases was unsatisfactory. In particular, the pasture-cow-milk monitoring had not been made. All official decisions concerning dose estimations had been made on the base of measurements of {sup 137}Cs in body (40 measurements in 135 days and 55 measurements in 229 days after the Chernobyl accident). For the retrospection of radiological data of the Chernobyl accident dynamic model has been developed. This model has structure similar to the structure of Pathway model and Farmland model. Parameters of the developed model have been identified for agricultural conditions of Russia and Ukraine. By means of this model dynamics of 20 radionuclides in pathways and dynamics of doses have been estimated for the early, intermediate and late phases of the Chernobyl accident. The main results are following: - During the first year after the Chernobyl accident 75-93% of Commitment Effective Dose had been formed; - During the first year after the Chernobyl accident 85-90% of damage from radiation exposure had been formed. During the next 50 years (the late phase of accident) only 10-15% of damage from radiation exposure will have been formed; - Remedial actions (agricultural remedial actions as most effective) in Ukraine are intended for reduction of the damage from consumption of production which is contaminated in the late phase of accident. I.e. agricultural remedial actions have been intended for minimization only 10 % of the total damage from radiation exposure; - Medical countermeasures can minimize radiation exposure damage by an order of magnitude greater than agricultural countermeasures. - Thus, retrospection of nuclear accident has essentially changed type of remedial actions and has given a chance to increase effectiveness of spending by an order of magnitude. This example illustrates that in order to optimize remedial actions it is required to use data of retrospection of nuclear accidents in all cases when monitoring in the early and (or) intermediate phases is unsatisfactory. (author)

  4. CIVIL ENGINEERING PREREQUISITE SUMMARY Note: BSCE candidate means that you have been admitted to upper division. CE enrolled means you are listed

    E-Print Network [OSTI]

    Levinson, David M.

    3316 Transportation Engineering BSCE cand. CE 3426 Soil Mechanics CE 2425, CE 2017, BSCE cand. CE 4096 & Engineering Drawing CE 2017 CE 3016 Surveying Math 1297 CE 3025 Environmental Engineering Chem 1151 or 1153 and 1154, CE 3221, BSCE cand. CE 3026 Project Management None CE 3027 Infrastructure Materials CE 2017

  5. American Power: Order (2010-CE-0911) | Department of Energy

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

    Power: Order (2010-CE-0911) American Power: Order (2010-CE-0911) October 5, 2010 DOE issued an Order and entered into a Compromise Agreement with American Power Solutions, Inc....

  6. rtino is prof of Cyber Ce

    E-Print Network [OSTI]

    Holland, Jeffrey

    Program Technolo Worksho Bertino is Compute systems Compute to secure rtino is prof of Cyber Ce internatio Database Indexing Intelligen Services the Very on the e Security& on Web, Program VLDB, A Data Eng distributed fessor of Co enter and R nce and Se mputer Scien EC laborator maden) in S ers Universi arch

  7. CeBiTec Symposium Molecular Biotechnology

    E-Print Network [OSTI]

    Moeller, Ralf

    F), Bielefeld University April 3 ­ 4, 2014 PROGRAMME Thursday, April 3rd, 2014 11:00 Registration / Snacks 12:00 Opening remarks Volker F. Wendisch, Bielefeld University, Germany Welcome addresses Martin Egelhaaf (Vice.N. (University of Paderborn) Introduction to the CeBiTec Thomas Noll, Bielefeld University, Germany Session I

  8. CE 473/573 Groundwater Course information

    E-Print Network [OSTI]

    Rehmann, Chris

    . Groundwater modeling 4.1. Introduction to finite-difference models 4.2. Models of groundwater flow 4.3. ModelsCE 473/573 Groundwater Fall 2011 Course information Instructor: Prof. Chris Rehmann rehmann of water and contaminants in groundwater systems to solve problems of groundwater resource evaluation

  9. CE 473/573 Groundwater Course information

    E-Print Network [OSTI]

    Rehmann, Chris

    -reactive and reactive contaminants 4. Groundwater modeling 4.1. Introduction to finite-difference models 4.2. Models of groundwater flow 4.3. Models of contaminant transport 4.4. Available models #12;Recommended textbooks FetterCE 473/573 Groundwater Fall 2009 Course information Instructor: Prof. Chris Rehmann rehmann

  10. Frequencies of micronuclei in bank voles from zones of high radiation at Chernobyl, Ukraine

    SciTech Connect (OSTI)

    Rodgers, B.E.; Baker, R.J.

    2000-06-01T23:59:59.000Z

    A population of Clethrionomys glareolus (bank vole) from a highly radioactive area within the Chernobyl, Ukraine exclusion zone was sampled in June 1997 and in June and October 1998. Internal radiation doses from radiocesium were estimated to be as high as 8 rads/d. Total dose, which takes into account the internal dose form radiostrontium and the surrounding environment, was estimated to be 15 to 20 rads/d. In contrast, individuals from a reference population lying outside of the exclusion zone registered negligible levels of contamination. The authors used the micronucleus test in a double-blind study to analyze blood samples from 58 individuals. They scored more than 600,000 polychromatic erythrocytes (PCEs) but could not reject the null hypothesis that the frequency of micronucleated PCEs in voles exposed to radiation was equal to the frequency in unexposed voles. Results of their study stand in sharp contrast to earlier reports of increased frequencies of micronuclei in rodents exposed to fallout of the Chernobyl accident, but with radiation doses that were orders of magnitude lower than those reported here. Radio resistance and experimental methods are possible explanations for these differences in the results.

  11. SPRING 2013 CEE COURSES: v7 rev: 11/08/12 TRANSPORTATION PLANNING as CE 4410 & CE 6410

    E-Print Network [OSTI]

    Acton, Scott

    options for urban transport. After a student registers for CE 4410 or CE WATER MARKETS with Brian Richter and Professor Culver as CE 6500 The utility. This project course will enable us to identify what works best, and how to avoid

  12. Anchoring Sites for Initial Au Nucleation on CeO2{111}: O Vacancy versus Ce Vacancy Changjun Zhang,

    E-Print Network [OSTI]

    Alavi, Ali

    Anchoring Sites for Initial Au Nucleation on CeO2{111}: O Vacancy versus Ce Vacancy Changjun Zhang is a matter of debate. Both oxygen and cerium vacancies have been suggested as the anchoring sites initio thermodynamics approaches to investigate the formation of various vacancies at a CeO2{111} surface

  13. A Comprehensive Study on Phytoextractive Potential of Sri Lankan Mustard (Brassica

    E-Print Network [OSTI]

    Juncea (l. Czern; Coss Genotypes; S. Somaratne; S. R. Weerakoon

    AbstractHeavy metal pollution is an environmental concern. Phytoremediation is a low-cost, environmental-friendly approach to solve this problem. Mustard has the potential in reducing heavy metal contents in soils. Among mustard (Brassica juncea (L.) Czern & Coss) genotypes in Sri Lanka, accessions 7788, 8831 and 5088 give significantly a high yield. Therefore, present study was conducted to quantify the phytoextractive potential among these local mustard accessions and to assess the interaction of heavy metals, Pb, Co, Mn on phytoextraction. A pot experiment was designed with acid washed sand (quartz) and a series of heavy metal solutions of 0, 25, 50, 75 and 100 g/g. Experiment was carried out with factorial experimental design. Mustard accessions were tolerant to heavy metals and could be successfully used in removal of Pb, Co and Mn and they are capable of accumulating significant quantities of heavy metals in vegetative and reproductive organs. The order of the accumulative potential of Pb, Co and Mn in mustard accessions is, root> shoot>seed. KeywordsBrassica juncea, heavy metal hyper-accumulation, phytoremediation T I.

  14. CeCap LLP | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCTBarreis aCallahanWindSyracuse, NY JumpKS"Cayucos,CeCap LLP

  15. CIVIL ENGINEERING Prerequisite Summary Note: BSCE candidate means that you have been admitted to upper division. CE enrolled means you are listed with

    E-Print Network [OSTI]

    Levinson, David M.

    , Math 3280 (conc), BSCE cand. CE 3316 Transportation Engineering BSCE cand. CE 3426 Soil Mechanics CE & Engineering Drawing CE 2017, BSCE cand. CE 3016 Surveying Math 1297, BSCE cand. CE 3025 Environmental Engineering Chem 1151 or 1153 and 1154, CE 3221, BSCE cand. CE 3026 Project Management BSCE cand. CE 3027

  16. Universitt Bielefeld Centrum fr Biotechnologie -CeBiTec

    E-Print Network [OSTI]

    Moeller, Ralf

    for the development of algal biotechnology Center for Interdisciplinary Research (ZiF), Bielefeld University, Germany September 21 ­ 24, 2014 The Center for Biotechnology (CeBiTec) of Bielefeld University cordially invites you include The 2014 International CeBiTec Research Conference aims to give a complete overview

  17. The Role of the George Kuzmycz Training Center in Improving the Nuclear Material Management Culture in Ukraine.

    SciTech Connect (OSTI)

    Gavrylyuk, V. I. (Viktor I.); Scherbachenko, A. M. (Alexander M.); Bazavov, D. A. (Dmitri A.); Kyryshchuk, V. I. (Volodymyr I.); Robinson, P. (Phil); Sheppard, G. A. (Gregory A.)

    2001-01-01T23:59:59.000Z

    The George Kuzmycz Training Center for Physical Protection, Control and Accounting (GKTC) was established in 1998 in a collaborative endeavor of the State Nuclear Regulatory Administration of Ukraine, the Ukrainian Academy of Sciences, and the U.S. Department of Energy. Located at the Institute for Nuclear Research in Kyiv, the GKTC provides theoretical and practical training in physical protection, control, and accounting techniques and systems that are employed to reduce the risk of unauthorized use, theft, or diversion of weapons-usable nuclear material. Participants in GKTC workshops and courses include nuclear facility specialists as well as officials of the State's regulatory authorities. Recently, the training scope has been broadened to include students from other nations in the region.

  18. Synthesis and structure of nanocrystalline mixed CeYb silicates

    SciTech Connect (OSTI)

    Ma?ecka, Ma?gorzata A., E-mail: M.Malecka@int.pan.wroc.pl; K?pi?ski, Leszek

    2013-07-15T23:59:59.000Z

    Graphical abstract: - Highlights: New method of synthesis of nanocrystalline mixed lanthanide silicates is proposed. Formation of A-type (Ce{sub 1?y}Yb{sub y}){sub 2}Si{sub 2}O{sub 7} in well dispersed Ce{sub 1?x}Yb{sub x}O{sub 2?(x/2)}SiO{sub 2} system. Formation of Yb{sub y}Ce{sub 9.33?y}(SiO{sub 4}){sub 6}O{sub 2} in agglomerated Ce{sub 1?x}Yb{sub x}O{sub 2?(x/2)}SiO{sub 2} system. - Abstract: This work presents results of studies on synthesis and structure of mixed, nanocrystalline CeYb silicates. Using TEM, XRD and FTIR we showed that heat treatment of nanocrystalline Ce{sub 1?x}Yb{sub x}O{sub 2?(x/2)} (x = 0.3, 0.5) mixed oxide supported on amorphous silica in reducing atmosphere, results in formation of CeYb mixed silicates. Dispersion of the oxide on the silica surface and thus a local lanthanide/Si atomic ratio determines the stoichiometry of the silicate. Oxide crystallites uniformly dispersed on the silica surface transformed into A-(Ce{sub 1?y}Yb{sub y}){sub 2}Si{sub 2}O{sub 7} disilicate, while the agglomerated nanoparticles converted into Yb{sub y}Ce{sub 9.33?y}(SiO{sub 4}){sub 6}O{sub 2} oxyapatite silicate as an intermediate phase.

  19. A review of "History of Ukraine-Rus: Economic, Cultural, and National Life in the Fourteenth to Seventeenth Centuries" by Mykhailo Hrushevsky

    E-Print Network [OSTI]

    Stevens, Carol B.

    2014-01-01T23:59:59.000Z

    253 seventeenth-century news Mykhailo Hrushevsky. History of Ukraine-Rus Vol. 6: Economic, Cultural, and National Life in the Fourteenth to Seventeenth Centuries. Translated by Leonid Heretz. Myron M Kapral, Consulting Editor and Frank E Sysyn... cited by Hrushevsky, two appendixes, and a comprehensive index have also been provided for the readers benefit. Prof. Frank E. Sysyn, direc- tor of the Petro Jacyk Central and East European Resource Centre, remains the series editor, assisted...

  20. Ferromagnetism in chemically synthesized CeO2 nanoparticles by...

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

    by Ni doping. Ferromagnetism in chemically synthesized CeO2 nanoparticles by Ni doping. Abstract: This work reports the discovery of room-temperature ferromagnetism in 5 - 9 nm...

  1. Ca2+-Doped CeBr3 Scintillating Materials

    SciTech Connect (OSTI)

    Guss, Paul [NSTec; Foster, Michael E. [SNL; Wong, Bryan M. [SNL; Doty, F. Patrick [SNL; Shah, Kanai [RMD; Squillante, Michael R. [RMD; Shirwadkar, Urmila [RMD; Hawrami, Rastgo [RMD; Tower, Josh [RMD; Yuan, Ding [NSTec

    2014-01-01T23:59:59.000Z

    Despite the outstanding scintillation performance characteristics of cerium tribromide (CeBr3) and cerium-activated lanthanum tribromide, their commercial availability and application are limited due to the difficulties of growing large, crack-free single crystals from these fragile materials. This investigation employed aliovalent doping to increase crystal strength while maintaining the optical properties of the crystal. One divalent dopant (Ca2+) was used as a dopant to strengthen CeBr3 without negatively impacting scintillation performance. Ingots containing nominal concentrations of 1.9% of the Ca2+ dopant were grown. Preliminary scintillation measurements are presented for this aliovalently doped scintillator. Ca2+-doped CeBr3 exhibited little or no change in the peak fluorescence emission for 371 nm optical excitation for CeBr3. The structural, electronic, and optical properties of CeBr3 crystals were studied using the density functional theory within the generalized gradient approximation. The calculated lattice parameters are in good agreement with the experimental data. The energy band structures and density of states were obtained. The optical properties of CeBr3, including the dielectric function, were calculated.

  2. Effects of CeO2 Support Facets on VOx/CeO2 Catalysts in Oxidative...

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

    The higher activity for VOxCeO2(110) might be related to the more abundant oxygen vacancies present on the (110) facets, evidenced from Raman spectroscopic measurements....

  3. The bovine tuberculosis burden in cattle herds in zones with low dose radiation pollution in the Ukraine

    SciTech Connect (OSTI)

    Weller, Richard E.; Skrypnyk, Artem; Zavgorodniy, Andriy; Stegniy, Borys; Gerilovych, Anton; Kutsan, Oleksandr; Pozmogova, Svitlana; Sapko, Svitlana

    2009-02-01T23:59:59.000Z

    The authors describe a study of the tuberculosis (TB) incidence in cattle exposed to low doses of radiation resulting from the Chernobyl (pronounced Chornobyl in Ukrainian) nuclear plant catastrophe in 1986. The purpose of the study was to determine if ionising radiation influences the number of outbreaks of bovine TB and their severity on farms in the Kyiv, Cherkasy and Chernigiv regions of the Ukraine. These farms are all located within a 200 km radius of Chernobyl and have had low?dose radiation pollution. Pathological and blood samples were taken from cattle in those regions that had positive TB skin tests. Mycobacterium spp. were isolated, differentiated by PCR, analysed and tested in guinea?pigs and rabbits. Species differentiation showed a significant percentage of atypical mycobacteria, which resulted in the allergic reactions to tuberculin antigen in the skin test. Mixed infection of M. bovis and M. avium subsp. hominissuis was found in three cases. The results concluded that low?dose radiation plays a major role in the occurrence of bovine TB in regions affected by the Chernobyl nuclear disaster.

  4. Homoleptic Ce(III) and Ce(IV) Nitroxide Complexes: Significant Stabilization of the 4+ Oxidation State

    SciTech Connect (OSTI)

    Bogart, Justin A.; Lewis, Andrew J.; Medling, Scott A.; Piro, Nicholas A.; Carroll, Patrick J.; Booth, Corwin H.; Schelter, Eric J.

    2014-06-25T23:59:59.000Z

    Electrochemical experiments performed on the complex Ce-IV[2-((BuNO)-Bu-t)py](4), where [2-((BuNO)-Bu-t)py](-) = N-tert-butyl-N-2-pyridylnitroxide, indicate a 2.51 V stabilization of the 4+ oxidation state of Ce compared to [(Bu4N)-Bu-n](2)[Ce(NO3)(6)] in acetonitrile and a 2.95 V stabilization compared to the standard potential for the ion under aqueous conditions. Density functional theory calculations suggest that this preference for the higher oxidation state is a result of the tetrakis(nitroxide) ligand framework at the Ce cation, which allows for effective electron donation into, and partial covalent overlap with, vacant 4f orbitals with delta symmetry. The results speak to the behavior of CeO2 and related solid solutions in oxygen uptake and transport applications, in particular an inherent local character of bonding that stabilizes the 4+ oxidation state. The results indicate a cerium(IV) complex that has been stabilized to an unprecedented degree through tuning of its ligand-field environment.

  5. Luminescence Enhancement of CdTe Nanostructures in LaF3:Ce/CdTe...

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

    Enhancement of CdTe Nanostructures in LaF3:CeCdTe Nanocomposites. Luminescence Enhancement of CdTe Nanostructures in LaF3:CeCdTe Nanocomposites. Abstract: Radiation detection...

  6. The suburban villa (munya) and court culture in Umayyad Cordoba (756-976 CE)

    E-Print Network [OSTI]

    Anderson, Glaire D

    2005-01-01T23:59:59.000Z

    As the capital of the Umayyad dynasty (r. 756 CE-1031 CE), the city of Cordoba developed into one of the most renowned urban centers of the western Mediterranean. The Great Mosque of Cordoba is the outstanding testament ...

  7. CE 467 / 567 HIGHWAY SAFETY AND OPERATIONS Fall 2006 Course Syllabus

    E-Print Network [OSTI]

    Hickman, Mark

    1 CE 467 / 567 HIGHWAY SAFETY AND OPERATIONS Fall 2006 Course Syllabus Catalog This course of class) #12;2 CE 467 / 567 HIGHWAY SAFETY AND OPERATIONS Fall 2006 Course Syllabus Course Outline: What

  8. E-Print Network 3.0 - allanita-ce vinculadas al Sample Search...

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

    allanita-ce vinculadas al Search Powered by Explorit Topic List Advanced Search Sample search results for: allanita-ce vinculadas al Page: << < 1 2 3 4 5 > >> 1 Elena Garrigs Mic,...

  9. CE FLNG, LLC - FE DKT. NO. 12-123-LNG - ORDER 3193 | Department...

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

    CE FLNG, LLC - FE DKT. NO. 12-123-LNG - ORDER 3193 CE FLNG, LLC - FE DKT. NO. 12-123-LNG - ORDER 3193 No reports submitted for this docket. More Documents & Publications...

  10. Proactive Design of n-Type (In, Ce) Filled Skutterudites Enabling...

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

    Design of n-Type (In, Ce) Filled Skutterudites Enabling High-Temperature Waste Heat Recovery Proactive Design of n-Type (In, Ce) Filled Skutterudites Enabling High-Temperature...

  11. Magnetic structures and interplay between rare-earth Ce and Fe magnetism in single-crystal CeFeAsO

    SciTech Connect (OSTI)

    Zhang, Qiang [Ames Laboratory; Tian, Wei [Ames Laboratory; Li, Haifeng [Ames Laboratory; Kim, Jong-Woo [Argonne Naitonal Laboratory; Yan, Jiaqiang [Ames Laboratory; McCallum, Robert William [Ames Laboratory; Lograsso, Thomas A. [Ames Laboratory; Zarestky, Jerel L. [Ames Laboratory; Budko, Sergey L. [Ames Laboratory; McQueeney, Robert J. [Ames Laboratory; Vaknin, David [Ames Laboratory

    2013-11-27T23:59:59.000Z

    Neutron and synchrotron resonant x-ray magnetic scattering (RXMS) complemented by heat capacity and resistivity measurements reveal the evolution of the magnetic structures of Fe and Ce sublattices in a CeFeAsO single crystal. The RXMS of magnetic reflections at the Ce LII edge shows a magnetic transition that is specific to the Ce antiferromagnetic long-range ordering at TCe? 4 K with short-range Ce ordering above TCe, whereas neutron diffraction measurements of a few magnetic reflections indicate a transition at T?? 12 K with an unusual order parameter. Detailed order-parameter measurements on several magnetic reflections by neutrons show a weak anomaly at 4 K that we associate with the Ce ordering. The successive transitions at TCe and T? can also be clearly identified by two anomalies in heat capacity and resistivity measurements. The higher transition temperature at T?? 12 K is mainly ascribed to Fe spin reorientation transition, below which Fe spins rotate uniformly and gradually in the ab plane. The Fe spin reorientation transition and short-range Ce ordering above TCe reflect the strong Fe-Ce couplings prior to long-range ordering of the Ce. The evolution of the intricate magnetic structures in CeFeAsO going through T? and TCe is proposed.

  12. ue Ce ec o o es o a Energy Efficiency &

    E-Print Network [OSTI]

    phenomena improving MEA and stack performance · Optimize fuel cells and systems for early marketue Ce ec o o es o a Energy Efficiency & Renewable Energy Fuel Cell Bus Workshop Overview and Purppose Dimitrios Papageorgopoulos Fuel Cell Technologgies Proggram DOE and DOT Joint Fuel Cell Bus

  13. University of Saskatchewan College of Arts & sCienCe

    E-Print Network [OSTI]

    Patterson, William P.

    University of Saskatchewan College of Arts & sCienCe Annual report 2009/2010 #12;Contents The Dean thought....The strong work ethic of the youth of Saskatchewan, who are then exposed to high- minded Simard, BA'69, LLB'70 Minister of Health, Government of Saskatchewan (1991­1995) #12;The dean's message I

  14. 2014 Course Description Solid Waste Engineering -CE 477

    E-Print Network [OSTI]

    Barlaz, Morton A.

    2014 Course Description Solid Waste Engineering - CE 477 Engineering Principles of Solid Waste on course web site http://people.engr.ncsu.edu/barlaz/ Solid Waste Technology & Management by Christensen et al (eBook available through NCSU libraries) Solid waste management must be addressed by virtually

  15. CE 469 / 569 TRAVEL DEMAND MODELING Spring 2006 Course Syllabus

    E-Print Network [OSTI]

    Hickman, Mark

    of travel demand data, and should apply these methods to estimating and to forecasting travel demand these to practical modeling scenarios. The student should also use existing computer tools to forecast travel demand1 CE 469 / 569 TRAVEL DEMAND MODELING Spring 2006 Course Syllabus Catalog Detailed investigation

  16. Seven-quasiparticle bands in {sup 139}Ce

    SciTech Connect (OSTI)

    Chanda, Somen; Bhattacharjee, Tumpa; Bhattacharyya, Sarmishtha; Mukherjee, Anjali; Basu, Swapan Kumar; Ragnarsson, I.; Bhowmik, R. K.; Muralithar, S.; Singh, R. P.; Ghugre, S. S.; Pramanik, U. Datta [Variable Energy Cyclotron Centre, Kolkata 700064 (India); Division of Mathematical Physics, Lund Institute of Technology, Lund University, P. O. Box 118, S-22100 Lund (Sweden); Inter University Accelerator Centre, New Delhi 110067 (India); University Grants Commission and Department of Atomic Energy Consortium for Scientific Research, Kolkata 700098 (India); Saha Institute of Nuclear Physics, Kolkata 700064 (India)

    2009-05-15T23:59:59.000Z

    The high spin states in the {sup 139}Ce nucleus have been studied by in-beam {gamma}-spectroscopic techniques using the reaction {sup 130}Te({sup 12}C,3n){sup 139}Ce at E{sub beam}=65 MeV. A gamma detector array, consisting of five Compton-suppressed Clover detectors was used for coincidence measurements. 15 new levels have been proposed and 28 new {gamma} transitions have been assigned to {sup 139}Ce on the basis of {gamma}{gamma} coincidence data. The level scheme of {sup 139}Ce has been extended above the known 70 ns (19/2){sup -} isomer up to {approx}6.1 MeV in excitation energy and (35/2)({Dirac_h}/2{pi}) in spin. The spin-parity assignments for most of the newly proposed levels have been made using the deduced Directional Correlation from Oriented states of nuclei (DCO ratio) and the Polarization Directional Correlation from Oriented states (PDCO ratio) for the de-exciting transitions. The observed level structure has been compared with a large basis shell model calculation and also with the predictions from cranked Nilsson-Strutinsky (CNS) calculations. A general consistency has been observed between these two different theoretical approaches.

  17. CE 4990 -Construction Scheduling Week 1: Steel Frame Project

    E-Print Network [OSTI]

    Mukherjee, Amlan

    CE 4990 - Construction Scheduling Week 1: Steel Frame Project Fall 2011 January 13, 2012 Introduction You are a construction manager for a project to build a steel frame for an office building1 of 964 pre-fabricated structural steel members will be used in the construction. The standard bay size

  18. Thermodynamic and Structural Features of Aqueous Ce(III)

    SciTech Connect (OSTI)

    Adriana Dinescu; Aurora E. Clark

    2008-10-01T23:59:59.000Z

    With a single f-electron, Ce(III) is the simplest test case for benchmarking the thermodynamic and structural properties of hydrated Ln(III) against varying density functionals and reaction field models, in addition to determining the importance of multiconfigurational character in their wave functions. Here, the electronic structure of Ce(H2O)x(H2O)y3+ (x = 8, 9; y = 0, 12-14) has been examined using DFT and CASSCF calculations. The latter confirmed that the wave function of octa- and nona-aqua Ce(III) is well-described by a single configuration. Benchmarking was performed for density functionals, reaction field cavity types, and solvation reactions against the experimental free energy of hydration, ?Ghyd(Ce3+). The UA0, UAKS, Pauling, and UFF polarized continuum model cavities displayed different performance, depending on whether one or two hydration shells were examined, and as a function of the size of the metal basis set. These results were essentially independent of the density functional employed. Using these benchmarks, the free energy for water exchange between CN = 8 and CN = 9, for which no experimental data are available, was estimated to be approximately -4 kcal/mol.

  19. Thermodynamic and Structural Features of Aqueous Ce(III)

    SciTech Connect (OSTI)

    Dinescu, Adriana; Clark, Aurora E.

    2008-10-10T23:59:59.000Z

    With a single f-electron, Ce(III) is the simplest test case for benchmarking the thermodynamic and structural properties of hydrated Ln(III) against varying density functionals and reaction field models, in addition to determining the importance of multiconfigurational character in their wave functions. Here, the electronic structure of Ce(H?O)x(H?O)y 3+ (x =8, 9; y= 0, 12-14) has been examined using DFT and CASSCF calculations. The latter confirmed that the wave function of octa- and nona-aqua Ce(III) is well-described by a single configuration. Benchmarking was performed for density functionals, reaction field cavity types, and solvation reactions against the experimental free energy of hydration, ?Ghyd(Ce3+). The UA0, UAKS, Pauling, and UFF polarized continuum model cavities displayed different performance, depending on whether one or two hydration shells were examined, and as a function of the size of the metal basis set. These results were essentially independent of the density functional employed. Using these benchmarks, the free energy for water exchange between CN = 8 and CN = 9, for which no experimental data are available, was estimated to be approximately -4 kcal/mol.

  20. CO Oxidation mechanism on CeO2-supported Au nanoclusters

    SciTech Connect (OSTI)

    Kim H. Y.; Henkelman, G.

    2013-09-08T23:59:59.000Z

    To reveal the richer chemistry of CO oxidation by CeO2 supported Au Nanoclusters(NCs)/Nanoparticles, we design Au13 and Au12 supported on a flat and a stepped-CeO2 model (Au/CeO2) and study various kinds of CO oxidation mechanisms at the Au-CeO2 interface and the Au NC as well.

  1. In this Issue International CeBiTec Research Conference on Algal Biotechnology

    E-Print Network [OSTI]

    Moeller, Ralf

    Biotechnology From September 21 to 24, 2014, the CeBiTec organized the 4th International CeBiTec Research production. In this respect, the 4th International CeBiTec Research Conference 2014 aimed to give a completeBiTec ­ Quarterly www.cebitec.uni-bielefeld.de #12;2 | 4 CeBiTec ­ Quarterly | Autumn 2014 International

  2. Neutron scattering of CeNi at the SNS-ORNL: A preliminary report

    SciTech Connect (OSTI)

    Mirmelstein, A. [Russian Federal Nuclear Center VNIITF, Snezhinsk, Russia; Podlesnyak, Andrey A [ORNL; Kolesnikov, Alexander I [ORNL; Saporov, B. [Oak Ridge National Laboratory (ORNL); Sefat, A.S. [Oak Ridge National Laboratory (ORNL); Tobin, J. G. [Lawrence Livermore National Laboratory (LLNL)

    2014-01-01T23:59:59.000Z

    This is a preliminary report of a neutron scattering experiment used to investigate 4f electron behavior in Ce.

  3. DAO O ce Note 1998-05 Version 1 Dated 12/06/1999 O ce Note Series on

    E-Print Network [OSTI]

    Assimilation Siegfried Schubert, Editor Documentation of the Physical-Space Statistical Analysis System (PSAS and sources, as well as the use of the multivariate formulation. An on-line version of this document can be obtained from the DAO. Robert M. Atlas, Acting Head Data Assimilation O ce Goddard Space Flight Center

  4. www.ce.udel.edu/speakers ENVIRONMENTAL ENGINEERING

    E-Print Network [OSTI]

    Kirby, James T.

    strategies" Dr. Angelia Seyfferth Assistant Professor Department of Plant and soil science UNIversITy Of DelAWAre MAR 08 "Tradeoffs in Water Quality Management: risk, economics and equity" Dr. Michael Kavanaugh-831-2442 "sustainable stormwater research" Dr. Robert G. Traver Director vIllANOvA CeNTer fOr The ADvANCeMeNT Of sUsTAINAbIlITy

  5. Forensic analyses of explosion debris from the January 2, 1992 Pd/D{sub 2}O electrochemistry incident at SRI International

    SciTech Connect (OSTI)

    Andresen, B.; Whipple, R.; Vandervoort, D.; Grant, P.

    1992-08-15T23:59:59.000Z

    The January 2, 1992 explosion in an electrochemistry laboratory at SRI International (SRI) resulted in the death of scientist Andrew Riley, and gained some notoriety due to its association with experimental work in the controversial field of cold fusion research. Selected components of explosion debris were subjected to forensic analyses at LLNL to elucidate potential causes of, or contributing factors to, the explosion. Interrogation of the debris by LLNL encompassed nuclear, chemical, physical, and materials investigations. Nuclear studies for the determination of tritium and neutron-activation products in stainless steel and brass were negative. No evidence of signature species indicative of orthodox nuclear events was detected. The inorganic and particulate analyses were likewise negative with respect to residues of unexpected chemical species. Such target compounds included conventional explosives, accelerants, propellants, or any exceptional industrial chemicals. The GC-MS analyses of trace organic components in the explosion debris provided perhaps the most interesting results obtained at LLNL. Although no evidence of organic explosives, oxidizers, or other unusual compounds was detected, the presence of a hydrocarbon oil in the interior of the electrochemical cell was established. It is likely that its source was lubricating fluid from the machining of the metal cell components. If residues of organic oils are present during electrolysis experiments, the potential exists for an explosive reaction in the increasingly enriched oxygen atmosphere within the headspace of a metal cell.

  6. Approved Module Information for CE1102, 2014/5 Module Title/Name: Organic Chemistry for Engineers Module Code: CE1102

    E-Print Network [OSTI]

    Neirotti, Juan Pablo

    Approved Module Information for CE1102, 2014/5 Module Title/Name: Organic Chemistry for Engineers Module Code: CE1102 School: Engineering and Applied Science Module Type: Standard Module New Module chemistry. Part 2: Introduction to Laboratory Skills To enable the student to develop good practical skills

  7. Strongly correlated electron behavior : superconductivity and non-Fermi liquid behavior in Ce?-xRxColn?

    E-Print Network [OSTI]

    Gonzales, Eileen

    2009-01-01T23:59:59.000Z

    T ( ) c T ( c ab La Ce Pr Nd PmSm Eu Gd Tb Dy Ho Er Tm YbSm x Ce La Tb La Ce Pr Nd PmSm Eu Gd Tb Dy Ho Er Tm Yb (b)g -1) J(J+1) Ce (a) La Ce Pr Nd PmSm Eu Gd Tb Dy Ho Er Tm Yb

  8. OVERVIEW OF THE COOPERATION BETWEEN THE CHERNOBYL CENTER'S INTERNATIONAL RADIOECOLOGY LABORATORY IN SLAVUTYCH, UKRAINE AND U.S. RESEARCH CENTERS BETWEEN 2000-2010

    SciTech Connect (OSTI)

    Farfan, E.; Jannik, T.

    2011-10-01T23:59:59.000Z

    The International Radioecology Laboratory (IRL) located in Slavutych, Ukraine was created in 1999 under the initiative of the United States Government and the Government of Ukraine in the framework of international cooperation on evaluation and minimization of consequences of the Chernobyl nuclear power plant (ChNPP) accident. Since the time the IRL was founded, it has participated in a large number of projects, including the following: (1) study of radionuclide accumulation, distribution, and migration in components of various ecological systems of the Chernobyl Exclusion Zone (ChEZ); (2) radiation dose assessments; (3) study of the effects of radiation influence on biological systems; (4) expert analysis of isotopic and quantitative composition of radioactive contaminants; (5) development of new methods and technologies intended for radioecological research; (6) evaluation of future developments and pathways for potential remediation of the ChEZ areas; (7) assistance in provision of physical protection systems for ionizing irradiation sources at Ukrainian enterprises; (8) reviews of open Russian language publications on issues associated with consequences of the ChNPP accident, radioactive waste management, radioecological monitoring, and ChNPP decommissioning; (9) conduct of training courses on problems of radioecology, radiation safety, radioecological characterization of test sites and environmental media, and on research methods; (10) conduct of on-site scientific conferences and workshops on the ChEZ and radioecology problems; participation in off-site scientific conferences and meetings; and (11) preparation of scientific and popular science publications, and interactions with mass media representatives. This article provides a brief overview of the major achievements resulting from this cooperation between the IRL and U.S. research centers.

  9. Chernobyl nuclear accident hydrologic analysis and emergency evaluation of radionuclide distributions in the Dnieper River, Ukraine, during the 1993 summer flood

    SciTech Connect (OSTI)

    Voitsekhovitch, O.V. [Ukrainian Hydrometeorological Inst., Kiev (Ukraine); Zheleznyak, M.J. [Ukrainian Academy of Sciences, Kiev (Ukraine). Cybernetics Center; Onishi, Y. [Pacific Northwest Lab., Richland, WA (United States)

    1994-06-01T23:59:59.000Z

    This report describes joint activities of Program 7.1.F, ``Radionuclide Transport in Water and Soil Systems,`` of the USA/Commonwealth of Independent States (CIS) Joint Coordinating Committee of Civilian Nuclear Reactor Safety to study the hydrogeochemical behavior of radionuclides released to the Pripyat and Dnieper rivers from the Chernobyl Nuclear Power Plant in Ukraine. These joint activities included rapid evaluation of radionuclide distributions in the Pripyat and Dnieper river system and field data evaluation and modeling for the 1993 summer flood to assist the Ukrainian government in their emergency response during the flood. In July-August 1993, heavy rainfall over the Pripyat River Catchment in Belarus and Ukraine caused severe flooding, significantly raising {sup 90}Sr concentrations in the river. Near the Chernobyl area, the maximum {sup 90}Sr concentration in the Pripyat River reached 20--25 PCi/L in early August; near the Pripyat River mouth, the concentration rose to 35 pCi/L. The peak {sup 90}Sr concentration in the Kiev Reservoir (a major source of drinking water for Kiev) was 12 pCi/L. Based on these measured radionuclide levels, additional modeling results and the assumption of water purification in a water treatment station, {sup 90}Sr concentrations in Kiev`s drinking water were estimated to be less than 8 pCi/L. Unlike {sup 90}Sr, {sup 137}Cs concentrations in the Pripyat River during the flood did not rise significantly to the pre-flood levels. Estimated {sup 137}Cs concentrations for the Kiev drinking water were two orders of magnitude lower than the drinking water standard of 500 pCi/L for {sup 137}Cs.

  10. Whirlpool: Order (2014-CE-21010) | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Owned SmallOf TheViolations | Department of Energyis EIA? Andof4-CE-21010)

  11. LG: Proposed Penalty (2015-CE-14022) | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10 DOEWashington, DCKickoffLDV5-CE-14022) LG: Proposed Penalty

  12. Sunpentown: Order (2012-CE-1505) | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of Energy Strain Rate4 RecoveryJulyEvaluationOffi ce U.S. DepartmentOrder

  13. Ethanol Steam Reforming on Co/CeO2: The Effect of ZnO Promoter

    SciTech Connect (OSTI)

    Davidson, Stephen; Sun, Junming; Wang, Yong

    2013-12-02T23:59:59.000Z

    A series of ZnO promoted Co/CeO2 catalysts were synthesized and characterized using XRD, TEM, H2-TPR, CO chemisorption, O2-TPO, IR-Py, and CO2-TPD. The effects of ZnO on the catalytic performances of Co/CeO2 were studied in ethanol steam reforming. It was found that the addition of ZnO facilitated the oxidation of Co0 via enhanced oxygen mobility of the CeO2 support which decreased the activity of Co/CeO2 in CC bond cleavage of ethanol. 3 wt% ZnO promoted Co/CeO2 exhibited minimum CO and CH4 selectivity and maximum CO2 selectivity. This resulted from the combined effects of the following factors with increasing ZnO loading: (1) enhanced oxygen mobility of CeO2 facilitated the oxidation of CHx and CO to form CO2; (2) increased ZnO coverage on CeO2 surface reduced the interaction between CHx/CO and Co/CeO2; and (3) suppressed CO adsorption on Co0 reduced CO oxidation rate to form CO2. In addition, the addition of ZnO also modified the surface acidity and basicity of CeO2, which consequently affected the C2C4 product distributions.

  14. CeBr3 as a High-Resolution Gamma-Ray Detector

    SciTech Connect (OSTI)

    Michael Reed, Paul Guss, Christopher Contreras

    2008-11-13T23:59:59.000Z

    Lanthanum halide (LaBr3:Ce) scintillators have been well-documented as high-resolution gamma-ray detectors that are operated at room temperature. These scintillators have better resolution (<3% at 662 keV) relative to sodium iodide (NaI(Tl)) scintillators (7% at 662 keV), but the naturally occurring radioactive isotope 138La causes self-activity in the crystal that occludes portions of the gamma-ray spectrum. This selfactivity limits the use of LaBr3:Ce in high-sensitivity applications. Cerium, the dopant in the LaBr3:Ce matrix possesses useful scintillation properties, and its selfactivity is on the order of 3750 times less than La; however, Ce has not been fully characterized as the chief component in a scintillation detector. This work investigated Ce as the key scintillation matrix component in a scintillation detector with the hypothesis that CeBr3 promises energy resolution comparable or superior to LaBr3:Ce. The researchers involved with this work believe that CeBr3 may be the answer to obtaining high-temperature, high-resolution spectra with greater sensitivity than LaBr3:Ce.

  15. Capillary electrophoresis-fluorescence line narrowing system (CE-FLNS) for on-line structural characterization

    DOE Patents [OSTI]

    Jankowiak, R.J.; Small, G.J.; Shields, P.A.

    1999-04-27T23:59:59.000Z

    Capillary electrophoresis (CE) is interfaced with low temperature fluorescence line-narrowing (FLN) spectroscopy for on-line structural characterization of separated molecular analytes. 21 figs.

  16. SRI-CAT

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln n51964780620999 11th

  17. SRI2007 Conference - Accommodations

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln n51964780620999 11th

  18. SRI2007 Conference - Committee

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln n51964780620999 11th

  19. SRI2007 Conference - Proceedings

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln n51964780620999

  20. SRI2007 Conference - Schedule

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln n51964780620999 Home

  1. SRI2007 Conference - Vendors

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln n51964780620999Vendors

  2. SRI2007 Conference - Workshops

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,#2446Smalln

  3. The Complex Core Level Spectra of CeO2: An Analysis in Terms of Atomic and Charge Transfer Effects

    SciTech Connect (OSTI)

    Bagus, Paul S.; Nelin, Constance J.; Ilton, Eugene S.; Baron, Martin; Abbott, Heather; Primorac, Elena; Kuhlenbeck, Helmut; Shaikhutdinov, Shamil; Freund, Hans-Joachim

    2010-03-05T23:59:59.000Z

    We present a rigorous parameter-free theoretical treatment of the Ce 4s and 5s photoelectron spectra of CeO2. In the currently accepted model the satellite structure in the photoelectron spectra is explained in terms of a mixed valence (Ce 4f0 O 2p6, Ce 4f1 O 2p5, and Ce 4f2 O 2p4) con?guration. We show that charge transfer (CT) into Ce 5d as well as con?gurations involving intra-atomic movement of charge must be considered in addition and compute their contributions to the spectra.

  4. Interaction of carbon monoxide with oxygen in the adsorbed layer on Pd, Ce, Pd-Ce catalysts supported on /gamma/-Al/sub 2/O/sub 3/

    SciTech Connect (OSTI)

    Savel'eva, G.A.; Sass, A.S.; Speranskaya, G.V.; Tenchev, K.K.; Petrov, L.A.; Vozdvizhenskii, V.F.; Galeev, T.K.; Popova, N.M.

    1989-01-01T23:59:59.000Z

    The adsorption of CO and the interaction of CO/sub ads/ with O/sub 2/ on Pd, Ce, and Pd-Ce//gamma/-Al/sub 2/O/sub 3/ (0.5 wt. % Pd, 2.0 wt. % Ce) has been studied using the methods of IR spectroscopy and differential scanning calorimetry. The identity of the adsorbed CO complexes, the temperature ranges over which they desorb, and their reactivity with O/sub 2/ have been established. The interaction of bridging and carbonate - carboxylate CO complexes and carbon (disproportionation and dissociation products) with O/sub 2/ on Pd and Pd-Ce catalysts is preceded by the coadsorption of oxygen and the evolution of heat. During the oxidation of CO, autooscillation, heat evolution, and the concentration of oxygen in the flow are observed.

  5. CO Oxidation at the Interface of Au Nanoclusters and the Stepped-CeO2(111) Surface

    SciTech Connect (OSTI)

    Kim H. Y.; Henkelman, G.

    2013-01-14T23:59:59.000Z

    To reveal the richer chemistry of CO oxidation by CeO2 supported Au Nanoclusters NCs)/Nanoparticles, we design a Au12 supported on a stepped-CeO2 model (Au/CeO2-step) and study various kinds of CO oxidation mechanisms at the interface of the Au/CeO2-step: oxygen spillover from the CeO2 to the Au NCs;2 CO oxidation by the O2 bound to the Au-Ce3+ interface;3 and CO oxidation by the Mars-van Krevelen (M-vK) mechanism.4 DFT+U calculations show that lattice oxygen at the CeO2 step edge oxidizes CO bound to Au NCs by the M-vK mechanism. CO2 desorption determines the rate of CO oxidation and the vacancy formation energy (Evac) is a reactivity descriptor for CO oxidation. The maximum Evac that insures spontaneous CO2 production is higher for the Au/CeO2-step than the Au/CeO2-surface suggesting that the CeO2-step is a better supporting material than the CeO2-surface for CO oxidation by the Au/CeO2. Our results also suggest that for CO oxidation by Au NCs supported on nano- or meso-structured CeO2, which is the case of industrial catalysts, the M-vK mechanism accounts for a large portion of the total activity.

  6. Atomistic Study of Doped BaCeO3: Dopant Site-Selectivity and Cation Nonstoichiometry

    E-Print Network [OSTI]

    Haile, Sossina M.

    of Technology, Pasadena, California 91125, and Materials Chemistry Group, Chemistry DiVision, Uni, the trivalent dopants are assumed to occupy the Ce4+ -site, which introduces oxygen vacancies partitioning over both Ba and Ce sites. Such partitioning reduces the concentration of oxygen vacancies, which

  7. Ternary ceramic alloys of Zr-Ce-Hf oxides

    DOE Patents [OSTI]

    Becher, P.F.; Funkenbusch, E.F.

    1990-11-20T23:59:59.000Z

    A ternary ceramic alloy is described which produces toughening of zirconia and zirconia composites through the stress transformation from tetragonal phase to monoclinic phase. This alloy, having the general formula Ce[sub x]Hf[sub y]Zr[sub 1[minus]x[minus]y]O[sub 2], is produced through the addition of appropriate amounts of ceria and hafnia to the zirconia. Typically, improved toughness is achieved with about 5 to about 15 mol % ceria and up to about 40 mol % hafnia. The preparation of alloys of these compositions are given together with data as to the densities, tetragonal phase content, hardness and fracture toughness. The alloys are useful in preparing zirconia bodies as well as reinforcing ceramic composites. 1 fig.

  8. Ternary ceramic alloys of ZR-CE-HF oxides

    DOE Patents [OSTI]

    Becher, Paul F. (Oak Ridge, TN); Funkenbusch, Eric F. (White Bear Lake, MN)

    1990-01-01T23:59:59.000Z

    A ternary ceramic alloy which produces toughening of zirconia and zirconia composites through the stress transformation from tetragonal phase to monoclinic phase. This alloy, having the general formula Ce.sub.x Hf.sub.y Zn.sub.1-x-y O.sub.2, is produced through the addition of appropriate amounts of ceria and hafnia to the zirconia. Typically, improved toughness is achieved with about 5 to about 15 mol % ceria and up to about 40 mol % hafnia. The preparation of alloys of these compositions are given together with data as to the densities, tetragonal phase content, hardness and fracture toughness. The alloys are useful in preparing zirconia bodies as well as reinforcing ceramic composites.

  9. 1synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France; IPAG, Germany Univ. Paderborn, Germany

    E-Print Network [OSTI]

    Noé, Reinhold

    1synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France; IPAG, Germany synQPSK Univ. Paderborn, Germany CeLight Israel Photline, France IPAG, Germany Contract 004631 in FP6 IST-2002 Phase Shift Keying Transmission #12;2synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France

  10. Synthesis and magnetic properties of the double layer perovskite CeBaFe2O5+w

    E-Print Network [OSTI]

    de Lima, Oscar Ferreira

    Synthesis and magnetic properties of the double layer perovskite CeBaFe2O5+w R. L. de Almeida,1 O The synthesis, crystallographic structure, and magnetic properties of polycrystalline single-phase samples of CeBaFe results on the successful prepara- tion and characterization of polycrystalline CeBaFe2O5+w samples. Ideal

  11. Reassessment of Al-Ce and Al-Nd Binary Systems Supported by Critical Experiments and First-Principles

    E-Print Network [OSTI]

    Widom, Michael

    Reassessment of Al-Ce and Al-Nd Binary Systems Supported by Critical Experiments and First The present study reinvestigates the Al-Ce and Al-Nd phase diagrams and reoptimizes their thermody- namics results and theoretical calculations show that Al2Nd (or Al2Ce) should be treated as a stoichiometric

  12. Studies on Cu/CeO{sub 2}: A new NO reduction catalyst

    SciTech Connect (OSTI)

    Bera, P.; Aruna, S.T.; Patil, K.C.; Hegde, M.S. [Indian Inst. of Science, Bangalore (India)] [Indian Inst. of Science, Bangalore (India)

    1999-08-15T23:59:59.000Z

    Fine particle and large surface area Cu/CeO{sub 2} catalysts of crystallite sizes in the range of 100--200 {angstrom} synthesized by the solution combustion method have been investigated for NO reduction. Five percent Cu/CeO{sub 2} catalyst shows nearly 100% conversion of NO by NH{sub 3} below 300 C, whereas pure ceria and Zr, Y, and Ca doped ceria show 85--95% NO conversion above 600 C. Similarly NO reduction by CO has been observed over 5% Cu/CeO{sub 2} with nearly 100% conversion below 300 C. Hydrocarbon (n-butane) oxidation by NO to CO{sub 2}, N{sub 2}, and H{sub 2}O has also been demonstrated over this catalyst below 350 C making Cu/CeO{sub 2} a new NO reduction catalyst in the low temperature window of 150--350 C. Kinetics of NO reduction over 5% Cu/CeO{sub 2} have also been investigated. The rate constants are in the range of 1.4 {times} 10{sup 4} to 2.3 {times} 10{sup 4} cm{sup 3}/g s between 170 and 300 C. Cu/CeO{sub 2} catalysts are characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and electron paramagnetic resonance spectroscopy where Cu{sup 2+} ions are shown to be dispersed on the CeO{sub 2} surface.

  13. Studies on Ca2+-Doped CeBr3 Scintillating Materials

    SciTech Connect (OSTI)

    Guss, P. [NSTec; Foster, M. E. [SNL; Wong, B. M. [SNL; Doty, F. P. [SNL; Shah, K. [RMD; Squillante, M. [RMD; Glodo, J. [RMD; Yuan, D. [NSTec

    2013-07-03T23:59:59.000Z

    Despite the outstanding scintillation performance characteristics of cerium tribromide (CeBr3) and cerium-activated lanthanum tribromide (LaBr3:Ce), their commercial availability and application is limited due to the difficulties of growing large, crack-free single crystals from these fragile materials. The objective of this investigation was to employ aliovalent doping to increase crystal strength while maintaining the optical properties of the crystal. One divalent dopant (Ca2+) was investigated as a dopant to strengthen CeBr3 without negatively impacting scintillation performance. Ingots containing nominal concentrations of 1.9% of the Ca2+ dopant were grown. Preliminary scintillation measurements are presented for this aliovalently doped scintillator. Ca2+-doped CeBr3 exhibited little or no change in the peak fluorescence emission for 371 nm optical excitation for CeBr3. The structural, electronic, and optical properties of CeBr3 crystals were investigated using the density functional theory within generalized gradient approximation. The calculated lattice parameters are in good agreement with the experimental data. The energy band structures and density of states were obtained. The optical properties of CeBr3, including the dielectric function, were calculated.

  14. Studies on Ca2+-Doped CeBr3 Scintillating Materials

    SciTech Connect (OSTI)

    Guss, P. [NSTec; Foster, M. E. [SNL; Wong, B. M. [SNL; Doty, F. P. [SNL; Shah, K. [RMD; Squillante, M. R. [RMD; Shirwadkar, U. [RMD; Hawrami, R. [RMD; Tower, J. [RMD; Yuan, D. [NSTec

    2013-09-01T23:59:59.000Z

    Despite the outstanding scintillation performance characteristics of cerium tribromide (CeBr3) and cerium-activated lanthanum tribromide (LaBr3:Ce), their commercial availability and application is limited due to the difficulties of growing large, crack-free single crystals from these fragile materials. The objective of this investigation was to employ aliovalent doping to increase crystal strength while maintaining the optical properties of the crystal. One divalent dopant (Ca2+) was investigated as a dopant to strengthen CeBr3 without negatively impacting scintillation performance. Ingots containing nominal concentrations of 1.9% of the Ca2+ dopant were grown. Preliminary scintillation measurements are presented for this aliovalently doped scintillator. Ca2+-doped CeBr3 exhibited little or no change in the peak fluorescence emission for 371 nm optical excitation for CeBr3. The structural, electronic, and optical properties of CeBr3 crystals were investigated using the density functional theory within generalized gradient approximation. The calculated lattice parameters are in good agreement with the experimental data. The energy band structures and density of states were obtained. The optical properties of CeBr3, including the dielectric function, were calculated.

  15. CE 363 -TRANSPORTATION ENGINEERING AND PAVEMENT DESIGN Fall 2009 Course Syllabus

    E-Print Network [OSTI]

    Hickman, Mark

    1 CE 363 - TRANSPORTATION ENGINEERING AND PAVEMENT DESIGN Fall 2009 Course Syllabus Catalog (4) CDT Course Syllabus D2L: The primary source for homework, solutions, design project activities, and other

  16. Pressure tuning of competing magnetic interactions in intermetallic CeFe2

    SciTech Connect (OSTI)

    Wang, Jiyang; Feng, Yejun; Jaramillo, R.; van Wezel, Jasper; Canfield, Paul C.; Rosenbaum, T.F.

    2012-07-20T23:59:59.000Z

    We use high-pressure magnetic x-ray diffraction and numerical simulation to determine the low-temperature magnetic phase diagram of stoichiometric CeFe2. Near 1.5 GPa we find a transition from ferromagnetism to antiferromagnetism, accompanied by a rhombohedral distortion of the cubic Laves crystal lattice. By comparing pressure and chemical substitution we find that the phase transition is controlled by a shift of magnetic frustration from the Ce-Ce to the Fe-Fe sublattice. Notably the dominant Ce-Fe magnetic interaction, which sets the temperature scale for the onset of long-range order, remains satisfied throughout the phase diagram but does not determine the magnetic ground state. Our results illustrate the complexity of a system with multiple competing magnetic energy scales and lead to a general model for magnetism in cubic Laves phase intermetallic compounds.

  17. DEPARTMENT OF ENERGY EERE PROJECT MAN AGEM DIT CE:'

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

    OF ENERGY EERE PROJECT MAN AGEM DIT CE:'

  18. Ion-Beam-Induced Chemical Mixing at a Nanocrystalline CeO2&ndash...

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

    microscopy imaging and analysis suggest that this band of contrast is a cerium silicate phase with an approximate Ce:Si:O composition ratio of 1:1:3 in an amorphous nature....

  19. Data:B084b37a-3e1c-482d-8041-d7ce3e7aa0ce | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revision has been approved for this page.af74fa257cc No54a9102ce3e7aa0ce No

  20. Data:Ce82df4d-c557-42d2-a1f3-ce3b159222ae | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 No revisiona1f3-ce3b159222ae

  1. Electronic structure and f-orbital occupancy in Yb-substituted CeCoIn5

    SciTech Connect (OSTI)

    Booth, C. H.; Durakiewicz, T.; Capan, C.; Hurt, D.; Bianchi, A. D.; Joyce, J.J.; Fisk, Z.

    2011-05-03T23:59:59.000Z

    The local structure and 4f orbital occupancy have been investigated in Ce{sub 1?x}Yb{sub x}CoIn{sub 5} via Yb L{sub III}-edge extended x-ray absorption fine structure (EXAFS), Ce and Yb L{sub III}-edge x-ray absorption near-edge structure (XANES), and angle-resolved photoemission spectroscopy (ARPES) measurements. Yb(III) (4f{sup 13}) is the hole analog of Ce(III) (4f{sup 1}). Yb is found to be strongly intermediate-valent in Ce{sub 1?x}Yb{sub x}CoIn{sub 5} throughout the entire doping range, including pure YbCoIn{sub 5}, with an f-hole occupancy for Yb of n{sub f} ? 0.3 (i.e. Yb{sup 2.3+}), independent of Yb concentration and independent of temperature down to T = 20 K. In contrast, the f-electron orbital occupancy for Ce remains close to 1 for all Yb concentrations, suggesting that there is no mutual influence on n{sub f} between neighboring Ce and Yb sites. Likewise, ARPES measurements at 12 K have found that the electronic structure along {Gamma} ? X is not sensitive to the Yb substitution, suggesting that the Kondo hybridization of Ce f electrons with the conduction band is not affected by the presence of Yb impurities in the lattice. The emerging picture is that in Ce{sub 1?x}Yb{sub x}CoIn{sub 5} there are two networks, interlaced but independent, that couple to the conduction band: one network of Ce ions in the heavy-fermion limit, one network of Yb ions in the strongly intermediate-valent limit. The robustness of the local and electronic structure to doping suggests the absence of charge transfer between the Ce and Yb ions, and may explain the relative robustness of superconductivity for this Ce-site substitution as compared to the In-site substitution.

  2. 582014-15 Suggested Course Plan CompuTeR sCIenCe

    E-Print Network [OSTI]

    Zhou, Chongwu

    Algebra & Diff. Equations EE 364: Intro to Probability & Statistics or mATh 407: Probability Theory sCIenCe582014-15 Suggested Course Plan CompuTeR sCIenCe FIRST YEAR FALL: 16 units SPRING: 16 units SECOND104L,170 4 BASIC SCIENCE I 4 TECH. ELECTIVE I 4 TECH. ELECTIVE II 4 EE 364 MATH225or245 or MATH 407

  3. CeO2 and CuOx Interactions and the Controlled Assembly of CeO2(111) and CeO2(100) Nanoparticles on an Oxidized Cu(111)Substrate

    SciTech Connect (OSTI)

    Rodriguez J. A.; Yang F.; Choi Y.M.; Agnoli S.; Liu P.; Stacchiola D.; Hrbek J.

    2011-11-24T23:59:59.000Z

    The catalytic performance of ceria-based heterogeneous catalysts in many chemical transformations (water-gas shift reaction, CO oxidation, alcohol synthesis from CO/CO{sub 2} hydrogenation, etc.) is affected by the surface structure of the ceria. To control the performance of ceria-containing inverse catalysts, we devised a method to grow ceria nanoparticles (NPs) exposing exclusively either (111) or (100) surfaces and characterized their surface structures by scanning tunneling microscopy. When cerium is vapor-deposited on Cu(111) in a background of molecular O{sub 2}, only CeO{sub 2}(111) NPs grow. However, if the surface of Cu(111) is preoxidized with O{sub 2} or NO{sub 2} to form a rectangular copper oxide phase, probably Cu{sub 4}O{sub 3}(001), CeO{sub 2}(100) NPs grow on the oxide template instead. These experimental findings are interpreted using results of density functional calculations. The (100) surface of bulk ceria reconstructs to preserve charge neutrality. This is not necessary for CeO{sub 2}(100) NPs grown on Cu{sub 4}O{sub 3}(001), where the topmost oxygen layer of Cu{sub 4}O{sub 3} is shared with the interfacial layer of cerium. After the CeO{sub 2}(100)/CuO{sub x}/Cu(111) surfaces were exposed to CO, the copper oxide was reduced but the shape of the CeO{sub 2}(100) NPs remained intact. This opens the door for diverse applications in catalysis.

  4. Enhanced oxygen storage capacity of Ce{sub 0.88}Mn{sub 0.12}O{sub y} compared to CeO{sub 2}: An experimental and theoretical investigation

    SciTech Connect (OSTI)

    Zhang, Minhua; Jiang, Dongyu [Key Laboratory for Green Chemical Technology of Ministry of Education, R and D Center for Petrochemical Technology, Tianjin University, Tianjin 300072 (China)] [Key Laboratory for Green Chemical Technology of Ministry of Education, R and D Center for Petrochemical Technology, Tianjin University, Tianjin 300072 (China); Jiang, Haoxi, E-mail: hxjiang@tju.edu.cn [Key Laboratory for Green Chemical Technology of Ministry of Education, R and D Center for Petrochemical Technology, Tianjin University, Tianjin 300072 (China)] [Key Laboratory for Green Chemical Technology of Ministry of Education, R and D Center for Petrochemical Technology, Tianjin University, Tianjin 300072 (China)

    2012-12-15T23:59:59.000Z

    Graphical abstract: Display Omitted Highlights: ? Ce{sub 0.88}Mn{sub 0.12}O{sub y} and CeO{sub 2} hollow nanospheres were successfully prepared via a supercritical antisolvent process. ? Compared with the pure CeO{sub 2}, the Ce{sub 0.88}Mn{sub 0.12}O{sub y} has nearly the same surface area but more oxygen vacancies. ? DFT calculations shows that the surface oxygen of the CeO{sub 2} gets activated after doping Mn. -- Abstract: Ce{sub 0.88}Mn{sub 0.12}O{sub y} and CeO{sub 2} nanoparticles have been successfully prepared via a supercritical antisolvent process. High-resolution transmission electron microscopy displays the hollow and spherical structures of these nanoparticles. X-ray diffraction analysis demonstrates the formation of Ce{sub 0.88}Mn{sub 0.12}O{sub y} solid solution. N{sub 2} adsorption reveals that the Ce{sub 0.88}Mn{sub 0.12}O{sub y} has nearly the same surface area with the CeO{sub 2}. It is shown that the Ce{sub 0.88}Mn{sub 0.12}O{sub y} has higher oxygen storage capacity (OSC) than the CeO{sub 2}. To understand the mechanism of the improved OSC of the Mn doped CeO{sub 2}, Raman spectroscopy, X-ray photoelectron spectra and density functional theoretical (DFT) calculations have been performed. It is found that the Ce{sub 0.88}Mn{sub 0.12}O{sub y} presents more oxygen vacancies, indicating the easier of oxygen mobility from bulk to surface. DFT calculations reveal that structural and electronic modifications are caused by the incorporation of Mn in the CeO{sub 2}, resulting in activated oxygen species. The oxygen vacancy formation energy is lowered by the Mn doping. These changes are responsible for the enhanced OSC of the Ce{sub 0.88}Mn{sub 0.12}O{sub y}.

  5. Proactive Design of n-Type (In, Ce) Filled Skutterudites Enabling High-Temperature Waste Heat Recovery

    Broader source: Energy.gov [DOE]

    Thermoelectric and structural properties of n-type (In, Ce) filled skutterudites including power factors and ZT as a function of temperature are presented

  6. Mechanism of Methane Chemical Looping Combustion with Hematite Promoted with CeO2

    SciTech Connect (OSTI)

    Miller, Duane D.; Siriwardane, Ranjani

    2013-08-01T23:59:59.000Z

    Chemical looping combustion (CLC) is a promising technology for fossil fuel combustion that produces sequestration-ready CO{sub 2} stream, reducing the energy penalty of CO{sub 2} separation from flue gases. An effective oxygen carrier for CLC will readily react with the fuel gas and will be reoxidized upon contact with oxygen. This study investigated the development of a CeO{sub 2}-promoted Fe{sub 2}O{sub 3}?hematite oxygen carrier suitable for the methane CLC process. Composition of CeO{sub 2} is between 5 and 25 wt % and is lower than what is generally used for supports in Fe{sub 2}O{sub 3} carrier preparations. The incorporation of CeO{sub 2} to the natural ore hematite strongly modifies the reduction behavior in comparison to that of CeO{sub 2} and hematite alone. Temperature-programmed reaction studies revealed that the addition of even 5 wt % CeO{sub 2} enhances the reaction capacity of the Fe{sub 2}O{sub 3} oxygen carrier by promoting the decomposition and partial oxidation of methane. Fixed-bed reactor data showed that the 5 wt % cerium oxides with 95 wt % iron oxide produce 2 times as much carbon dioxide in comparison to the sum of carbon dioxide produced when the oxides were tested separately. This effect is likely due to the reaction of CeO{sub 2} with methane forming intermediates, which are reactive for extracting oxygen from Fe{sub 2}O{sub 3} at a considerably faster rate than the rate of the direct reaction of Fe{sub 2}O{sub 3} with methane. These studies reveal that 5 wt % CeO{sub 2}/Fe{sub 2}O{sub 3} gives stable conversions over 15 reduction/oxidation cycles. Lab-scale reactor studies (pulsed mode) suggest the methane reacts initially with CeO{sub 2} lattice oxygen to form partial oxidation products (CO + H{sub 2}), which continue to react with oxygen from neighboring Fe{sub 2}O{sub 3}, leading to its complete oxidation to form CO{sub 2}. The reduced cerium oxide promotes the methane decomposition reaction to form C + H{sub 2}, which continue to react with Fe{sub 2}O{sub 3}/Fe{sub 3}O{sub 4} to form CO/CO{sub 2} and H{sub 2}O. This mechanism is supported by the characterization studies, which also suggest that the formation of carbonaceous intermediates may affect the reaction rate and selectivity of the oxygen carrier.

  7. DFT+U Study of CeO2 and Its Native Defects

    E-Print Network [OSTI]

    Huang, Bolong; Gillen, Roland; Robertson, John

    2014-10-14T23:59:59.000Z

    in solid state fuel cells2, as a catalyst3-6, as a high-dielectric constant gate oxide7, and in resistance random access memories (ReRAM)8. Many properties of CeO2 are determined by its intrinsic defects9-23 and the unusual behavior of the semi-core Ce 4f... averaging scheme46 for spin- orbital coupling effect. The RRKJ method is chosen as optimization of pseudopotentials47. The PBE functional was chosen for PBE+U calculations with a kinetic cutoff energy of 750eV, which expands the valence electrons states...

  8. Comparative Study on Redox Properties of Nanosized CeO2 and CuO/Ce2 Under CO/O2

    SciTech Connect (OSTI)

    Martinez-Arias,A.; Gamarra, D.; Fernandez-Garcia, M.; Wang, X.; Hanson, J.; Rodriguez, J.

    2006-01-01T23:59:59.000Z

    Nanosized CeO{sub 2} and CuO/CeO{sub 2} samples, active for CO-PROX or related processes were comparatively examined by O{sub 2} probe electron paramagnetic resonance and in situ Raman and X-ray diffraction techniques. Their behavior toward CO reduction, as well as the oxygen-handling properties of the CO-reduced samples, was explored. An appreciable reduction of the ceria bulk was detected on treatment under CO at 473 K. On the basis of the analysis of the evolution of different oxygen-derived species (superoxide, peroxide, O-) on low-temperature (77-300 K) oxygen chemisorption on the CO-reduced samples, a general picture of the redox properties of the samples is presented. Results demonstrate that the presence of copper promotes completion of the redox cycle under CO/O{sub 2} by favoring both ceria reduction and oxidation. This can be relevant to explaining the remarkable oxidation activity and synergetic effects observed for catalysts combining CuO and CeO{sub 2}.

  9. Observation of Strong Resonant Behavior in the Inverse Photoelectron Spectroscopy of Ce Oxide

    SciTech Connect (OSTI)

    Tobin, J G; Yu, S W; Chung, B W; Waddill, G D; Damian, E; Duda, L; Nordgren, J

    2009-12-15T23:59:59.000Z

    X-ray Emission Spectroscopy (XES) and Resonant Inverse Photoelectron Spectroscopy (RIPES) have been used to investigate the photon emission associated with the Ce3d5/2 and Ce3d3/2 thresholds. Strong resonant behavior has been observed in the RIPES of Ce Oxide near the 5/2 and 3/2 edges. Inverse Photoelectron Spectroscopy (IPES) and its high energy variant, Bremstrahlung Isochromat Spectroscopy (BIS), are powerful techniques that permit a direct interrogation of the low-lying unoccupied electronic structure of a variety of materials. Despite being handicapped by counting rates that are approximately four orders of magnitude less that the corresponding electron spectroscopies (Photoelectron Spectroscopy, PES, and X-ray Photoelectron Spectroscopy, XPS) both IPES and BIS have a long history of important contributions. Over time, an additional variant of this technique has appeared, where the kinetic energy (KE) of the incoming electron and photon energy (hv) of the emitted electron are roughly the same magnitude as the binding energy of a core level of the material in question. Under these circumstances and in analogy to Resonant Photoelectron Spectroscopy, a cross section resonance can occur, giving rise to Resonant Inverse Photoelectron Spectroscopy or RIPES. Here, we report the observation of RIPES in an f electron system, specifically the at the 3d{sub 5/2} and 3d{sub 3/2} thresholds of Ce Oxide. The resonant behavior of the Ce4f structure at the 3d thresholds has been addressed before, including studies of the utilization of the technique as a probe of electron correlation in a variety of Ce compounds. Interestingly, the first RIPES work on rare earths dates back to 1974, although under conditions which left the state of the surface and near surface regions undefined. Although they did not use the more modern terminology of 'RIPES,' it is clear that RIPES was actually first performed in 1974 by Liefeld, Burr and Chamberlain on both La and Ce based materials. In these experiments, the La and Ce metallic samples were attached to the anode of an x-ray tube and the x-ray emission characteristics were measured using a two crystal monochromator. The pressure in the x-ray tube was quoted as being below 2 x 10{sup -8} Torr. They did indeed observed resonant behavior at the M{alpha} (3d{sub 5/2}) and M{beta} (3d{sub 3/2}) thresholds. In fact, our results here will confirm the measurements made upon the Ce based sample used in by Liefeld et al. However, the state of the Ce sample surface and near surface regions are quite undefined in the study in Ref 9. For example, the authors suggest that they are probing Ce metal, since they cannot see any evidence of an OK{alpha} (1s) XES line. However, they do report the observation of FK{alpha} (1s) line, possibly due to the utilization of cerium fluoride in the sample preparation. Later, they tried to address these issues in a new ultrahigh vacuum system. Based upon our results, it is clear that their original sample surface was oxidized, using the word here in its more general context as in having lost electrons to the oxidizing agent, although whether the structure is an oxide or fluoride remains unclear. In any case, the primacy of Liefeld and coworkers in these measurements should be noted. Cerium and cerium oxide have been studied with a variety of spectroscopic techniques under UHV conditions. This includes Bremstrahlung Isochromat Spectroscopy or BIS, Photoelectron Spectroscopy, X-ray Absorption Spectroscopy, Electron Energy Loss Spectroscopy and Resonant XES, to name just a few. We will compare our results to those of other spectroscopies.

  10. Overseas Affairs and Planning Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University

    E-Print Network [OSTI]

    Takada, Shoji

    Contact: Overseas Affairs and Planning Institute for Integrated Cell-Material Sciences (i Cell-Material Sciences, iCeMS for short, I welcome you to the Seventh iCeMS International Symposium to develop them through evolution. They are also very important to design and create various novel "smart

  11. Laser Surface Modification of a Crystalline Al-Co-Ce Alloy for Enhanced Corrosion

    E-Print Network [OSTI]

    Fitz-Gerald, James M.

    #12;Laser Surface Modification of a Crystalline Al-Co-Ce Alloy for Enhanced Corrosion Resistance hardness, structure manipula- tion, and improvements in corrosion resistance of metallic materials.[1 surface modify steel and aluminum alloys for improved corrosion resistance.[3,4] The enhanced corrosion

  12. Logiciel de Gestion de Version Qu'est-ce qu'un Version Control System (VCS) ?

    E-Print Network [OSTI]

    Tichit, Laurent

    Logiciel de Gestion de Version Git Qu'est-ce qu'un Version Control System (VCS) ? Appel galement Logiciel de Gestion de Rvision (RCS), un VCS est un outil qui permet de : de suivre l'volution d revenir en arrire en cas de problme ; de retenir qui a effectu chaque modification de chaque fichier

  13. CeSOS Highlights and AMOS Visions 27-29th May 2013 Aurlien Babarit

    E-Print Network [OSTI]

    Nrvg, Kjetil

    2013 Criteria for comparison > The true criterion is cost of kWh. > kWh (power production) can absorption Income side of COE The higher the power absorption per unit, the less the installation cost a limit to the allowed cost for viability #12;A. Babarit CeSOS Highlights and AMOS Visions 27-29th May

  14. COMMENT LES NANOTUBES DE CARBONE INTERAGISSENT AVEC LES MACROPHAGES : CE QUE NOUS DIT LA MICROFLUORESCENCE X

    E-Print Network [OSTI]

    Paris-Sud 11, Université de

    COMMENT LES NANOTUBES DE CARBONE INTERAGISSENT AVEC LES MACROPHAGES : CE QUE NOUS DIT LA. Boczkowski (INSERM). Réf. : Nano Lett. 8 (9), 2659-2663 (2008). Les nanotubes de carbone présentent des utilisée jusqu'alors pour étudier des nanotubes de carbone. Nous avons choisi d'étudier différentes sortes

  15. In situ corrosion analysis of Al-Zn-In-Mg-Ti-Ce sacrificial anode alloy

    SciTech Connect (OSTI)

    Ma Jingling, E-mail: majingling.student@sina.com; Wen Jiuba; Zhai Wenxia; Li Quanan

    2012-03-15T23:59:59.000Z

    The corrosion behaviour of Al-5Zn-0.02In-1Mg-0.05Ti-0.5Ce (wt.%) alloy has been investigated by immersion test, scanning electron microscopy, energy dispersive X-ray detector, electrochemical impedance spectroscopy and electrochemical noise. The results show that there exist different corrosion types of the alloy in 3.5% NaCl solution with the immersion time. At the initial stage of immersion, pitting due to the precipitates predominates the corrosion with a typical inductive loop at low frequencies in electrochemical impedance spectroscopy. The major precipitates of the alloy are MgZn{sub 2} and Al{sub 2}CeZn{sub 2} particles. The corrosion potentials of the bulk MgZn{sub 2} and Al{sub 2}CeZn{sub 2} alloys are negative with respect to that of {alpha}-Al, so the MgZn{sub 2} and Al{sub 2}CeZn{sub 2} precipitates can act as activation centre and cause the pitting. In the late corrosion, a relative uniform corrosion predominates the corrosion process controlled by the dissolution/precipitation of the In ions and characterized by a capacitive loop at medium-high frequencies in electrochemical impedance spectroscopy. The potential noise of the pitting shows larger amplitude fluctuation and lower frequency, but the potential noise of the uniform corrosion occurs with smaller amplitude fluctuation and higher frequency.

  16. The CompuTer SCienCe program The bachelor of science degree in computer science

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    The CompuTer SCienCe program The bachelor of science degree in computer science offered by the Watson School is accredited by the Computing Accreditation Commission of ABET Inc. (mailing address: 111 in the fundamentals of computer science, elements of practical application and an appreciation for liberal learning

  17. Energy Based Methods in Wind Turbine Control CeSOS Highlights and AMOS Visions

    E-Print Network [OSTI]

    Nørvåg, Kjetil

    Energy Based Methods in Wind Turbine Control CeSOS Highlights and AMOS Visions Morten D. Pedersen 1 / 26 #12;This talk 1 Background 2 Understanding the Wind Turbine 3 Nonlinear Turbine Modeling 4;Background The Problem Previously stable wind turbine systems began exhibiting resonant behavior when put

  18. CE990 Graduate Seminar Presentations The presentation materials shown in this file were prepared by graduate

    E-Print Network [OSTI]

    Saskatchewan, University of

    cord · 10% fabric 4 #12;Thermal ConductivityThermal Conductivity · Low thermal conductivity of 0.242W conventional aggregatesconventional aggregates 5 #12;Thermal ConductivityThermal Conductivity ··Shredded tireCE990 Graduate Seminar Presentations DISCLAIMER The presentation materials shown in this file were

  19. Author's personal copy Prepration and photoluminescence properties of Ce doped lutetium silicate

    E-Print Network [OSTI]

    Cao, Guozhong

    Author's personal copy Prepration and photoluminescence properties of Ce doped lutetium silicate silicate Cerium Solegel Photoluminescence Lu2SiO5 a b s t r a c t Cerium doped lutetium silicate powders%). The synthesized lutetium silicate powders were investigated by X-ray diffraction (XRD), TG-DTA, SEM

  20. Unusual Physical and Chemical Properties of Cu in Ce1-xCuxO2 Oxides

    SciTech Connect (OSTI)

    Wang,X.; Rodriguez, J.; Hanson, J.; Gamarra, D.; Martinez-Arias, A.; Fernandez-Garcia, M.

    2005-01-01T23:59:59.000Z

    The structural and electronic properties of Ce{sub 1-x}Cu{sub x}O{sub 2} nano systems prepared by a reverse microemulsion method were characterized with synchrotron-based X-ray diffraction, X-ray absorption spectroscopy, Raman spectroscopy, and density functional calculations. The Cu atoms embedded in ceria had an oxidation state higher than those of the cations in Cu{sub 2}O or CuO. The lattice of the Ce{sub 1-x}Cu{sub x}O{sub 2} systems still adopted a fluorite-type structure, but it was highly distorted with multiple cation-oxygen distances with respect to the single cation-oxygen bond distance seen in pure ceria. The doping of CeO{sub 2} with copper introduced a large strain into the oxide lattice and favored the formation of O vacancies, leading to a Ce{sub 1-x}Cu{sub x}O{sub 2-y} stoichiometry for our materials. Cu approached the planar geometry characteristic of Cu(II) oxides, but with a strongly perturbed local order. The chemical activities of the Ce{sub 1-x}Cu{sub x}O{sub 2} nanoparticles were tested using the reactions with H2 and O2 as probes. During the reduction in hydrogen, an induction time was observed and became shorter after raising the reaction temperature. The fraction of copper that could be reduced in the Ce{sub 1-x}Cu{sub x}O{sub 2} oxides also depended strongly on the reaction temperature. A comparison with data for the reduction of pure copper oxides indicated that the copper embedded in ceria was much more difficult to reduce. The reduction of the Ce{sub 1-x}Cu{sub x}O{sub 2} nanoparticles was rather reversible, without the generation of a significant amount of CuO or Cu{sub 2}O phases during reoxidation. This reversible process demonstrates the unusual structural and chemical properties of the Cu-doped ceria materials.

  1. Phase relations and crystal structures in the system Ce-Ni-Zn at 800 Degree-Sign C

    SciTech Connect (OSTI)

    Malik, Z.; Grytsiv, A. [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Vienna (Austria)] [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Vienna (Austria); Rogl, P., E-mail: peter.franz.rogl@univie.ac.at [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Vienna (Austria); Giester, G. [Institute of Mineralogy and Crystallography, University of Vienna, Althanstrasse 14, A-1090 Vienna (Austria)] [Institute of Mineralogy and Crystallography, University of Vienna, Althanstrasse 14, A-1090 Vienna (Austria)

    2012-10-15T23:59:59.000Z

    Phase relations have been established for the system Ce-Ni-Zn in the isothermal section at 800 Degree-Sign C using electron microprobe analysis and X-ray powder diffraction. Phase equilibria at 800 Degree-Sign C are characterized by a large region for the liquid phase covering most of the Ce-rich part of the diagram, whereas a Zn-rich liquid is confined to a small region near the Zn-corner of the Gibbs triangle. Whereas solubility of Ce in the binary Ni-Zn phases is negligible, mutual solubilities of Ni and Zn at a constant Ce content are large at 800 Degree-Sign C for most Ce-Zn and Ce-Ni compounds. The solid solution Ce(Ni{sub 1-x}Zn{sub x}){sub 5} with the CaCu{sub 5}-type is continuous throughout the entire section and for the full temperature region from 400 to 800 Degree-Sign C. Substitution of Zn by Ni is found to stabilize the structure of CeZn{sub 11} to higher temperatures. At 800 Degree-Sign C Ce(Ni{sub x}Zn{sub 1-x}){sub 11} (0.03{<=}x{<=}0.22) appears as a ternary solution phase. Similarly, a rather extended solution forms for Ce{sub 2}(Ni{sub x}Zn{sub 1-x}){sub 17} (0{<=}x{<=}0.53). Detailed data on atom site occupation and atom parameters were derived from X-ray structure analyses for single crystals of Ce{sub 2+y}(Ni{sub x}Zn{sub 1-x}){sub 17}, y=0.02, x=0.49 (a=0.87541(3), c=1.25410(4) nm; Th{sub 2}Zn{sub 17} type with space group R3{sup Macron }m,R{sub F{sup 2}}=0.018) and Ce(Ni{sub 0.18}Zn{sub 0.82}){sub 11} (a=1.04302(2), c=0.67624(3)nm, BaCd{sub 11} type with space group I4{sub 1}/amd, R{sub F{sup 2}}=0.049). - Graphical abstract: Ce-Ni-Zn isothermal section at 800 Degree-Sign C. Highlights: Black-Right-Pointing-Pointer Phase relations were determined for the system Ce-Ni-Zn in the section at 800 Degree-Sign C. Black-Right-Pointing-Pointer A continuous solid solution Ce(Ni{sub 1-x}Zn{sub x}){sub 5}, 0{<=}x{<=}1, forms between 400 and 800 Degree-Sign C. Black-Right-Pointing-Pointer Zn/Ni substitution stabilizes the ternary phase Ce(Zn{sub 1-x}Ni{sub x}){sub 11}, 0.03{<=}x{<=}0.22, 800 Degree-Sign C. Black-Right-Pointing-Pointer An extended solution forms for Ce{sub 2}(Ni{sub x}Zn{sub 1-x}){sub 17} (0{<=}x{<=}0.53). Black-Right-Pointing-Pointer Crystal data are given: Ce{sub 2+y}(Ni{sub x}Zn{sub 1-x}){sub 17} (Th{sub 2}Zn{sub 17}), Ce(Ni{sub 0.18}Zn{sub 0.82}){sub 11} (BaCd{sub 11}).

  2. Size Effect on Nuclear Gamma-Ray Energy Spectra Acquired by Different Sized CeBr3, LaBr3:Ce, and NaI:Tl Gamma-Ray Detectors

    SciTech Connect (OSTI)

    Guss, Paul [NSTec; Reed, Michael [NSTec; Yuan, Ding [NSTec; Beller, Denis [UNLV; Cutler, Matthew [UNLV; Contreras, Chris [UNLV; Mukhopadhyay, Sanjoy [NSTec; Wilde, Scott UNLV

    2014-03-01T23:59:59.000Z

    Gamma-ray energy spectra were acquired for different sizes of cerium tribromide (CeBr3), cerium-doped lanthanum tribromide (LaBr3:Ce), and thallium-doped sodium iodide (NaI:Tl) detectors. A comparison was conducted of the energy resolution and detection efficiency of these scintillator detectors for different sizes of detectors. The results of this study are consistent with the observation that for each size detector, LaBr3:Ce offers better resolution than either a CeBr3 or NaI:Tl detector of the same size. In addition, CeBr3 and LaBr3:Ce detectors could resolve some closely spaced peaks in the spectra of several radioisotopes that NaI:Tl could not. As the detector size increased, all three detector materials exhibited higher efficiency, albeit with slightly reduced resolution. Significantly, the very low intrinsic activity of CeBr3 is also demonstrated in this study, which, when combined with energy resolution characteristics for a range of detector sizes, could lead to an improved ability to detect special nuclear materials compared to the other detectors.

  3. Data:678ce1a9-73c5-4299-aa54-b70f702c53ce | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approvedea02758d3 No revision has1574de6f No revisionb70f702c53ce No revision has

  4. Data:Ce155644-3dbb-44ce-80f8-79eb97a58f0a | Open Energy Information

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved for this page. It

  5. WESEP 594 Seminar Sri Sritharan

    E-Print Network [OSTI]

    McCalley, James D.

    Research · Anything else? #12;My Research program (2000 to 2009) #12;My Involvement in Wind Energy · Wind? · My Background · Education · Work Experience · History at ISU Jan. 2000 to present Teaching Service Energy initiative (http://www.engineering.iastate.edu/wei) · Design of Tall Towers Must withstand large

  6. SRI2007 Conference - Contact Information

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

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  7. SRI2007 Conference - Local Attractions

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  8. SRI2007 Conference - Manuscript Review

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  9. SRI2007 Conference - Poster Session

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  10. SRI2007 Conference - Travel Tips

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  11. Photoemission Spectroscopy at SRI2013

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006 TheStevenAdministration AlbumCoulomb repulsionTrimer.

  12. SRI International | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to: navigation, searchVirginiaRooseveltVI Solar Power Plant Jump

  13. Methane Combustion over Pd/ZrO2/SiC, Pd/CeO2/SiC, Pd/Zr0.5Ce0.5O2/SiC Catalysts

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Methane Combustion over Pd/ZrO2/SiC, Pd/CeO2/SiC, Pd/Zr0.5Ce0.5O2/SiC Catalysts Xiaoning Guo a Laboratory of Coal Conversion, Institute of Coal Chemistry, Taiyuan 030001, PR China b GREMI UMR6606 CNRS0.5O2 solid solution) modified Pd/SiC catalysts for methane combustion are studied. XRD and XPS

  14. Scintillation properties of some Ce[sup 3+] and Pr[sup 3+] doped inorganic crystals

    SciTech Connect (OSTI)

    Dorenbos, P.; Visser, R.; Eijk, C.W.E. van (Delft Univ. of Technology (Netherlands). Dept. of Applied Physics); Khaidukov, N.M. (N.S. Kurnakov Inst. of General and Inorganic Chemistry, Moscow (Russian Federation)); Korzhik, M.V. (Inst. of Nuclear Problems, Minsk (Russian Federation))

    1993-08-01T23:59:59.000Z

    The scintillations properties of Ce[sup 3+] and Pr[sup 3+] doped complex fluoride crystals of composition CsGd[sub 2]F[sub 7] and K[sub 2]YF[sub 5] and of Pr[sup 3+] doped Y[sub 3]Al[sub 5]O[sub 12] single crystals were studied by means of x-ray and gamma ray excitation. The Ce[sub 3+] and Pr[sub 3+] doped fluoride crystals show 5d-4f luminescences at wavelengths near 340 nm and 240 nm, respectively. 5d-4f luminescence of Pr[sup 3+] doped Y[sub 3]Al[sub 5]O[sub 12] is observed between 300 and 400 nm. The authors present the absolute light yield in photons/MeV together with results from scintillation decay time experiments.

  15. Magnetization switching of rare earth orthochromite CeCrO{sub 3}

    SciTech Connect (OSTI)

    Cao, Yiming; Cao, Shixun, E-mail: sxcao@shu.edu.cn; Ren, Wei; Feng, Zhenjie; Yuan, Shujuan; Kang, Baojuan; Zhang, Jincang [Department of Physics, Shanghai University, Shanghai 200444 (China); Lu, Bo [Laboratory for Microstructures, Shanghai University, Shanghai 200444 (China)

    2014-06-09T23:59:59.000Z

    We report the synthesis of single phase rare earth orthochromite CeCrO{sub 3} and its magnetic properties. A canted antiferromagnetic transition with thermal hysteresis at T?=?260?K is observed, and a magnetic compensation (zero magnetization) near 133?K is attributed to the antiparallel coupling between Ce{sup 3+} and Cr{sup 3+} moments. At low temperature, field induced magnetization reversal starting from 43?K for H?=?1.2 kOe reveals the spin flip driven by Zeeman energy between the net moments and the applied field. These findings may find potential uses in magnetic switching devices such as nonvolatile magnetic memory which facilitates two distinct states of magnetization.

  16. Josephson effect in CeCoIn{sub 5} microbridges as seen via quantum interferometry

    SciTech Connect (OSTI)

    Foyevtsov, Oleksandr; Porrati, Fabrizio; Huth, Michael [Physikalisches Institut, Goethe University, Frankfurt am Main, 60438 (Germany)

    2011-07-15T23:59:59.000Z

    A superconducting quantum interference device (SQUID) was prepared on a micron-sized single crystal using a selected growth domain of a thin film of CeCoIn{sub 5} grown by molecular beam epitaxy. SQUID voltage oscillations of good quality were obtained as well as interference effects stemming from the individual Josephson microbridges. The transport characteristics in the superconducting state exhibited several peculiarities which we ascribe to the periodic motion of vortices in the microbridges. The temperature dependence of the Josephson critical current shows good correspondence to the Ambegaokar-Baratoff relation, expected for the ideal Josephson junction. The results indicate a promising pathway to identify the type of order parameter in CeCoIn{sub 5} by means of phase-sensitive measurements on microbridges.

  17. Investigation into Nanostructured Lanthanum Halides and CeBr{sub 3} for Nuclear Radiation Detection

    SciTech Connect (OSTI)

    Guss, P., Guise, R., Mukhopadhyay, S., Yuan, D.

    2011-06-22T23:59:59.000Z

    This slide-show presents work on radiation detection with nanostructured lanthanum halides and CeBr{sub 3}. The goal is to extend the gamma energy response on both low and high-energy regimes by demonstrating the ability to detect low-energy x-rays and relatively high-energy activation prompt gamma rays simultaneously using the nano-structured lanthanum bromide, lanthanum fluoride, cerium bromide, or other nanocrystal material. Homogeneous and nano structure cases are compared.

  18. Synthesis of Transient Climate Evolution of the last 21-kyr (SynTraCE-21)

    SciTech Connect (OSTI)

    Zhengyu Liu

    2011-05-06T23:59:59.000Z

    Climate evolution in the last 21,000 years provides critical observations for testing state-of-the-art climate models on the simulation of climate evolution and abrupt climate changes. Proxy evidences and new modeling activities have led to rapid advances in our understanding of climate change for this past time period. This funding helps to support the first international SynTraCE-21k workshop at Mount Hood, Oregon from 10-13 October, 2010.

  19. Luminescence Enhancement of CdTe Nanostructures in LaF3:Ce/CdTe Nanocomposites

    SciTech Connect (OSTI)

    Yao, Mingzhen; Zhang, Xing; Ma, Lun; Chen, Wei; Joly, Alan G.; Huang, Jinsong; Wang, Qingwu

    2010-11-15T23:59:59.000Z

    Radiation detection demands new scintillators with high quantum efficiency, high energy resolution and short luminescence lifetimes. Nanocomposites consisting of quantum dots and Ce3+ doped nanophosphors may be able to meet these requirements. Here we report the luminescence of LaF3:Ce/CdTe nanocomposites which were synthesized by a wet chemistry method. In LaF3:Ce/CdTe nanocomposites the CdTe quantum dots are converted into nanowires, while in LaF3/CdTe nanocomposites no such conversion is observed. The CdTe luminescence in LaF3:Ce/CdTe nanocomposites is enhanced about 5 times, while in LaF3/CdTe nanocomposites no enhancement was observed. Energy transfer, light-re-absorption and surface passivation are likely the reasons for the luminescence enhancement.

  20. A dipole polarizable potential for reduced and doped CeO[subscript 2] obtained from first principles

    E-Print Network [OSTI]

    Burbano, Mario

    In this paper we present the parameterization of a new interionic potential for stoichiometric, reduced and doped CeO[subscript 2]. We use a dipole polarizable potential (DIPPIM: the dipole polarizable ion model) and ...

  1. Impact of the CE mark approval on exit opportunities and validation for early stage medical device companies

    E-Print Network [OSTI]

    Kothari, Ashish (Ashish Shrikant)

    2011-01-01T23:59:59.000Z

    The aim of this thesis was to look at the impact of acquiring the CE marking approval on the outcome of early stage medical device companies, specifically its impact on strategic acquisition opportunities and on valuation. ...

  2. Adsorption and Reaction of C1-C3 Alcohols over CeOx(111) Thin Films

    SciTech Connect (OSTI)

    D Mullins; S Senanayake; T Chen

    2011-12-31T23:59:59.000Z

    This study reports the interaction of methanol, ethanol, 1-propanol, and 2-propanol with well-ordered CeO{sub 2}(111) thin film surfaces. All of the alcohols adsorb at low temperature by forming alkoxy and hydroxyl species on the surface. On fully oxidized CeO{sub 2}(111), recombination occurs between some of the alkoxys and hydroxyls, resulting in alcohol desorption near 220 K. At the same temperature, some of the surface hydroxyls disproportionate to produce water and the loss of lattice O. The remaining alkoxys react above 550 K. The primary alcohols favor dehydrogenation products (aldehydes). There is a net loss of O from the system, resulting in a reduction of the ceria. The secondary alcohol, 2-propanol, undergoes primarily dehydration, producing propene with no net change in the cerium oxidation state. Reduced CeO{sub x}(111) competes with the gaseous products for available O. Little or no water is produced. The reaction selectivity for the C{sub 2} and C{sub 3} alcohols shifts toward favoring dehydration products. The loss of O from the alcohols leads to oxidation of the reduced ceria. Compared with the oxidized surface, the alkene desorption shifts to lower temperature, whereas the aldehyde desorption shifts to higher temperature. This indicates that, on the reduced surface, it is easier to break the C-O bond but more difficult to break the O-substrate bond.

  3. Morphological and Structural Changes During the Reduction and Reoxidation of CuO/CeO(2) and Ce(1-x)Cu(x)O(2) Nanocatalysts: In-situ Studies with Environmental TEM, XRD and XAS

    SciTech Connect (OSTI)

    Rodriguez, J.A.; Ciston, J.; Si, R.; Hanson, J.C.; Martnez-Arias, A.; Fernandez-Garca, M.; Zhu, Y.

    2011-07-21T23:59:59.000Z

    We have studied the structural, morphological, and electronic properties of CuO/CeO{sub 2} and Ce{sub 1-x}Cu{sub x}O{sub 2} nanocatalysts during reduction/oxidation cycles using H{sub 2} and O{sub 2} as chemical probes. Time-resolved in situ characterization was performed by X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) as well as aberration-corrected environmental transmission electron microscopy (ETEM). We have found that both types of nanocatalysts reduce to a Cu/CeO{sub 2} biphase system with significant oxygen vacancies in CeO{sub 2}. Important variations are seen in the Cu particle size and metal dispersion depending on the initial state of the copper oxide-ceria systems. During subsequent in situ oxygen annealing, the Cu precipitated from the CuO/CeO{sub 2} system reoxidized to form CuO through a Cu{sub 2}O intermediate phase as expected. However, the Cu precipitated from the Ce{sub 0.8}Cu{sub 0.2}O{sub 2} solid solution behaved rather differently under oxidizing conditions, and neither oxidized to form CuO nor fully returned to a bulk Ce{sub 0.8}Cu{sub 0.2}O{sub 2} phase in solid solution. We found that {approx} 50% of the Cu returned to a Ce{sub 1-x}Cu{sub x}O{sub 2} solid solution, while the remainder was observed by in situ ETEM to form an amorphous copper oxide phase with a Cu oxidation state similar to Ce{sub 1-x}Cu{sub x}O{sub 2}, but with a local bonding environment similar to CuO. The behavior of the reduced Ce{sub 0.8}Cu{sub 0.2}O{sub 2} reflects strong interactions between Cu and the ceria matrix and illustrates the advantages of working with solid solutions of mixed oxides.

  4. Morphological and Structural Changes during the Reduction and Reoxidation of CuO/CeO2 and Ce1-xCuxO2 Nanocatalysts: In Situ Studies with Environmental TEM XRD and XAS

    SciTech Connect (OSTI)

    J Ciston; R Si; J Rodriquez; J Hanson; A Martinez-Arias; M Fernandez-Garcia; Y Zhu

    2011-12-31T23:59:59.000Z

    We have studied the structural, morphological, and electronic properties of CuO/CeO{sub 2} and Ce{sub 1-x}Cu{sub x}O{sub 2} nanocatalysts during reduction/oxidation cycles using H2 and O2 as chemical probes. Time-resolved in situ characterization was performed by X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) as well as aberration-corrected environmental transmission electron microscopy (ETEM). We have found that both types of nanocatalysts reduce to a Cu/CeO{sub 2} biphase system with significant oxygen vacancies in CeO{sub 2}. Important variations are seen in the Cu particle size and metal dispersion depending on the initial state of the copper oxide-ceria systems. During subsequent in situ oxygen annealing, the Cu precipitated from the CuO/CeO{sub 2} system reoxidized to form CuO through a Cu2O intermediate phase as expected. However, the Cu precipitated from the Ce{sub 0.8}Cu{sub 0.2}O{sub 2} solid solution behaved rather differently under oxidizing conditions, and neither oxidized to form CuO nor fully returned to a bulk Ce{sub 0.8}Cu{sub 0.2}O{sub 2} phase in solid solution. We found that 50% of the Cu returned to a Ce{sub 1-x}Cu{sub x}O{sub 2} solid solution, while the remainder was observed by in situ ETEM to form an amorphous copper oxide phase with a Cu oxidation state similar to Ce{sub 1-x}Cu{sub x}O{sub 2}, but with a local bonding environment similar to CuO. The behavior of the reduced Ce{sub 0.8}Cu{sub 0.2}O{sub 2} reflects strong interactions between Cu and the ceria matrix and illustrates the advantages of working with solid solutions of mixed oxides.

  5. High thermoelectric performance of In, Yb, Ce multiple filled CoSb{sub 3} based skutterudite compounds

    SciTech Connect (OSTI)

    Ballikaya, Sedat [Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey) [Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey); Department of Physics, University of Michigan, Ann Arbor, MI, 48109 (United States); Uzar, Neslihan; Yildirim, Saffettin [Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey)] [Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey); Salvador, James R. [Chemical Sci. and Mater. Systems Laboratory, General Motors Global R and D Center, Warren, MI 48090 (United States)] [Chemical Sci. and Mater. Systems Laboratory, General Motors Global R and D Center, Warren, MI 48090 (United States); Uher, Ctirad, E-mail: cuher@umich.edu [Department of Physics, University of Michigan, Ann Arbor, MI, 48109 (United States)] [Department of Physics, University of Michigan, Ann Arbor, MI, 48109 (United States)

    2012-09-15T23:59:59.000Z

    Filling voids with rare earth atoms is an effective way to lowering thermal conductivity which necessarily enhances thermoelectric properties of skutterudite compounds. Yb atom is one of the most effective species among the rare earth atoms for filling the voids in the skutterudite structure due to a large atomic mass, radius and it is intermediate valence state. In this work, we aim to find the best filling partners for Yb using different combinations of Ce and In as well as to optimize actual filling fraction in order to achieve high values of ZT. The traditional method of synthesis relying on melting-annealing and followed by spark plasma sintering was used to prepare all samples. The thermoelectric properties of four samples of Yb{sub 0.2}In{sub 0.2}Co{sub 4}Sb{sub 12}, Yb{sub 0.2}Ce{sub 0.15}Co{sub 4}Sb{sub 12}, Yb{sub 0.2}Ce{sub 0.15}In{sub 0.2}Co{sub 4}Sb{sub 12}, and Yb{sub 0.3}Ce{sub 0.15}In{sub 0.2}Co{sub 4}Sb{sub 12} (nominal) were examined based on the Seebeck coefficient, electrical conductivity, thermal conductivity, and Hall coefficient. Hall coefficient and Seebeck coefficient signs confirm that all samples are n-type skutterudite compounds. Carrier density increases with the increasing Yb+Ce content. A high power factor value of 57.7 {mu}W/K{sup 2}/cm for Yb{sub 0.2}Ce{sub 0.15}Co{sub 4}Sb{sub 12} and a lower thermal conductivity value of 2.82 W/m/K for Yb{sub 0.2}Ce{sub 0.15}In{sub 0.2}Co{sub 4}Sb{sub 12} indicate that small quantities of Ce with In may be a good partner to Yb to reduce the thermal conductivity further and thus enhance the thermoelectric performance of skutterudites. The highest ZT value of 1.43 was achieved for Yb{sub 0.2}Ce{sub 0.15}In{sub 0.2}Co{sub 4}Sb{sub 12} triple-filled skutterudite at 800 K. - Graphical abstract: Thermoelectric figure of merit of Yb{sub x}In{sub y}Ce{sub z}Co{sub 4}Sb{sub 12} (0{<=}x,y,z{<=}0.18 actual) compounds versus temperature. Highlights: Black-Right-Pointing-Pointer TE properties of Yb,In,Ce multiple-filled Yb{sub x}In{sub y}Ce{sub z}Co{sub 4}Sb{sub 12} skutterudites were investigated. Black-Right-Pointing-Pointer Thermal conductivity is strongly suppressed by multiple filling of Yb, Ce and In. Black-Right-Pointing-Pointer Small amounts of Ce and In with Yb are beneficial for the enhancement of TE performance. Black-Right-Pointing-Pointer The highest ZT=1.43 was achieved with Yb{sub 0.07}In{sub 0.094}Ce{sub 0.065}Co{sub 4}Sb{sub 11.92} at 800 K.

  6. Rationalization of the Hubbard U parameter in CeO{sub x} from first principles: Unveiling the role of local structure in screening

    SciTech Connect (OSTI)

    Lu, Deyu, E-mail: dlu@bnl.gov, E-mail: pingliu3@bnl.gov; Liu, Ping, E-mail: dlu@bnl.gov, E-mail: pingliu3@bnl.gov [Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973 (United States)] [Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973 (United States)

    2014-02-28T23:59:59.000Z

    The density functional theory (DFT)+U method has been widely employed in theoretical studies on various ceria systems to correct the delocalization bias in local and semi-local DFT functionals with moderate computational cost. We present a systematic and quantitative study, aiming to gain better understanding of the dependence of Hubbard U on the local atomic arrangement. To rationalize the Hubbard U of Ce 4f, we employed the first principles linear response method to compute Hubbard U for Ce in ceria clusters, bulks, and surfaces. We found that the Hubbard U varies in a wide range from 4.3 eV to 6.7 eV, and exhibits a strong correlation with the Ce coordination number and CeO bond lengths, rather than the Ce 4f valence state. The variation of the Hubbard U can be explained by the changes in the strength of local screening due to O ? Ce intersite transitions.

  7. DOI-BLM-ID-110-2009-3825-CE | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergyMasse) JumpConsultation-2009-3825-CE Jump to:

  8. XRD, lead equivalent and UV-VIS properties study of Ce and Pr lead silicate glasses

    SciTech Connect (OSTI)

    Alias, Nor Hayati, E-mail: norhayati@nuclearmalaysia.gov.my; Abdullah, Wan Shafie Wan, E-mail: norhayati@nuclearmalaysia.gov.my; Isa, Norriza Mohd, E-mail: norhayati@nuclearmalaysia.gov.my; Isa, Muhammad Jamal Md, E-mail: norhayati@nuclearmalaysia.gov.my; Zali, Nurazila Mat; Abdullah, Nuhaslinda Ee [Malaysian Nuclear Agency, 43000, Bangi, Kajang, Selangor (Malaysia); Muhammad, Azali [Malaysian Society for Non-Destructive Testing (Malaysia)

    2014-02-12T23:59:59.000Z

    In this work, Cerium (Ce) and Praseodymium (Pr) containing lead silicate glasses were produced with 2 different molar ratios low (0.2 wt%) and high (0.4wt%). These types of glasses can satisfy the characteristics required for radiation shielding glasses and minimize the lead composition in glass. The radiation shielding properties of the synthesized glasses is explained in the form of lead equivalent study. The XRD diffraction and UV-VIS analysis were performed to observe the structural changes of the synthesis glasses at 1.5 Gy gamma radiation exposures.

  9. Data:46440396-c64b-4541-ad0a-43775ce1671b | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b No revisione66e17fc7f7 No revisione18fe97c No revision has been approved for775ce1671b

  10. Probing the Reaction Intermediates for the Water-Gas Shift over Inverse CeOx/Au(111) Catalysts

    SciTech Connect (OSTI)

    Rodriguez, J.A.; Senanayake, S.D.; Stacchiola, D.; Evans, J.; Estrella, M.; Barrio-Pliego, L.; Prez, M.; Hrbek, J.

    2010-05-04T23:59:59.000Z

    The water-gas shift (WGS) is an important reaction for the production of molecular H{sub 2} from CO and H{sub 2}O. An inverse CeO{sub x}/Au(1 1 1) catalyst exhibits a very good WGS activity, better than that of copper surfaces or Cu nanoparticles dispersed on a ZnO(0 0 0 {bar 1}) substrate which model current WGS industrial catalysts. In this work we report on intermediates likely to arise during the CO + H{sub 2}O reaction over CeO{sub x}/Au(1 1 1) using soft X-ray photoemission (sXPS) and near-edge X-ray absorption fine structure (NEXAFS). Several potential intermediates including formates (HCOO), carbonates (CO{sub 3}) and carboxylates (HOCO) are considered. Adsorption of HCOOH and CO{sub 2} is used to create both HCOO and CO{sub 3} on the CeO{sub x}/Au(1 1 1) surface, respectively. HCOO appears to have greater stability with desorption temperatures up to 600 K while CO{sub 3} only survives on the surface up to 300 K. On the CeO{sub x}/Au(1 1 1) catalysts, the presence of Ce{sup 3+} leads to the dissociation of H{sub 2}O to give OH groups. We demonstrate experimentally that the OH species are stable on the surface up to 600 K and interact with CO to yield weakly bound intermediates. When there is an abundance of Ce{sup 4+}, the OH concentration is diminished and the likely intermediates are carbonates. As the surface defects are increased and the Ce{sup 3+}/Ce{sup 4+} ratio grows, the OH concentration also grows and both carbonate and formate species are observed on the surface after dosing CO to H{sub 2}O/CeO{sub x}/Au(1 1 1). The addition of ceria nanoparticles to Au(1 1 1) is essential to generate an active WGS catalyst and to increase the production and stability of key reaction intermediates (OH, HCOO and CO{sub 3}).

  11. Probing the Reaction Intermediates for the Watergas Shift over Inverse CeOx / Au(1 1 1) Catalysts

    SciTech Connect (OSTI)

    Senanayake, S.; Stacchiola, D; Evans, J; Estrella, M; Barrio, L; Perez, M; Hrbek, J; Rodriguez, J

    2010-01-01T23:59:59.000Z

    The water-gas shift (WGS) is an important reaction for the production of molecular H{sub 2} from CO and H{sub 2}O. An inverse CeO{sub x}/Au(1 1 1) catalyst exhibits a very good WGS activity, better than that of copper surfaces or Cu nanoparticles dispersed on a ZnO(0 0 0 {bar 1}) substrate which model current WGS industrial catalysts. In this work we report on intermediates likely to arise during the CO + H{sub 2}O reaction over CeO{sub x}/Au(1 1 1) using soft X-ray photoemission (sXPS) and near-edge X-ray absorption fine structure (NEXAFS). Several potential intermediates including formates (HCOO), carbonates (CO{sub 3}) and carboxylates (HOCO) are considered. Adsorption of HCOOH and CO{sub 2} is used to create both HCOO and CO{sub 3} on the CeO{sub x}/Au(1 1 1) surface, respectively. HCOO appears to have greater stability with desorption temperatures up to 600 K while CO{sub 3} only survives on the surface up to 300 K. On the CeO{sub x}/Au(1 1 1) catalysts, the presence of Ce{sup 3+} leads to the dissociation of H{sub 2}O to give OH groups. We demonstrate experimentally that the OH species are stable on the surface up to 600 K and interact with CO to yield weakly bound intermediates. When there is an abundance of Ce{sup 4+}, the OH concentration is diminished and the likely intermediates are carbonates. As the surface defects are increased and the Ce{sup 3+}/Ce{sup 4+} ratio grows, the OH concentration also grows and both carbonate and formate species are observed on the surface after dosing CO to H{sub 2}O/CeO{sub x}/Au(1 1 1). The addition of ceria nanoparticles to Au(1 1 1) is essential to generate an active WGS catalyst and to increase the production and stability of key reaction intermediates (OH, HCOO and CO{sub 3}).

  12. X-ray luminescence of CdTe quantum dots in LaF{sub 3}:Ce/CdTe nanocomposites

    SciTech Connect (OSTI)

    Hossu, Marius; Liu Zhongxin; Yao Mingzhen; Ma Lun; Chen Wei

    2012-01-02T23:59:59.000Z

    CdTe quantum dots have intense photoluminescence but exhibit almost no x-ray luminescence. However, intense x-ray luminescence from CdTe quantum dots is observed in LaF{sub 3}:Ce/CdTe nanocomposites. This enhancement in the x-ray luminescence of CdTe quantum dots is attributed to the energy transfer from LaF{sub 3}:Ce to CdTe quantum dots in the nanocomposites. The combination of LaF{sub 3}:Ce nanoparticles and CdTe quantum dots makes LaF{sub 3}:Ce/CdTe nanocomposites promising scintillators for radiation detection.

  13. Grant Title: RESEARCH GRANTS FOR PREVENTING VIOLENCE AND VIOLENCE-RELATED INJURY Funding Opportunity Number: RFA-CE-14-006. CFDA Number(s): 93.136.

    E-Print Network [OSTI]

    Farritor, Shane

    Opportunity Number: RFA-CE-14-006. CFDA Number(s): 93.136. Agency/Department: Centers for Disease Control

  14. Nickel deficiency in RENi2-xP2 (RE=La, Ce, Pr). Combined crystallographic and physical property studies

    SciTech Connect (OSTI)

    Bauer, Eric D [Los Alamos National Laboratory; Ronning, Filip [Los Alamos National Laboratory; Thompson, Joe D [Los Alamos National Laboratory; Sarrao, John L [Los Alamos National Laboratory; Bobev, S [U. OF DE; Xia, S [U. OF DE

    2008-01-01T23:59:59.000Z

    Large single crystals from RENi{sub 2-x}P{sub 2} (RE = La, Ce, Pr) were synthesized from the pure elements using Sn as a metal flux, and their structures were established by X-ray crystallography. The title compounds were confirmed to crystallize in the body-centered tetragonal ThCr{sub 2}Si{sub 2} structure type (space group I4/mmm (No. 139); Pearson's symbol tI10), but with a significant stoichiometry breadth with respect to the transition metal. Systematic synthetic work, coupled with accurate structure refinements indicated strong correlation between the degree of Ni-deficiency and the reaction conditions. For four different PrNi{sub 2-x}P{sub 2} (x {le} 0.5) samples, temperature dependent dc magnetization measurements indicated typical local moment 4f-magnetism and a stable Pr{sup 3+} ground state. Field-dependent heat capacity data confirmed a ferromagnetic order at low temperature, and the variations of T{sub c} with the concentration of Ni defects are discussed. LaNi{sub 2-x}P{sub 2}, as expected was found to be Pauli-like paramagnetic in the studied temperature regime, while the Ce-analog CeNi{sub 2-x}P{sub 2} (x = 0.28(1)) showed the characteristics of a mixed valent Ce{sup 3+}/Ce{sup 4+} system with a possible Kondo temperature on the order of 230 K.

  15. Implementation of the SAM-CE Monte Carlo benchmark analysis capability for validating nuclear data and reactor design codes

    SciTech Connect (OSTI)

    Beer, M.; Rose, P.

    1981-04-01T23:59:59.000Z

    The National Nuclear Data Center is continuing its program to improve the nuclear data base used as input for commercial reactor analysis and design. In the most recent phase of this project the Monte Carlo program SAM-CE, developed by the Mathematical Applications Group, Inc. (MAGI), was made operational at BNL. This program was implemented on the BNL-CDC-7600 Computer, and also on the PDP-10 in-house computer. The NNDC made operational and developed techniques for processing ENDF/B-V cross sections for SAM-CE. A limited ENDF/B-V based library was produced. Use of the SAM-CE program in thermal reactor problems was validated using detailed comparisons of results with other Monte Carlo codes such as RECAP, RCP01 and VIM as well as with experimental data.

  16. On the local electronic and atomic structure of Ce{sub 1?x}Pr{sub x}O{sub 2??} epitaxial films on Si

    SciTech Connect (OSTI)

    Niu, Gang, E-mail: gang@ihp-microelectronics.com; Schubert, Markus Andreas; Zoellner, Marvin Hartwig [IHP, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany); D'Acapito, Francesco [Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, Operative Group in Grenoble, c/o European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble (France); Schroeder, Thomas [IHP, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany); BTU Cottbus-Senftenberg, Konrad-Zuse-Str. 1, 03046 Cottbus (Germany); Boscherini, Federico [Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, Operative Group in Grenoble, c/o European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble (France); Department of Physics and Astronomy, University of Bologna, via le C. Berti Pichat 6/2, 40127 Bologna (Italy)

    2014-09-28T23:59:59.000Z

    The local electronic and atomic structure of (111)-oriented, single crystalline mixed Ce{sub 1?x}Pr{sub x}O{sub 2??} (x?=?0, 0.1 and 0.6) epitaxial thin films on silicon substrates have been investigated in view of engineering redox properties of complex oxide films. Non-destructive X-ray absorption near edge structure reveals that Pr shows only +3 valence and Ce shows only nominal +4 valence in mixed oxides. Extended x-ray absorption fine structure (EXAFS) studies were performed at K edges of Ce and Pr using a specially designed monochromator system for high energy measurements. They demonstrate that the fluorite lattice of ceria (CeO{sub 2}) is almost not perturbed for x?=?0.1 sample, while higher Pr concentration (x?=?0.6) not only generates a higher disorder level (thus more disordered oxygen) but also causes a significant reduction of CeO interatomic distances. The valence states of the cations were also examined by techniques operating in highly reducing environments: scanning transmission electron microscopy-electron energy loss spectroscopy and X-ray photoemission spectroscopy; in these reducing environments, evidence for the presence of Ce{sup 3+} was clearly found for the higher Pr concentration. Thus, the introduction of Pr{sup 3+} into CeO{sub 2} strongly enhances the oxygen exchange properties of CeO{sub 2}. This improved oxygen mobility properties of CeO{sub 2} are attributed to the lattice disorder induced by Pr mixing in the CeO{sub 2} fluorite lattice, as demonstrated by EXAFS measurements. Thus, a comprehensive picture of the modifications of the atomic and electronic structure of Ce{sub 1?x}Pr{sub x}O{sub 2??} epitaxial films and their relation is obtained.

  17. 456 IEEE TRANSACTIONS ON ROBOTICS, VOL. 24, NO. 2, APRIL 2008 the PA10-6CE utilizing the geometric and flexibility calibration method

    E-Print Network [OSTI]

    456 IEEE TRANSACTIONS ON ROBOTICS, VOL. 24, NO. 2, APRIL 2008 the PA10-6CE utilizing the geometric for demanding dynamic ap- plications with the PA10-6CE robot arm. ACKNOWLEDGMENT The authors thank N. Mauntler in robot joints with harmonic drives and torque sensors," Int. J. Robot. Res., vol. 16, no. 2, pp. 214­ 239

  18. The University of Florida Dean of Students O ce creates a culture of care for students, their families, faculty and sta by providing exemplary

    E-Print Network [OSTI]

    Roy, Subrata

    The University of Florida Dean of Students O ce creates a culture of care for students. Develop an inclusive physical environment for Veteran services and resources. Focus energy towards 2012. Complete and implement recommendations from the O ce of Audit & Compliance Review internal audit

  19. The effect of Au and Ni doping on the heavy fermion state of the Kondo lattice antiferromagnet CePtZn

    SciTech Connect (OSTI)

    Dhar, S. K., E-mail: sudesh@tifr.res.in [DCMPMS, T.I.F.R., Homi Bhabha Road, Colaba, Mumbai 400005 (India); Aoki, Y.; Suemitsu, B.; Miyazaki, R. [Department of Physics, Tokyo Metropolitan University, Minami-Ohsawa 1-1, Hachioji-Shi, Tokyo (Japan); Provino, A.; Manfrinetti, P. [Departimento Physica Chemicale, Universita di Genova, Via Dodecaneso, 16146 Genova (Italy)

    2014-05-07T23:59:59.000Z

    We have probed the effect of doping CePtZn with Au and Ni and also investigated in detail the magnetic behavior of the iso-structural CeAuZn. A magnetic ground state is observed in both CePt{sub 0.9}Au{sub 0.1}Zn and CePt{sub 0.9}Ni{sub 0.1}Zn with T{sub N}?=?2.1 and 1.1?K and the coefficient of the linear term of electronic heat capacity ??=?0.34 and 0.9?J/mol K{sup 2}, respectively. The corresponding values for CePtZn are 1.7?K and 0.6?J/mol K{sup 2}. The altered values of T{sub N} and ? show that the electronic correlations in CePtZn are affected by doping with Au and Ni. CeAuZn orders magnetically near 1.7?K and its electrical resistivity shows a normal metallic behavior. Together with a ? of 0.022?J/mol K{sup 2} the data indicate a weak 4f-conduction electron hybridization in CeAuZn characteristic of normal trivalent cerium based systems.

  20. \\\\Ce_equine3\\public\\Cheryl\\WebDocuments\\OnLine\\CCYouthNomForm.doc NEW HAMPSHIRE 4-H CURRICULUM COMMITTEE

    E-Print Network [OSTI]

    New Hampshire, University of

    \\\\Ce_equine3\\public\\Cheryl\\WebDocuments\\OnLine\\CCYouthNomForm.doc NEW HAMPSHIRE 4-H CURRICULUM, including this year? #12;\\\\Ce_equine3\\public\\Cheryl\\WebDocuments\\OnLine\\CCYouthNomForm.doc 2. List and structure of 4-H (service, training, background, etc.) 4. What special attributes does this youth have

  1. Momentum transfer driven textural changes of CeO{sub 2} thin films

    SciTech Connect (OSTI)

    Van Steenberge, S., E-mail: sigelinde.vansteenberge@ugent.be; Leroy, W. P.; Depla, D. [Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, 9000 Ghent (Belgium); Hubin, A. [Department of Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels (Belgium)

    2014-09-15T23:59:59.000Z

    The influence of the target erosion depth on the film texture was investigated during DC reactive magnetron sputter deposition of CeO{sub 2} thin films. Three fluxes towards the substrate surface (the relative negative oxygen ion flux, the material flux, and the energy flux) were measured and related to the ongoing erosion of a cerium target. As the deposition rate increased for more eroded targets, both the energy flux and the negative ion flux decreased. Cerium oxide thin films that were deposited at different target erosion states, exhibited a change in preferential crystalline orientation from [200] to [111]. This textural change cannot be explained in terms of the energy per arriving atom concept. Instead, it is shown that the momentum of the high energetic negative ions is an essential condition to clarify the witnessed trends.

  2. Preparation, crystallography, magnetic and magnetothermal properties of Ce5SiGe4-x alloys

    SciTech Connect (OSTI)

    Vijayaraghavan, Rangarajan

    2005-05-01T23:59:59.000Z

    An investigation of the crystal structure and the phase relationships in the Ce{sub 5}Si{sub 4-x}Ge{sub x} system has been carried out. The crystal structures of the single phase intermetallics were characterized using X-ray powder diffraction and subsequent refinement employing the Rietveld analysis technique was performed. The intermetallic system was found to crystallize in three distinct crystal structures. The Ce{sub 5}Si{sub 4}-based solid solution extends from x = 0 to x = 2.15 and it was found to crystallize in the well-known Zr{sub 5}Si{sub 4}-type tetragonal structure. The germanium rich alloys, where 3.1 {le} x {le} 4, crystallized in the Sm{sub 5}Ge{sub 4}-type orthorhombic structure. The crystal structure of the intermediate phase, when 2.35 {le} x {le} 2.8, was found out to be of the Gd{sub 5}Si{sub 2}Ge{sub 2}-type monoclinic structure. Microhardness tests were conducted on the samples in order to probe the trend in mechanical properties in this alloy system as a function of Ge concentration. The magnetic, thermal and magnetocaloric properties of the Ce{sub 5}Si{sub 4-x}Ge{sub x} alloy system have been investigated for x = 0, 1.0, 1.8, 2.5, 2.8, 3.5, 3.8 and 4.0. The phases with x = 0, 1.0 and 1.8 crystallize in the tetragonal Zr{sub 5}Si{sub 4} structure and those with x = 2.5, 2.8 form in the Gd{sub 5}Si{sub 2}Ge{sub 2}-type monoclinic structure. The alloys with x = 3.5, 3.8 and 4.0 crystallize in the Sm{sub 5}Ge{sub 4}-type orthorhombic structure. The Curie temperature of the tetragonal phases increases with increasing Ge content. The ordering temperatures of the monoclinic and orthorhombic phases remain nearly unaffected by the composition, with the Curie temperatures of the latter slightly higher than those of the former. All the alloys display evidence of antiferromagnetic interactions in the ground state. The orthorhombic and the monoclinic alloys behave as ferromagnets whereas the Si-rich tetragonal phase acts more like an antiferromagnet at high fields (1 T and higher). The maximum isothermal magnetic entropy change occurs at {approx}11 K in the monoclinic and orthorhombic phases with the highest value being 14.7 J/kg.K for Ce{sub 5}Ge{sub 4} for a field change of 10 T which is considered moderate.

  3. Vortex Lattice Studies in CeCoIn? with H?c

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

    Das, P.; White, J. S.; Holmes, A. T.; Gerber, S.; Forgan, E. M.; Bianchi, A. D.; Kenzelmann, M.; Zolliker, M.; Gavilano, J. L.; Bauer, E. D.; Sarrao, J. L.; Petrovic, C.; Eskildsen, M. R.

    2012-02-01T23:59:59.000Z

    We present small angle neutron scattering studies of the vortex lattice (VL) in CeCoIn? with magnetic fields applied parallel (H) to the antinodal [100] and nodal [110] directions. For H II 100], a single VL orientation is observed, while a 90 reorientation transition is found for H II [110]. For both field orientations and VL configurations we find a distorted hexagonal VL with an anisotropy, ?=2.00.05. The VL form factor shows strong Pauli paramagnetic effects similar to what have previously been reported for H II [001]. At high fields, above which the upper critical field (Hc2) becomes a first-order transition, an increased disordering of the VL is observed.

  4. Theoretical studies of Ir5Th and Ir5Ce nanoscale precipitates in Ir

    SciTech Connect (OSTI)

    Morris, James R [ORNL] [ORNL; Averill, Frank [ORNL] [ORNL; Cooper, Valentino R [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    Experimentally, it is known that very small amounts of thorium and/or cerium added to iridium metal form a precipitate, Ir5Th / Ir5Ce, which improves the high temperature mechanical properties of the resulting alloys. We demonstrate that there are low-energy configurations for nano-scale precipitates of these phases in Ir, and that these coherent arrangements may assist in producing improved mechanical properties. One precipitate/matrix orientation gives a particularly low interfacial energy, and a low lattice misfit. Nanolayer precipitates with this orientation are found to be likely to form, with little driving force to coarsen. The predicted morphology of the precipitates and their orientation with the matrix phase provide a potential experiment that could be used to test these predictions.

  5. Complex magnetic ordering in CeFe1.76 studied by neutron diffraction

    SciTech Connect (OSTI)

    Jayasekara, Wageesha T [Ames Laboratory; Tian, W [Oak Ridge National Laboratory; Hodovanets, Halyna [Ames Laboratory; Canfield, Paul C [Ames Laboratory; Bud'ko, Serguei L [Ames Laboratory; Kreyssig, Andreas [Ames Laboratory; Goldman, Alan I [Ames Laboratory

    2014-10-01T23:59:59.000Z

    Neutron diffraction measurements on a single crystal of CeGe1.76 reveal a complex series of magnetic transitions at low temperature. At TN?7 K, there is a transition from a paramagnetic state at higher temperature to an incommensurate magnetic structure characterized by a magnetic propagation vector (0 0 ?) with ??14 and the magnetic moment along the a axis of the orthorhombic unit cell. Below TLI?5 K, the magnetic structure locks in to a commensurate structure with ?=14 and the magnetic moment remains along the a axis. Below T??4 K, we find additional half-integer and integer indexed magnetic Bragg peaks consistent with a second commensurately ordered antiferromagnetic state.

  6. UCL SChooL of Life and MediCaL SCienCeS Creating knowledge, achieving impact

    E-Print Network [OSTI]

    Saunders, Mark

    UCL SChooL of Life and MediCaL SCienCeS Creating knowledge, achieving impact Population Health 4 #12;PREFACE UCL's School of Life and Medical Sciences encompasses arguably the greatest concentration Assessment Exercise was outstanding, and for most key measures the School comfortably tops UK league tables

  7. Pour citer ce document : CHELKOFF, Grgoire. For an ecological approach to architecture : perception and design. First International Workshop

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Pour citer ce document : CHELKOFF, Grégoire. For an ecological approach to architecture : perception and design. First International Workshop : Architectural and urban Ambient Environment, Nantes, 6-7-8 Février 2002. Nantes: CERMA, Ecole D'architecture de Nantes, 2002, 11p. For an ecological approach

  8. CO Oxidation at the Au-Cu Interface of Bimetallic Nanoclusters Supported on CeO2(111)

    E-Print Network [OSTI]

    Henkelman, Graeme

    of tunable interfaces, metal and oxide,9,12,15-18 metal and carbide,19 and oxide and oxide,2 of the structure of CeO2(111)-supported Au- based bimetallic nanoclusters (NCs) show that a strong support-metal Materials, and Catalysis The critical role of the interface between a supporting oxide and supported metal

  9. Synthesis and properties of Sr2CeO4 blue emission powder phosphor for field emission displays

    E-Print Network [OSTI]

    Wang, Zhong L.

    for publication 19 January 1999 A blue emission powder phosphor Sr2CeO4 for field emission displays was preparedV. The emission peak of this phosphor is at 470 nm and Commission International de l'Eclairage coordinates are x 0

  10. Charge transfer and formation of reduced Ce{sup 3+} upon adsorption of metal atoms at the ceria (110) surface

    SciTech Connect (OSTI)

    Nolan, Michael [Tyndall National Institute, University College Cork, Lee Maltings, Prospect Row, Cork (Ireland)

    2012-04-07T23:59:59.000Z

    The modification of cerium dioxide with nanoscale metal clusters is intensely researched for catalysis applications, with gold, silver, and copper having been particularly well studied. The interaction of the metal cluster with ceria is driven principally by a localised interaction between a small number of metal atoms (as small as one) and the surface and understanding the fundamentals of the interaction of metal atoms with ceria surfaces is therefore of great interest. Much attention has been focused on the interaction of metals with the (111) surface of ceria, since this is the most stable surface and can be grown as films, which are probed experimentally. However, nanostructures exposing other surfaces such as (110) show high activity for reactions including CO oxidation and require further study; these nanostructures could be modified by deposition of metal atoms or small clusters, but there is no information to date on the atomic level details of metal-ceria interactions involving the (110) surface. This paper presents the results of density functional theory (DFT) corrected for on-site Coulomb interactions (DFT+U) calculations of the adsorption of a number of different metal atoms at an extended ceria (110) surface; the metals are Au, Ag, Cu, Al, Ga, In, La, Ce, V, Cr, and Fe. Upon adsorption all metals are oxidised, transferring electron(s) to the surface, resulting in localised surface distortions. The precise details depend on the identity of the metal atom. Au, Ag, Cu each transfer one electron to the surface, reducing one Ce ion to Ce{sup 3+}, while of the trivalent metals, Al and La are fully oxidised, but Ga and In are only partially oxidised. Ce and the transition metals are also partially oxidised, with the number of reduced Ce ions possible in this surface no more than three per adsorbed metal atom. The predicted oxidation states of the adsorbed metal atoms should be testable in experiments on ceria nanostructures modified with metal atoms.

  11. Synthesis, Structures, and Magnetic Properties of Rare-Earth Cobalt Arsenides, RCo2As2 (R = La, Ce, Pr, Nd)

    SciTech Connect (OSTI)

    Thompson, Corey [Florida State University, Tallahassee] [Florida State University, Tallahassee; Tan, Xiaoyan [Florida State University, Tallahassee] [Florida State University, Tallahassee; Kovnir, Kirill [Florida State University, Tallahassee] [Florida State University, Tallahassee; Garlea, Vasile O [ORNL] [ORNL; Shatruk, Michael [Florida State University, Tallahassee] [Florida State University, Tallahassee

    2014-01-01T23:59:59.000Z

    Four rare-earth cobalt arsenides, RCo2As2 (R = La, Ce, Pr, Nd), were obtained by reactions of constituent elements in molten Bi. The use of Bi flux also allowed the growth of representative single crystals. All compounds are isostructural and belong to the ThCr2Si2 structure type (space group I4/mmm). The formation of Co vacancies is observed in all structures, while the structures of La- and Ce-containing compounds also show incorporation of minor Bi defects next to the R crystallographic site. Correspondingly, the general formula of these materials can be written as R1 xBixCo2 As2, with x/ = 0.03/0.1, 0.05/0.15, 0/0.2, and 0/0.3 for R = La, Ce, Pr, and Nd, respectively. All compounds exhibit high-temperature ferromagnetic ordering of Co magnetic moments in the range of 150-200 K. Electronic band structure calculations revealed a high peak in the density of states at the Fermi level, thus supporting the itinerant nature of magnetism in the Co sublattice. The magnetic ordering in the lanthanide sublattice takes place at lower temperatures, with the R moments aligning antiparallel to the Co moments to give a ferrimagnetic ground state. The measurements on oriented single crystals demonstrated significant magnetic anisotropy in the ferrimagnetic state, with the preferred moment alignment along the c axis of the tetragonal lattice. Neutron powder diffraction failed to reveal the structure of magnetically ordered states, but confirmed the presence of Co vacancies. X-ray absorption near-edge structure spectroscopy on Ce1.95Bi0.05Co1.85As2 showed the average oxidation state of Ce to be +3.06. Solid state NMR spectroscopy revealed a substantially reduced hyperfine field on the Co atoms in the vicinity of Bi defects.

  12. Effect of MnO on the microstructures, phase stability and mechanical properties of ceria-partially-stabilized zirconia (Ce-TZP) and Ce-TZP-Al sub 2 O sub 3 composites

    SciTech Connect (OSTI)

    Wang, J.S.; Tsai, J.F.; Shetty, D.K.; Virkar, A.V. (Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT (USA))

    1990-09-01T23:59:59.000Z

    Effect of increasing amounts of MnO additions on the microstructures, phase stability and mechanical properties of ZrO{sub 2}-12 m% CeO{sub 2} and ZrO{sub 2}-12 m% CeO{sub 2}-10 w% Al{sub 2}O{sub 3} were studied. MnO suppressed grain growth in ZrO{sub 2}-12 m% CeO{sub 2}, while enhancing the mechanical properties significantly (strength=557 MPa, fracture toughness=9.3 MPa.(m){sup 1/2} at 0.2 w% MnO). The enhanced mechanical properties were achieved despite an increased stability of the tetragonal phase as evidenced by a lower burst transformation temperature (M{sub b}) and a reduced volume fraction of the monoclinic phase on the fracture surface. In ZrO{sub 2}-12 m% CeO{sub 2}-10 w% Al{sub 2}O{sub 3}, the addition of MnO suppressed the grain size of ZrO{sub 2}, while promoting grain growth and changing the morphology of Al{sub 2}O{sub 3}. More significantly, the stability of the tetragonal ZrO{sub 2} phase decreased (high M{sub b} temperature) with a concurrent increase in fracture toughness (13.2 MPa.(m){sup 1/2} at 2 w% MnO) and transformation plasticity (1.2% in four-point bending). The widths of the transformation zones observed adjacent to the fracture surfaces showed a consistent inverse relation to the transformation yield stress as would be expected from the mechanics of stress-induced phase transformation at crack tips. The improvements in mechanical properties obtained in the base Ce-TZP and the Ce-TZP-Al{sub 2}O{sub 3} composite ceramics with the addition of MnO are critically examined in the context of transformation toughening and other possible mechanisms.

  13. A benchmark for investigating the radial dependence of C/E for control rod worths in large decoupled cores

    SciTech Connect (OSTI)

    Salvatores, M. (CEA Centre d'Etudes Nucleaires de Cadarache, 13 - Saint-Paul-lez-Durance (France)); Orechwa, Y. (Argonne National Lab., IL (USA)); Collins, P.J. (Argonne National Lab., Idaho Falls, ID (USA))

    1990-01-01T23:59:59.000Z

    The first physics measurements of a heterogeneous core on the critical assembly ZPPR-7 at ANL showed that the C/E ratios with ENDF/B data for the worths of the control rods in the outer bank were several percent higher than those at the inner bank positions. This radial variation in the C/E for the rod worths was further confirmed in the analysis of the large conventional core ZPPR-10, and again in the analysis of the large heterogeneous core series ZPPR-13. In the design of a power reactor, the number of control rods, and their disposition, are determined by calculations. Misprediction of the worth of the control rods can lead to serious economic penalties by restricting the operation of the core. Retrofitting a core to accommodate more worth will be costly and is likely to lead to a non-optimized core. This document provides a discussion of these calculations. 7 refs., 7 figs., 12 tabs.

  14. Q-dependence of the spin fluctuations in the intermediate valence compound CePd3

    SciTech Connect (OSTI)

    Fanelli, V. R.; Lawrence, J. M.; Goremychkin, E. A.; Osborn, R.; Bauer, E. D.; McClellan, K. J.; Thompson, J. D.; Booth, C. H.; Christianson, A. D.; Riseborough, P. S.

    2014-06-25T23:59:59.000Z

    We report inelastic neutron scattering experiments on a single crystal of the intermediate valence compound CePd3. At 300 K the magnetic scattering is quasielastic, with half-width G = 23 meV, and is independent of momentum transfer Q. At low temperature, the Q-averaged magnetic spectrum is inelastic, exhibiting a broad peak centered near E-max = 55 meV. These results, together with the temperature dependence of the susceptibility, 4f occupation number, and specific heat, can be fit by the Kondo/Anderson impurity model. The low temperature scattering near Emax, however, shows significant variations with Q, reflecting the coherence of the 4f lattice. The intensity is maximal at (1/2, 1/2, 0), intermediate at (1/2, 0, 0) and (0, 0, 0), and weak at (1/2, 1/2, 1/2). We discuss this Q-dependence in terms of current ideas about coherence in heavy fermion systems.

  15. Observation of inner-shell-excited configurations in triply ionized cerium Ce{sup 3+}

    SciTech Connect (OSTI)

    Reader, Joseph; Wyart, Jean-Francois [National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Laboratoire Aime Cotton, CNRS, Universite Paris-Sud, Batiment 505, 91405 Orsay Cedex (France)

    2009-10-15T23:59:59.000Z

    We report wavelength measurements and energy levels for the three-times ionized cerium atom Ce{sup 3+}. The spectrum is that of a simple one-electron atom overlaid with a more complex three-electron spectrum originating from the excitation of an electron in the inner closed shell to the valence shell. The data provide energy levels for the inner-shell-excited configurations 5p{sup 5}4f5d and 5p{sup 5}4f6s and solve a long-standing puzzle regarding the fine structure of the 5p{sup 6}6d configuration, which is known to be anomalously large and inverted. The data show that this anomalous fine structure is the result of interaction between 5p{sup 6}6d and the inner-shell-excited configuration 5p{sup 5}4f5d. The results are supported by Hartree-Fock calculations and least-squares fits of the energy parameters to the observed levels. From our observed 5p{sup 6}6g configuration, we determine the ionization energy as 297670{+-}70 cm{sup -1} (36.906{+-}0.009 eV)

  16. Ion-Beam-Induced Chemical Mixing at a Nanocrystalline CeO2Si Interface

    SciTech Connect (OSTI)

    Edmondson, P. D.; Young, Niel P.; Parish, Chad M.; Moll, Sandra J.; Namavar, Fereydoon; Weber, William J.; Zhang, Yanwen

    2013-02-28T23:59:59.000Z

    Thin films of nanocrystalline ceria deposited onto a silicon substrate have been irradiated with 3 MeV Au+ ions to a total dose of 34 displacements per atom to examine the film/substrate interfacial response upon displacement damage. Under irradiation, a band of contrast is observed to form that grows under further irradiation. Scanning and high-resolution transmission electron microscopy imaging and analysis suggest that this band of contrast is a cerium silicate phase with an approximate Ce:Si:O composition ratio of 1:1:3 in an amorphous nature. The slightly nonstoichiometric composition arises due to the loss of mobile oxygen within the cerium silicate phase under the current irradiation condition. This nonequilibrium phase is formed as a direct result of ion-beam-induced chemical mixing caused by ballistic collisions between the incoming ion and the lattice atoms. This may hold promise in ion beam engineering of cerium silicates for microelectronic applications e.g., the fabrication of blue LEDs.

  17. Ion-Beam-Induced Chemical Mixing at a Nanocrystalline CeO2 Si Interface

    SciTech Connect (OSTI)

    Edmondson, Dr. Philip [University of Oxford; Young, Neil P. [Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK; Parish, Chad M [ORNL; Moll, Sandra [CEA, Saclay, France; Namavar, Fereydoon [University of Nebraska Medical Center; Weber, William J [ORNL; Zhang, Yanwen [ORNL

    2013-01-01T23:59:59.000Z

    Thin films of nanocrystalline ceria deposited onto a silicon substrate have been irradiated with 3 MeV Au+ ions to a total dose of 34 displacements per atom to examine the film/substrate interfacial response upon displacement damage. Under irradiation, a band of contrast is observed to form that grows under further irradiation. Scanning and high-resolution transmission electron microscopy imaging and analysis suggest that this band of contrast is a cerium silicate phase with an approximate Ce:Si:O composition ratio of 1:1:3 in an amorphous nature. The slightly nonstoichiometric composition arises due to the loss of mobile oxygen within the cerium silicate phase under the current irradiation condition. This nonequilibrium phase is formed as a direct result of ion-beam-induced chemical mixing caused by ballistic collisions between the incoming ion and the lattice atoms. This may hold promise in ion beam engineering of cerium silicates for microelectronic applications e.g., the fabrication of blue LEDs.

  18. Structure Sensitivity of the Low-temperature Water-gas Shift Reaction on CuCeO2 catalysts

    SciTech Connect (OSTI)

    Si, R.; Zhang, L.; Raitano, J.; Yi, N.; Chan, S.-W.; Flytzani-Stephanopoulos, M.

    2012-01-17T23:59:59.000Z

    We have investigated the structure sensitivity of the water-gas shift (WGS) reaction on Cu-CeO{sub 2} catalysts prepared at the nanoscale by different techniques. On the surface of ceria, different CuO{sub x} structures exist. We show here that only the strongly bound Cu-[O{sub x}]-Ce species, probably associated with the surface oxygen vacancies of ceria, are active for catalyzing the low-temperature WGS reaction. Weakly bound CuO{sub x} clusters and CuO nanoparticles are spectator species in the reaction. Isolated Cu{sup 2+} ions doping the ceria surface are not active themselves, but they are important in that they create oxygen vacancies and can be used as a reservoir of copper to replenish surface Cu removed by leaching or sintering. Accordingly, synthesis techniques such as coprecipitation that allow for extensive solubility of Cu in ceria should be preferred over impregnation, deposition-precipitation, ion exchange or another two-step method whereby the copper precursor is added to already made ceria nanocrystals. For the synthesis of different structures, we have used two methods: a homogeneous coprecipitation (CP), involving hexamethylenetetramine as the precipitating agent and the pH buffer; and a deposition-precipitation (DP) technique. In the latter case, the ceria supports were first synthesized at the nanoscale with different shapes (rods, cubes) to investigate any potential shape effect on the reaction. Cu-CeO{sub 2} catalysts with different copper contents up to ca. 20 at.% were prepared. An indirect shape effect of CeO{sub 2}, manifested by the propensity to form oxygen vacancies and strongly bind copper in the active form, was established; i.e. the water-gas shift reaction is not structure-sensitive. The apparent activation energy of the reaction on all samples was similar, 50 {+-} 10 kJ/mol, in a product-free (2% CO-10% H{sub 2}O) gas mixture.

  19. Characterization of Ce SUP 3+-tributyl phosphate coordination complexes produced by fused droplet electrospray ionization with a target capillary

    SciTech Connect (OSTI)

    Gary S. Groenewold; Jean-Jacques Gaumet

    2011-12-01T23:59:59.000Z

    Coordination complexes containing Ce(III) and tri-n-butyl phosphate (TBP) in the 1+, 2+ and 3+ charge states were generated using desorption electrospray ionization (DESI) mass spectrometry, in which the analyte solutions were supplied via a target capillary orthogonally situated with respect to the electrospray. Comparison with direct electrospray (ESI) showed that the same coordination complexes were produced in each experiment, and could be described by the general formula [Ce(NO3)m=0-2(TBP)n](3-m)+. This result indicates that DESI has utility for measuring metal speciation for metal ligand solutions where the gas-phase complexes generated by ESI have been correlated with solution speciation. Such an application would be useful for analyses where it is desirable to limit the total amount of metal being handled, or that have solvent systems that are not readily amenable to ESI. Both the direct ESI and DESI mass spectra showed similar trends with respect to the TBP:Ce ratio, viz. high values tend to favor formation of a larger fraction of the 1+ species, and the 2+ and 3+ species become relatively more important as the ratio is decreased. Within individual charge state ion envelopes, lower TBP:Ce ratios produce coordination complexes with fewer ligands, a trend also seen using both approaches. These trends again point toward strong similarity between the direct ESI and DESI analyses of the metal-ligand solutions. The DESI experiments were less sensitive for measuring the coordination complexes compared to the direct ESI experiments, by a factor of 10 - 100 depending on whether minimum detectable concentration or absolute ion abundances were considered. Nevertheless, mid-picomolar quantities of coordination complexes were measured using the target capillary, indicating that sensitivity would be sufficient for measuring species in many industrial separations processes.

  20. Anomalous Chemical Expansion Behavior of Pr[subscript 0.2]Ce[subscript 0.8]O[subscript 2-?] Thin Films Grown by Pulsed Laser Deposition

    E-Print Network [OSTI]

    Kuru, Y.

    The chemomechanical and electrical properties of (Pr,Ce)O[subscript 2-?] thin films were studied between 30 and 875C in air by in situ X-ray diffraction and complex impedance spectroscopy measurements. Reduction/oxidation ...

  1. Adsorption and Reaction of C(1)-C(3) Alcohols over CeO(x)(111) Thin Films

    SciTech Connect (OSTI)

    Mullins, David R [ORNL; Senanayake, Sanjaya D [ORNL; Chen, Tsung-Liang [ORNL

    2010-01-01T23:59:59.000Z

    This study reports the interaction of methanol, ethanol, 1-propanol, and 2-propanol with well-ordered CeO{sub 2}(111) thin film surfaces. All of the alcohols adsorb at low temperature by forming alkoxy and hydroxyl species on the surface. On fully oxidized CeO{sub 2}(111), recombination occurs between some of the alkoxys and hydroxyls, resulting in alcohol desorption near 220 K. At the same temperature, some of the surface hydroxyls disproportionate to produce water and the loss of lattice O. The remaining alkoxys react above 550 K. The primary alcohols favor dehydrogenation products (aldehydes). There is a net loss of O from the system, resulting in a reduction of the ceria. The secondary alcohol, 2-propanol, undergoes primarily dehydration, producing propene with no net change in the cerium oxidation state. Reduced CeO{sub X}(111) competes with the gaseous products for available O. Little or no water is produced. The reaction selectivity for the C{sub 2} and C{sub 3} alcohols shifts toward favoring dehydration products. The loss of O from the alcohols leads to oxidation of the reduced ceria. Compared with the oxidized surface, the alkene desorption shifts to lower temperature, whereas the aldehyde desorption shifts to higher temperature. This indicates that, on the reduced surface, it is easier to break the C-O bond but more difficult to break the O-substrate bond.

  2. Characterization of CeO2-Supported Cu-Pd Bimetallic Catalyst for the Oxygen-Assisted Water-Gas Shift Reaction

    SciTech Connect (OSTI)

    Fox, Elise; Velu, Subramani; Engelhard, Mark H.; Chin, Ya-Huei; Miller, Jeffrey T.; Kropf, Jeremy; Song, Chunshan

    2008-12-10T23:59:59.000Z

    This study was focused to investigate the roles of Cu and Pd in CuPd/CeO2 bimetallic catalysts containing 20-30 wt% Cu and 0.5-1 wt% Pd used in the oxygen-assisted water-gas shift (OWGS) reaction employing a combined bulk and surface characterization techniques such as XRD, TPR, CO chemisorption, and in-situ XPS. The catalytic activity for CO conversion and the stability of catalyst during on-stream operation increased by the addition of Cu to Pd/CeO2 or Pd to Cu/CeO2 monometallic catalysts, especially when the OWGS reaction was performed under low temperatures, below 200oC. The bimetallic catalyst after leaching with nitric acid retained about 60% of its original activity. The TPR of monometallic Cu/CeO2 showed reduction of CuO supported on CeO2 in two distinct regions, around 150 and 250oC. The high temperature peak disappeared and reduction occurred in a single step around 150oC upon Pd addition. The Pd dispersion decreased from 38.5% for Pd/CeO2 to below 1% for CuPd/CeO2 bimetallic catalyst. In-situ XPS studies showed a shift in Cu 2p peaks toward lower binding energy (BE) with concommitant shift in the Pd 3d peaks toward higher BE. Addition of Pd decreased the surface Cu concentration while the concentration of Pd remained unaltered. All these observations indicated the formation of Cu-Pd surface alloy. The valence band XP spectra collected below 10 eV corroborated the core level XP spectra and indicated that Cu is mainly involved in the catalytic reaction. The improved catalytic activity and stability of CuPd/CeO2 bimetallic catalyst was attributed to the alloy formation.

  3. Structural characterization of the CeO{sub 2}/Gd{sub 2}O{sub 3} mixed system by synchrotron X-ray diffraction

    SciTech Connect (OSTI)

    Artini, Cristina, E-mail: c.artini@ge.ieni.cnr.it [Dipartimento di Chimica e Chimica Industriale, Universita degli Studi di Genova, Via Dodecaneso 31, 16146 Genova (Italy); Costa, Giorgio A., E-mail: costa@chimica.unige.it [Dipartimento di Chimica e Chimica Industriale, Universita degli Studi di Genova, Via Dodecaneso 31, 16146 Genova (Italy); CNR-SPIN Genova, Corso Perrone 24, 16152 Genova (Italy); Pani, Marcella, E-mail: marcella@chimica.unige.it [Dipartimento di Chimica e Chimica Industriale, Universita degli Studi di Genova, Via Dodecaneso 31, 16146 Genova (Italy); Lausi, Andrea, E-mail: andrea.lausi@elettra.trieste.it [Sincrotrone Trieste S.C.p.A., ss 14, km 163, 5, 34149 Basovizza, Trieste (Italy); Plaisier, Jasper, E-mail: jasper.plaisier@elettra.trieste.it [Sincrotrone Trieste S.C.p.A., ss 14, km 163, 5, 34149 Basovizza, Trieste (Italy)

    2012-06-15T23:59:59.000Z

    The structural determination of the CeO{sub 2}/Gd{sub 2}O{sub 3} mixed system is a non-trivial problem because of the close resemblance between the ionic sizes of Ce{sup 4+} and Gd{sup 3+} and between the crystal structures of CeO{sub 2} and Gd{sub 2}O{sub 3}. (Ce{sub 1-x}Gd{sub x})O{sub 2-x/2} powder samples with x ranging between 0 and 1 have been synthesized by coprecipitation of mixed oxalates and subsequent thermal decomposition in air at 1200 Degree-Sign C followed by slow cooling. Synchrotron powder X-ray diffraction data were collected and refined by the Rietveld method. Lattice parameters do not follow Vegard's law and no peak splitting has been observed for any composition, meaning that no biphasic regions exist over the whole compositional range. The same hybrid structural model - a proper mixture of the structures of the two pure oxides - was used for the refinements, allowing to account for the data observed. - graphical abstract: Substituting Ce{sup 4+} by Gd{sup 3+}, a gradual transition from the F structure (typical of CeO{sub 2}) to the C structure (typical of Gd{sub 2}O{sub 3}) takes place. The lattice parameters do not follow Vegard's law. Highlights: Black-Right-Pointing-Pointer A structural study of Ce-Gd mixed oxides has been performed. Black-Right-Pointing-Pointer In (Ce{sub 1-x}Gd{sub x})O{sub 2-x/2} a solid solution forms for 0{<=}x{<=}0.3. Black-Right-Pointing-Pointer For x>0.3 a gradual transition from the C to the F structure is observed. Black-Right-Pointing-Pointer Lattice parameters do not follow Vegard's law.

  4. Crystalline Electric Field as a Probe for Long-Range Antiferromagnetic Order and Superconducting State of CeFeAsO1-xFx

    SciTech Connect (OSTI)

    Chi, Songxue [University of Tennessee, Knoxville (UTK); Adroja, D. T. [ISIS Facility, Rutherford Appleton Laboratory; GUIDI, T. [ISIS Facility, Rutherford Appleton Laboratory; Bewley, Robert I. [ISIS Facility, Rutherford Appleton Laboratory; Li, Shiliang [University of Tennessee, Knoxville (UTK); Zhao, Jun [ORNL; Lynn, J. W. [National Institute of Standards and Technology (NIST); Brown, C. M. [National Institute of Standards and Technology (NIST); Qiu, Y. [National Institute of Standards and Technology (NIST); Chen, G. F, [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics; Luo, J. L. [Chinese Academy of Sciences; Wang, N. L. [Chinese Academy of Sciences; Dai, Pengcheng [ORNL

    2008-01-01T23:59:59.000Z

    We use inelastic neutron scattering to study the crystalline electric field (CEF) excitations of Ce{sup 3+} in CeFeAsO{sub 1-x}F{sub x} (x=0, 0.16). For nonsuperconducting CeFeAsO, the Ce CEF levels have three magnetic doublets in the paramagnetic state, but these doublets split into six singlets when the Fe ions order antiferromagnetically. For superconducting CeFeAsO{sub 0.84}F{sub 0.16} (T{sub c} = 41 K), where the static antiferromagnetic order is suppressed, the Ce CEF levels have three magnetic doublets at {h_bar}{sub {omega}} = 0, 18.7, 58.4 meV at all temperatures. Careful measurements of the intrinsic linewidth {Lambda} and the peak position of the 18.7 meV mode reveal a clear anomaly at T{sub c}, consistent with a strong enhancement of local magnetic susceptibility {chi}{double_prime}({h_bar}{sub {omega}}) below T{sub c}. These results suggest that CEF excitations in the rare-earth oxypnictides can be used as a probe of spin dynamics in the nearby FeAs planes.

  5. SESAME 96170, a solid-liquid equation of state for CeO2

    SciTech Connect (OSTI)

    Chisolm, Eric D. [Los Alamos National Laboratory] [Los Alamos National Laboratory

    2014-05-02T23:59:59.000Z

    I describe an equation of state (EOS) for the low-pressure solid phase and liquid phase of cerium (IV) oxide, CeO{sub 2}. The models and parameters used to calculate the EOS are presented in detail, and I compare with data for the full-density crystal. Hugoniot data are available only for high-porosity powders, and I discuss difficulties in comparing with such data. I have constructed SESAME 96170, an EOS for cerium (IV) oxide that includes the ambient solid and liquid phases. The EOS extends over the full standard SESAME range, but should not be used at low temperatures and high densities because of the lack of a high-pressure solid phase. I have described the models used to compute the three terms of the EOS (cold curve, nuclear, and thermal electronic), and I have given the parameters used in the models. They were determined by comparison with experimental data at P = 1 atm, including the constant-pressure specific heat, coefficient of thermal expansion, and melting and boiling points. The EOS compares well with data in its intended range of validity, but the presence of high-frequency optical modes in its phonon spectrum limits the agreement of our models with thermal data. The next step is to construct a multiphase EOS that includes the low- and high-pressure solid phases and the liquid. The DAC data from Duclos will most strongly constrain the parameters of the high-pressure solid. A remaining issue is the comparison of the crystal-density EOS with experimental Hugoniot data, which are taken at much lower initial data because the samples are porous powders. A satisfactory means of modeling porosity, allowing comparison of theory and experiment, has not yet been produced.

  6. Interaction of Ce{sub 1?x}Er{sub x}O{sub 2?y} nanoparticles with SiO{sub 2}-effect of temperature and atmosphere

    SciTech Connect (OSTI)

    Kepinski, L., E-mail: L.Kepinski@int.pan.wroc.pl; Krajczyk, L.; Mista, W.

    2014-01-15T23:59:59.000Z

    Morphology, microstructure and phase evolution of homogeneous, nanocrystalline Ce{sub 1?x}Er{sub x}O{sub 2?x/2} mixed oxide (x=0.3 and 0.5), prepared by microemulsion method, supported on amorphous SiO{sub 2} was studied in oxidizing and reducing atmosphere by XRD, TEM, SEM-EDS and N{sub 2} adsorption. The system is structurally and chemically stable in the oxidizing atmosphere up to 1000 C, exhibiting only a small increase of the mean crystallite size of the oxide to ?4 nm. At 1100 C formation of Er silicate with unusual structure isomorphic with y-Y{sub 2}Si{sub 2}O{sub 7} (yttrialite), stabilized by Ce{sup 4+} ions was observed. In the reducing atmosphere the Ce{sub 1?x}Er{sub x}O{sub 2?x/2} reacted with SiO{sub 2} already at 900 C, due to high affinity of the reduced Ce{sup 3+} to form a silicate phase. At higher temperature the silicate crystallized into the tetragonal, low temperature A-(Ce{sub 1?x}Er{sub x}){sub 2}Si{sub 2}O{sub 7} polymorph. Such systems, containing nanocrystalline silicate particles with Er{sup 3+} ions placed in well defined sites embedded in silica matrix, may be interesting as highly efficient active components of optical waveguides amplifiers integrated with Si microelectronics. The nanocrystalline CeErO/SiO{sub 2} system prepared by the impregnation of the silica with the aqueous solution of nitrates appeared to be chemically inhomogeneous and less stable in both oxidising and reducing atmosphere. - Graphical abstract: Structure evolution of Ce{sub 0.5}Er{sub 0.5}O{sub 1.75} in air and in H{sub 2}. Display Omitted - Highlights: Homogeneous 3 nm Ce{sub 1?x}Er{sub x}O{sub 2?y} particles were prepared and uniformly dispersed on SiO{sub 2}. Er diffusion to SiO{sub 2} determines the stability of the mixed oxide in air to ?1000 C. Spreading of Ce{sub 1?x}Er{sub x}O{sub 2?y} onto SiO{sub 2} occurs in hydrogen at 900 C. Nanocrystalline A-(Ce,Er){sub 2}Si{sub 2}O{sub 7} silicate forms in H{sub 2} at 1100 C.

  7. Ukraine: Energy Resources | Open Energy Information

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  9. Kiev, Ukraine: Energy Resources | Open Energy Information

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  10. Data:Ce7ce2d1-1aee-4b6e-b53c-61f5d633ed15 | Open Energy Information

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  11. Transport properties of partially-filled Ce{sub y}Co{sub 4}Sb{sub 12}

    SciTech Connect (OSTI)

    Uher, C.; Chen, B.; Hu, S.; Morelli, D.T.; Meisner, G.P.

    1997-07-01T23:59:59.000Z

    The authors have investigated the magnetic and transport properties of Ce{sub y}Co{sub 4}Sb{sub 12} filled skutterudites with the filling fraction y {le} 0.1. These compounds are n-type materials that develop a magnetic moment upon the presence of trivalent cerium. Cerium has a strong influence on all transport properties and even in small amounts it drastically reduces the lattice thermal conductivity. The resulting figures of merit are comparable to the values established previously for the p-type filled skutterudites.

  12. Data:69ce9c3e-1066-4306-b704-dccfa06245b9 | Open Energy Information

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  13. Data:5289eb16-08ae-4779-aef7-e948945f84ce | Open Energy Information

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  14. Data:9d9aa544-afad-4985-ba5a-1093160c0ce4 | Open Energy Information

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  16. Data:Ce453e06-3085-4555-bb8f-0a6eefe99579 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision hasf-0a6eefe99579 No revision has

  17. Data:Ce7bcd1a-3552-4059-96b7-c45de0244033 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 No revision has been

  18. Data:Ce81fdcf-0181-4f95-8509-ee44606aaf57 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 No revision

  19. Data:Ce930280-ac1e-449d-8c43-c4daf70201be | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 Nodaf70201be No revision has

  20. EERE Partner Testimonials - Curtis Carlson, SRI International...

    Office of Environmental Management (EM)

    economy and the good news is it's the best time for innovation ever. Footage of different PV systems and researchers looking at them, followed by footage of a man conducting...

  1. Grit Denker, Ph.D. SRI International

    E-Print Network [OSTI]

    Denker, Grit

    and countermeasures of cognitive radios. PI of subcontract to Raytheon BBN Technologies architecture for MANET clusters in space applications designed by Raytheon BBN. PI

  2. Sandia National Laboratories: Sandia, SRI International Sign...

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

    for Infrastructure Research and Innovation * CIRI * Combustion Research Facility * CRF * energy for transportation * hydrogen components * hydrogen fuel systems * Livermore Valley...

  3. NAKAZAWA Minato Sri Hartini Health Sciences

    E-Print Network [OSTI]

    Banbara, Mutsunori

    in the availability of quality health care that currently exists between nations. This division comprises 3 areas: infectious diseases, international health care and international development. In all 3 areas, both fieldwork with the originality and creativity to establish total health care, (2) advanced healthcare specialists with abundant

  4. SriPower | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd JumpGTZHolland,0162112°, -72.1592444°Springwater,

  5. Testimonials - Partnerships in Solar Technologies - SRI International |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmittedStatus TomAboutManusScience and How The NIMRODLegrand Testimonials

  6. International Conference Synchrotron Radiation Instrumentation SRI `94

    SciTech Connect (OSTI)

    Not Available

    1994-10-01T23:59:59.000Z

    This report contains abstracts for the international conference on Synchrotron Radiation Instrumentation at Brookhaven National Laboratory.

  7. Nanopattering in CeOx/Cu(111): A New Type of Surface Reconstruction and Enhancement of Catalytic Activity

    SciTech Connect (OSTI)

    Rodriguez J. A.; Senanayake, S.D.; Sadowski, J.; Evans, J.; Kundu, S.; Agnoli, S.; Yang, F.; Stacchiola, D.; Flege, J.I.; Hrbek, J.

    2012-04-05T23:59:59.000Z

    Our results indicate that small amounts of an oxide deposited on a stable metal surface can trigger a massive surface reconstruction under reaction conditions. In low-energy electron microscopy (LEEM) experiments, no reconstruction of Cu(111) is observed after chemisorbing oxygen or after reducing O/Cu(111) in a CO atmosphere. On the other hand, LEEM images taken in situ during the reduction of CeO{sub 2}/CuO{sub 1-x}/Cu(111) show a complex nonuniform transformation of the surface morphology. Ceria particles act as nucleation sites for the growth of copper microterraces once CuO{sub 1-x} is reduced. Can this reconstructed surface be used to enhance the catalytic activity of inverse oxide/metal catalysts? Indeed, CeO{sub x} on reconstructed Cu(111) is an extremely active catalyst for the water-gas shift process (CO + H{sub 2}O {yields} H{sub 2} + CO{sub 2}), with the Cu microterraces providing very efficient sites for the dissociation of water and subsequent reaction with CO.

  8. CE IGCC repowering project: Clean Coal II Project. Annual report, 1 January, 1992--31 December, 1992

    SciTech Connect (OSTI)

    Not Available

    1993-12-01T23:59:59.000Z

    CE is participating in a $270 million coal gasification combined cycle repowering project that will provide a nominal 60 MW of electricity to City, Water, light and Power (CWL and P) in Springfield, Illinois. The IGCC system will consist of CE`s air-blown entrained flow two-stage gasifier; an advanced hot gas cleanup system; a combustion turbine adapted to use low-Btu gas: and all necessary coal handling equipment. The project is currently in the second budget period of five. The major activities during this budgeted period are: Establishment of an approved for design (AFD) engineering package; development of a detailed cost estimate; resolution of project business issues; CWL and P renewal and replacement activities; and application for environmental air permits. The Project Management Plan was updated. The conceptual design of the plant was completed and a cost and schedule baseline for the project was established previously in Budget Period One. This information was used to establish AFD Process Flow Diagrams, Piping and Instrument Diagrams, Equipment Data Sheets, material take offs, site modification plans and other information necessary to develop a plus or minus 20% cost estimate. Environmental permitting activities are continuing. At the end of 1992 the major activities remaining for Budget Period two is to finish the cost estimate and complete the Continuation Request Documents.

  9. Rapid Microwave Preparation of Highly Efficient Ce[superscript 3+]-Substituted Garnet Phosphors for Solid State White Lighting

    SciTech Connect (OSTI)

    Birkel, Alexander; Denault, Kristin A.; George, Nathan C.; Doll, Courtney E.; Hry, Bathylle; Mikhailovsky, Alexander A.; Birkel, Christina S.; Hong, Byung-Chul; Seshadri, Ram (UCSB); (Mitsubishi)

    2012-04-30T23:59:59.000Z

    Ce{sup 3+}-substituted aluminum garnet compounds of yttrium (Y{sub 3}Al{sub 5}O{sub 12}) and lutetium (Lu{sub 3}Al{sub 5}O{sub 12}) - both important compounds in the generation of (In,Ga)N-based solid state white lighting - have been prepared using a simple microwave heating technique involving the use of a microwave susceptor to provide the initial heat source. Carbon used as the susceptor additionally creates a reducing atmosphere around the sample that helps stabilize the desired luminescent compound. High quality, phase-pure materials are prepared within a fraction of the time and using a fraction of the energy required in a conventional ceramic preparation; the microwave technique allows for a reduction of about 95% in preparation time, making it possible to obtain phase pure, Ce{sup 3+}-substituted garnet compounds in under 20 min of reaction time. It is estimated that the overall reduction in energy compared with ceramic routes as practiced in the lab is close to 99%. Conventionally prepared material is compared with material prepared using microwave heating in terms of structure, morphology, and optical properties, including quantum yield and thermal quenching of luminescence. Finally, the microwave-prepared compounds have been incorporated into light-emitting diode 'caps' to test their performance characteristics in a real device, in terms of their photon efficiency and color coordinates.

  10. Preparation and luminescence characterization of GGAG:Ce{sup 3+},B{sup 3+} for a white light-emitting diode

    SciTech Connect (OSTI)

    Kang, Jun-Gill [Department of Chemistry, Chungnam National University, Daejeon 305-764 (Korea, Republic of)], E-mail: jgkang@cnu.ac.kr; Kim, Myung-Kyo [Alti-Electronics Co., Ltd., 90-1 Bongmyung-Ri, Namsa-Myun, Youngin, Gyeonggi-Do 449-882 (Korea, Republic of); Kim, Kwang-Bok [Kumho Electric, Inc., 64-1, Bongmyung-Ri, Namsa-Myun, Youngin, Gyeonggi-Do 449-883 (Korea, Republic of)

    2008-08-04T23:59:59.000Z

    We prepared Gd{sub 3}Ga{sub 2}Al{sub 3}O{sub 12} (GGAG) co-doped with trivalent cerium and boron ions and investigated its luminescence properties as a function of the B{sup 3+} concentration. The luminescence intensity was enhanced markedly by adding B{sup 3+} as a co-dopant. The non-boron-doped GGAG:Ce{sup 3+} converted less than 10% of the absorbed blue light into luminescence. As the B{sup 3+} concentration increased, Q increased and reached a maximum of Q = 21% at 1.5 moles in GGAG:Ce{sup 3+}. White light closer to daylight with good color-rendering index properties was generated with the proper combination of yellow emission from GGAG:Ce{sup 3+},B{sup 3+} and blue emission from a GaN chip.

  11. Oxide-ion conductivity in Cu {sub x}Ce{sub 1-x}O{sub 2-{delta}} (0 {<=} x {<=} 0.10)

    SciTech Connect (OSTI)

    Gayen, Arup [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India); Priolkar, K.R. [Department of Physics, Goa University, Taleigao Plateau, Goa 403206 (India); Shukla, A.K. [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India); Ravishankar, N. [Materials Research Centre, Indian Institute of Science, Bangalore 560012 (India); Hegde, M.S. [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India)]. E-mail: mshegde@sscu.iisc.ernet.in

    2005-03-08T23:59:59.000Z

    Up to 10 at.% of copper readily substitutes for cerium in ceria. It is found that at oxygen partial pressures between 0.21 atm and 10{sup -5} atm, Cu {sub x}Ce{sub 1-x}O{sub 2-{delta}} (0 {<=} x {<=} 0.10) solid solution behave as an oxide-ion electrolyte. Interestingly, Cu{sub 0.10}Ce{sub 0.90}O{sub 2-{delta}} exhibits the oxide-ion conductivity of ca. 10{sup -4} {omega}{sup -1} cm{sup -1} at 600 deg. C at an oxygen partial pressure of 10{sup -5} atm.

  12. Lu.sub.1-xI.sub.3:Ce.sub.x-a scintillator for gamma-ray spectroscopy and time-of-flight pet

    DOE Patents [OSTI]

    Shah, Kanai S. (Newton, MA)

    2008-02-12T23:59:59.000Z

    The present invention includes very fast scintillator materials including lutetium iodide doped with Cerium (Lu.sub.1-xI.sub.3:Ce.sub.x; LuI.sub.3:Ce). The LuI.sub.3 scintillator material has surprisingly good characteristics including high light output, high gamma-ray stopping efficiency, fast response, low cost, good proportionality, and minimal afterglow that the material is useful for gamma-ray spectroscopy, medical imaging, nuclear and high energy physics research, diffraction, non-destructive testing, nuclear treaty verification and safeguards, and geological exploration.

  13. Computing in SCienCe & engineering This arTicle has been peer-reviewed. 13 R e p r o d u c i b l e R e s e a r c h

    E-Print Network [OSTI]

    LeVeque, Randy

    Computing in SCienCe & engineering This arTicle has been peer-reviewed. 13 R e p r o d u c i b l e as well as some efforts and approaches to overcome them. #12;14 Computing in SCienCe & engineering in 2011; a panel discussion at the International Biometric Society meeting in 2011 featured re- producibility

  14. Hydrogen activation, diffusion, and clustering on CeO{sub 2}(111): A DFT+U study

    SciTech Connect (OSTI)

    Fernndez-Torre, Delia [Departamento de Fsica Terica de la Materia Condensada, Universidad Autnoma de Madrid, E-28049 Madrid (Spain); Instituto de Estructura de la Materia, CSIC, C/ Serrano 121, E-28006 Madrid (Spain); Carrasco, Javier [CIC Energigune, Albert Einstein 48, 01510 Miano, lava (Spain); Instituto de Catlisis y Petroleoqumica, CSIC, C/ Marie Curie 2, E-28049 Madrid (Spain); Ganduglia-Pirovano, M. Vernica [Instituto de Catlisis y Petroleoqumica, CSIC, C/ Marie Curie 2, E-28049 Madrid (Spain); Prez, Rubn, E-mail: ruben.perez@uam.es [Departamento de Fsica Terica de la Materia Condensada, Universidad Autnoma de Madrid, E-28049 Madrid (Spain); Condensed Matter Physics Center (IFIMAC), Universidad Autnoma de Madrid, E-28049 Madrid (Spain)

    2014-07-07T23:59:59.000Z

    We present a comprehensive density functional theory+U study of the mechanisms underlying the dissociation of molecular hydrogen, and diffusion and clustering of the resulting atomic species on the CeO{sub 2}(111) surface. Contrary to a widely held view based solely on a previous theoretical prediction, our results show conclusively that H{sub 2} dissociation is an activated process with a large energy barrier ?1.0 eV that is not significantly affected by coverage or the presence of surface oxygen vacancies. The reaction proceeds through a local energy minimum where the molecule is located close to one of the surface oxygen atoms and the HH bond has been substantially weaken by the interaction with the substrate , and a transition state where one H atom is attached to a surface O atom and the other H atom sits on-top of a Ce{sup 4+} ion. In addition, we have explored how several factors, including H coverage, the location of Ce{sup 3+} ions as well as the U value, may affect the chemisorption energy and the relative stability of isolated OH groups versus pair and trimer structures. The trimer stability at low H coverages and the larger upward relaxation of the surface O atoms within the OH groups are consistent with the assignment of the frequent experimental observation by non-contact atomic force and scanning tunneling microscopies of bright protrusions on three neighboring surface O atoms to a triple OH group. The diffusion path of isolated H atoms on the surface goes through the adsorption on-top of an oxygen in the third atomic layer with a large energy barrier of ?1.8 eV. Overall, the large energy barriers for both, molecular dissociation and atomic diffusion, are consistent with the high activity and selectivity found recently in the partial hydrogenation of acetylene catalyzed by ceria at high H{sub 2}/C{sub 2}H{sub 2} ratios.

  15. Electronic and thermoelectric properties of Ce{sub 3}Te{sub 4} and La{sub 3}Te{sub 4} computed with density functional theory with on-site Coulomb interaction correction

    SciTech Connect (OSTI)

    Vo, Trinh; Allmen, Paul von; Huang, Chen-Kuo; Ma, James; Bux, Sabah; Fleurial, Jean-Pierre [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 (United States)

    2014-10-07T23:59:59.000Z

    The electronic properties and Seebeck coefficients of Ce{sub 3}Te{sub 4} and La{sub 3}Te{sub 4} are computed using Density Functional Theory with on-site Coulomb interaction correction. We found that the Seebeck coefficients of Ce{sub 3}Te{sub 4} and La{sub 3}Te{sub 4} are almost equal at temperatures larger than the Curie temperature of Ce{sub 3}Te{sub 4}, and in good agreement with the measurements reported by May et al. [Phys. Rev. B 86, 035135 (2012)]. At temperatures below the Curie temperature, the Seebeck coefficient of Ce{sub 3}Te{sub 4} increases due to the ferromagnetic ordering, which leads the f-electron of Ce to contribute to the Seebeck coefficient in the relevant range of electron concentration.

  16. Adsorbate effects on a mixed-valence compound: Carbon monoxide chemisorption on CeIr/sub 2/

    SciTech Connect (OSTI)

    Lindquist, J.M.; Hemminger, J.C.; Lawrence, J.

    1987-10-15T23:59:59.000Z

    We have studied the effects of stoichiometry change and CO chemisorption on the surface electronic structure of the mixed-valence compound CeIr/sub 2/. We show that the surface iridium to cerium ratio can be varied by changing sample temperature while sputtering. Carbon monoxide is found to adsorb 80% molecularly on the surface and cause a mild surface oxidation which induces a shift of electron density into available cerium f orbitals. Peaks due to the 4sigma, 1..pi.., and 5sigma CO molecular orbitals appear at different binding energies than those due to molecular CO on the pure iridium surface. This binding-energy shift as well as the high percentage of molecular CO on the surface (CO adsorption on pure cerium is completely dissociative) points toward a surface which has lost much of the elemental character of its two constituents upon compound formation.

  17. Adsorbate effects on a mixed-valence compound: carbon monoxide chemisorption on CeIr/sub 2/

    SciTech Connect (OSTI)

    Lindquist, J.M.; Hemminger, J.C.

    1987-10-15T23:59:59.000Z

    The authors studied the effects of stoichiometry change and CO chemisorption on the surface electronic structure of the mixed-valence compound CeIr/sub 2/. It is shown that the surface iridium to cerium ratio can be varied by changing sample temperature while sputtering. Carbon monoxide is found to adsorb 80% molecularly on the surface and cause a mild surface oxidation which induces a shift of electron density into available cerium f orbitals. Peaks due to the 4 sigma, 1 pi, and 5 sigma CO molecular orbitals appear at different binding energies than those due to molecular CO on the pure iridium surface. This binding-energy shift as well as the high percentage of molecular CO on the surface (CO adsorption on pure cerium is completely dissociative) points toward a surface which has lost much of the elemental character of its two constituents upon compound formation.

  18. Effect of CeO{sub 2} buffer layer on the microstructure and magnetic properties of yttrium iron garnet film on Si substrate

    SciTech Connect (OSTI)

    Yang Qinghui; Zhang Huaiwu; Wen Qiye; Liu Yingli [State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054 (China); Xiao, John Q. [Department of Physics and Astronomy, University of Delaware, Newark, Delaware, 19716 (United States)

    2009-04-01T23:59:59.000Z

    Yttrium iron garnet films were grown by radio frequency magnetron sputtering on Si(111) substrate with and without CeO{sub 2} buffer layer, and influence of CeO{sub 2} buffer on the microstructure and magnetic behaviors of the films were investigated. As compared with the film without buffer, a larger saturation magnetizaton (M{sub s}), lower coercive force (H{sub c}), and higher remnant magnetization (M{sub r}) were obtained due to the introduction of CeO{sub 2} layer. The higher M{sub s} results from the denser structure and the smaller content of Fe{sup 2+} ions. The lower H{sub c} and higher M{sub r} can be explained by the small surface roughness and crystal grains size. The film on CeO{sub 2} buffer layer possess fine microstructure and its surface roughness is smaller than the unbuffered films, which provides an increased exchange between the crystal grains and an enhanced spontaneous magnetization effect, leading to the higher remnant magnetization.

  19. UV absorption properties of ceria-modified compositions within the fluorite-type solid solution CeO{sub 2}-Y{sub 6}WO{sub 12}

    SciTech Connect (OSTI)

    Chevire, Francois [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Munoz, Francisco [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Baker, Charles F. [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Tessier, Franck [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France)]. E-mail: Franck.Tessier@univ-rennes1.fr; Larcher, Olivier [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Boujday, Souhir [Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, CNRS UPR 1311, Universite Paris 13, 99 Avenue J. B. Clement, 93430 Villetaneuse (France); Colbeau-Justin, Christophe [Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, CNRS UPR 1311, Universite Paris 13, 99 Avenue J. B. Clement, 93430 Villetaneuse (France); Marchand, Roger [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France)

    2006-10-15T23:59:59.000Z

    A new fluorite-type solid solution domain has been evidenced in the system (1-x) CeO{sub 2}-x/7 Y{sub 6}WO{sub 12}{open_square}{sub 2} using the amorphous citrate route. All the studied phases (0{<=}x{<=}1) crystallize in a cubic-type symmetry. Diffuse reflectance spectra reveal a strong optical absorption between 380 and 400 nm. All substituted compositions spectral selectivities are estimated suitable for application as inorganic UV absorbers. The non linear variation observed in the optical gap values between Y{sub 6}WO{sub 12} and CeO{sub 2} is attributed to the presence of the cerium 4f-block band. Additionally, Time Resolved Microwave Conductivity (TRMC) experiment and phenol photodegradation analyses carried out on the Ce{sub 0.81}Y{sub 0.16}W{sub 0.03}O{sub 1.95}{open_square}{sub 0.05} (x=0.19) composition do not indicate any photocalatytic activity for this material. - Graphical abstract: Diffuse reflectance spectra of the Ce-Y-W-O samples calcined at 1000 deg. C.

  20. TP HTML -CSS -PHP -POSTGRESQL Le but de ce TP est de complter les fichiers fournis pour raliser une micro application interactive qui

    E-Print Network [OSTI]

    Ligozat, Anne-Laure

    TP HTML - CSS - PHP - POSTGRESQL Le but de ce TP est de compléter les fichiers fournis pour afficher (fichiers .html ou .php). · Enregistrez dans votre home l'archive contenant les fichiers du TP à partir de http://perso.limsi.fr/annlor/enseignement/ensiie/pw/tpPHP.tar · Extrayez de l'archive le

  1. The Institute for Integrated Cell-Material Sciences (iCeMS) was founded in 2007 as part of a government program called the World Premier International

    E-Print Network [OSTI]

    Takada, Shoji

    , Sports, Science and Technology (MEXT) of Japan. The fund provides a total of 6 million dollars per year science. iCeMS is one of nine WPI centers throughout Japan and boasts eighteen world-renowned principal investigators, who are leading experts in cell biology, chemistry, and physics. Notably, Kyoto University Center

  2. Electronic Structure of CeFeAsO1-xFx (x=0, 0.11/x=0.12) compounds

    SciTech Connect (OSTI)

    Bondino, F.; Magnano, E.; Booth, C. H.; Offi, F.; Panaccione, G.; Malvestuto, M.; Paolicelli, G.; Simonelli, L.; Parmigiani, F.; McGuire, M. A.; Sefat, A. S.; Sales, B. C.; Jin, R.; Vilmercati, P.; Mandrus, D.; Singh, D. J.; Mannella, N.

    2011-01-25T23:59:59.000Z

    We report an extensive study on the intrinsic bulk electronic structure of the high-temperature superconductor CeFeAsO{sub 0.89}F{sub 0.11} and its parent compound CeFeAsO by soft and hard x-ray photoemission, x-ray absorption and soft-x-ray emission spectroscopies. The complementary surface/bulk probing depth, and the elemental and chemical sensitivity of these techniques allows resolving the intrinsic electronic structure of each element and correlating it with the local structure, which has been probed by extended-x-ray absorption fine structure spectroscopy. The measurements indicate a predominant 4f{sup 1} (i.e. Ce{sup 3+}) initial state configuration for Cerium and an effective valence-band-to-4f charge-transfer screening of the core hole. The spectra also reveal the presence of a small Ce f{sup 0} initial state configuration, which we assign to the occurrence of an intermediate valence state. The data reveal a reasonably good agreement with the partial density of states as obtained in standard density functional calculations over a large energy range. Implications for the electronic structure of these materials are discussed.

  3. Un atlas smantique pour le cerveau Un des buts principaux de ce projet est le dveloppement d'un outil qui permettra

    E-Print Network [OSTI]

    Institut des Sciences Cognitives, CNRS

    Un atlas sémantique pour le cerveau Un des buts principaux de ce projet est le développement d construire des représentations sémantiques à partir de large corpus de textes (les Atlas sémantiques (AS

  4. VI INTERNATIONAL TELECOMMUNICATIONS SYMPOSIUM (ITS2006), SEPTEMBER 3-6, 2006, FORTALEZA-CE, BRAZIL 1 Fringe Benefits of the H.264/AVC

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    of the Motion Picture Experts Groups (MPEG) from the International Standards Organization (ISO) and of the VideoVI INTERNATIONAL TELECOMMUNICATIONS SYMPOSIUM (ITS2006), SEPTEMBER 3-6, 2006, FORTALEZA-CE, BRAZIL, and Tiago A. Fonseca Abstract-- H.264/AVC is the newest, state-of-the-art, video compression standard

  5. Effect of CeO{sub 2} addition on the properties of FeAl based alloy produced by mechanical alloying technique

    SciTech Connect (OSTI)

    Khaerudini, Deni S.; Muljadi,; Sardjono, P.; Tetuko, Anggito P.; Sebayang, P.; Ginting, M. [Research Center for Physics, Indonesian Institute of Sciences (LIPI) Gd. 440, Kawasan Puspiptek Serpong Tangerang 15314 Banten (Indonesia)] [Research Center for Physics, Indonesian Institute of Sciences (LIPI) Gd. 440, Kawasan Puspiptek Serpong Tangerang 15314 Banten (Indonesia)

    2013-09-03T23:59:59.000Z

    Iron aluminides based on FeAl is notable for their low materials cost, ease of fabrication and good corrosion, suffixation and oxidation resistance. However, the application based on these unique properties still require the development of Fe-Al based alloy since it shows some drawbacks such as a lack of high temperature strength and low ductility. To improve the mechanical properties of FeAl based alloy, ceria (CeO{sub 2}) will be added to this compound. FeAl based alloy produced by the mechanical alloying (MA) technique. The developed specimens then assessed with respect to oxidation behaviour in high temperature, scale microstructure and hardness. The surface morphologies of the alloy evaluated and observed using scanning electron microscopy (SEM) with an energy dispersive X-ray spectroscopy (EDX). The phase structures of oxide scale formed on them were identified by X-ray diffraction (XRD). The results found that the FeAl intermetallic compound containing CeO{sub 2} 0.5 wt.% is less pores and CeO{sub 2} 1.0 wt.% is more homogen in powder and solid form, higher hardness and increase in their resistance to oxidation behaviour in high temperature compared with another percentage of CeO{sub 2}.

  6. IFT1227, Architecture des ordinateurs 1: Ce devoir vous permet de manipuler les robots equipes de la -chip PIC18F4550 presentes en demo.

    E-Print Network [OSTI]

    Boyer, Michel

    IFT1227, Architecture des ordinateurs 1: Devoir 3 Ce devoir vous permet de manipuler les robots robot soit attir´e ou suive une lumi`ere relativement forte (une lampe de poche ou autre mise devant lui). 1 Comportement basique Votre programme devra fournir le comportement suivant : ­ Quand le robot

  7. plan de polarisation de 18', en sens contraire du courant qui anime l'lecuro-aimant. On peut comparer ce rsultat avec l'effet produit

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    celle que produit directement l'acier, ce qui donne pour l'effet de la lame 50' au lieu de 48', nombre un champ magntique et du phnomne de Peltier. L'exprience de M. Hall est rpte au moyen d

  8. CE IGCC Repowering Project: Use of the Lockheed Kinetic Extruder for coal feeding; Topical report, June 1993

    SciTech Connect (OSTI)

    NONE

    1994-02-01T23:59:59.000Z

    ABB CE is evaluating alternate methods of coal feed across a pressure barrier for its pressurized coal gasification process. The Lockheed Kinetic Extruder has shown to be one of the most promising such developments. In essence, the Kinetic Extruder consists of a rotor in a pressure vessel. Coal enters the rotor and is forced outward to the surrounding pressure vessel by centrifugal force. The force on the coal passing across the rotor serves as a pressure barrier. Should this technology be successfully developed and tested, it could reduce the cost of IGCC technology by replacing the large lockhoppers conventionally used with a much smaller system. This will significantly decrease the size of the gasifier island. Kinetic Extruder technology needs testing over an extended period of time to develop and prove the long term reliability and performance needed in a commercial application. Major issues to be investigated in this program are component design for high temperatures, turn-down, scale-up factors, and cost. Such a test would only be economically feasible if it could be conducted on an existing plant. This would defray the cost of power and feedstock. Such an installation was planned for the CE IGCC Repowering Project in Springfield, Illinois. Due to budgetary constraints, however, this provision was dropped from the present plant design. It is believed that, with minor design changes, a small scale test version of the Kinetic Extruder could be installed parallel to an existing lockhopper system without prior space allocation. Kinetic Extruder technology represents significant potential cost savings to the IGCC process. For this reason, a test program similar to that specified for the Springfield project would be a worthwhile endeavor.

  9. Ukraine Loads U.S. Nuclear Fuel into Power Plant as Part of DOE-Ukraine

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists' Research Petroleum ReserveDepartment of EnergyDepartment ofRemarksNuclear Fuel

  10. United States and Ukraine Sign Agreement to Improve Security of Ukraine's

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists' Research Petroleum ReserveDepartment ofEnergy, Office ofNuclear

  11. Gold, Copper, and Platinum Nanoparticles Dispersed on CeOx/TiO2(110) Surfaces: High Water-Gas Shift Activity and the Nature of the Mixed-Metal Oxide at the Nanometer Level

    SciTech Connect (OSTI)

    Park, J.; Graciani, J; Evans, J; Stacchiola, D; Senanayake, S; Barrio, L; Liu, P; Fdez. Sanz, J; Hrbek, J; Rodriguez, J

    2010-01-01T23:59:59.000Z

    At small coverages of ceria on TiO{sub 2}(110), the CeO{sub x} nanoparticles have an unusual coordination mode. Scanning tunneling microscopy and density-functional calculations point to the presence of Ce{sub 2}O{sub 3} dimers, which form diagonal arrays that have specific orientations of 0, 24, and 42{sup o} with respect to the [1 -1 0] direction of the titania substrate. At high coverages of ceria on TiO{sub 2}(110), the surface exhibits two types of terraces. In one type, the morphology is not very different from that observed at low ceria coverage. However, in the second type of terrace, there is a compact array of ceria particles with structures that do not match the structures of CeO{sub 2}(111) or CeO{sub 2}(110). The titania substrate imposes on the ceria nanoparticles nontypical coordination modes, enhancing their chemical reactivity. This phenomenon leads to a larger dispersion of supported metal nanoparticles (M = Au, Cu, Pt) and makes possible the direct participation of the oxide in catalytic reactions. The M/CeO{sub x}/TiO{sub 2}(110) surfaces display an extremely high catalytic activity for the water-gas shift reaction that follows the sequence Au/CeO{sub x}/TiO{sub 2}(110) < Cu/CeO{sub x}/TiO{sub 2}(110) < Pt/CeO{sub x}/TiO{sub 2}(110). For low coverages of Cu and CeO{sub x}, Cu/CeO{sub x}/TiO{sub 2}(110) is 8-12 times more active than Cu(111) or Cu/ZnO industrial catalysts. In the M/CeO{sub x}/TiO{sub 2}(110) systems, there is a strong coupling of the chemical properties of the admetal and the mixed-metal oxide: The adsorption and dissociation of water probably take place on the oxide, CO adsorbs on the admetal nanoparticles, and all subsequent reaction steps occur at the oxide-admetal interface. The high catalytic activity of the M/CeO{sub x}/TiO{sub 2}(110) surfaces reflects the unique properties of the mixed-metal oxide at the nanometer level.

  12. Gold, Copper and Platinum Nanoparticles Dispersed on CeOx/TiO2(110) Surfaces: High Water-Gas Shift Activity and the Nature of the Mixed-Metal Oxide at the Nanometer Level

    SciTech Connect (OSTI)

    Rodriguez, J.A.; Park, J.B.; Graciani, J.; Evans, J.; Stacchiola, D.; Senanayake, S.D.; Barrio, L.; Liu, P.; Sanz, J.F.; Hrbek, J.

    2010-01-13T23:59:59.000Z

    At small coverages of ceria on TiO{sub 2}(110), the CeO{sub x} nanoparticles have an unusual coordination mode. Scanning tunneling microscopy and density-functional calculations point to the presence of Ce{sub 2}O{sub 3} dimers, which form diagonal arrays that have specific orientations of 0, 24, and 42{sup o} with respect to the [1 -1 0] direction of the titania substrate. At high coverages of ceria on TiO{sub 2}(110), the surface exhibits two types of terraces. In one type, the morphology is not very different from that observed at low ceria coverage. However, in the second type of terrace, there is a compact array of ceria particles with structures that do not match the structures of CeO{sub 2}(111) or CeO{sub 2}(110). The titania substrate imposes on the ceria nanoparticles nontypical coordination modes, enhancing their chemical reactivity. This phenomenon leads to a larger dispersion of supported metal nanoparticles (M = Au, Cu, Pt) and makes possible the direct participation of the oxide in catalytic reactions. The M/CeO{sub x}/TiO{sub 2}(110) surfaces display an extremely high catalytic activity for the water-gas shift reaction that follows the sequence Au/CeO{sub x}/TiO{sub 2}(110) < Cu/CeO{sub x}/TiO{sub 2}(110) < Pt/CeO{sub x}/TiO{sub 2}(110). For low coverages of Cu and CeO{sub x}, Cu/CeO{sub x}/TiO{sub 2}(110) is 8-12 times more active than Cu(111) or Cu/ZnO industrial catalysts. In the M/CeO{sub x}/TiO{sub 2}(110) systems, there is a strong coupling of the chemical properties of the admetal and the mixed-metal oxide: The adsorption and dissociation of water probably take place on the oxide, CO adsorbs on the admetal nanoparticles, and all subsequent reaction steps occur at the oxide-admetal interface. The high catalytic activity of the M/CeO{sub x}/TiO{sub 2}(110) surfaces reflects the unique properties of the mixed-metal oxide at the nanometer level.

  13. Substitution effect on the magnetic and transport properties of CeNi{sub 0.8?x}Mn{sub x}Bi{sub 2}

    SciTech Connect (OSTI)

    Kim, Soo-Whan; Lee, Kyujoon; Jung, Myung-Hwa, E-mail: mhjung@sognag.ac.kr [Department of Physics, Sogang University, Seoul 121-742 (Korea, Republic of); Adroja, D. T. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom); Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006 (South Africa); Demmel, F.; Taylor, J. W. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom)

    2014-08-21T23:59:59.000Z

    We report the results of Mn substitution for Ni in CeNi{sub 0.8}Bi{sub 2} (i.e., CeNi{sub 0.8?x}Mn{sub x}Bi{sub 2}). All the samples have an antiferromagnetic ordered state below T{sub N}?=?5.0?K due to localized 4f-magnetic moment on the Ce ions. Besides this antiferromagnetic ordering caused by Ce, the magnetic and transport properties are abruptly changed with increasing Mn contents at the boundary composition of x?=?0.4. The magnetic state is changed into a ferromagnetic state around 200?K for x?>?0.4, where the electrical resistivity is strongly suppressed to become simple metallic. These results of ferromagnetism and metallicity can be explained by the double exchange mechanism, rather than the simple picture of Doniach phase diagram. The mixed valence states of Ni and Mn ions are confirmed by X-ray photoelectron spectroscopy. For x???0.4, the initial Ni{sup 3+} state gradually changes to the Ni{sup 2+} state with increasing x up to 0.4. On further increase of x?>?0.4, the Ni{sup 2+} state is replaced by the Mn{sup 2+} state, which gradually changes to the final Mn{sup 3+} state. We also present an inelastic neutron scattering (INS) measurements on CeNi{sub 0.8}Bi{sub 2} (i.e., x?=?0) between 1.2 and 12?K. The high energy INS study reveals the presence of two well-defined crystal electric field (CEF) excitations near 9?meV and 19?meV at 1.2?K and 6?K, while the low energy INS study reveals the presence of quasielastic scattering above 4?K. We will discuss our INS results of CeNi{sub 0.8}Bi{sub 2} based on the CEF model.

  14. Role of dopant incorporation on the magnetic properties of Ce1-xNixO2 nanoparticles: An electron paramagnetic resonance study

    SciTech Connect (OSTI)

    Misra, S. K.; Andronenko, S. I.; Engelhard, Mark H.; Thurber, Aaron P.; Reddy, K. M.; Punnoose, Alex

    2008-04-01T23:59:59.000Z

    Nickel doping has been found to produce weak room-temperature ferromagnetism in CeO2 [1]. The saturation magnetization of the chemically synthesized Ce1-xNixO2 samples showed a maximum for x = 0.04, above which the magnetization decreased gradually. For Ce1-xNixO2 samples with x ? 0.04, an activation process involving slow annealing of the sample to 500 oC increased the saturation magnetization by more than two orders of magnitude [1]. However, no such activation effect was observed in samples with x < 0.04. Electron paramagnetic resonance (EPR), a sensitive technique to investigate the ionic states and local environments and interactions, has been used here in this work to investigate (i) why the ferromagnetic behavior gradually weakened and disappeared for x > 0.04 and (ii)_what causes the saturation magnetization to dramatically increase in the activated Ce1-xNixO2 samples with x ? 0.04 and why this process is absent in samples with x < 0.04. Our X-band (~9.4 GHz) EPR experiments and detailed simulation analysis on several as-prepared Ce1-xNixO2 samples with 0.01 ? x ? 0.10 at 5 K and 300 K indicate the presence of two magnetically inequivalent Ni2+ ions with the ionic spin of 1, one Ce3+ ion with spin , and three O2-. Spectra of samples with x < 0.04 are dominated by a single Ni2+ EPR line ascribed to dopant ions in substitutional sites whereas in samples with x ? 0.04, an additional signal attributed to Ni2+ ions in interstitial sites is also present. In the activated sample, the EPR line due to the interstitial Ni2+ is completely absent and only the lines due to substituional Ni2+ ions are present suggesting that the enhanced ferromagnetism results from conversion of interstitial Ni2+ ions to substitutional sites.

  15. Solar Reflectance Index (SRI) Calculation Worksheet SRI-WS Computer Generated Form

    E-Print Network [OSTI]

    Zone: Building Type: Residential Nonresidential Project Name: Project Address: Roofing Products (Cool Roof) Roofing products with high solar reflectance and thermal emittance are referred to as "Cool Roof required to provide air conditioning. The benefit of a high reflectance surface is obvious: while dark

  16. Powder preparation and UV absorption properties of selected compositions in the CeO{sub 2}-Y{sub 2}O{sub 3} system

    SciTech Connect (OSTI)

    Tessier, Franck [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France)], E-mail: Franck.Tessier@univ-rennes1.fr; Chevire, Francois; Munoz, Francisco; Merdrignac-Conanec, Odile; Marchand, Roger [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Bouchard, Michel; Colbeau-Justin, Christophe [Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, CNRS UPR 1311, Universite Paris 13, 99 Avenue J.B. Clement, 93430 Villetaneuse (France)

    2008-05-15T23:59:59.000Z

    Several approaches have been investigated to prepare fluorite-type compositions within the (1-x) CeO{sub 2}-xYO{sub 1.5} system. The optical properties of the resulting modified-ceria materials have been characterized in order to evaluate their potential abilities as inorganic UV absorbers. Diffuse reflectance analyses reveal a strong optical absorption between 390 and 400 nm for all substituted compositions and the spectral selectivities are estimated suitable for the targeted application. Additionally, time resolved microwave conductivity (TRMC) and phenol photodegradation analyses do not indicate any photocalatytic activity for these compositions. Aqueous colloidal suspensions of the Ce{sub 0.7}Y{sub 0.3}O{sub 1.85} UV absorber have been carried out. - Graphical abstract: Comparison between diffuse reflectance spectra of ceria (x=0) and yttrium modified ceria (x=0.3)

  17. Lu1-xI3:Cex--a scintillator for gamma ray spectroscopy and time-of-flight PET

    DOE Patents [OSTI]

    Shah, Kanai S.

    2007-02-06T23:59:59.000Z

    The present invention concerns very fast scintillator materials comprising lutetium iodide doped with Cerium (Lu1-xI3:Cex; LuI3:Ce). The LuI3 scintillator material has surprisingly good characteristics including high light output, high gamma ray stopping efficiency, fast response, low cost, good proportionality, and minimal afterglow that the material is useful for gamma ray spectroscopy, medical imaging, nuclear and high energy physics research, diffraction, non-destructive testing, nuclear treaty verification and safeguards, and geological exploration. The timing resolution of the scintillators of the present invention provide compositions capable of resolving the position of an annihilation event within a portion of a human body cross-section.

  18. Fabrication of CeO2 by sol-gel process based on microfluidic technology as an analog preparation of ceramic nuclear fuel microspheres

    E-Print Network [OSTI]

    Bin Ye; Jilang Miao; Jiaolong Li; Zichen Zhao; Zhenqi Chang; Christophe A. Serra

    2012-12-15T23:59:59.000Z

    Microfluidics integrated with sol-gel processes is introduced in preparing monodispersed MOX nuclear fuel microspheres using nonactive cerium as a surrogate for uranium or plutonium. The detailed information about microfluidic devices and sol-gel processes are provided. The effects of viscosity and flow rate of continuous and dispersed phase on size and size distribution of CeO2 microspheres have been investigated. A comprehensive characterization of the CeO2 microspheres has been conducted, including XRD pattern, SEM, density, size and size distribution. The size of prepared monodisperse particles can be controlled precisely in range of 10{\\mu}m to 1000{\\mu}m and the particle CV is below 3%.

  19. CO chemisorption effect on cerium initial and final states in the core level photoelectron spectrum of CeIr

    SciTech Connect (OSTI)

    Lindquist, J.M.; Hemminger, J.C.

    1987-10-22T23:59:59.000Z

    Carbon monoxide (CO) adsorption on the mixed-valence compound CeIr/sub 2/ has been studied by X-ray photoelectron spectroscopy. CO adsorption on this surface is predominantly molecular. They show that changes in the cerium 3d spectrum upon CO chemisorption may be separated into initial- and final-state effects. In the initial state, stabilization of the (Xe)(5d6s)/sup 3/4f/sup 1/ configuration occurs due to an increase in effective nuclear charge on the cerium atom. This leads to a decrease in f/sup 0/ intensity in the recorded spectrum. Increased f-electron repulsion in the final state raises the energy of the f/sup 2/ final-state configuration and causes a 2.2-eV shift to higher binding energy of the 3d/sub 5/2/f/sup 2/ peak. The 0.5-eV binding energy shifts of the 3d/sub 5/2/f/sup 1/ and 3d/sub 3/2/f/sup 1/ peaks along with the 2.2-eV shift of the 3d/sub 5/2/f/sup 2/ peak indicate that the f orbitals are quite sensitive indicators of the surface oxidation state in this compound.

  20. Contact Undergraduate Admissions Office | Tel +44 (0)117 928 8154 Email socsci-ug-admissions@bristol.ac.uk 54 ACCOUnTing And FinAnCE

    E-Print Network [OSTI]

    Subramanian, Sriram

    -ug-admissions@bristol.ac.uk 54 ACCOUnTing And FinAnCE FACULTY oF soCiAL sCienCes And LAw bristol.ac.uk Accounting and Finance As one of the UK's leading departments for Accounting and Finance, we offer you the opportunity to study and their application skills. bristol.ac.uk/accounting Why study Accounting and Finance at Bristol? Bristol has

  1. In : John Tolan (d.), L'change, Paris, L'harmattan, 2009, pp. 201-214 Qu'est-ce qu'un change marchand ? Proposition de trois

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    marchand ? Proposition de trois définitions cumulatives pour l'analyse Ronan Le Velly Qu'est-ce qu'un échange marchand ? Cette question en apparence anodine a suggéré des réponses très différentes en sciences participent ou se tiennent à l'écart du système marchand (partie 3). 1. Le marché comme catégorie de

  2. TUDE DES ISOTONES N = 81 : 139Ce, 141Nd, 143Sm, AU MOYEN DES RACTIONS (d, t ) ET (3He, 03B1)

    E-Print Network [OSTI]

    Boyer, Edmond

    'energie et la fragmentation de ces 6tats en fonction du nombre de protons. Le pick-up d'un neutron sur les' plus de 3 MeV d'nergie d'excitation, essentiellement au moyen d'un spectromtre magntique splitpole MeV excitation energy, of the N = 81 isotones : 139Ce, 141Nd, 143 Sm, have been studied at the Orsay

  3. High Activity of Ce1-xNixO2-y for H2 Production through Ethanol Steam Reforming: Tuning Catalytic Performance through Metal-Oxide Interactions

    SciTech Connect (OSTI)

    G Zhou; L Barrio; S Agnoli; S Senanayake; J Evans; A Kubacka; M Estrella; J Hanson; A Martinez-Arias; et al.

    2011-12-31T23:59:59.000Z

    The importance of the oxide: Ce{sub 0.8}Ni{sub 0.2}O{sub 2-y} is an excellent catalyst for ethanol steam reforming. Metal-oxide interactions perturb the electronic properties of the small particles of metallic nickel present in the catalyst under the reaction conditions and thus suppress any methanation activity. The nickel embedded in ceria induces the formation of O vacancies, which facilitate cleavage of the OH bonds in ethanol and water.

  4. Study of oxygen reduction mechanism on Ag modified1 Sm1.8Ce0.2CuO4 cathode for solid oxide fuel cell2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to oxygen dissociation and diffusion process.26 KEYWORDS: Solid oxide fuel cell; Silver infiltration-time of the cell/stack/module as well as to reduce the cost of the materials. So32 far, many studies have beenStudy of oxygen reduction mechanism on Ag modified1 Sm1.8Ce0.2CuO4 cathode for solid oxide fuel

  5. Electronic structure analysis and properties of Sr{sub 2}CeO{sub 4} grown by solgel method

    SciTech Connect (OSTI)

    Talik, E., E-mail: talik@us.edu.pl [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland); Lipi?ska, L. [Institute of Electronic Materials Technology, ul. Wlczy?ska 133, 01-919 Warszawa (Poland)] [Institute of Electronic Materials Technology, ul. Wlczy?ska 133, 01-919 Warszawa (Poland); Skrzypek, D. [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland)] [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland); Skuta, A. [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland) [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland); Institute of Electronic Materials Technology, ul. Wlczy?ska 133, 01-919 Warszawa (Poland); Zajdel, P.; Guzik, A.; Duda, H. [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland)] [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland)

    2012-11-15T23:59:59.000Z

    Highlights: ? Sr{sub 2}CeO{sub 4} nanopowders were obtained by solgel method. ? SEM/EDX imaging and chemical analysis have been done. ? XPS electronic structure was examined and discussed. ? The terminal and equatorial Ce-O bonds contributions were determined in O2p states. ? The energy gap was estimated by valence band and electrical measurements. -- Abstract: Sr{sub 2}CeO{sub 4} is a very promising material due to its various industrial applications, e.g. for the construction of field emission displays and light emitting diodes. In this work, the phosphor was synthesized by the solgel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS) methods. They proved to be very good structural properties of the material and identified negligible impurities from the technological process. The decomposition of the surface of the nanocrystals was found but this did not decrease the spectral features of the compound. The analysis of the XPS O2p lines revealed contributions of two kinds of bonds: terminal and equatorial ones, in the ratio of 2/4. They are separated by 1.2 eV what is in agreement with the observed absorption spectra. A presence of the decomposed layers may produce asymmetric widening of the emission spectra towards a lower energy.

  6. Optical and magneto-optical properties of Co-doped CeO{sub 2??} films in the 0.5 to 4?eV range

    SciTech Connect (OSTI)

    Veis, M., E-mail: veis@karlov.mff.cuni.cz; Kucera, M.; Zahradnik, M.; Antos, R. [Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 12116 Prague (Czech Republic); Mistrik, J. [Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice (Czech Republic); Bi, Lei; Kim, Hyun-Suk; Dionne, G. F.; Ross, C. A. [Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

    2014-05-07T23:59:59.000Z

    Magnetically doped Ce{sub 1?x}Co{sub x}O{sub 2??} (nominal x?=?0.05 and 0.10) films were systematically studied by spectroscopic ellipsometry and magneto-optical spectroscopy. The samples were prepared by pulsed laser deposition on MgO(100) substrates and grew as textured polycrystalline films with thickness between 200 and 750?nm. They exhibited room temperature ferromagnetism and an out-of-plane easy axis attributed to magnetoelastic effects from the in-plane compressive strain. The dispersion of dielectric function of Ce{sub 1?x}Co{sub x}O{sub 2??} films was parametrized by the sum of Tauc-Lorentz and damped Lorentz oscillators and adjusted numerically. Deduced optical band gaps were similar to those of pure CeO{sub 2}, but the Co doping increased the optical absorption. The magneto-optical spectroscopy was carried out in both Faraday and Kerr configurations in the photon energy range from 0.5 to 4?eV, showing a strong dependence of the magneto-optical effect on the Co content near the optical band edge.

  7. Si le vide absolu existe droite du piston A et qu'on l'abandonne lui-mme, ce piston prend une vitesse qui crot avec le temps et

    E-Print Network [OSTI]

    Boyer, Edmond

    83 Si le vide absolu existe à droite du piston A et qu'on l'abandonne à lui-même, ce piston prend, on imprime au piston A une vitesse progressivement croissante et dirigée de manière à dilater le gaz. Quel que soit le mouvement imprimé à ce piston, pourvu que sa vitesse varie d'une manière continue, le vide

  8. In Situ Studies of the Active Sites for the Water Gas Shift Reaction over Cu-CeO2 Catalysts: Complex Interaction Between Metallic Copper and Oxygen Vacancies of Ceria

    SciTech Connect (OSTI)

    Wang,X.; Rodriguez, J.; Hanson, J.; Gamarra, D.; Martinez-Arias, A.; Fernandez-Garcia, M.

    2006-01-01T23:59:59.000Z

    New information about the active sites for the water gas shift (WGS) reaction over Cu-CeO{sub 2} systems was obtained using in-situ, time-resolved X-ray diffraction (TR-XRD), X-ray absorption spectroscopy (TR-XAS, Cu K and Ce L3 edges), and infrared spectroscopy (DRIFTS). Cu-CeO{sub 2} nanoparticles prepared by a novel reversed microemulsion method (doped Ce1-xCuxO2 sample) and an impregnation method (impregnated CuO{sub x}/CeO{sub 2} sample) were studied. The results from all of the samples indicate that both metallic copper and oxygen vacancies in ceria were involved in the generation of active sites for the WGS reaction. Evidence was found for a synergistic Cu-O vacancy interaction. This interaction enhances the chemical activity of Cu, and the presence of Cu facilitates the formation of O vacancies in ceria under reaction conditions. Water dissociation occurred on the O vacancy sites or the Cu-O vacancy interface. No significant amounts of formate were formed on the catalysts during the WGS reaction. The presence of strongly bound carbonates is an important factor for the deactivation of the catalysts at high temperatures. This work identifies for the first time the active sites for the WGS reaction on Cu-CeO{sub 2} catalysts and illustrates the importance of in situ structural studies for heterogeneous catalytic reactions.

  9. The Reaction of bis(1,2,4-tri-t-butylcyclopentadienyl)ceriumbenzyl, Cp'2CeCH2Ph with Methylhalides: a Metathesis Reaction that does not proceed by a Metathesis Transition State

    SciTech Connect (OSTI)

    Werkema, Evan; Andersen, Richard; Maron, Laurent; Eisenstein, Odile

    2009-09-02T23:59:59.000Z

    The experimental reaction between [1,2,4-(Me3C)3C5H2]2CeCH2Ph and CH3X, X = F, Cl, Br, and I, yields the metathetical exchange products, [1,2,4-(Me3C)3C5H2]2CeX and CH3CH2Ph. The reaction is complicated by the equilibrium between the benzyl derivative and the metallacycle [[1,2,4-(Me3C)3C5H2] [(Me3C)2C5H2C(CH3)2CH2]Ce, plus toluene since the metallacycle reacts with CH3X. Labelling studies show that the methyl group of the methylhalide is transferred intact to the benzyl group. The mechanism, as revealed by DFT calculations on (C5H5)2CeCH2Ph and CH3F, does not proceed by way of a four-center mechanism, (sigma-bond metathesis) but a lower barrier process involves a haptotropic shift of the Cp2Ce fragment so that at the transition state the para-carbon of the benzene ring is attached to the Cp2Ce fragment while the CH2 fragment of the benzyl group attacks CH3F that is activated by coordination to the metal ion. As a result the mechanism is classified as an associative interchange process.

  10. Spectroscopic study of a Cu/CeO{sub 2} catalyst subjected to redox treatments in carbon monoxide and oxygen

    SciTech Connect (OSTI)

    Martinez-Arias, A.; Fernandez-Garcia, M.; Soria, J.; Conesa, J.C. [CSIC, Madrid (Spain). Instituto de Catalisis y Petroleoquimica] [CSIC, Madrid (Spain). Instituto de Catalisis y Petroleoquimica

    1999-03-10T23:59:59.000Z

    Redox processes induced by interaction of a calcined Cu/CeO{sub 2} catalyst with CO and reoxidation with O{sub 2} have been investigated by CO-TPR, EPR, FTIR of adsorbed CO, and XPS. The initial calcined samples shows the presence of dispersed Cu{sup 2+} species, which give rise in the EPR spectrum to signals due to isolated entities, a somewhat more aggregated Cu{sup 2+}-containing phase, and copper ionic pairs, in coexistence with an EPR-silent CuO-type phase, revealed by XPS. A significant reduction of copper is produced already by contact with CO at room temperature, EPR results suggesting that reducibility of Cu{sup 2+} species decreases with their aggregation degree. Simultaneously, the ceria surface is also reduced by this interaction, copper acting as a strong promoter of this process. A singular consequence of the synergistic reduction of both components is observed by subjecting the catalyst to CO at T{sub r} {ge} 473 K, at which the CO adsorption capability of copper is apparently suppressed, in view of the absence of copper carbonyls in the FTIR spectrum. This is attributed to the establishment of electronic interactions between reduced ceria and small metallic copper particles generated by the reduction process. Contact of the CO-reduced sample with O{sub 2} at room or higher temperature produces an important reoxidation of both copper and ceria, revealed by FTIR and EPR. The synergetic effects between copper and ceria in the reduction process and the easy reoxidation of deeply reduced ceria are thought to be crucial to explaining the high catalytic activity shown by this system for CO oxidation.

  11. In partners EXTENSION CE

    E-Print Network [OSTI]

    Ciocan-Fontanine, Ionut

    service Minnesota Local egetables i directors i a n in #12;LOCAL FOOD MARKET IN HEALTHCARE FRUITS AND VEGETABLES IN HEALTHCARE INSTITUTIONS BASED ON A SURVEY OF FOOD SERVICE DIRECTORS IN BECKER of Minnesota Extension conducted a survey of food service directors in Becker, Clay, Otter Tail, and Wilkin

  12. Neutron diffraction study of magnetic field induced behavior in the heavy Fermion Ce3Co4Sn13

    SciTech Connect (OSTI)

    Christianson, Andrew D [ORNL; Goremychkin, E. A. [ISIS Facility, Rutherford Appleton Laboratory; Gardner, J. S. [Indiana University; Kang, H. J. [National Institute of Standards and Technology (NIST); Chung, J.-H. [National Institute of Standards and Technology (NIST); Manuel, P. [ISIS Facility, Rutherford Appleton Laboratory; Thompson, J. D. [Los Alamos National Laboratory (LANL); Sarrao, J. L. [Los Alamos National Laboratory (LANL); Lawrence, J. M. [University of California, Irvine

    2008-01-01T23:59:59.000Z

    The specific heat of Ce3Co4Sn13 exhibits a crossover from heavy Fermion behavior with antiferromagnetic correlations at low field to single impurity Kondo behavior above 2 T. We have performed neutron diffraction measurements in magnetic fields up to 6 Tesla on single crystal samples. The (001) position shows a dramatic increase in intensity in field which appears to arise from static polarization of the 4f level and which at 0.14 K also exhibits an anomaly near 2T reflecting the crossover to single impurity behavior.

  13. Synthesis and crystal structure of the isotypic rare earth thioborates Ce[BS{sub 3}], Pr[BS{sub 3}], and Nd[BS{sub 3}

    SciTech Connect (OSTI)

    Hunger, Jens; Borna, Marija [Max Planck Institute for Chemical Physics of Solids, Noethnitzer Strasse 40, D-01187 Dresden (Germany); Kniep, Ruediger, E-mail: kniep@cpfs.mpg.d [Max Planck Institute for Chemical Physics of Solids, Noethnitzer Strasse 40, D-01187 Dresden (Germany)

    2010-03-15T23:59:59.000Z

    The orthothioborates Ce[BS{sub 3}], Pr[BS{sub 3}] and Nd[BS{sub 3}] were prepared from mixtures of the rare earth (RE) metals together with amorphous boron and sulfur summing up to the compositions CeB{sub 3}S{sub 6}, PrB{sub 5}S{sub 9} and NdB{sub 3}S{sub 6}. The following preparation routes were used: solid state reactions with maximum temperatures of 1323 K and high-pressure high-temperature syntheses at 1173 K and 3 GPa. Pr[BS{sub 3}] and Nd[BS{sub 3}] were also obtained from rare earth chlorides RECl{sub 3} and sodium thioborate Na{sub 2}B{sub 2}S{sub 5} by metathesis type reactions at maximum temperatures of 1073 K. The crystal structure of the title compounds was determined from X-ray powder diffraction data. The thioborates are isotypic and crystallize in the orthorhombic spacegroup Pna2{sub 1} (No. 33; Z=4; Ce: a=7.60738(6)A, b=6.01720(4)A, c=8.93016(6)A; Pr: a=7.56223(4)A, b=6.00876(2)A, c=8.89747(4)A; Nd: a=7.49180(3)A, b=6.00823(2)A, c=8.86197(3)A) . The crystal structures contain isolated [BS{sub 3}]{sup 3-} groups with boron in trigonal-planar coordination. The sulfur atoms form the vertices of undulated kagome nets, which are stacked along [100] according to the sequence ABAB. Within these nets every second triangle is occupied by boron and the large hexagons are centered by rare earth ions, which are surrounded by overall nine sulfur species. - Abstract: Graphical Abstract Legend (TOC Figure): Table of Contents Figure The isotypic orthothioborates Ce[BS{sub 3}], Pr[BS{sub 3}] and Nd[BS{sub 3}] were prepared using different preparation routes. The crystal structure of the title compounds was determined from X-ray powder diffraction data. The crystal structures contain isolated [BS{sub 3}]{sup 3-} groups with boron in trigonal-planar coordination. The sulfur atoms form the vertices of corrugated kagome nets (sketched with blue dotted lines), which are stacked along [100] according to the sequence ABAB. Within these nets every second triangle is occupied by boron and the large hexagons are centered by rare earth ions, which are surrounded by overall nine sulfur species.

  14. PoPulation Differentiation anD raPiD evolution of egg Color in aCCorDanCe with Solar raDiation

    E-Print Network [OSTI]

    Lahti, David C.

    PoPulation Differentiation anD raPiD evolution of egg Color in aCCorDanCe with Solar raDiation Davi, . Diferenciación entre Poblaciones y Evolución Rápida del Color de los Huevos de Acuerdo a la Radiación Solar Uy C P' R d Pm wb, ://www.j. m/I.. DOI: 10.1525/k.2008.07033DOI: 10.1525/k.2008.07033 Bird egg color

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  1. Data:Ce1f8b49-9c33-442f-85b3-202cdfe22397 | Open Energy Information

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  12. A novel yellow-emitting SrAlSi{sub 4}N{sub 7}:Ce{sup 3+} phosphor for solid state lighting: Synthesis, electronic structure and photoluminescence properties

    SciTech Connect (OSTI)

    Ruan, Jian [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Laboratory of Glasses and Nanostructured Functional Materials, 122 Luoshi Road, Wuhan, Hubei 430070 (China); Xie, Rong-Jun, E-mail: Xie.Rong-Jun@nims.go.jp [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Funahashi, Shiro [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Tanaka, Yoshinori [Green Computational Materials Science Group, Global Research Center for Environment and Energy based on Nanomaterials Science (Green), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044 (Japan); Takeda, Takashi; Suehiro, Takayuki; Hirosaki, Naoto [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Li, Yuan-Qiang [Dow Electronic Materials, 201 Washington Road, Princeton, NJ 08540 (United States)

    2013-12-15T23:59:59.000Z

    Ce{sup 3+}-doped and Ce{sup 3+}/Li{sup +}-codoped SrAlSi{sub 4}N{sub 7} phosphors were synthesized by gas pressure sintering of powder mixtures of Sr{sub 3}N{sub 2}, AlN, ?-Si{sub 3}N{sub 4}, CeN and Li{sub 3}N. The phase purity, electronic crystal structure, photoluminescence properties of SrAlSi{sub 4}N{sub 7}:Ce{sup 3+}(Ce{sup 3+}/Li{sup +}) were investigated in this work. The band structure calculated by the DMol{sup 3} code shows that SrAlSi{sub 4}N{sub 7} has a direct band gap of 3.87 eV. The single crystal analysis of Ce{sup 3+}-doped SrAlSi{sub 4}N{sub 7} indicates a disordered Si/Al distribution and nitrogen vacnacy defects. SrAlSi{sub 4}N{sub 7} was identified as a major phase of the fired powders, and Sr{sub 5}Al{sub 5}Si{sub 21}N{sub 35}O{sub 2} and AlN as minor phases. Both Ce{sup 3+} and Ce{sup 3+}/Li{sup +} doped SrAlSi{sub 4}N{sub 7} phosphors can be efficiently excited by near-UV or blue light and show a broadband yellow emission peaking around 565 nm. A highest external quantum efficiency of 38.3% under the 450 nm excitation was observed for the Ce{sup 3+}/Li{sup +}-doped SrAlSi{sub 4}N{sub 7} (5 mol%). A white light LED lamp with color temperature of 6300 K and color rendering index of Ra=78 was achieved by combining Sr{sub 0.97}Al{sub 1.03}Si{sub 3.997}N/94/maccounttest14=t0005{sub 1}8193 {sub 7}:Ce{sup 3+}{sub 0.03} with a commercial blue InGaN chip. It indicates that SrAlSi{sub 4}N{sub 7}:Ce{sup 3+} is a promising yellow emitting down-conversion phosphor for white LEDs. - Graphical abstract: One-phosphor converted white light-emitting diode (LED) was fabricated by combining a blue LED chip and a yellow-emitting SrAlSi4N7:Ce{sup 3+} phosphor (see inset), which has the color rendering index of 78 and color temperature of 6300 K. - Highlights: We reported a new yellow nitride phosphor suitable for solid state lighting. We solved the crystal structure and evidenced a disordered Si/Al distribution. We fabricated a high color rendering white LEDs by using a single SrAlSi4N7:Ce.

  13. Insensitivity of the pressure dependences of characteristic energy scales in Ce1xRxCoIn? (R=Yb,Y,Gd) to the electronic configuration of the rare-earth ion

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

    White, B. D.; Hamlin, J. J.; Huang, K.; Shu, L.; Lum, I. K.; Baumbach, R. E.; Janoschek, M.; Maple, M. B.

    2012-09-01T23:59:59.000Z

    Cooperative Ce and Yb valence fluctuations have recently been proposed as the mechanism responsible for stabilizing correlated electron phenomena in Ce??xYbxCoIn? over an unexpectedly large range of concentrations. In order to better understand the origins and character of this stability, we have measured the effect of applied pressure on relevant energy scales such as the superconducting critical (Tc) and Kondo-lattice coherence (T*) temperatures of Ce??xRxCoIn? with R=Yb, Y, and Gd. Electrical resistivity measurements were performed under applied pressure on samples doped with intermediate-valent Yb and stable-valent Gd and Y, and the responses of Tc and T* to increased pressure in these systems are compared. The character of Tc(P) and T*(P) in Ce??xRxCoIn? depends only on their respective ambient-pressure values Tc(0) and T*(0), independent of the electronic configuration of R or concentration x. The consequences of this result are discussed within the context of possible cooperative valence fluctuations in Ce??xYbxCoIn?.

  14. CO chemisorption effects on cerium initial and final states in the core-level photoelectron spectrum of CeIr/sub 2/

    SciTech Connect (OSTI)

    Lindquist, J.M.; Hemminger, J.C.

    1987-01-01T23:59:59.000Z

    Carbon monoxide (CO) adsorption on the mixed-valence compound CeIr/sub 2/ has been studied by X-ray photoelectron spectroscopy. CO adsorption on this surface is predominantly molecular. We show that changes in the cerium 3d spectrum upon CO chemisorption may be separated into initial- and final-state effects. In the initial state, stabilization of the (Ce)(5d6s)34f1 configuration occurs due to an increase in effective nuclear charge on the cerium atom. This leads to a decrease in f0 intensity in the recorded spectrum. Increased f-electron repulsion in the final state raises the energy of the f2 final-state configuration and causes a 2.2-eV shift to higher binding energy of the 3d5/2f2 peak. The 0.5-eV binding energy shifts of the 3d5/2f1 and 3d3/2f1 peaks along with the 2.2-eV shift of the 3d5/2f2 peak indicate that the f orbitals are quite-sensitive indicators of the surface oxidation state in this compound.

  15. Synthesis of solid solution Er{sub 2-x}Ce{sub x}W{sub 3}O{sub 12} and studies of their thermal expansion behavior.

    SciTech Connect (OSTI)

    Wu, M. M.; Cheng, Y. Z.; Peng, J.; Xiao, X. L.; Chen, D. F.; Kiyanagi, R.; Fieramosca, J. S.; Short, S.; Jorgensen, J.; Hu, Z. B.; Graduate Univ. Chinese Academy of Sciences; China Inst. of Atomic Energy

    2007-01-30T23:59:59.000Z

    The syntheses and structures of Er{sub 2-x}Ce{sub x}W{sub 3}O{sub 12} were studied. It was found that pure phases could form only for 0.0 {le} x {le} 0.4 and 1.5 {le} x {le} 2.0. Compounds with 0 {le} x {le} 0.4 have the hydrated orthorhombic structure at room temperature and transform to unhydrated orthorhombic one above 135 C whereas samples with 1.5 {le} x {le} 2.0 crystallize in monoclinic structure. Thermal expansion properties of Er{sub 2-x}Ce{sub x}W{sub 3}O{sub 12} were studied with high temperature X-ray powder diffraction. Samples with 0 {le} x {le} 0.4 exhibit negative thermal expansion in temperature range of 200-800 C and higher cerium content leads to more negative thermal expansion coefficient. However, compounds with 1.5 {le} x {le} 2.0 show positive thermal expansion owing to the edge-sharing polyhedra.

  16. X-ray absorption studies of the local structure and f-level occupancy in CeIr(1-x)Rh(x)In(5)

    SciTech Connect (OSTI)

    Daniel, M.; Han, S.-W.; Booth, C.H.; Cornelius, A.L.; Pagliuso, P.G.; Sarrao, J.L.; Thompson, J.D.

    2004-04-15T23:59:59.000Z

    The CeIr{sub 1-x}Rh{sub x}In{sub 5} series exhibits a range of interesting phenomena, including heavy-fermion superconductivity, non-Fermi liquid behavior, and concomitant antiferromagnetism (AF) and superconductivity (SC). In the low-Rh concentration range (0.1 {ge} x {ge} 0.5), specific heat measurements show a broad anomaly, suggestive of gross phase separation. We have performed x-ray absorption experiments at the Ce L{sub III}, Ir L{sub III}, and Rh K-edges as a function of Rh concentration and temperature. X-ray absorption near-edge structure (XANES) measurements indicate that cerium is close to trivalent in this system, with no measurable change with temperature from 20-300 K, consistent with a heavy-fermion material. Extended x-ray absorption fine structure (EXAFS) measurements as a function of temperature from all measured edges indicate the local crystal structure of all samples is well ordered, with no gross phase separation observed, even for samples with x = 0.125 and x = 0.25. These results therefore suggest that the anomalous specific heat behavior in the 0.1 {ge} x {ge} 0.5 range have some other explanation, and some possibilities are discussed.

  17. Unraveling the Active Site in Copper-Ceria Systems for the Water-Gas Shift Reaction: In Situ Characterization of an Inverse Powder CeO2-x/CuO-Cu Catalyst

    SciTech Connect (OSTI)

    Barrio, L.; Estrella, M; Zhou, G; Wen, W; Hanson, J; Hungria, A; Hornes, A; Fernandez-Garcia, M; Martinez-Arias, A; Rodriguez, J

    2010-01-01T23:59:59.000Z

    An inverse powder system composed of CeO{sub 2} nanoparticles dispersed over a CuO-Cu matrix is proposed as a novel catalyst for the water-gas shift reaction. This inverse CeO{sub 2}/CuO-Cu catalyst exhibits a higher activity than standard Cu/CeO{sub 2} catalysts. In situ synchrotron characterization techniques were employed to follow the structural changes of CeO{sub 2}/CuO-Cu under reaction conditions. Time-resolved X-ray diffraction experiments showed the transformation of CuO to metallic Cu via a Cu{sub 2}O intermediate. Short-order structural changes were followed by pair distribution function analysis and corroborated the results obtained by diffraction. Moreover, X-ray absorption spectroscopy also revealed oxidation state changes from Cu{sup 2+} to Cu{sup 0} and the partial reduction of CeO{sub x} nanoparticles. The activity data obtained by mass spectrometry revealed that hydrogen production starts once the copper has been fully reduced. The strong interaction of ceria and copper boosted the catalytic performance of the sample. The inverse catalyst was active at low temperatures, stable to several reaction runs and to redox cycles. These characteristics are highly valuable for mobile fuel cell applications. The active phases of the inverse CeO{sub 2}/CuO-Cu catalyst are partially reduced ceria nanoparticles strongly interacting with metallic copper. The nature and structure of the ceria nanoparticles are of critical importance because they are involved in processes related to water dissociation over the catalyst surface.

  18. Unraveling the Active Site in Copper-ceria Systems for the Water Gas Shift Reaction: In-situ Characterization of an Inverse Powder CeO2-x/CuO-Cu Catalyst

    SciTech Connect (OSTI)

    Rodriguez, J.A.; Barrio, L.; Estrella, M.; Zhou, G.; Wen, W.; Hanson, J.C.; Hungra, A.B.; Horns, A.; Fernndez-Garca, M.; Arturo Martnez-Arias, A.

    2010-03-04T23:59:59.000Z

    An inverse powder system composed of CeO{sub 2} nanoparticles dispersed over a CuO-Cu matrix is proposed as a novel catalyst for the water-gas shift reaction. This inverse CeO{sub 2}/CuO-Cu catalyst exhibits a higher activity than standard Cu/CeO{sub 2} catalysts. In situ synchrotron characterization techniques were employed to follow the structural changes of CeO{sub 2}/CuO-Cu under reaction conditions. Time-resolved X-ray diffraction experiments showed the transformation of CuO to metallic Cu via a Cu{sub 2}O intermediate. Short-order structural changes were followed by pair distribution function analysis and corroborated the results obtained by diffraction. Moreover, X-ray absorption spectroscopy also revealed oxidation state changes from Cu{sup 2+} to Cu{sup 0} and the partial reduction of CeOx nanoparticles. The activity data obtained by mass spectrometry revealed that hydrogen production starts once the copper has been fully reduced. The strong interaction of ceria and copper boosted the catalytic performance of the sample. The inverse catalyst was active at low temperatures, stable to several reaction runs and to redox cycles. These characteristics are highly valuable for mobile fuel cell applications. The active phases of the inverse CeO{sub 2}/CuO-Cu catalyst are partially reduced ceria nanoparticles strongly interacting with metallic copper. The nature and structure of the ceria nanoparticles are of critical importance because they are involved in processes related to water dissociation over the catalyst surface.

  19. The chemical stability and conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{sigma}} proton-conductive electrolyte for SOFC

    SciTech Connect (OSTI)

    Xie Kui [Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); Yan Ruiqiang [Department of Materials Engineering, Taizhou University, Linhai, Zhejiang 317000 (China); Xu Xiaoxiang [School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST (United Kingdom); Liu Xingqin, E-mail: xqliu@ustc.edu.cn [Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); Meng Guangyao [Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China)

    2009-07-01T23:59:59.000Z

    BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} and BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{delta}} (x = 0.1, 0.15, 0.2, 0.25, 0.3, 0.35) were prepared by a solid-state reactions. It was found that the BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} samples decomposed into CeO{sub 2} and BaCO{sub 3} after being exposed in the atmosphere (3% CO{sub 2} + 3% H{sub 2}O + 94% N{sub 2}) at 700 deg. C for 10 h. However, samples containing Nb remains unchanged in the same conditions, demonstrating a better stability in the presence of CO{sub 2} and H{sub 2}O. The conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{delta}} increased with the increase of Y content (x {<=} 0.30), and the highest value was observed at x = 0.30 where a significant decrease in conductivity took place at x = 0.35. The conductivity of BaCe{sub 0.6}Y{sub 0.3}Nb{sub 0.1}O{sub 3-{delta}} reaches 0.01 S/cm in humid hydrogen at 700 deg. C, slight lower than BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}}, 0.012 S/cm in the same conditions. Fuel cell with BaCe{sub 0.6}Y{sub 0.3}Nb{sub 0.1}O{sub 3-{delta}} as-prepared was successfully prepared and humidified hydrogen was supplied as fuels in evaluating the fuel cell performance. The open circuit voltage, peak power density and interfacial resistance at 700 deg. C were 1.02 V, 345 mW/cm{sup 2} and 0.27 {Omega} cm{sup 2}, respectively.

  20. Quaternary Germanides Formed in Molten Aluminum: Tb2NiAl4Ge2 and Ce2NiAl6-xGe4-y (x 0.24, y 1.34)

    E-Print Network [OSTI]

    Trikalitis, Pantelis N.

    Quaternary Germanides Formed in Molten Aluminum: Tb2NiAl4Ge2 and Ce2NiAl6-xGe4-y (x 0.24, y 1 gebildete quaternäre Germanide: Tb2NiAl4Ge2 und Ce2NiAl6-xGe4-y (x 0.24, y 1.34) Inhaltsübersicht. Die ebenfalls die Introduction The use of metal fluxes in exploratory synthesis presents significant synthetic

  1. Solid state reactions of nanocrystalline Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} mixed oxide with high surface area silica in oxidizing and reducing atmosphere

    SciTech Connect (OSTI)

    Malecka, Malgorzata A. [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw 2 (Poland); Kepinski, Leszek, E-mail: L.Kepinski@int.pan.wroc.pl [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw 2 (Poland)

    2012-08-15T23:59:59.000Z

    The interaction of nanocrystalline Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} mixed oxide with a high surface amorphous silica support in an oxidizing and reducing atmosphere was studied by XRD, HRTEM, SAED, SEM and BET techniques. The Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} system shows very high structural and size stability in the oxidizing atmosphere up to 1000 Degree-Sign C, but in hydrogen spreading of the oxide onto silica occurs at temperatures above 800 Degree-Sign C. In the oxidizing atmosphere stability of the mixed oxide is limited by extraction of ytterbium from the oxide driven by a tendency to form ytterbium silicates. A new polymorph of Yb silicate, isomorphic with y-Y{sub 2}Si{sub 2}O{sub 7} (yttrialite), has been identified in the samples containing the mixed Ce-Yb oxide. The absence of y-Yb{sub 2}Si{sub 2}O{sub 7} silicate in the Yb{sub 2}O{sub 3}-SiO{sub 2} samples treated in similar conditions indicates that Ce{sup 4+} ions are needed to stabilize the structure. - Graphical abstract: Structure evolution of nano-Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} in air and in H{sub 2}. Highlights: Black-Right-Pointing-Pointer Nano-Ce{sub 0.50}Yb{sub 0.50}O{sub 1.75} on SiO{sub 2} is stable in air up to 1000 Degree-Sign C but spreads in hydrogen at 800 Degree-Sign C. Black-Right-Pointing-Pointer Formation of Yb silicates determines the stability of Ce{sub 0.50}Yb{sub 0.50}O{sub 1.75} at high temperatures. Black-Right-Pointing-Pointer New, y-Yb{sub 2}Si{sub 2}O{sub 7} silicate (yttrialite type) forms in Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} in H{sub 2} at 1100 Degree-Sign C.

  2. Role of metal components in Pd?Cu bimetallic catalysts supported on CeO2 for the oxygen-enhanced water gas shift

    SciTech Connect (OSTI)

    Kugai, J.; Miller, J. T.; Guo, N.; Song, C. (Chemical Sciences and Engineering Division); ( PSC-USR); (Penn State Univ.)

    2011-06-01T23:59:59.000Z

    Catalytic hydrogen production and CO removal in a post-reforming process are critical for low-temperature fuel cell applications. The present study aims at clarifying the role of metal components in bimetallic catalysts for oxygen-enhanced water gas shift (OWGS), wherein a small amount of O{sub 2} is added to H{sub 2}-rich reformate gas to enhance CO shift. Among CeO{sub 2}-supported bimetallic catalysts, Pd-Cu and Pt-Cu combinations were found to show strong synergetic promoting effect in OWGS, which leads to much higher CO conversion and higher H{sub 2} yield than WGS at low temperature around 250 C. Temperature programmed reduction (TPR) showed strong interaction between Pd and Cu in Pd-Cu/CeO{sub 2} by a single reduction peak in contrast to multiple peaks on monometallic Cu/CeO{sub 2}. Extended X-ray absorption fine structure (EXAFS) analysis revealed that such bimetallic Pd-Cu and Pt-Cu form alloy nanoparticles, where noble metal is mainly surrounded by Cu atoms. Oxygen storage capacity (OSC) measurements point to higher resistance of Pd-Cu to oxidation indicating that Pd keeps Cu in reduced state in air pulse condition. From kinetic study, Pd in Pd-Cu was found to promote CO shift, rather than CO oxidation by increasing the number of active sites and by suppressing H{sub 2} activation (that is inherent to monometallic Pd), which minimizes both the inhibition effect of H{sub 2} and the loss of H{sub 2} by oxidation in OWGS. Transient response technique revealed that Cu in Pd-Cu enhances desorption of strongly chemisorbed CO{sub 2} on catalyst surface in contrast to very slow CO{sub 2} desorption from surface of monometallic Pd. Thus, the excellent OWGS activity of Pd-Cu catalyst has been attributed to the complementary roles of the two metals for enhancing CO shift, which is realized by its alloy structure and the accompanying strong interaction between metal components.

  3. Effects of Ce, Y and Mo Addition on the Stress Accelerated Oxidation of Austenitic Stainless Steel in Oxygenated High Temperature Water

    SciTech Connect (OSTI)

    Shengchun Wang; Nobuaki Kawaguchi; Tetsuo Shoji [Fracture Research Institute, Graduate School of Engineering, Tohoku University, Aramaki Aoba 01, Aoba-ku, Sendai 980-8579 (Japan)

    2004-07-01T23:59:59.000Z

    Based upon the recent progress in mechanistic understanding of intergranular stress corrosion cracking (IGSCC) of austenitic stainless steels in high temperature water in light water reactor (LWR), the effects of Ce, Y, and Mo addition on oxidation kinetics under a tensile stress condition was investigated. Minor impurity of P was also studied. A kind of circumferentially notched tensile specimen was prepared to simulate the crack tip stress field. The notched specimens of different materials studied were applied with an almost constant load in simulated boiling water reactor (BWR) water. The oxidation was examined by the specimen cross section. It was shown that these elements have quite clear effects on the metal oxidation and alloying element distribution in the oxide layer. (authors)

  4. Data:Ef0bd4a8-7702-40c5-b219-2bb62c8ce86b | Open Energy Information

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  11. Evidence for anisotropic triplet superconductor order parameter in half metallic ferromagnetic La_0.7Ca_0.3MnO_3 proximity coupled to superconducting Pr_1.85Ce_0.15CuO_4

    E-Print Network [OSTI]

    Kalcheim, Y.; Millo, O.; Egilmez, M.; Robinson, J. W. A.; Blamire, M. G.

    2012-03-07T23:59:59.000Z

    Scanning tunneling spectroscopy measurements performed on La_0.7Ca_0.3MnO_3 (LCMO) films epitaxially grown on Pr_1.85Ce_0.15CuO_4 (PCCO) reveal localized penetration of superconductivity into the LCMO up to distances much larger than is possible...

  12. Gorur D, Rasmussen CE. Dirichlet process Gaussian mixture models: Choice of the base distribution. JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY 25(4): 615626 July 2010/DOI 10.1007/s11390-010-1051-1

    E-Print Network [OSTI]

    Edinburgh, University of

    G¨or¨ur D, Rasmussen CE. Dirichlet process Gaussian mixture models: Choice of the base distribution Rasmussen2,3 1 Gatsby Computational Neuroscience Unit, University College London, London WC1N 3AR, U.K. 2 Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, U.K. 3 Max Planck Institute

  13. En forkortet udgave af denne kommentar blev bragt i Berlingske Tidende, 2. sektion (Magasin s. 14), lrdag den 21. januar 2006 (online her: http://www.nbi.dk/~emmeche/cePubl/2006a.forskpol.html).

    E-Print Network [OSTI]

    Emmeche, Claus

    ), lørdag den 21. januar 2006 (online her: http://www.nbi.dk/~emmeche/cePubl/2006a gang præges af den lineære models logik, og at de teknologiske, såkaldt våde områder af forskningen

  14. College of AgriCulturAl SCienCeS AgriCulturAl reSeArCh And CooperAtive extenSion Access and AllocAtion of

    E-Print Network [OSTI]

    Boyer, Elizabeth W.

    College of AgriCulturAl SCienCeS · AgriCulturAl reSeArCh And CooperAtive extenSion Access and Alloc- gation, recreation, and hydro- electric power generation, do not involve withdrawing water from its level of government is best suited to regulate water use. Predictions that climate change will influence

  15. CO Oxidation on Inverse CeOx/Cu(111) Catalysts: High Catalytic Activity and Ceria-Promoted Dissociation of O2

    SciTech Connect (OSTI)

    F Yang; J Graciani; J Evans; P Liu; J Hrbek; J Fdez. Sanz; J Rodriguez

    2011-12-31T23:59:59.000Z

    A Cu(111) surface displays a low activity for the oxidation of carbon monoxide (2CO + O{sub 2} {yields} 2CO{sub 2}). Depending on the temperature, background pressure of O{sub 2}, and the exposure time, one can get chemisorbed O on Cu(111) or a layer of Cu{sub 2}O that may be deficient in oxygen. The addition of ceria nanoparticles (NPs) to Cu(111) substantially enhances interactions with the O{sub 2} molecule and facilitates the oxidation of the copper substrate. In images of scanning tunneling microscopy, ceria NPs exhibit two overlapping honeycomb-type moire structures, with the larger ones (H{sub 1}) having a periodicity of 4.2 nm and the smaller ones (H{sub 2}) having a periodicity of 1.20 nm. After annealing CeO{sub 2}/Cu(111) in O{sub 2} at elevated temperatures (600-700 K), a new phase of a Cu{sub 2}O{sub 1+x} surface oxide appears and propagates from the ceria NPs. The ceria is not only active for O{sub 2} dissociation, but provides a much faster channel for oxidation than the step edges of Cu(111). Exposure to CO at 550-750 K led to a partial reduction of the ceria NPs and the removal of the copper oxide layer. The CeO{sub x}/Cu(111) systems have activities for the 2CO + O{sub 2} {yields} 2CO{sub 2} reaction that are comparable or larger than those reported for surfaces of expensive noble metals such as Rh(111), Pd(110), and Pt(100). Density-functional calculations show that the supported ceria NPs are able to catalyze the oxidation of CO due to their special electronic and chemical properties. The configuration of the inverse oxide/metal catalyst opens new interesting routes for applications in catalysis.

  16. Effect of synthesis conditions on the nanopowder properties of Ce{sub 0.9}Zr{sub 0.1}O{sub 2}

    SciTech Connect (OSTI)

    Zimicz, M.G.; Fabregas, I.O.; Lamas, D.G. [CINSO (Centro de Investigaciones en Solidos) CONICET-CITEFA J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires (Argentina)] [CINSO (Centro de Investigaciones en Solidos) CONICET-CITEFA J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires (Argentina); Larrondo, S.A., E-mail: susana@di.fcen.uba.ar [Laboratorio de Procesos Cataliticos, Departamento de Ingenieria Quimica, Facultad de Ingenieria, Universidad de Buenos Aires, Pabellon de Industrias, Ciudad Universitaria, 1428 Buenos Aires (Argentina)

    2011-06-15T23:59:59.000Z

    Graphical abstract: . The synthesis of nanocrystalline Ce{sub 0.9}Zr{sub 0.1}O{sub 2} powders via the gel-combustion method, using different fuels, and following either stoichiometric or non-stoichiometric pH-controlled routes is investigated. Research highlights: {yields} All samples exhibited the fluorite-type crystal structure, nanometric average crystallite size and negligible carbon content. {yields} Synthesis conditions strongly affect the average crystallite size, the degree of agglomeration, the specific surface area and the pore volume. {yields} Our results indicate that, by controlling the synthesis conditions it is possible to obtain solids with custom-made morphological properties. -- Abstract: In this work, the synthesis of nanocrystalline Ce{sub 0.9}Zr{sub 0.1}O{sub 2} powders via the gel-combustion method, using different fuels, and following either stoichiometric or non-stoichiometric pH-controlled routes is investigated. The objective is to evaluate the effect of synthesis conditions on the textural and morphological properties, and the crystal structure of the synthesized materials. The solids were characterized by nitrogen physisorption, Scanning Electron Microscopy (SEM), X-ray powder diffraction (XPD), and Carbon-Hydrogen-Nitrogen Elemental Analysis (CHN). All the powders exhibited nanometric crystallite size, fluorite-type structure and negligible carbon content. Synthesis conditions strongly affect the average crystallite size, the degree of agglomeration, the specific surface area and the pore volume. Our results indicate that, by controlling the synthesis conditions it is possible to obtain solids with custom-made morphological properties.

  17. Environmental Law in Ukraine: From the Roots to the Bud

    E-Print Network [OSTI]

    Sak, Pamela Bickford

    1993-01-01T23:59:59.000Z

    power to deny the construction of new plants. Yuri Shcherbak explains that [it] is impossible [to construct nuclear

  18. Ukraine's Military Role in the Black Sea Region

    E-Print Network [OSTI]

    Coffman, Amy Beth; Crump, James Andrew; Dickson, Robbi K.; Mueller, Meaghan; Pulis, Sarah L.

    2010-01-01T23:59:59.000Z

    the territorial sea; protection of merchant fleet, sea oil and gas industry and other state activity in the sea; assistance to the Army in their conduct of operations (military actions) at sea directions; participation in peacekeeping operations. 3...

  19. alushta crimea ukraine: Topics by E-print Network

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

    Spatial Data Analysis and Modeling of Radioactively-Contaminated Territories: Lessons Learned from Chernobyl Environmental Management and Restoration Websites Summary: nuclear...

  20. Ukraine Kievenergo district heating project. Volume 1. Export trade information

    SciTech Connect (OSTI)

    NONE

    1997-04-01T23:59:59.000Z

    This study, conducted by Joseph Technolgoy Corporation, was funded by the U.S. Trade and Development Agency. The purpose of this study was directed toward increasing the heat capacity, reducing fuel costs and import requirements, bringing about energy efficiency in the Kiev District Heating (DH) system; improving environmental conditions in affected areas; and supporting the strengthening and restructuring of Kiev, DH institutions and development of the DH sector. The report lists project risks and offers recommendations to minimize these risks. Also included are detailed cost estimates and financial analyses. The report is divided into the following sections: (1) Acknowledgement, (2) Project Summary, (3) Abbreviations, (4) I. Sector Background and Objectives, (5) II. The Project, (6) III. Implementing Agencies, (7) IV. Financial Aspects, (8) V. Project Benefits and Risks, (9) VI. Agreements to be Reached and Recommendations, (10) Annexes.

  1. NNSA Supports Permanent Threat Reduction in Ukraine through Alternative

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recovery challengeMultiscaleLogosAdministrationNetworkNuclearNational

  2. Ukraine-Enhancing Capacity for Low Emission Development Strategies...

    Open Energy Info (EERE)

    13 countries, including Albania, Bangladesh, Colombia, Costa Rica, Gabon, Indonesia, Kenya, Macedonia, Mexico, Moldova, the Philippines, Serbia, and Vietnam. Fact Sheet...

  3. External dose assessment in the Ukraine following the Chernobyl accident.

    E-Print Network [OSTI]

    Frazier, Remi Jordan Lesartre

    2014-01-01T23:59:59.000Z

    ??While the physiological effects of radiation exposure have been well characterized in general, it remains unclear what the relationship is between large-scale radiological events and (more)

  4. Ukraine-Climate Technology Initiative Private Financing Advisory Network

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTagusparkCalculator Jump to: navigation,UTEK JumpBid(CTI PFAN)(CTI

  5. Ukraine-World Bank Climate Projects | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTagusparkCalculator Jump to: navigation,UTEK JumpBid(CTIdatabase[1]

  6. Ukraine-Clean Technology Fund (CTF) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop,Save Energy Now Jump

  7. Ukraine-Enhancing Capacity for Low Emission Development Strategies

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop,Save Energy Now Jump(EC-LEDS) | Open Energy Information LEDS[1]

  8. Ukraine-GTZ Climate Oriented Mobility | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop,Save Energy Now Jump(EC-LEDS) | Open Energy Information

  9. Ukraine-UNEP Green Economy Advisory Services | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop,Save Energy Now Jump(EC-LEDS) | Open Energy InformationUNEP

  10. US Energy Secretary Bodman Meets with Ukraine President Viktor Yuschenko |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists' Research Petroleum ReserveDepartment of Energy AtNotice forofPipeline

  11. Development of the Electricity Carbon Emission Factors for Ukraine | Open

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Power Basics (The following text09-0018-CXBasinDeseretDevelopingthe

  12. Instrument Development and Gamma Spectroscopy with Strontium Iodide

    SciTech Connect (OSTI)

    Cherepy, Nerine [Lawrence Livermore National Laboratory (LLNL); Payne, Stephen A. [Lawrence Livermore National Laboratory (LLNL); Sturm, Benjamin [Lawrence Livermore National Laboratory (LLNL); Drury, Owen [Lawrence Livermore National Laboratory (LLNL); ONeal, S P [Lawrence Livermore National Laboratory (LLNL); Thelin, P [Lawrence Livermore National Laboratory (LLNL); Shah, Kanai [Radiation Monitoring Devices, Watertown, MA; Hawrami, Rastgo [Fisk University, Nashville, TN; Momayezi, M [Bridgeport Instruments, Austin TX; Hurst, B. [Bridgeport Instruments, Austin TX; Wiggen, B. [Fisk University, Nashville, TN; Bhattacharya, P. [Fisk University, Nashville, TN; Burger, Arnold [Fisk University, Nashville, TN; Boatner, Lynn A [ORNL; Ramey, Joanne Oxendine [ORNL

    2012-01-01T23:59:59.000Z

    Development of the Europium-doped Strontium Iodide scintillator, SrI2(Eu), involves advances in crystal growth, optics and readout methodology for prototype detectors. We have demonstrated energy resolution of 3% at 662 keV for a 26 cm3 SrI2(Eu) crystal, which is comparable to the performance obtained with Cerium-doped Lanthanum Bromide of equivalent size. Compared to standard analog readout, use of a digital readout method allows improved energy resolution to be obtained with large-volume SrI2(Eu) crystals. Comparative gamma spectra acquired with LaBr3(Ce) and NaI(Tl) quantitatively depict the value of the high resolution and low intrinsic radioactivity of SrI2(Eu) in discriminating closely spaced gamma lines for radioisotope identification applications.

  13. TRENDING UKRAINE UPRISING (/TOPICS/TOPIC/EVENT/UKRAINE-UPRISING.HTML) CAMPAIGN FINANCE (/TOPICS/TOPIC/ISSUE/CAMPAIGN-FINANCE.HTML)

    E-Print Network [OSTI]

    Rohs, Remo

    ice caps and ocean waters expand, surging seawater could flood the famed beach and swamp Rudisill/o/madeline-ostrander.html) February 27, 2014 6:00AM ET| | New research could help the city anticipate the impact of rising sea levels heard." The science has since proved her point. Multiple studies predict that as global warming melts

  14. fabrication-polybenzimidazole-sri | netl.doe.gov

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

    conditions relevant to the power industry while meeting the U.S. Department of Energy's Carbon Sequestration Program goals of 90 percent CO2 capture at less than a 10 percent...

  15. Energy Efficiency Building Code for Commercial Buildings in Sri Lanka

    SciTech Connect (OSTI)

    Busch, John; Greenberg, Steve; Rubinstein, Francis; Denver, Andrea; Rawner, Esther; Franconi, Ellen; Huang, Joe; Neils, Danielle

    2000-09-30T23:59:59.000Z

    1.1.1 To encourage energy efficient design or retrofit of commercial buildings so that they may be constructed, operated, and maintained in a manner that reduces the use of energy without constraining the building function, the comfort, health, or the productivity of the occupants and with appropriate regard for economic considerations. 1.1.2 To provide criterion and minimum standards for energy efficiency in the design or retrofit of commercial buildings and provide methods for determining compliance with them. 1.1.3 To encourage energy efficient designs that exceed these criterion and minimum standards.

  16. Financial liberalisation in Sri Lanka: an econometric analysis.

    E-Print Network [OSTI]

    Paudel, Ramsh Chandra

    2007-01-01T23:59:59.000Z

    ??This study examines the impact of financial liberalisation on macroeconomic issues such as saving, investment, financial performance, financial sector widening, gross domestic product, and the (more)

  17. Sri Lanka-DLR Cooperation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop, Inc Place: Missouri References: EIASpanishSquare Butte

  18. Sandia National Laboratories: Sandia, SRI International Sign Pact to

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErikGroundbreaking Work on Criegee IntermediatesVertical-AxisNuclearAdvance

  19. Microsoft PowerPoint - CAMD_SRI_2010.pptx

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recovery challenge fundProject Quarterly ReportsMicrofluidicThis DOE

  20. co2-capture-igcc-sri | netl.doe.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 Industrial Carbon Capture and Storage CleanDiscovery of θ1cmarquardt2013 NETL

  1. Microsoft Word - 3m TGM _SRI_07_v4.doc

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recovery challenge fundProject8 - Outline and Description093093High

  2. Microsoft Word - SRI2008_VLSPGM_final.doc

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recovery challenge fundProject8 -3 Subject: TankINL1 3. EFFECTIVE DATE6June

  3. fabrication-polybenzimidazole-sri | netl.doe.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 Industrial Carbon Capture and Storageconvert,exercise program | National

  4. Crystal structure, magnetism and transport properties of Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}Al{sub 4.1}B{sub 10}

    SciTech Connect (OSTI)

    Janka, Oliver [Department of Chemistry, University of California, One Shields Ave, Davis, CA 95616 (United States); Baumbach, Ryan E.; Thompson, Joe D. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Bauer, Eric D., E-mail: edbauer@lanl.gov [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Kauzlarich, Susan M., E-mail: smkauzlarich@ucdavis.edu [Department of Chemistry, University of California, One Shields Ave, Davis, CA 95616 (United States)

    2013-09-15T23:59:59.000Z

    Single crystals of Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}Al{sub 4.1}B{sub 10} were obtained from a process in which a polycrystalline sample of CeRu{sub 2}Al{sub 2}B was annealed in an excess of a NiIn flux. The initial phase, CeRu{sub 2}Al{sub 2}B, does not recrystallize, instead, crystals of a new phase, Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}Al{sub 4.1}B{sub 10}, could be isolated once the flux was removed. The title compound crystallizes in the tetragonal space group P4/nmm (No. 129) with a=1139.02(8), c=801.68(6) pm (c/a=0.70) in the Nd{sub 3}Ni{sub 29}Si{sub 4}B{sub 10} structure type. Electrical resistivity measurements reveal metallic behavior with a minimum of 700 ? cm and a small residual resistivity ratio of RRR=1.4 indicating a large amount of disorder scattering. The cerium atoms are either in the 4+ or an intermediate valence state with a valence fluctuation temperature far above room temperature. - Graphical abstract: Single crystals of Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}A{sub l4.1}B{sub 10} were obtained using a process in which a polycrystalline sample of CeRu{sub 2}Al{sub 2}B was annealed in an excess of a NiIn flux. Electrical resistivity measurements reveal metallic behavior with a minimum of 700 ?? cm and a small residual resistivity ratio of RRR=1.4 indicating a large amount of disorder scattering. The cerium atoms are either in the 4+ or an intermediate valence state with a valence fluctuation temperature far above room temperature. Display Omitted - Highlights: Flux synthesis of high quality single crystals of Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}Al{sub 4.1}B{sub 10} is presented along with the crystal structure, magnetic and transport properties. The compound is isostructural to Nd{sub 3}Ni{sub 29}Si{sub 4}B{sub 10} but is first of this structure type showing mixed occupancies of d-elements. This is an intermetallic phase with Ce in either the 4+ or an intermediate valence state. The fact that this structure with mixed occupied transition metal sites exists suggests that more compounds of this type should be accessible and the physical properties tuned.

  5. Wet oxidation of phenol on Ce{sub 1{minus}x}Cu{sub x}O{sub 2{minus}{delta}} catalyst

    SciTech Connect (OSTI)

    Hocevar, S.; Batista, J. [National Inst. of Chemistry, Ljubljana (Slovenia). Lab. of Catalysis and Chemical Reaction Engineering] [National Inst. of Chemistry, Ljubljana (Slovenia). Lab. of Catalysis and Chemical Reaction Engineering; Levec, J. [National Inst. of Chemistry, Ljubljana (Slovenia). Lab. of Catalysis and Chemical Reaction Engineering] [National Inst. of Chemistry, Ljubljana (Slovenia). Lab. of Catalysis and Chemical Reaction Engineering; [Univ. of Ljubljana (Slovenia). Dept. of Chemical Engineering

    1999-05-15T23:59:59.000Z

    Ce{sub 1{minus}x}Cu{sub x}O{sub 2{minus}{delta}} catalysts with 0.05 < x < 0.20 for catalytic wet oxidation of phenol in aqueous solutions have been synthesized using the coprecipitation method. The three most important synthesis parameters, the concentration of the mixed metal salt solution, the rate of coprecipitant addition and the stirrer speed during coprecipitation, were optimized with central composite design using the catalytic activity as a response function. The catalytic activity strongly depends on stirrer speed during coprecipitation. A high mutual dispersion of copper oxide and ceria, having the average crystallite size of about 9 nm, enhances solid solution formation. The unit cell parameter of ceria decreases when the overall concentration of copper in the catalyst increases, most probably obeying Vegard`s law. The catalysts proved to be very stable in hydrothermal reaction conditions at low pH values. After 5 h of reaction in the semibatch CST reactor less than 100 ppm of Cu was leached out of catalyst samples that were calcined in a flow of air for 2 h above 1033 K, and only a very low quantity of carbonaceous deposits were formed on the surface of the catalysts (0.6 wt%). The kinetics of phenol degradation could be interpreted by an equation valid for homogeneous autocatalytic reactions, in which the rate constant depends linearly on the heterogeneous catalyst (Cu) concentrations. This demonstrates that the reaction proceeds through a heterogeneous-homogeneous radical-branched chain mechanism.

  6. Introduction of Artificial Pinning Center into PLD-YBCO Coated Conductor on IBAD and Self-Epitaxial CeO2 Buffered Metal Substrate

    SciTech Connect (OSTI)

    Kobayashi, H.; Yamada, Y.; Ishida, S.; Takahashi, K.; Konishi, M.; Ibi, A.; Miyata, S. [Superconductivity Research Laboratory, ISTEC, 2-4-1 Mutsuno, Atsuta-ku, Nagoya, 456-8587 (Japan); Kato, T.; Hirayama, T. [Materials R and D Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587 (Japan); Shiohara, Y. [Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062 (Japan)

    2006-03-31T23:59:59.000Z

    In order to fabricate YBa2Cu3O7-x (YBCO) coated conductors with high critical current density Jc in magnetic fields, we fabricated YBCO coated conductors with artificial pinning centers by the pulsed laser deposition (PLD) method on a self epitaxial PLD-CeO2 layer and ion-beam assisted deposition (IBAD)-Gd2Zr2O7 (GZO) buffered Hastelloy tape. Artificial pinning centers were introduced by the PLD deposition using the yttria-stabilized zirconia (YSZ) oxide target (nano-dot method) and YBCO target including YSZ particles (mixed target method). In the experiments using YSZ oxide target, YSZ nano-dots were observed. They were approximately 15 nm in height and 10 nm to 70 nm in diameter. We found that the density of nano-dots was controlled by the number of laser pulses. These samples exhibited higher Jc than YBCO films in magnetic fields. Furthermore, a similar improvement of Jc was observed in the experiments using YBCO target including YSZ particles. TEM observation revealed that columnar nano-structure made of BaZrO3 was formed during YBCO deposition and it was effective for pinning. We call this new epitaxial nano-structure 'bamboo structure' from its anisotropic growth and morphology.

  7. Quantum Critical Fluctuations in the Heavy fermion compound Ce(Ni0.935Pd0.065)2Ge2

    SciTech Connect (OSTI)

    C. H. Wang; L. Poudel; A. E. Taylor; J. M. Lawrence; A. D. Christianson; S. Chang; J. A. Rodriguez-Rivera; J. W. Lynn; A. A. Podlesnyak; G. Ehlers; R. E. Baumbach; E. D. Bauer; K. Gofryk; F. Ronning; K. J. McClellan; J. D. Thompson

    2014-12-01T23:59:59.000Z

    Electric resistivity, specific heat, magnetic susceptibility, and inelastic neutron scattering experi- ments were performed on a single crystal of the heavy fermion compound Ce(Ni0.935Pd0.065)2Ge2 in order to study the spin fluctuations near an antiferromagnetic (AF) quantum critical point (QCP). The resistivity and the specific heat coefficient for T = 1 K exhibit the power law behavior expected for a 3D itinerant AF QCP (?(T) ~ T^3/2 and ?(T) ~ ?0 -bT^1/2). However, for 2 = T = 10 K, the susceptibility and specific heat vary as logT and the resistivity varies linearly with temperature. Furthermore, despite the fact that the resistivity and specific heat exhibit the non-Fermi liquid behavior expected at a QCP, the correlation length, correlation time, and staggered susceptibility of the spin fluctuations remain finite at low temperature. We suggest that these deviations from the divergent behavior expected for a QCP may result from alloy disorder.

  8. An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane

    SciTech Connect (OSTI)

    Silversmith, Geert; Poelman, Hilde; Poelman, Dirk; Gryse, Roger de [Ghent University, Department of Solid State Sciences, Krijgslaan 281 S1, B-9000 Gent (Belgium); Olea, Maria; Balcaen, Veerle; Heynderickx, Philippe; Marin, Guy B. [Ghent University, Laboratorium voor Petrochemische Techniek, Krijgslaan 281 S5, B-9000 Gent (Belgium)

    2007-02-02T23:59:59.000Z

    A CuOx-CeOx/Al2O3 catalyst was studied with in-situ transmission Cu K XAS for the total oxidation of propane as model reaction for the catalytic elimination of volatile organic compounds. The local Cu structure was determined for the catalyst as such, after pre-oxidation and after reduction with propane. The catalyst as such has a local CuO structure. No structural effect was observed upon heating in He up to 600 deg. C or after pre-oxidation at 150 deg. C. A full reduction of the Cu2+ towards metallic Cu0 occurred, when propane was fed to the catalyst. The change in local Cu structure during propane reduction was followed with a time resolution of 1 min. The {chi}(k) scans appeared as linear combinations of start and end spectra, CuO and Cu structure, respectively. However, careful examination of the XANES edge spectra indicates the presence of a small amount of additional Cu1+ species.

  9. Effects of flux additives on the characteristics of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} phosphor: Particle growth mechanism and luminescence

    SciTech Connect (OSTI)

    Chiang, Chung-Hao; Liu, Te-Hsing; Lin, Han-Yu; Kuo, Hung-Yi [Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (China); Chu, Sheng-Yuan, E-mail: chusy@mail.ncku.edu.tw [Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (China); Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan (China)

    2013-12-28T23:59:59.000Z

    The dependence of the amount of the BaF{sub 2} flux additive on the luminescence of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} phosphors was investigated. The integrated emission intensity of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} prepared without the flux was enhanced by 29% with the addition of BaF{sub 2} flux at the optimum amount of 6?wt.%. Such an enhancement can be attributed to the purer phase of Y{sub 3}Al{sub 5}O{sub 12} and the morphology change from the irregular shape to spherical shape with the smoother surface due to the flux. The morphology and luminescence of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} prepared with the 6?wt.% BaF{sub 2} flux additive (Sample II) were further compared with those of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} prepared with the 7?wt.% H{sub 3}BO{sub 3} flux additive (Sample I). The particle size, particle shape, and integrated emission intensity (?{sub ex}?=?450?nm) of the former were found to be larger, more regular, and 6% higher than those of the latter. The difference in the morphology of Samples I and II, which led to the difference in the emission intensity and the external quantum efficiency, were well explained by the particle growth mechanism.

  10. Probing local structure in the yellow phosphor LaSr[subscript 2]AlO[subscript 5]:Ce[superscript 3+], by the maximum entropy method and pair distribution function analysis

    SciTech Connect (OSTI)

    Im, Won Bin; Page, Katharine; DenBaars, Steven P.; Seshadri, Ram (UCSB); (LANL)

    2011-08-04T23:59:59.000Z

    The compound LaSr{sub 2}AlO{sub 5} was recently introduced as a competitive Ce{sup 3+} host material for blue-pumped yellow phosphors for use in white light emitting diodes. A crucial feature of the crystal structure of LaSr{sub 2}AlO{sub 5} is that La, which is the host site for Ce{sup 3+}, is located in the 8h positions of the I4/mcm crystal structure, a site equally shared with Sr. While the average crystal structure of LaSr{sub 2}AlO{sub 5} as revealed by Rietveld analysis of laboratory and synchrotron X-ray diffraction data suggests nothing untoward, maximum entropy method analysis of the synchrotron X-ray data reveals the existence of conspicuous non-sphericity of the electron density. Pair distribution function analysis of the data suggests that despite their occupying the same crystallographic site, La and Sr possess distinct coordination environments, and the environment around La is more compact and regular than the environment suggested by the Rietveld refinement of the average structure. The absorption and emission from Ce{sup 3+} centers is controlled by the local coordination and symmetry, and the use of powerful new tools in unraveling details of these strengthens the rational search for new phosphors for solid state white lighting.

  11. Hydrogen for X-group exchange in CH3X, X = Cl, Br, I, OMe and NMe2 byMonomeric [1,2,4-(Me3C)3C5H2]2CeH: Experimental and Computational Support for a Carbenoid Mechanism

    SciTech Connect (OSTI)

    Werkema, Evan; Andersen, Richard; Yahia, Ahmed; Maron, Laurent; Eisenstein, Odile

    2009-05-15T23:59:59.000Z

    The reaction between [1,2,4-(Me3C)3C5H2]2CeH, referred to as Cp'2CeH, andCH3X where X is Cl, Br, I, OMe and NMe2, are described. The reactions fall intothree distinct classes. Class a, where X = Cl, Br and I rapidly form Cp'2CeX and CH4without formation of identifiable intermediates in the 1H NMR spectra. Class b, whereX = OMe proceeds rapidly to Cp'2Ce(eta2-CH2OMe) and H2 and then to Cp'2CeOMeand CH4. The methoxymethyl derivative is sufficiently stable to be isolated andcharacterized and it is rapidly converted to Cp'2CeOMe in presence of BPh3. Class c,where X = NMe2 does not result in formation of Cp'2CeNMe2, but deuterium labelingexperiments show that H for D exchange occurs in NMe3. Density functionalcalculations DFT(B3PW91) on the reaction of (C5H5)2CeH, referred to as Cp2CeH,and CH3X show that the barrier for alpha-CH activation, resulting in formation ofCp2Ce(eta2-CH2X), proceeds with a relatively low activation barrier (DeltaG++) but thesubsequent ejection of CH2 and trapping by H2 has a higher barrier; the height of thesecond barrier lies in the order F, Cl, Br, I< OMe<< NMe2, consistent with theexperimental studies. The DFT calculations also show that the two-step reaction,which proceeds through a carbenoid intermediate, has a lower barrier than a directone-step sigma bond metathesis mechanism. The reaction of Cp2CeCH2OMe and BPh3 is calculated to be a low barrier process and the ylide, CH2(+)BPh3(-), is a transition state and not an intermediate.

  12. A Brief Review of Past INL Work Assessing Radionuclide Content in TMI-2 Melted Fuel Debris: The Use of 144Ce as a Surrogate for Pu Accountancy

    SciTech Connect (OSTI)

    D. L. Chichester; S. J. Thompson

    2013-09-01T23:59:59.000Z

    This report serves as a literature review of prior work performed at Idaho National Laboratory, and its predecessor organizations Idaho National Engineering Laboratory (INEL) and Idaho National Engineering and Environmental Laboratory (INEEL), studying radionuclide partitioning within the melted fuel debris of the reactor of the Three Mile Island 2 (TMI-2) nuclear power plant. The purpose of this review is to document prior published work that provides supporting evidence of the utility of using 144Ce as a surrogate for plutonium within melted fuel debris. When the TMI-2 accident occurred no quantitative nondestructive analysis (NDA) techniques existed that could assay plutonium in the unconventional wastes from the reactor. However, unpublished work performed at INL by D. W. Akers in the late 1980s through the 1990s demonstrated that passive gamma-ray spectrometry of 144Ce could potentially be used to develop a semi-quantitative correlation for estimating plutonium content in these materials. The fate and transport of radioisotopes in fuel from different regions of the core, including uranium, fission products, and actinides, appear to be well characterized based on the maximum temperature reached by fuel in different parts of the core and the melting point, boiling point, and volatility of those radioisotopes. Also, the chemical interactions between fuel, fuel cladding, control elements, and core structural components appears to have played a large role in determining when and how fuel relocation occurred in the core; perhaps the most important of these reaction appears to be related to the formation of mixed-material alloys, eutectics, in the fuel cladding. Because of its high melting point, low volatility, and similar chemical behavior to plutonium, the element cerium appears to have behaved similarly to plutonium during the evolution of the TMI-2 accident. Anecdotal evidence extrapolated from open-source literature strengthens this logical feasibility for using cerium, which is rather easy to analyze using passive nondestructive analysis gamma-ray spectrometry, as a surrogate for plutonium in the final analysis of TMI-2 melted fuel debris. The generation of this report is motivated by the need to perform nuclear material accountancy measurements on the melted fuel debris that will be excavated from the damaged nuclear reactors at the Fukushima Daiichi nuclear power plant in Japan, which were destroyed by the Tohoku earthquake and tsunami on March 11, 2011. Lessons may be taken from prior U.S. work related to the study of the TMI-2 core debris to support the development of new assay methods for use at Fukushima Daiichi. While significant differences exist between the two reactor systems (pressurized water reactor (TMI-2) versus boiling water reactor (FD), fresh water post-accident cooing (TMI-2) versus salt water (FD), maintained containment (TMI-2) versus loss of containment (FD)) there remain sufficient similarities to motivate these comparisons.

  13. civil & environmental (CE) CE / ENE overview programs available

    E-Print Network [OSTI]

    Rohs, Remo

    : transportation systems, water supply and waste disposal systems, and industrial and commercial structures. They face the challenges of replacing our nation's aging infrastructure -- highways, bridges, wharf

  14. Amerikooler: Order (2013-CE-5307)

    Broader source: Energy.gov [DOE]

    DOE ordered Amerikooler, Inc. to pay a $8,000 civil penalty after finding Amerikooler had failed to certify that certain models of walk-in cooler and freezer components comply with the applicable energy conservation standards.

  15. Trastar: Order (2013-CE-49003)

    Broader source: Energy.gov [DOE]

    DOE ordered Trastar Inc. to pay a $8,000 civil penalty after finding Trastar had failed to certify that certain basic models of traffic signal modules and pedestrian modules comply with the applicable energy conservation standards.

  16. Keystone: Order (2013-CE-2601)

    Broader source: Energy.gov [DOE]

    DOE ordered Keystone Technologies, LLC to pay a $8,000 civil penalty after finding Keystone had failed to certify that certain models of fluorescent lamp ballasts comply with the applicable energy conservation standards.

  17. Trojan: Order (2011-CE-2704)

    Broader source: Energy.gov [DOE]

    DOE ordered Trojan, Inc. to pay a $6,000 civil penalty after finding Trojan had failed to certify that certain models of incandescent reflector lamps comply with the applicable energy conservation standards.

  18. Versonel: Order (2014-CE-21009)

    Broader source: Energy.gov [DOE]

    DOE ordered Smart Surplus, Inc. d/b/a Versonel to pay a $8,000 civil penalty after finding Versonel had failed to certify that certain models of refrigerators and residential clothes dryers comply with the applicable energy conservation standards.

  19. Dacor: Order (2014-CE-23010)

    Broader source: Energy.gov [DOE]

    DOE ordered Dacor to pay a $8,000 civil penalty after finding Dacor had failed to certify that certain models of cooking products comply with the applicable energy conservation standards.

  20. Northland: Order (2014-CE-23002)

    Broader source: Energy.gov [DOE]

    DOE ordered Northland Corporation d/b/a AGA Marvel to pay a $16,000 civil penalty after finding Northland had failed to certify that certain models of cooking products comply with the applicable energy conservation standards.

  1. NCBECS C&E 1979

    U.S. Energy Information Administration (EIA) Indexed Site

    9. Distribution of Commercial Buildings Supplied with Fuel Oil, by Number of Tanks, Tank CapaciLy, and Inventory, as of January 1, 1980 (Thousands of Buildings)...

  2. Data:F1f3858b-c287-49da-a1b4-85ce4a5fc431 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for this page. It is currently-4fb5-8904-6cd8e9e0b38fba84a6aa6df6ceaa6c7ce4a5fc431 No

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    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for thisd785796ade47 No revision has been approved for3edd1ac78af9e5cb16ce18 No

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    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approved fore6e8eee4495-afb210887c9bf3ac6ed3cc6f836fd42ce6 No revision has been

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    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump to:52c8ff988c1 No revisionEf26bb38-5a0f-4e06-b1e4-0ce2b0e0031a No revision

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    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No revisionbeb-403f-b787-2700a3b20e2e No revision has been approvede-ce6ea61b1eb3 No

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    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revision has been28a07c581c-e2db449df0ab No revision has been approved for

  8. Data:6312d6f0-b4f9-4e0a-b53b-1ce45eb56c46 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approved fore6e8eee44 No revision has been8efe6555aea3 Nodb868e8293b95ce0c2594

  9. Data:08a3be8d-d283-45fb-9d0b-bf1b1ce6c9c9 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions6ae4e73fc Nof7e0a4fbc9b253bedd No revisionc872f0ecb1ce6c9c9 No

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  11. Data:Ac9a2d40-10ea-498d-ad30-a4ce1d3e29b7 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has been approved for this page. It is currentlya4ce1d3e29b7 No revision has been approved

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  15. Long-range ordering of reduced magnetic moments in the spin-gap compound CeOs{sub 2}Al{sub 10} as seen via muon spin relaxation and neutron scattering

    SciTech Connect (OSTI)

    Adroja, D. T.; Hillier, A. D.; Kockelmann, W. A.; Anand, V. K.; Stewart, J. R.; Taylor, J. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon OX11 0QX (United Kingdom); Deen, P. P. [Institute Laue-Langevin, BP 156, 6 Rue Jules Horowitz, 38042 Grenoble Cedex (France); Strydom, A. M. [Physics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006 (South Africa); Muro, Y.; Kajino, J.; Takabatake, T. [Department of Quantum Matter, ADSM, and IAMR, Hiroshima University, Higashi-Hiroshima 739-8530 (Japan)

    2010-09-01T23:59:59.000Z

    We have carried out neutron diffraction, muon spin relaxation ({mu}SR), and inelastic neutron scattering (INS) investigations on a polycrystalline sample of CeOs{sub 2}Al{sub 10} to investigate the nature of the phase transition observed near 29 K in the resistivity and heat capacity. Our {mu}SR data clearly reveal coherent frequency oscillations below 28 K, indicating the presence of an internal field at the muon site, which confirms the long-range magnetic ordering of the Ce moment below 28 K. Upon cooling the sample below 15 K, unusual behavior of the temperature-dependent {mu}SR frequencies may indicate either a change in the muon site, consistent with the observation of superstructure reflections in electron diffraction, or a change in the ordered magnetic structure. Neutron diffraction data do not reveal any clear sign of either magnetic Bragg peaks or superlattice reflections. Furthermore, INS measurements clearly reveal the presence of a sharp inelastic excitation near 11 meV between 5 and 26 K, due to opening of a gap in the spin-excitation spectrum, which transforms into a broad response at and above 30 K. The magnitude of the spin gap (11 meV) as derived from the INS peak position agrees very well with the gap value as estimated from the bulk properties.

  16. Performance of Ni/ScSZ cermet anode modified by coating with Gd{sub 0.2}Ce{sub 0.8}O{sub 2} for a SOFC

    SciTech Connect (OSTI)

    Huang Bo [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China)]. E-mail: huangbo2k@hotmail.com; Ye, X.F. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China); Wang, S.R. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China); Nie, H.W. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China); Liu, R.Z. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China); Wen, T.L. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China)

    2007-09-04T23:59:59.000Z

    A Ni/scandia-stabilized zirconia (ScSZ) cermet anode was modified by coating with nano-sized gadolinium-doped ceria (GDC, Gd{sub 0.2}Ce{sub 0.8}O{sub 2}) within the pores of the anode for a solid oxide fuel cell (SOFC). X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed in the anode characterizations. Open circuit voltages (OCVs) increased from 1.027 to 1.078 V, and the maximum power densities increased from 238 to 825 mW/cm{sup 2}, as the operating temperature of a SOFC with 2.0 wt.%GDC-coated Ni/ScSZ anode was increased from 700 to 850 deg. C in humidified hydrogen. The coating of nano-sized Gd{sub 0.2}Ce{sub 0.8}O{sub 2} particle within the pores of the porous Ni/ScSZ anode significantly improved the performance of anode supported cell. Electrochemical impedance spectra (EIS) illustrated that the cell with Ni/ScSZ anode exhibited far greater impedances than the cell with 2.0 wt.%GDC-coated Ni/ScSZ anode. Consequently, 2.0 wt.%GDC-coated Ni/ScSZ anode could be used as a novel anode material for a SOFC due to better electrochemical performance.

  17. Combined effect of chemical pressure and valence electron concentration through the electron-deficient Li substitution on the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system

    SciTech Connect (OSTI)

    Nam, Gnu; Jeon, Jieun; Kim, Youngjo [Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of); Kwon Kang, Sung [Department of Chemistry, Chungnam National University, Daejeon, Chungnam 305-764 (Korea, Republic of); Ahn, Kyunghan [Advanced Materials Research Center, Samsung Advanced Institute of Technology, Yongin-si, Gyeonggi-do 446-712 (Korea, Republic of); You, Tae-Soo, E-mail: tsyou@chungbuk.ac.kr [Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of)

    2013-09-15T23:59:59.000Z

    Four members of the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system have been prepared by high-temperature reaction method and characterized by X-ray diffractions. All compounds crystallize in the orthorhombic Gd{sub 5}Si{sub 4}-type structure (space group Pnma, Pearson code oP16) with bonding interactions for interslab Ge{sub 2} dimers. The Li substitution for rare-earth elements in the RE{sub 4}LiGe{sub 4} system leads to a combined effect of the increased chemical pressure and the decreased valance electron concentration (VEC), which eventually results in the structure transformation from the Sm{sub 5}Ge{sub 4}-type with all broken interslab GeGe bond for the parental RE{sub 5}Ge{sub 4} to the Gd{sub 5}Si{sub 4}-type structure for the ternary RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system. Site-preference between rare-earth metals and Li is proven to generate energetically the most favorable atomic arrangements according to coloring-problem, and the rationale is provided using both the size-factor and the electronic-factor related, respectively, to site-volume and electronegativity as well as QVAL values. Tight-binding, linear-muffin-tin-orbital (TB-LMTO) calculations are performed to investigate electronic densities of states (DOS) and crystal orbital Hamilton population (COHP) curves. The influence of reduced VEC for chemical bonding including the formation of interslab Ge{sub 2} dimers is also discussed. The magnetic property measurements prove that the non-magnetic Li substitution leads to the ferromagnetic (FM)-like ground state for Ce{sub 4}LiGe{sub 4} and the co-existence of antiferromagntic (AFM) and FM ground states for Sm{sub 4}LiGe{sub 4}. - Graphical abstract: Reported is a combined effect of the chemical pressure and the reduced VEC caused by the smaller monovalent non-magnetic Li substitution for the larger trivalent magnetic rare-earth metals in the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system. This results in the structure transformation from the Sm{sub 5}Ge{sub 4}-type to the Gd{sub 5}Si{sub 4}-type structure and the changes in magnetic properties. Display Omitted - Highlights: Four Li-containing intermetallic compounds RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr and Sm) were synthesized. The combined effect of the chemical pressure and the reduced VEC caused by Li substitution for a rare-earth metal results in the structure transformation. Electronic structures and magnetic properties of title compounds were thoroughly investigated.

  18. A comparative study of SrO and BaO doping to CeO{sub 2}-ZrO{sub 2}: Characteristic and its catalytic performance for three-way catalysts

    SciTech Connect (OSTI)

    Guo, Jiaxiu, E-mail: guojiaxiu@scu.edu.cn [College of Architecture and Environment, Sichuan University, Chengdu 610065 (China) [College of Architecture and Environment, Sichuan University, Chengdu 610065 (China); National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065 (China); Shi, Zhonghua, E-mail: shizhonghua@scu.edu.cn [College of Chemistry, Sichuan University, Chengdu 610064 (China)] [College of Chemistry, Sichuan University, Chengdu 610064 (China); Wu, Dongdong [College of Chemistry, Sichuan University, Chengdu 610064 (China)] [College of Chemistry, Sichuan University, Chengdu 610064 (China); Yin, Huaqiang [College of Architecture and Environment, Sichuan University, Chengdu 610065 (China) [College of Architecture and Environment, Sichuan University, Chengdu 610065 (China); National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065 (China); Gong, Maochu [College of Chemistry, Sichuan University, Chengdu 610064 (China)] [College of Chemistry, Sichuan University, Chengdu 610064 (China); Chen, Yaoqiang [College of Chemistry, Sichuan University, Chengdu 610064 (China) [College of Chemistry, Sichuan University, Chengdu 610064 (China); National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065 (China)

    2013-02-15T23:59:59.000Z

    Graphical abstract: Display Omitted Highlights: ? The prepared materials have a face-centered cubic structure and nanosize particles. ?Comparing to CZB, aged CZS has 494 ?mol/g of OSC and 30 m{sup 2}/g of surface area. ? CZS and CZB have similar NO sorption and reductive properties and different H{sub 2} uptake. ? T{sub 50} of Pt-Rh/CZS/LA is as low as 199 C for CO, 228 C for NO, and 252 C for C{sub 3}H{sub 8}. ? Pt-Rh/CZS/LA has wider working-window at 320 C under different ? value. -- Abstract: Ceria-zirconia-strontia (Ce{sub 0.35}Zr{sub 0.55}Sr{sub 0.10}O{sub 1.9}) and ceria-zirconia-baria (Ce{sub 0.35}Zr{sub 0.55}Ba{sub 0.10}O{sub 1.9}) were synthesized using an oxidation-co-precipitation method with hydrogen peroxide (H{sub 2}O{sub 2}) as oxidant. The physical and chemical properties of the prepared materials were investigated using BrunauerEmmettTeller surface area characterization, transmission electron microscopy, X-ray diffraction, Raman spectra, X-ray photoelectron spectroscopy, and oxygen pulse reaction. The prepared materials were used in preparing three-way catalysts with low Pt and Rh content. Moreover, catalytic activities were evaluated at a fixed bed under a simulated gaseous mixture. The results are as follows: (1) the prepared materials have a face-centered cubic structure and are nano-sized; (2) aged Ce{sub 0.35}Zr{sub 0.55}Sr{sub 0.10}O{sub 1.9} has higher oxygen storage capacity (494 ?mol/g), better thermal stability (30 m{sup 2}/g), good low-temperature reducibility, and high hydrogen uptake after TPR-redox cycles; (3) the light-off temperature (T{sub 50}) of Pt-Rh/CZS/LA can be as low as 199 C for CO, 228 C for NO, and 252 C for C{sub 3}H{sub 8}; and (4) Pt-Rh/CZS/LA has a fairly wide working-window.

  19. Structural, microstructural and surface properties of a specific CeO{sub 2}-Bi{sub 2}O{sub 3} multiphase system obtained at 600 {sup o}C

    SciTech Connect (OSTI)

    Bourja, Lamia; Bakiz, Bahcine [Institut Materiaux Microelectronique et Nanosciences de Provence, IM2NP, UMR CNRS 6242, Universite du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex (France); Laboratoire Materiaux et Environnement LME, Faculte des Sciences, Universite Ibn Zohr, BP 8106, Cite Dakhla, Agadir, Maroc (Morocco); Benlhachemi, Abdeljalil; Ezahri, Mohamed [Laboratoire Materiaux et Environnement LME, Faculte des Sciences, Universite Ibn Zohr, BP 8106, Cite Dakhla, Agadir, Maroc (Morocco); Villain, Sylvie [Institut Materiaux Microelectronique et Nanosciences de Provence, IM2NP, UMR CNRS 6242, Universite du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex (France); Crosnier, Olivier [Laboratoire de Genie des Materiaux et Procedes Associes, Polytech Nantes, rue Christian Pauc BP 50609, 44306 Nantes Cedex 3 (France); Favotto, Claude [Institut Materiaux Microelectronique et Nanosciences de Provence, IM2NP, UMR CNRS 6242, Universite du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex (France); Gavarri, Jean-Raymond, E-mail: gavarri.jr@univ-tln.f [Institut Materiaux Microelectronique et Nanosciences de Provence, IM2NP, UMR CNRS 6242, Universite du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex (France)

    2011-03-15T23:59:59.000Z

    Polycrystalline samples of (1-x) CeO{sub 2}-x/2 Bi{sub 2}O{sub 3} phases, where x is the atom fraction of bismuth have been synthesized by the precipitation process and after the thermal treatment at 600 {sup o}C, under air. Samples are first characterized by the X-ray diffraction and scanning electron microscopy. To determine the samples specific surface areas, Brunauer-Emmett-Teller (BET) analyses have been performed. In the composition range 0{<=}x{<=}0.20, a cubic solid solution with fluorite structure is obtained. For compositions x comprised between 0.30 and 0.90, two types of T' (or {beta}') and T (or {beta}) tetragonal phases, similar to the well-known {beta}' or {beta} Bi{sub 2}O{sub 3} metastable structural varieties, are observed. However, the crystal cell volumes of these {beta}' or {beta} Bi{sub 2}O{sub 3} phases increase with the composition x in bismuth: this might be due to the presence of defects or substitution by cerium atoms, in the tetragonal lattices. Using X-ray diffraction profile analyses, correlations between bismuth composition x and crystal sizes or lattice distortions have been established. The solid-gas interactions between these polycrystalline materials and air-CH{sub 4} and air-CO flows have been studied as a function of temperature and composition x, using Fourier transform infrared (FTIR) analyses of the conversions of CH{sub 4} and CO gases into the CO{sub 2} gas. The transformations of CH{sub 4} and CO molecules as a function of time and temperature are determined through the intensities of FTIR CO{sub 2} absorption bands. Using the specific surface areas determined from BET analyses, these FTIR intensities have been normalized and compared. For all bismuth compositions, a low catalytic reactivity is observed with air-CH{sub 4} gas flows, while, for the highest bismuth compositions, a high catalytic reactivity is observed with air-CO gas flows. -- Graphical abstract: Catalytic efficiencies of CeO{sub 2}-Bi{sub 2}O{sub 3}system: catalytic actions on methane (on the left) or carbon monoxide (on the right) of (1-x)CeO{sub 2}-x/2 Bi{sub 2}O{sub 3} samples, as a function of the fraction x, and for fixed temperatures: on the vertical axis, the intensities of CO{sub 2} FTIR absorption bands are reported. Strong efficiency of bismuth rich samples for CO conversion. Display Omitted Research highlights: {yields} Stabilization of metastable polymorph Bi{sub 2}O{sub 3} phases in the mix system [(1-x)CeO{sub 2}+(x/2)Bi{sub 2}O{sub 3}] at 600 {sup o}C. {yields} Solid gas interactions between this system and air-CO or air-CH{sub 4} gas flows at various temperatures and bismuth compositions. {yields} High efficiency of bismuth rich samples to convert CO into CO{sub 2}.

  20. Data:Ccd78ce0-41e2-428c-a5a4-27f7cc54aea7 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 No revision has been930896adaac340c0b NoCcd78ce0-41e2-428c-a5a4-27f7cc54aea7

  1. S T U D EN T A ND EN R OLM EN T S ER V I CE S DI V IS IO N In order to assist departments and colleges with their planning cycle for 2014-15 and beyond,

    E-Print Network [OSTI]

    Saskatchewan, University of

    Page | 1 S T U D EN T A ND EN R OLM EN T S ER V I CE S DI V IS IO N In order to assist departments: Key Dates and Deadlines for 2014-15 DATE: March 28, 2014 #12;Page | 2 S T U D EN T A ND EN R OLM EN

  2. New orthorhombic derivative of CaCu{sub 5}-type structure: RNi{sub 4}Si compounds (R=Y, La, Ce, Sm, GdHo), crystal structure and some magnetic properties

    SciTech Connect (OSTI)

    Morozkin, A.V., E-mail: morozkin@general.chem.msu.ru [Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, GSP-2, Moscow 119992 (Russian Federation); Knotko, A.V. [Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, GSP-2, Moscow 119992 (Russian Federation); Yapaskurt, V.O. [Department of Petrology, Geological Faculty, Moscow State University, Leninskie Gory, Moscow 119992 (Russian Federation); Yuan, Fang; Mozharivskyj, Y. [Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1 (Canada); Nirmala, R. [Indian Institute of Technology Madras, Chennai 600036 (India)

    2013-12-15T23:59:59.000Z

    The crystal structure of new YNi{sub 4}Si-type RNi{sub 4}Si (R=Y, La, Ce, Sm, GdHo) compounds has been established using powder X-ray diffraction. The YNi{sub 4}Si structure is a new structure type, which is orthorhombic derivative of CaCu{sub 5}-type structure (space group Cmmm N 65, oC12). GdNi{sub 4}Si and DyNi{sub 4}Si compounds order ferromagnetically at 25 and 19 K, respectively whereas YNi{sub 4}Si shows antiferromagnetic nature. At 15 K, DyNi{sub 4}Si shows second antiferromagnetic-like transition. The magnetic moment of GdNi{sub 4}Si at 5 K in 50 kOe field is ?7.2 ?{sub B}/f.u. suggesting a completely ordered ferromagnetic state. The magnetocaloric effect of GdNi{sub 4}Si is calculated in terms of isothermal magnetic entropy change and it reaches the maximum value of ?12.8 J/kg K for a field change of 50 kOe near T{sub C} ?25 K. - Graphical abstract: The RNi{sub 4}Si (R=Y, La, Ce, Sm, GdHo) compounds crystallize in new YNi{sub 4}Si-type structure which is orthorhombic derivative of the basic CaCu{sub 5}-type structure. GdNi{sub 4}Si and DyNi{sub 4}Si compounds show the ferromagnetic-like ordering, whereas.YNi{sub 4}Si has the antiferromagnetic nature. The GdNi{sub 4}Si demonstrates the big magnetocaloric effect near temperature of ferromagnetic ordering. The relationship between initial CaCu{sub 5}-type DyNi{sub 5} and YNi{sub 4}Si-type DyNi{sub 4}Si lattices.

  3. The influence of auxiliary codopants on persistent phosphor Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+},R{sup 3+} (R = Y, La, Ce, Gd, Tb and Lu)

    SciTech Connect (OSTI)

    Ju, Guifang; Hu, Yihua, E-mail: huyh@gdut.edu.cn; Chen, Li; Wang, Xiaojuan; Mu, Zhongfei

    2013-11-15T23:59:59.000Z

    Graphical abstract: Rare earth ions which close to the line are good codopants. - Highlights: The persistent luminescence in Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+},R{sup 3+} was reported. Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+},Lu{sup 3+} shows the best performance. The influence of auxiliary codopants was discussed in terms of ionic potential and ionic radius. - Abstract: We investigate the persistent luminescence in europium-doped strontium pyrophosphate upon codoping with auxiliary rare earth ions. The persistent phosphors are synthesized via solid-state reaction method under flowing N{sub 2} + H{sub 2}. Under UV irradiation, broadband emission persistent luminescence located at 420 nm is observed in all of these phosphors at room temperature. The effects of auxiliary rare earth ions on Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+} are discussed according to the decay curves and thermoluminescence spectra. Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+},Lu{sup 3+} shows the best performance, while and La{sup 3+} and Ce{sup 3+} codoped samples are the weakest. The influence of auxiliary codopants is discussed in terms of ionic potential and ionic radius. We derive an empirical formula based on the experimental results.

  4. Anode-supported tubular SOFCs based on BaZr0.1Ce0.7Y0.1Yb0.1O3?? electrolyte fabricated by dip coating

    SciTech Connect (OSTI)

    Chen, Changcheng; Liu, Mingfei; Bai, Yaohui; Yang, Lei; Xie, Erqing; Liu, Meilin

    2011-01-01T23:59:59.000Z

    Anode-supported tubular solid oxide fuel cells (SOFCs) based on a proton and oxide ion mixed conductor, BaZr{sub 0.1}Ce{sub 0.7}Y{sub 0.1}Yb{sub 0.1}O{sub 3 ? ?} (BZCYYb), have been fabricated using a dip coating and co-firing process. This new fabrication technique effectively reduced the Ohmic resistances of tubular cells to ~ 0.1 and ~ 0.3 ? cm{sup 2} at 750 and 600 C, respectively. Typical tubular cells with Ni-BZCYYb anode, BZCYYb electrolyte, and La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3 ? ?} (LSCF)-BZCYYb composite cathode demonstrated much-improved performance, achieving peak power densities of 1.13, 0.81, 0.63, and 0.53 W cm{sup ? 2} at 750, 700, 650, and 600 C, respectively, when humidified (3 v% water vapor) hydrogen was used as fuel and ambient air as oxidant.

  5. Synthesis and characterization of (CeO{sub 2}){sub 0.8}(SmO{sub 1.5}){sub 0.2} thin films from polymeric precursors

    SciTech Connect (OSTI)

    Chen, C.C.; Nasrallah, M.M.; Anderson, H.U. [Univ. of Missouri, Rolla, MO (United States). Dept. of Ceramic Engineering

    1993-12-01T23:59:59.000Z

    (CeO{sub 2}){sub 0.8}(SmO{sub 1.5}){sub 0.2}(CSO) has been suggested for solid oxide fuel cell (SOFC) applications, because of its higher electrical conductivity and chemical stability, compared to other ceria-based materials. However, CSO is difficult to densify under conditions compatible with other SOFC components. A thin film synthesis technique has been developed for the fabrication of dense CSO films from precursor solutions at relatively low temperatures. Dense, smooth, and homogeneous films were obtained on Pt, single-crystal Si, and La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3} (LSCF) substrates by spin-coating a polymeric precursor and subsequent heat-treatment. Crystallization of the film occurred at temperatures as low as 320 C. The developed oxide film did not react with La{sub 0.8}Sr{sub 0.2}MnO{sub 3}, LSCF, or (ZrO{sub 2}){sub 0.84}(YO{sub .15}){sub 0.16}(YSZ) at temperatures up to 1,200 C. When a CSO layer was applied between LSCF and YSZ, a significant improvement in the interfacial resistance was observed. The results suggest that CSO can be used as a buffer layer on YSZ electrolytes for improved performance of high temperature SOFCs.

  6. Thermal conductivity control by oxygen defect concentration modification in reducible oxides: The case of Pr{sub 0.1}Ce{sub 0.9}O{sub 2??} thin films

    SciTech Connect (OSTI)

    Luckyanova, Maria N.; Chen, Gang, E-mail: gchen2@mit.edu, E-mail: byildiz@mit.edu [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Chen, Di; Tuller, Harry L. [Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Ma, Wen; Yildiz, Bilge, E-mail: gchen2@mit.edu, E-mail: byildiz@mit.edu [Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

    2014-02-10T23:59:59.000Z

    We demonstrate the impact on thermal conductivity of varying the concentration of oxygen vacancies and reduced cations in Pr{sub 0.1}Ce{sub 0.9}O{sub 2??} thin films prepared by pulsed laser deposition. The oxygen vacancy concentration is controlled by varying the oxygen partial pressure between 1??10{sup ?4} and 1?atm at 650??C. Corresponding changes in the oxygen non-stoichiometry (?) are monitored by detecting the lattice parameters of the films with high-resolution X-ray diffraction, while the thermal properties are characterized by time-domain thermoreflectance measurements. The films are shown to exhibit a variation in oxygen vacancy content, and in the Pr{sup 3+}/Pr{sup 4+} ratio, corresponding to changes in ? from 0.0027 to 0.0364, leading to a reduction in the thermal conductivity from k?=?6.62??0.61 to 3.82??0.51?W/m-K, respectively. These values agree well with those predicted by the Callaway and von Baeyer model for thermal conductivity in the presence of point imperfections. These results demonstrate the capability of controlling thermal conductivity via control of anion and cation defect concentrations in a given reducible oxide.

  7. Solar hydrogen production using Ce{sub 1-x}Li{sub x}O{sub 2-{delta}} solid solutions via a thermochemical, two-step water-splitting cycle

    SciTech Connect (OSTI)

    Meng, Qing-Long; Lee, Chong-il; Shigeta, Satoshi [Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 1528850 (Japan)] [Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 1528850 (Japan); Kaneko, Hiroshi [Solutions Research Laboratory, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 1528850 (Japan)] [Solutions Research Laboratory, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 1528850 (Japan); Tamaura, Yutaka, E-mail: ytamaura@chem.titech.ac.jp [Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 1528850 (Japan)] [Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 1528850 (Japan)

    2012-10-15T23:59:59.000Z

    The reactivity of Ce{sub 1-x}Li{sub x}O{sub 2-{delta}} (x=0.025, 0.05, 0.075 and 0.1) solid solutions during the redox and two-step water-splitting cycles has been investigated in this work. Thermogravimetric analysis (TGA), X-ray diffraction (XRD) patterns and field-emission scanning electron microscopy (FE-SEM) indicate that there are two reaction mechanisms in the O{sub 2}-releasing step and the shift in the reaction mechanisms occurs in the O{sub 2}-releasing step because of sintering at high temperatures, and a decrease in the concentration of lattice oxygen occurs as the O{sub 2}-releasing step proceeds. The reaction in the O{sub 2}-releasing step follows a second-order mechanism over a temperature range of 1000-1170 Degree-Sign C and a contracting-area model over a temperature range of 1170-1500 Degree-Sign C. According to direct gas mass spectroscopy (DGMS), ceria doped at 5 mol% Li exhibits the highest reactivity in the O{sub 2}-releasing step during both redox cycles in air and two-step water-splitting cycles, whereas ceria doped at 2.5 mol% Li yields the highest amount of hydrogen (4.79 ml/g) in the H{sub 2}-generation step during the two-step water-splitting cycles, which is higher than ceria doped with other metals. DGMS and electrochemical impedance spectroscopy (EIS) suggest that the average reaction rate in the H{sub 2}-generation step is influenced by the concentration of extrinsic oxygen vacancies, and thus, the reactivity in the H{sub 2}-generation step, to some degree, could be tuned by varying the concentration of extrinsic oxygen vacancies (Li content). - Graphical abstract: Average reduction fraction of Ce{sub 1-x}Li{sub x}O{sub 2-{delta}} (x=0.025, 0.05, 0.075 and 0.10) solid solutions versus Li content in the O{sub 2}-releasing step during the redox cycles in air and the two-step water-splitting cycles. Highlights: Black-Right-Pointing-Pointer We have investigated Li-doped ceria for hydrogen production using two-step water-splitting cycles. Black-Right-Pointing-Pointer The sintering effect on the reaction mechanisms was first clarified. Black-Right-Pointing-Pointer The shift of reaction mechanisms occurs during the O{sub 2}-releasing step. Black-Right-Pointing-Pointer The reaction-mechanism shift occurs because of sintering at high temperatures. Black-Right-Pointing-Pointer Doping at 2.5 mol% Li results in the highest H{sub 2} yield and cyclability for hydrogen production.

  8. Synthesis, structural characterization and Mssbauer study of LnV{sub 0.5}Fe{sub 0.5}O{sub 3} perovskites (Ln = Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er)

    SciTech Connect (OSTI)

    Ivashita, Flvio F.; Biondo, Valdecir; Bellini, Jusmar V.; Paesano, Andrea [Departamento de Fsica, Universidade Estadual de Maring, Av. Colombo 5790, 87.020-900 Maring, PR (Brazil)] [Departamento de Fsica, Universidade Estadual de Maring, Av. Colombo 5790, 87.020-900 Maring, PR (Brazil); Blanco, M. Cecilia; Fuertes, Valeria C.; Pannunzio-Miner, Elisa V. [INFIQC-CONICET, Departamento de Fisicoqumica, Facultad de Ciencias Qumicas, Universidad Nacional de Crdoba, X5000HUA Crdoba (Argentina)] [INFIQC-CONICET, Departamento de Fisicoqumica, Facultad de Ciencias Qumicas, Universidad Nacional de Crdoba, X5000HUA Crdoba (Argentina); Carbonio, Ral E., E-mail: carbonio@fcq.unc.edu.ar [INFIQC-CONICET, Departamento de Fisicoqumica, Facultad de Ciencias Qumicas, Universidad Nacional de Crdoba, X5000HUA Crdoba (Argentina)

    2012-09-15T23:59:59.000Z

    Graphical abstract: Mssbauer spectra taken at 200 K for the Y(V{sub 0.5}Fe{sub 0.5})O{sub 3} orthoferrivanadate synthesized by arc-melting. Highlights: ? LnFe{sub 0.5}V{sub 0.5}O{sub 3} were synthesized by the first time for most of the rare-earth elements. ? These orthoferrivanadates crystallize metastably with the perovskite structure. ? Iron and vanadium are trivalent stabilized in these solid solutions. ? The Mssbauer quadrupolar splitting is correlated with the tolerance factor. ? Below 100 K, these perovskites undergo a crystallographic phase transformation. -- Abstract: Perovskites LnV{sub 0.5}Fe{sub 0.5}O{sub 3} (Ln = Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er) were synthesized by rapid solidification from arc-melted samples and characterized by the study of their crystal structure and hyperfine properties. These metastable solid solutions crystallized in the Pbnm symmetry, with the iron and vanadium cations randomly distributed in the transition metal octahedral sites. Depending on the lanthanide present at the A site of the perovskite, iron is present with two valences (i.e., Fe{sup 3+} and Fe{sup 2+}). The volume of the unit cell for these perovskites increases linearly with the lanthanide ionic radius, as the perovskite approaches its ideal structure. At room temperature, the quadrupolar splitting of the trivalent paramagnetic Mssbauer component works as an indirect measurement for the Goldshmidt tolerance factor. Close to or below 100 K, these perovskites undergo a crystallographic phase transformation, probably due to orbital ordering of the V{sup 3+} cations, originating two different magnetic iron sites.

  9. Past, Current and Future Trends in Tobacco Use

    E-Print Network [OSTI]

    Guindon, G. Emmanuel; Boisclair, David

    2003-01-01T23:59:59.000Z

    Spain Sri Lanka Sudan Suriname Swaziland Sweden SwitzerlandSpain Sri Lanka Sudan Suriname Swaziland Sweden SwitzerlandSpain Sri Lanka Sudan Suriname Swaziland Sweden Switzerland

  10. Growing out of a postsocialist world : teenagers reconstructing identities in Western Ukraine

    E-Print Network [OSTI]

    Peacock, Elizabeth A.

    2011-01-01T23:59:59.000Z

    Biological Citizens after Chernobyl. Princeton: Princetonand nationals second. the Chernobyl accident of 1986 (Popsonthe significance of Chernobyl remains unexplored. According

  11. Reforming the Nation: Law and Land in Post-Soviet Ukraine

    E-Print Network [OSTI]

    Eppinger, Monica Elizabeth

    2010-01-01T23:59:59.000Z

    2005. Voices from Chernobyl. In Paris Review 172.Biological Citizens after Chernobyl. Princeton: Princetonmissed seer. Serhiy Mirniy, Chernobyl? liquidator and comic

  12. Recollecting Perestroika: Notes from the Playgrounds of Ukraine (19861993)

    E-Print Network [OSTI]

    Yakovlyeva, Vita

    2015-01-01T23:59:59.000Z

    the catastrophe at Chernobyl, are reflected in recollectionsby the catastrophe at Chernobyl. From 1986 to 1993 childrenof children. In the days of Chernobyl, there was not much to

  13. Reforming the Nation: Law and Land in Post-Soviet Ukraine

    E-Print Network [OSTI]

    Eppinger, Monica Elizabeth

    2010-01-01T23:59:59.000Z

    2007. Sofijski Chyannya [Sophia Readings: Materials of thein Russian orthodoxy, St. Sophia?s (now a state museum). 118wanted to bury him at St. Sophia?s, as a way of staking a

  14. Zaporozhye aluminum smelter: Ukraine modernization and environmental protection project. Feasibility study report. Export trade information

    SciTech Connect (OSTI)

    NONE

    1995-07-01T23:59:59.000Z

    The report shows the results of a feasibility study conducted for the modernization and environmental protection systems proposed for the Zaporozhye Aluminum Smelter. The study reviews the overall technological and environmental improvement programs for the final design details for potcell modifications. Also covered is a review of project implementation for the best possible construction technique to minimize production loss as well as strategic investment plans to secure project financing from financial institutions. The report is divided into the following sections: (1) Executive Summary; (2) Introduction; (3) Existing Facilities at ZALK and its Fixed Assets; (4) Plant Modernization Project; (5) Environmental Control and Fume Treatment System; (6) Market Study; (7) Plant Organization and Manning; (8) Project Implementation Strategy; (9) Economical and Financial Analysis.

  15. Comparison between cadmium zinc telluride crystals grown in Russia and in the Ukraine

    SciTech Connect (OSTI)

    Hermon, H.; James, R.B. [Sandia National Labs., Livermore, CA (United States); Schieber, M. [Sandia National Labs., Livermore, CA (United States); [Hebrew Univ. of Jerusalem (Israel)] [and others

    1998-12-31T23:59:59.000Z

    A comparative analysis of different Cd{sub 1{minus}x}Zn{sub x}Te (CZT) crystals grown by a vertical high pressure Bridgman (VHPB) method is reported. The results of several analytical techniques, such as triple axis X-ray diffraction (TAD), rocking curves, low temperature photoluminescence (PL), scanning electron microscopy (SEM), and proton induced X-ray emission (PIXE) are discussed. Segregated carbon inclusions were identified by SEM and energy dispersive X-ray fluorescence (EDXRF), and the results are interpreted in terms of constitutional supercooling of the solidifying CZT melt. The carbon inclusions significantly decrease the resistivity, and in some cases, the noise is too large for the fabrication of radiation detectors. Combining these results with other measurements reported by their research team, the authors identify correlations between the growth and the defects in these CZT crystals.

  16. Democracy and Economic Demands in Russia and Ukraine: Lessons for Democratic Theory

    E-Print Network [OSTI]

    Shulga, Mayia

    2012-01-01T23:59:59.000Z

    s Workers in Transition: Labor, Management, and the States Workers in Transition: Labor, Management, and the States Workers in Transition: Labor, Management, and the State

  17. Comparison of International Energy Intensities across the G7 and other parts of Europe, including Ukraine

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"Click worksheet9,1,50022,3,,,,6,1,,781Title: Telephone:shortOilCompany Level Imports Explanatory

  18. Ukraine-Capacity Building for Low Carbon Growth | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov PtyInformation UC 19-6-401 et seq. -Udhaya Energyfor Low Carbon Growth Jump to:

  19. Ukraine-Joint Programme on Resource Efficient and Cleaner Production (RECP)

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov PtyInformation UC 19-6-401 et seq. -Udhaya Energyfor Low Carbon Growth Jump

  20. The Juniper Coast: A Survey of the Medieval Shipwrecks of Novy Svet, Ukraine

    E-Print Network [OSTI]

    Albertson, John Arthur

    2014-06-19T23:59:59.000Z

    . Sergei Zelenko, of the Centre for Underwater Archaeology (hereafter CUA) at the Taras Shevchenko National University of Kiev began research there in 1997, the submerged cargos of two to three medieval ships have been discovered. Dating to the 10th..., where I donned ancient Soviet era tanks to make my first dives on the medieval shipwreck sites lying along the bay seafloor. I will never forget that first impression: arriving in Simferopol on a bright morning after an overnight journey from Kiev...

  1. Phytoremediation of radiocesium-contaminated soil in the vicinity of Chernobyl, Ukraine

    SciTech Connect (OSTI)

    Dushenkov, S. [Phytotech, Inc., Monmouth Junction, NJ (United States)] [Phytotech, Inc., Monmouth Junction, NJ (United States); Mikheev, A.; Prokhnevsky, A.; Ruchko, M.; Sorochinsky, B. [National Academy of Science, Kiev (Ukraine). Inst. of Cell Biology and Genetic Engineering] [National Academy of Science, Kiev (Ukraine). Inst. of Cell Biology and Genetic Engineering

    1999-02-01T23:59:59.000Z

    Remediation of soil contaminated with {sup 137}Cs remains one of the most challenging tasks after the Chernobyl 1986 accident. The objectives of this research were to (1) identify extractants that may be used to solubilize {sup 137}Cs in soil solution, (2) study the effect of soil amendments on {sup 137}Cs accumulation by plants, and (3) evaluate the applicability of phytoextraction for environmental restoration of soil contaminated with {sup 137}Cs. The availability of {sup 137}Cs to the plants in Chernobyl soil was limited, because this radionuclide was tightly bound to exchange sites of soil particles or incorporated into the crystalline structure of primary and secondary minerals. Out of 20 soil amendments tested to increase {sup 137}Cs desorption/solubility in the soil, ammonium salts were found to be the most practical soil amendment that can potentially increase {sup 137}Cs bioavailability. Among the screened plants, Amaranth cultivars had the highest {sup 137}Cs accumulation. Three sequential crops of Indian mustard grown in one vegetation season at the experimental plot resulted in a small decrease of {sup 137}Cs specific activity within the top 15 cm of soil. Further improvements are necessary to make phytoremediation technology a feasible option for restoration of {sup 137}Cs-contaminated territories.

  2. Ukraine-The World Bank Partnership for Market Readiness (PMR) | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTagusparkCalculator Jump to: navigation,UTEK JumpBid(CTI

  3. U.S. Commits $14 million to U.S. - Ukraine Nuclear Fuel Qualification

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomenthe House Committee on EnergyEnergyThe sun risesTheTrentScience

  4. Massachusetts Institute of Technology New Trend in High Energy Physics, Alushta, Ukraine, Sep. 6, 2011

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces andMapping the Nanoscale Landscape

  5. Ukraine-Capacity Building for Low Carbon Growth | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop,Save Energy Now Jump to:DevelopmentEnergyEurasiaLCI)SupportGrowth

  6. Palmetto Clean Energy (PaCE) Program

    Broader source: Energy.gov [DOE]

    '''''Note: For a limited time, generators of 6 kilowatts or less of renewable energy can now take advantage of a premium $0.10 per kilowatt hour. This premium is available on a first-come-first...

  7. Minka-Aire: Order (2014-CE-32018)

    Broader source: Energy.gov [DOE]

    DOE ordered Minka Lighting Inc. to pay a $8,000 civil penalty after finding Minka had failed to certify that certain models of ceiling fans comply with the applicable energy conservation standards.

  8. Kold Pack: Proposed Penalty (2013-CE-5323)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Kold Pack, Inc. failed to certify walk-in cooler or freezer components as compliant with the energy conservation standards.

  9. Kold Pack: Order (2013-CE-5323)

    Broader source: Energy.gov [DOE]

    DOE ordered Kold Pack, Inc. to pay a $8,000 civil penalty after finding Kold Pack had failed to certify that certain models of walk-in cooler and freezer components comply with the applicable energy conservation standards.

  10. Dans ce numro Le Service Informatique du

    E-Print Network [OSTI]

    sont : · deux salles de Macintosh avec un serveur; · une salle de terminaux reliés au VAX 8600; · une

  11. Amerikooler: Proposed Penalty (2013-CE-5307)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Amerikooler, Inc. failed to certify walk-in cooler or freezer (WICF) components as compliant with the energy conservation standards.

  12. Dade Engineering: Proposed Penalty (2013-CE-5316)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Dade Engineering Corp. failed to certify walk-in cooler or freezer components as compliant with the energy conservation standards.

  13. Engineered Solutions: Order (2010-CE-2112)

    Broader source: Energy.gov [DOE]

    DOE issued an Order after entering into a Compromise Agreement with Engineered Solutions, Inc. to resolve a case involving the failure to certify dehumidifier basic model SD109.

  14. Dade Engineering: Order (2013-CE-5316)

    Broader source: Energy.gov [DOE]

    DOE ordered Dade Engineering Corp. to pay a $8,000 civil penalty after finding Dade Engineering had failed to certify that certain models of walk-in cooler and freezer (WICF) components comply with the applicable energy conservation standards.

  15. Engineered Solutions: Proposed Penalty (2010-CE-2112)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Engineered Solutions, Inc. failed to certify a dehumidifier as compliant with the applicable energy conservation standards.

  16. Polar King: Order (2013-CE-5328)

    Broader source: Energy.gov [DOE]

    DOE ordered Polar King International Inc. to pay a $8,000 civil penalty after finding Polar King had failed to certify that certain models of walk-in cooler and freezer components comply with the applicable energy conservation standards.

  17. Polar King: Proposed Penalty (2013-CE-5328)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Polar King International Inc. failed to certify a variety of walk-in cooler or freezer components as compliant with the applicable energy conservation standards.

  18. Golden Opportunity: Proposed Penalty (2014-CE-20003)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Golden Opportunity, Inc. failed to certify room air conditioners, central air conditioners/heat pumps, and residential clothes washers as compliant with the applicable energy conservation standards.

  19. MC Appliance: Proposed Penalty (2014-CE-20002)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that MC Appliance Corporation failed to certify residential clothes washers and residential clothes dryers as compliant with the applicable energy conservation standards.

  20. Nostalgia Products: Proposed Penalty (2014-CE-14017)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Nostalgia Products Group, LLC failed to certify a variety of consumer refrigerators and refrigerator-freezers as compliant with the applicable energy conservation standards.