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1

Using Web Service Gateways and Code Generation for Sustainable IoT System Development  

E-Print Network [OSTI]

use case this paper shows how we hope to make equally sustainable IoT solutions by employing a modelUsing Web Service Gateways and Code Generation for Sustainable IoT System Development Till Riedel+ years may especially profit from an Internet of Things. Motivated by a practical industrial servicing

Beigl, Michael

2

IoT Design Space Challenges: Circuits and Systems D. Blaauw, D. Sylvester, P. Dutta, Y. Lee, I. Lee, S. Bang, Y. Kim, G. Kim, P. Pannuto,  

E-Print Network [OSTI]

T) is a rapidly emerging application space, poised to become the largest electronics market for the semiconductor was previously absent. As a result, IoT presents the semiconductor industry with a market opportunity that may, extremely long lifetime HVAC sensors, to sensors for oil reservoir diagnosis [1]. To categorize this wide

Dutta, Prabal

3

Enhanced oxygen evolution activity of IrO2 and RuO2 (100) surfaces  

SciTech Connect (OSTI)

The activities of the oxygen evolution reaction (OER) on IrO2 and RuO2 catalysts are among the highest known to date. However, the intrinsic OER activities of surfaces with defined crystallographic orientations are not well established experimentally. Here we report that the (100) surface of IrO2 and RuO2 is more active than the (110) surface that has been traditionally explored by density functional theory studies. The relation between the OER activity and density of coordinatively undersaturated metal sites exposed on each rutile crystallographic facet is discussed. The surface-orientation dependent activities can guide the design of high-surface-area catalysts with increased activity for electrolyzers, metal-air batteries, and photoelectrochemical water splitting applications.

Stoerzinger, Kelsey [Massachusetts Institute of Technology (MIT)] [Massachusetts Institute of Technology (MIT); Qiao, Liang [ORNL] [ORNL; Biegalski, Michael D [ORNL] [ORNL; Christen, Hans M [ORNL] [ORNL; Shao-Horn, Yang [Massachusetts Institute of Technology (MIT)] [Massachusetts Institute of Technology (MIT)

2014-01-01T23:59:59.000Z

4

Sandia National Laboratories: TiO2  

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 ConchasPassiveSubmitted for USMaterials ProgramProtected: Tech ReferenceEnhancementTiO2

5

Rate-dependent morphology of Li2O2 growth in Li-O2 batteries  

E-Print Network [OSTI]

Compact solid discharge products enable energy storage devices with high gravimetric and volumetric energy densities, but solid deposits on active surfaces can disturb charge transport and induce mechanical stress. In this Letter we develop a nanoscale continuum model for the growth of Li2O2 crystals in lithium-oxygen batteries with organic electrolytes, based on a theory of electrochemical non-equilibrium thermodynamics originally applied to Li-ion batteries. As in the case of lithium insertion in phase-separating LiFePO4 nanoparticles, the theory predicts a transition from complex to uniform morphologies of Li2O2 with increasing current. Discrete particle growth at low discharge rates becomes suppressed at high rates, resulting in a film of electronically insulating Li2O2 that limits cell performance. We predict that the transition between these surface growth modes occurs at current densities close to the exchange current density of the cathode reaction, consistent with experimental observations.

Horstmann, B; Mitchell, R; Bessler, W G; Shao-Horn, Y; Bazant, M Z

2013-01-01T23:59:59.000Z

6

OpenEI Community - iot  

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 ResourcesLoading map...(UtilityCounty, Michigan: EnergyOpenBarter Jump to: navigation, search Tool

7

iot | OpenEI Community  

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: 160 East 300 South Place:ReferenceEditWisconsin:YBR SolarZe-geniot Home No Battery

8

High-rate and low-temperature synthesis of TiO2, TiN, and TiO2/TiN/TiO2 thin films and study of their optical and interfacial characteristics  

E-Print Network [OSTI]

High-rate and low-temperature synthesis of TiO2, TiN, and TiO2/TiN/TiO2 thin films and study with unbalanced magnetrons, we deposited advanced inorganic functional thin films such as TiO2, TiN, and TiO2/Ti sputtering. The TiO2 101 and TiN 100 thin films were stoichiometric and polycrystalline but highly oriented

Boo, Jin-Hyo

9

Temperature Dependent Absorption Cross-Sections of O2-O2 collision pairs1 between 340 and 630 nm and at atmospherically relevant pressure2  

E-Print Network [OSTI]

(CIA). At 203 K, van der Waals complexes (O2-dimer) contribute less than26 0.14% to the O4 absorption induced absorption (CIA) results in38 additional O4-CIA absorption from O2-O2 collision pairs that overlap that of O2-dimer. With CIA,39 the selection rules of molecular O2 transitions are relaxed as a result

10

Nonthermal Water Splitting on Rutile TiO2: Electron-Stimulated...  

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

Nonthermal Water Splitting on Rutile TiO2: Electron-Stimulated Production of H-2 and O-2 in Amorphous Solid Water Films on TiO2 Nonthermal Water Splitting on Rutile TiO2:...

11

Stability of polymer binders in Li-O2 batteries  

SciTech Connect (OSTI)

A number of polymers with various chemical structures were studied as binders for air electrodes in Li-O2 batteries. The nature of the polymer significantly affects the binding properties in the carbon electrodes thus altering the discharge performance of Li-O2 batteries. Stability of polymers to the aggressive reduced oxygen species generated during discharge was tested by ball milling them with KO2 and Li2O2, respectively. Most of the polymers decomposed under these conditions and mechanisms of the decompositions are proposed for some of the polymers. Polyethylene was found to have excellent stability and is suggested as robust binder for air electrodes in Li-O2 batteries.

Nasybulin, Eduard N.; Xu, Wu; Engelhard, Mark H.; Nie, Zimin; Li, Xiaohong S.; Zhang, Jiguang

2013-06-24T23:59:59.000Z

12

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...

13

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....

14

Molecular Beam Scattering of Aligned Oxygen Molecules. The Nature of the Bond in the O2-O2 Dimer  

E-Print Network [OSTI]

. These results indicate that most of the bonding in the dimer comes from van der Waals forces, but chemical (spin that it is not paramagnetic." He also gave a value of 5.60 meV for the heat of dissociation of the O2-O2 dimer. Actually from different spin coupling of the monomers in the ground electronic state. Spin coupling leads

Pirani, Fernando

15

Low-Temperature, Strong SiO2-SiO2 Covalent Wafer Bonding for IIIV Compound Semiconductors-to-Silicon Photonic  

E-Print Network [OSTI]

required temperature for strong covalent bond for- mation and greater diffusion efficiency of gasLow-Temperature, Strong SiO2-SiO2 Covalent Wafer Bonding for III­V Compound Semiconductors-temperature process for covalent bonding of thermal SiO2 to plasma-enhanced chemical vapor deposited (PECVD) SiO2

Bowers, John

16

On the Origin and Implications of Li$_2$O$_2$ Toroid Formation in Nonaqueous Li-O$_2$ Batteries  

E-Print Network [OSTI]

The lithium-air (Li-O$_2$) battery has received enormous attention as a possible alternative to current state-of-the-art rechargeable Li-ion batteries given their high theoretical specific energy. However, the maximum discharge capacity in nonaqueous Li-O$_2$ batteries is limited to a small fraction of its theoretical value due to the insulating nature of lithium peroxide, Li$_2$O$_2$, the battery$'$s primary discharge product. In this work, we show that the inclusion of trace amounts of electrolyte additives, such as H$_2$O, significantly improve the capacity of the Li-O$_2$ battery. These additives trigger a solution-based growth mechanism due to their solvating properties, thereby circumventing the Li$_2$O$_2$ conductivity limitation. Experimental observations and a growth model imply that this solution mechanism is responsible for Li$_2$ toroid formation. We present a general formalism describing an additive$'$s tendency to trigger the solution process, providing a rational design route for electrolytes t...

Aetukuri, Nagaphani B; García, Jeannette M; Krupp, Leslie E; Viswanathan, Venkatasubramanian; Luntz, Alan C

2014-01-01T23:59:59.000Z

17

Effect of Chemical Lithium Intercalation into Rutile TiO2 Nanorods...  

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

Chemical Lithium Intercalation into Rutile TiO2 Nanorods. Effect of Chemical Lithium Intercalation into Rutile TiO2 Nanorods. Abstract: Rutile TiO2 nanorods were synthesized by...

18

Electron- and hole-mediated reactions in UV -irradiated O2 adsorbed...  

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

O2 adsorbed on reduced rutile TiO2(110). Abstract: The photon-stimulated reactions in oxygen adsorbed on reduced TiO2(110) at low temperatures (< 100 K) are studied. The amount...

19

Water as a Catalyst: Imaging Reactions of O-2 with Partially...  

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

Imaging Reactions of O-2 with Partially and Fully Hydroxylated TiO2(110) Surfaces. Water as a Catalyst: Imaging Reactions of O-2 with Partially and Fully Hydroxylated...

20

Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2...  

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

Hydrogen Formation from Proximal Glycol Pairs on TiO2(110). Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2(110). Abstract: Understanding hydrogen formation on TiO2...

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

4, 28772914, 2007 Air-sea O2 flux  

E-Print Network [OSTI]

Variability in air-sea O2 and CO2 fluxes and its impact on atmospheric potential oxygen (APO 2 1 National Center for Atmospheric Research, Boulder, Colorado, USA 2 Dept. of Marine Chemistry-friendly Version Interactive Discussion EGU Abstract A three dimensional, time-evolving field of atmospheric

Paris-Sud XI, Université de

22

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

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

23

Etching of porous and solid SiO2 in Ar/c-C4F8, O2/c-C4F8 and Ar/O2/c-C4F8 plasmas  

E-Print Network [OSTI]

and porous SiO2 in fluorocarbon plasmas and for etching of organic polymers in O2 plasmas have been.1063/1.1834979] I. INTRODUCTION Fluorocarbon plasma etching of SiO2 and low-dielectric constant (low-k) porous SiO2 of pattern transfer by fluorocarbon plasmas is in large part a result of the excellent selectivity which can

Kushner, Mark

24

A Model DMMP/TiO2 (110) Intermolecular Potential Energy Function...  

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

DMMPTiO2 (110) Intermolecular Potential Energy Function Developed from ab Initio Calculations. A Model DMMPTiO2 (110) Intermolecular Potential Energy Function Developed from ab...

25

Catalytic epoxidation of propene with H2O-O2 reactants on Au/TiO2  

E-Print Network [OSTI]

rutile ~4). Propene (4 kPa, Praxair, UHP) epoxidation ratesmeasured using O 2 (4 kPa, Praxair, UHP) at 350 K in theof H 2 (4 kPa, 99.999%, Praxair) or H 2 O (0-12 kPa) using a

Ojeda, Manuel

2009-01-01T23:59:59.000Z

26

Solar Energy Materials & Solar Cells 87 (2005) 181196 Optical filters from SiO2 and TiO2 multi-layers  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 87 (2005) 181­196 Optical filters from SiO2 and TiO2 multi Abstract Sol­gel spin coating process is used to produce optical filters from SiO2 and TiO2 multi- layers­19] properties. They vary according to the chosen substrate, sol, central wavelength, number of layers, optical

Thirumalai, Devarajan

27

Stability and Migration of Charged Oxygen Interstitials in ThO2...  

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

oxygen interstitial mobility in ThO2 than in CeO2. Citation: Xiao HY, Y Zhang, and WJ Weber.2013."Stability and Migration of Charged Oxygen Interstitials in ThO2 and CeO2."Acta...

28

Physisorption of N2, O2, and CO on Fully Oxidized TiO2(110)  

SciTech Connect (OSTI)

Physisorption of N2, O2 and CO was studied on fully oxidized TiO2(110) using beam reflection and temperature programmed desorption (TPD) techniques. Sticking coefficients for all three molecules are nearly equal (0.75 ± 0.05) and approximately independent of coverage suggesting that adsorption occurs via a precursor mediated mechanism. Excluding multilayer coverages, the TPD spectra for all three adsorbates exhibit three distinct coverage regimes that can be interpreted in accord with previous theoretical studies of N2 adsorption. At low coverages (0 to 0.5 N2/Ti4+), N2 molecules bind head-on to five-coordinated Ti4+ ions. The adsorption occurs preferentially on the Ti4+ sites that do not have neighboring adsorbates. This arrangement minimizes the repulsive interactions between the adsorbed molecules along the Ti4+ rows resulting in a relatively small shift of the TPD peak (105 ? 90 K) with increasing coverage. At higher N2 coverages (0 to 1.0 N2/Ti4+) the nearest-neighbor Ti4+ sites become occupied. The close proximity of the adsorbates results in strong repulsion thus giving rise to a significant shift of the TPD leading edges (90 ? 45 K) with increasing coverage. For N2/Ti4+ > 1, an additional low temperature peak (~ 43 K) is present and is ascribed to N2 adsorption on bridge-bonded oxygen rows. The results for O2 and CO are qualitatively similar. The repulsive adsorbate-adsorbate interactions largest for CO, most likely due to aligned CO dipole moments. The coverage dependent binding energies of O2, N2, and CO are determined by inverting TPD profiles.

Dohnalek, Zdenek; Kim, Jooho; Bondarchuk, Oleksander A.; White, J. M.; Kay, Bruce D.

2006-03-30T23:59:59.000Z

29

Heat Transfer between Graphene and Amorphous SiO2  

E-Print Network [OSTI]

We study the heat transfer between graphene and amorphous SiO2. We include both the heat transfer from the area of real contact, and between the surfaces in the non-contact region. We consider the radiative heat transfer associated with the evanescent electromagnetic waves which exist outside of all bodies, and the heat transfer by the gas in the non-contact region. We find that the dominant contribution to the heat transfer result from the area of real contact, and the calculated value of the heat transfer coefficient is in good agreement with the value deduced from experimental data.

B. N. J. Persson; H. Ueba

2010-07-22T23:59:59.000Z

30

trans-K3[TcO2(CN)4  

SciTech Connect (OSTI)

The dioxotetracyanotechnetate anion, [TcO2(CN)4]3-, of the title complex has octahedral symmetry. The technetium is located on a center of inversion and is bound by two oxygen atoms and four cyano ligands. The Tc?O bond distance of 1.7721 (12) Å is consistent with double bond character. The potassium cations [located on special (1/2,0,1) and general positions] reside in octahedral or tetrahedral environments; interionic K···O and K···N interactions occur in the 2.7877 (19)-2.8598 (15) Å range.

Chatterjee, Sayandev; Del Negro, Andrew S.; Edwards, Matthew K.; Twamley, Brendan; Krause, Jeanette A.; Bryan, Samuel A.

2010-07-14T23:59:59.000Z

31

O2Diesel Corporation formerly Dynamic Ventures | 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 ResourcesLoading map...(Utility Company)ReferencesNuiqsut, Alaska:Nutley, NewEnergyO2Diesel Corporation

32

Atmospheric Pressure Chemical Vapor Deposition of High Silica SiO2-TiO2 Antireflective Thin Films for Glass Based Solar Panels  

SciTech Connect (OSTI)

The atmospheric pressure chemical vapor deposition (APCVD) of SiO2-TiO2 thin films employing [[(tBuO)3Si]2O-Ti(OiPr)2], which can be prepared from commercially available materials, results in antireflective thin films on float glass under industrially relevant manufacturing conditions. It was found that while the deposition temperature had an effect on the SiO2:TiO2 ratio, the thickness was dependent on the time of deposition. This study shows that it is possible to use APCVD employing a single source precursor containing titanium and silicon to produce thin films on float glass with high SiO2:TiO2 ratios.

Klobukowski, Erik R [ORNL; Tenhaeff, Wyatt E [ORNL; McCamy, James [PPG; Harris, Caroline [PPG; Narula, Chaitanya Kumar [ORNL

2013-01-01T23:59:59.000Z

33

High-Quality Epitaxy of Ruthenium Dioxide, RuO2, on Rutile Titanium Dioxide, TiO2, by Pulsed Chemical Vapor Deposition  

E-Print Network [OSTI]

of rutile TiO2, a material with a high dielectric constant. Therefore, capacitors with high capacitance per these capacitors have low leakage current. Due to its good redox properties, RuO2 has been made into electrodes films have been made by CVD, such as wide-gap semiconductors ZnO23,25 and SnO2,26,27 super- conducting

34

Silicon (100)/SiO2 by XPS  

SciTech Connect (OSTI)

Silicon (100) wafers are ubiquitous in microfabrication and, accordingly, their surface characteristics are important. Herein, we report the analysis of Si (100) via X-ray photoelectron spectroscopy (XPS) using monochromatic Al K radiation. Survey scans show that the material is primarily silicon and oxygen, and the Si 2p region shows two peaks that correspond to elemental silicon and silicon dioxide. Using these peaks the thickness of the native oxide (SiO2) was estimated using the equation of Strohmeier.1 The oxygen peak is symmetric. The material shows small amounts of carbon, fluorine, and nitrogen contamination. These silicon wafers are used as the base material for subsequent growth of templated carbon nanotubes.

Jensen, David S.; Kanyal, Supriya S.; Madaan, Nitesh; Vail, Michael A.; Dadson, Andrew; Engelhard, Mark H.; Linford, Matthew R.

2013-09-25T23:59:59.000Z

35

Hydrogen Reactivity on Highly-hydroxylated TiO2(110) Surfaces...  

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

TiO2(110) Surfaces Prepared via Carboxylic Acid Adsorption and Photolysis. Hydrogen Reactivity on Highly-hydroxylated TiO2(110) Surfaces Prepared via Carboxylic Acid...

36

Ethanol synthesis from syngas over Rh-based/SiO2 catalysts: A...  

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

over Rh-basedSiO2 catalysts: A combined experimental and theoretical modeling study. Ethanol synthesis from syngas over Rh-basedSiO2 catalysts: A combined experimental and...

37

Investigation of the Rechargeability of Li-O2 Batteries in Non...  

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

the Rechargeability of Li-O2 Batteries in Non-aqueous Electrolyte. Investigation of the Rechargeability of Li-O2 Batteries in Non-aqueous Electrolyte. Abstract: In order to...

38

Investigation of Local Environments in Nafion-SiO2 Composite...  

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

Local Environments in Nafion-SiO2 Composite Membranes used in Vanadium Redox Flow Batteries. Investigation of Local Environments in Nafion-SiO2 Composite Membranes used in Vanadium...

39

Thermodynamic properties of CexTh1-xO2 solid solution from first...  

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

properties of the CexTh1xO2 solid solution. Citation: Xiao HY, Y Zhang, and WJ Weber.2012."Thermodynamic properties of CexTh1-xO2 solid solution from first-principles...

40

SiO2 Fracture: Chemomechanics with a Machine Learning Hybrid...  

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

SiO2 Fracture: Chemomechanics with a Machine Learning Hybrid QMMM Scheme SiO2 Fracture: Chemomechanics with a Machine Learning Hybrid QMMM Scheme. Close-up of a crack tip in a...

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Inorganic-modified semiconductor TiO2 nanotube arrays for photocatalysis  

E-Print Network [OSTI]

titanium dioxide (TiO2) has become a promising route to degrade organic pollutants.5­8 TiO2 is one and efficient technologies to control and reduce pollution growth. Traditional techniques, such as adsorption

Lin, Zhiqun

42

Optical Absorption, Stability and Structure of NpO2+ Complexes with Dicarboxylic Acids  

E-Print Network [OSTI]

Np(V)/IDA complex, the absorption band still shows, but theOptical Absorption, Stability and Structure of NpO 2+and the intensity of the absorption band of NpO 2+ at 980 nm

Guoxin Tian; Linfeng Rao

2006-01-01T23:59:59.000Z

43

2-Propanol Dehydration on TiO2(110): The Effect of Bridge-Bonded...  

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

2-Propanol Dehydration on TiO2(110): The Effect of Bridge-Bonded Oxygen Vacancy Blocking. 2-Propanol Dehydration on TiO2(110): The Effect of Bridge-Bonded Oxygen Vacancy Blocking....

44

Chemical Reactivity of Reduced TiO2(110): The dominant role of...  

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

Reactivity of Reduced TiO2(110): The dominant role of surface defects in oxygen chemisorption. Chemical Reactivity of Reduced TiO2(110): The dominant role of surface defects in...

45

Methylene Bromide Chemistry and Photochemistry on Rutile TiO2...  

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

Methylene Bromide Chemistry and Photochemistry on Rutile TiO2(110). Methylene Bromide Chemistry and Photochemistry on Rutile TiO2(110). Abstract: The chemistry and photochemistry...

46

Alcohol Chemistry on Rutile TiO2(110): The Influence of Alkyl...  

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

Alcohol Chemistry on Rutile TiO2(110): The Influence of Alkyl Substituents on Reactivity and Selectivity. Alcohol Chemistry on Rutile TiO2(110): The Influence of Alkyl Substituents...

47

Surface Chemistry of 2-Propanol on TiO2(110): Low and High Temperature...  

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

Chemistry of 2-Propanol on TiO2(110): Low and High Temperature Dehydration, Isotope Effects, and Influence of Local Surface Chemistry of 2-Propanol on TiO2(110): Low and High...

48

Excellent Sulfur Resistance of Pt/BaO/CeO2 Lean NOx Trap Catalysts...  

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

NOx Trap Catalysts. Excellent Sulfur Resistance of PtBaOCeO2 Lean NOx Trap Catalysts. Abstract: In this work, we investigated the NOx storage behavior of Pt-BaOCeO2 catalysts,...

49

Self-assembled TiO2-Graphene Hybrid Nanostructures for Enhanced...  

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

TiO2-Graphene Hybrid Nanostructures for Enhanced Li-ion Insertion . Self-assembled TiO2-Graphene Hybrid Nanostructures for Enhanced Li-ion Insertion . Abstract: We used anionic...

50

CO Oxidation mechanism on CeO2-supported Au nanoclusters  

SciTech Connect (OSTI)

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.

Kim H. Y.; Henkelman, G.

2013-09-08T23:59:59.000Z

51

6.11 Atmospheric CO2 and O2 During the Phanerozoic: Tools, Patterns, and Impacts  

E-Print Network [OSTI]

6.11 Atmospheric CO2 and O2 During the Phanerozoic: Tools, Patterns, and Impacts DL Royer, Wesleyan.11.2 Models for Atmospheric CO2 and O2 Estimation 251 6.11.2.1 Key Principles 251 6.11.2.2 GEOCARB Models 252.11.2.2.5 Estimates of CO2 and O2 from the GEOCARB model 254 6.11.2.3 Other Models for CO2 and O2 Reconstruction 254 6

Royer, Dana

52

Investigation into Photoconductivity in Single CNF/TiO2-Dye Core–Shell Nanowire Devices  

E-Print Network [OSTI]

A vertically aligned carbon nanofiber array coated with anatase TiO2 (CNF/TiO2) is an attractive possible replacement for the sintered TiO2 nanoparticle network in the original dye-sensitized solar cell (DSSC) design due to the potential...

Li, Zhuangzhi; Rochford, Caitlin; Baca, F. Javier

2010-06-15T23:59:59.000Z

53

Multiscale Modeling of TiO2 Nanoparticle Production in Flame Reactors: Effect of Chemical Mechanism  

E-Print Network [OSTI]

Multiscale Modeling of TiO2 Nanoparticle Production in Flame Reactors: Effect of Chemical Mechanism and Engineering Mechanics, The UniVersity of Texas, Austin, Texas 78712 For titanium dioxide (TiO2) nanoparticles, catalysis, energy, and semiconductors. Titanium dioxide (TiO2) nanoparticles are traditionally used

Raman, Venkat

54

Leakage current and dielectric breakdown behavior in annealed SiO2 aerogel films  

E-Print Network [OSTI]

Leakage current and dielectric breakdown behavior in annealed SiO2 aerogel films Moon-Ho Jo behavior in annealed SiO2 aerogel films for intermetal dielectric applications was investigated in a metal­insulator­semiconductor structure. SiO2 aerogel films with porosities of 70% exhibited Poole­Frenkel conduction both before

Jo, Moon-Ho

55

A UV light enhanced TiO2/graphene device for oxygen sensing at room temperature  

E-Print Network [OSTI]

A UV light enhanced TiO2/graphene device for oxygen sensing at room temperature Jia Zhang,ab Chao temperature oxygen sensor based on TiO2/graphene device was developed with an enhanced sensing performance­hole pairs in the TiO2 film and the photogenerated electrons were scavenged by graphene and percolated

Cao, Wenwu

56

Investigation on the Charging Process of Li2O2-Based Air Electrodes in Li-O2 Batteries with Organic Carbonate Electrolytes  

SciTech Connect (OSTI)

The charge processes of Li-O2 batteries were investigated by analyzing the gas evolution by in situ gas chromatography-mass spectroscopy (GC/MS) technique. The mixture of Li2O2/Fe3O4/Super P carbon/polyvinylidene fluoride (PVDF) was used as the starting air electrode material and 1M LiTFSI in carbonate-based solvents was used as electrolyte. It was found that Li2O2 is reactive to 1-methyl-2-pyrrolidinone and PVDF binder used in the electrode preparation. During the 1st charge (up to 4.6 V), O2 was the main component in the gases released. The amount of O2 measured by GC/MS was consistent with the amount of Li2O2 decomposed in the electrochemical process as measured by the charge capacity, indicative of the good chargeability of Li2O2. However, after the cell was discharged to 2.0 V in O2 atmosphere and re-charged to ~ 4.6 V in the second cycle, CO2 was dominant in the released gases. Further analysis of the discharged air electrode by X-ray diffraction and Fourier transform infrared spectroscopy indicated that lithium-containing carbonate species (lithium alkyl carbonate and/or Li2CO3) were the main reaction products. Therefore, compatible electrolyte and electrodes as well as the electrode preparation procedures need to be developed for long term operation of rechargeable Li-O2 or Li-air batteries.

Xu, Wu; Viswanathan, Vilayanur V.; Wang, Deyu; Towne, Silas A.; Xiao, Jie; Nie, Zimin; Hu, Dehong; Zhang, Jiguang

2011-04-15T23:59:59.000Z

57

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

SciTech Connect (OSTI)

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 C–C 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 C2–C4 product distributions.

Davidson, Stephen; Sun, Junming; Wang, Yong

2013-12-02T23:59:59.000Z

58

High-pressure structure of half-metallic CrO2 B. R. Maddox  

E-Print Network [OSTI]

transition from rutile -CrO2 phase I P42/mnm to orthorhombic -CrO2 phase II CaCl2-like, Pnnm is presented. The transition to the CaCl2 structure, which appears to be second order, occurs at 12±3 GPa without any typically transforms to another sixfold-coordinated structure, CaCl2, or the -PbO2 structure found in shock

Pickett, Warren

59

Surface Passivation of Nanoporous TiO2 via Atomic Layer Deposition of ZrO2 for Solid-State Dye-Sensitized Solar Cell Applications  

E-Print Network [OSTI]

to the spiro-OMeTAD. Introduction Dye-sensitized solar cells (DSCs) based on mesoporous titania and liquidSurface Passivation of Nanoporous TiO2 via Atomic Layer Deposition of ZrO2 for Solid-State Dye-Sensitized Solar Cell Applications Tina C. Li, Ma´rcio S. Go´es,,§ Francisco Fabregat-Santiago,*, Juan Bisquert

60

Class D IOT Transmitter Concept Advantages Challenges  

E-Print Network [OSTI]

· (Year 1) Study detailed physics of grid PM of high-power electron guns ­ Heat load ­ Characteristics Grid, eliminate RF drive Bandwidth and R/Q Matching Simple modulation Grid performance Digital control of FM, AM Matching Beam Supply Floating Deck Grid Pulser System Control Feedback Fiber Optic Interface

Anlage, Steven

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Adsorption States and Mobility of TMAA Molecules on Reduced TiO2...  

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

spectroscopy (XPS) and density functional theory (DFT) studies have probed the bonding configurations and mobility of trimethylacetic acid (TMAA) molecules on TiO2(100)...

62

Atmospheric O2//N2 changes, 19932002: Implications for the partitioning of fossil fuel CO2 sequestration  

E-Print Network [OSTI]

Atmospheric O2//N2 changes, 1993­­2002: Implications for the partitioning of fossil fuel CO2. Cassar (2005), Atmospheric O2/N2 changes, 1993­2002: Implications for the partitioning of fossil fuel CO2. The O2/N2 ratio of air is falling because combustion of fossil fuel and biomass both con- sume O2

Ho, David

63

Carbon monoxide annealed TiO2 nanotube array electrodes for efficient biosensor applications  

E-Print Network [OSTI]

Carbon monoxide annealed TiO2 nanotube array electrodes for efficient biosensor applications by anodic oxidation of titanium foil followed with O2 and CO annealing were employed as matrices consisted of Ti3+ defects with carbon-doping and exhibited well defined quasi-reversible cyclic voltammetric

Cao, Guozhong

64

Capacity Fade Studies of LiCoO2 Based Li-ion Cells Cycled at  

E-Print Network [OSTI]

in capacity of commercially available Sony 18650 Cells cycled at different temperatures. Perform rate of a Sony 18650 Li-ion cell Cathode (positive electrode) - LiCoO2. Anode (negative electrode) - MCMB. Cell capacity ­ 1.8 Ah #12;Characteristics of a Sony 18650 Li-ion cell Characteristics Positive LiCoO2 Negative

Popov, Branko N.

65

Dual Phase Li4 Ti5O12–TiO2 Nanowire Arrays As Integrated...  

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

Phase Li4 Ti5O12–TiO2 Nanowire Arrays As Integrated Anodes For High-rate Lithium-ion Batteries. Dual Phase Li4 Ti5O12–TiO2 Nanowire Arrays As Integrated Anodes For...

66

Surface studies of nitrogen implanted TiO2 Matthias Batzill a,*, Erie H. Morales b  

E-Print Network [OSTI]

.V. All rights reserved. Keywords: Titanium dioxide; Doping; Nitrogen; Surface science 1. IntroductionSurface studies of nitrogen implanted TiO2 Matthias Batzill a,*, Erie H. Morales b , Ulrike Diebold Available online 3 August 2007 Abstract Rutile TiO2(110) single crystals have been doped by nitrogen

Diebold, Ulrike

67

Fabrication of Microfibre-nanowire Junction Arrays of ZnO/SnO2 Composite  

E-Print Network [OSTI]

nanocomposite sensitized with a D35-cpdt dye was investigated. A dye-sensitized solar cell (DSSC) with a Zn discussed. Keywords ZnO/SnO2 Nanocomposite, Dye-sensitized Solar Cell, Nanostructured Surfaces 1O/SnO2 nanocomposite photoanode based on a cobalt electrolyte achieved a solar-to-electricity conversion

Iglic, Ales

68

Enhanced Energy Conversion Efficiency of the Sr2+-Modified Nanoporous TiO2 Electrode Sensitized  

E-Print Network [OSTI]

efficiency achieved with dye-sensitized solar cells may be attributed to the nanoporous TiO2 electrode.3 photon to current efficiency of a solar cell based on the dye Ru[LL(NCS)2] (L ) 2,2-bipyridine-4 cell based on dye-sensitized nanoporous TiO2 thin film electrode, and power conversion efficiency

Huang, Yanyi

69

Solar Energy Materials & Solar Cells 71 (2002) 261271 Photoelectric behavior of nanocrystalline TiO2  

E-Print Network [OSTI]

. A sandwich-type solar cell fabricated by this dye-sensitized nanocrystalline TiO2 film generated 6:1 mA cmÃ?2; Nanocrystalline TiO2; Dye sensitized solar cell; Terpyridyl ruthenium dyes; Photoelectrochemical solar cells unmatched performance in dye staff studied as solar cell sensitizer before 1997. Only recently, a black dye

Huang, Yanyi

70

Laser processing of nanocrystalline TiO2 films for dye-sensitized solar cells  

E-Print Network [OSTI]

Laser processing of nanocrystalline TiO2 films for dye-sensitized solar cells H. Kim,a) G. P­20 m thick) layers incorporated in dye-sensitized solar cells. Laser direct-write is a laser techniques to produce porous nc- TiO2 films required for dye-sensitized solar cells. The dye solar cells

Arnold, Craig B.

71

Hybrid Carbon Nanotubes-TiO2 Photoanodes for High Efficiency Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

Hybrid Carbon Nanotubes-TiO2 Photoanodes for High Efficiency Dye-Sensitized Solar Cells Kadiatou photoanodes for dye- sensitized solar cells (DSCs), based on nanocrystalline TiO2 with limited addition applied (i.e., soaking in TiCl4 to boost open circuit photovoltage). INTRODUCTION Dye-sensitized solar

72

Investigation of the Production of O2(a1 ) in Rectangular  

E-Print Network [OSTI]

is not simply a flow consisting primarily of O2(a) and O2(X) (as in classic COIL singlet-oxygen generation Oxygen- Iodine Laser (ElectricOIL) system. This continuous wave (cw) laser operating on the 1315 nm-section and multi-circular tube discharges. I. Introduction The electrically driven oxygen-iodine laser (Electric

Carroll, David L.

73

Production of interstellar hydrogen peroxide (H2O2) on the surface of dust grains  

E-Print Network [OSTI]

Context. The formation of water on the dust grains in the interstellar medium may proceed with hydrogen peroxide (H2O2) as an intermediate. Recently gas-phase H2O2 has been detected in {\\rho} Oph A with an abundance of ~1E-10 relative to H2. Aims. We aim to reproduce the observed abundance of H2O2 and other species detected in {\\rho} Oph A quantitatively. Methods. We make use of a chemical network which includes gas phase reactions as well as processes on the grains; desorption from the grain surface through chemical reaction is also included. We run the model for a range of physical parameters. Results. The abundance of H2O2 can be best reproduced at ~6E5 yr, which is close to the dynamical age of {\\rho} Oph A. The abundances of other species such as H2CO, CH3OH, and O2 can be reasonably reproduced also at this time. In the early time the gas-phase abundance of H2O2 can be much higher than the current detected value. We predict a gas phase abundance of O2H at the same order of magnitude as H2O2, and an abund...

Du, Fujun; Bergman, Per

2011-01-01T23:59:59.000Z

74

Morphological Dependence of Lithium Insertion in Nanocrystalline TiO2(B) Nanoparticles and Nanosheets  

E-Print Network [OSTI]

Morphological Dependence of Lithium Insertion in Nanocrystalline TiO2(B) Nanoparticles ABSTRACT: The lithium insertion behavior of nanoparticle (3-D) and nanosheet (2- D) architectures of TiO2(B-axis that reduces Li+ -Li+ interactions between C and A2 sites. The calculated lithiation potentials and degree

Henkelman, Graeme

75

Photocatalytic Degradation of VOC's by TOTO's Hydrotect (TiO2 Impregnated) Surfaces  

E-Print Network [OSTI]

1 Photocatalytic Degradation of VOC's by TOTO's Hydrotect (TiO2 Impregnated) Surfaces Eva Land. This report describes the photocatalytic degradation of formaldehyde and methanol, two common VOC's, by TiO2 to produce measurable gas phase concentrations. The extended UV illumination of the tiles resulted in a 50

Bergin, Mike

76

Application of SiO2 aerogel film with low dielectric constant to intermetal dielectrics  

E-Print Network [OSTI]

Application of SiO2 aerogel film with low dielectric constant to intermetal dielectrics Moon-Ho Jo aerogel film was characterized from its structural and chemical viewpoints. High porosity of material infrared spectroscopy (FT-IR) for their chemical states. The improved electrical properties of SiO2 aerogel

Jo, Moon-Ho

77

Photosynthesis Respiration CH2O + O2 CO2 + H2O  

E-Print Network [OSTI]

Energy and life Photosynthesis Respiration CH2O + O2 CO2 + H2O hv Biomass CO2 + H2O CH2O + O2 ASSOCIATED WITH PHOTOSYNTHESIS) #12;ATP*: the "energy currency" of the cell *Adenosine triphospahte) PHOTOSYNTHESIS Light provides the energy for high energy electrons. The source of electrons is water OXIDATIVE

78

Synthesis, characterization and performance of vanadium hexacyanoferrate as electrocatalyst of H2O2  

E-Print Network [OSTI]

in environmental, food, and industrial analysis; it is used to pollution control, to bleach textiles and paper.01­3.0 mM H2O2 was constructed. Limit of detection (S/N = 3) of 4 lM H2O2 was calculated. The proposed

Trikalitis, Pantelis N.

79

Effect of Al addition on the microstructure and electronic structure of HfO2 film  

E-Print Network [OSTI]

Effect of Al addition on the microstructure and electronic structure of HfO2 film X. F. Wang investigated the microstructures and electronic structures of a series of hafnium aluminate HfAlO films with Al concentration ranging from 0% to 100%. When the films evolve from pure HfO2 to pure Al2O3 by increasing

Gong, Xingao

80

Steps on anatase TiO2(101) XUE-QING GONG1  

E-Print Network [OSTI]

of anatase titanium dioxide (TiO2). This surface is of great interest in its own right. TiO2 is one with the theoretical predictions. Step-edge formation energies as well as the adsorption energies of water scale to be related to defects3,4 . Steps are special adsorption sites for molecules5­7 , and most metals

Diebold, Ulrike

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Europium-Doped TiO2 Hollow Nanoshells: Two-Photon Imaging of Cell Binding  

E-Print Network [OSTI]

Europium-Doped TiO2 Hollow Nanoshells: Two-Photon Imaging of Cell Binding Sergio Sandoval,,,§ Jian Laboratory, § Moores Cancer Center, Department of Chemistry & Biochemistry, Department of Nano method to fabricate luminescent monodisperse 200 nm europium-doped hollow TiO2 nanoshell (NS) particles

Kummel, Andrew C.

82

Transformation plasticity and thermoelastic behavior in ZrO2-containing ceramics  

E-Print Network [OSTI]

565 Transformation plasticity and thermoelastic behavior in ZrO2-containing ceramics A. H. Heuer plasticité de transformation dans ZrO2, qui est responsable de la ré- sistance mécanique et de la grande profit. Dans certaines conditions, cette transformation est réversible, autocatalytique et

Paris-Sud XI, Université de

83

MODELING AND CONTROL OF A O2/CO2 GAS TURBINE CYCLE FOR CO2 CAPTURE  

E-Print Network [OSTI]

MODELING AND CONTROL OF A O2/CO2 GAS TURBINE CYCLE FOR CO2 CAPTURE Lars Imsland Dagfinn Snarheim and control of a semi-closed O2/CO2 gas turbine cycle for CO2 capture. In the first part the process predictive control, Gas turbines, CO2 capture 1. INTRODUCTION Gas turbines are widely used for power

Foss, Bjarne A.

84

Dimerization Induced Deprotonation of Water on RuO2(110)  

SciTech Connect (OSTI)

RuO2 has proven to be indispensable as a co-catalyst in numerous systems designed for photocatalytic water splitting. In this study we have carried out a detailed mechanistic study of water behavior on the most stable RuO2 face, RuO2(110), by employing variable temperature scanning tunneling microscopy and density functional theory calculations. We show that water monomers adsorb molecularly on Ru sites, become mobile above 238 K, diffuse along the Ru rows and form water dimers. The onset for dimer diffusion is observed at ~277 K indicating significantly higher diffusion barrier than that for monomers. More importantly, we find that water dimers deprotonate readily to form Ru-bound H3O2 and bridging OH species. The observed behavior is compared and contrasted with that observed for water on isostructural rutile TiO2(110).

Mu, Rentao; Cantu Cantu, David; Lin, Xiao; Glezakou, Vassiliki Alexandra; Wang, Zhitao; Lyubinetsky, Igor; Rousseau, Roger J.; Dohnalek, Zdenek

2014-10-02T23:59:59.000Z

85

Au/PO43-/TiO2 and PO43-/Au/TiO2 catalysts for CO oxidation: effect of synthesis details on catalytic performance  

SciTech Connect (OSTI)

Supported gold catalysts are active for CO oxidation, but the high-temperature deactivation is a shortcoming that may constrain their applications. Herein, we attempted to address this problem by using phosphate-doped Au/TiO{sub 2} synthesized via two routes. In route I, Au/PO{sub 4}{sup 3-}/TiO{sub 2} catalysts were prepared by treating TiO{sub 2} (Degussa P25) with diluted H{sub 3}PO{sub 4}, followed by loading gold via deposition-precipitation. In route II, PO{sub 4}{sup 3-}/Au/TiO{sub 2} catalysts were prepared by treating H{sub 2}-reduced Au/TiO{sub 2} with diluted H{sub 3}PO{sub 4}. These catalysts were systematically pretreated at 200 or 500 C before reaction testing. The overall CO conversion on 200 C-pretreated Au/PO43-/TiO2 or PO43-/Au/TiO2 was always lower than that on 200 C-pretreated Au/TiO2. However, the advantage of the phosphate addition became apparent after thermal treatment at a higher temperature. Both Au/PO43-/TiO2 and PO43-/Au/TiO2 pretreated at 500 C retained significant activities at room temperature, whereas 500 C-pretreated Au/TiO2 lost its activity. Control experiments and catalyst characterization were performed to investigate the impact of synthesis details on catalytic performance.

Ma, Zhen [ORNL; Overbury, Steven {Steve} H [ORNL; Dai, Sheng [ORNL

2007-01-01T23:59:59.000Z

86

Formation of Interfacial Layer and Long-Term Cylability of Li-O-2 Batteries  

SciTech Connect (OSTI)

Extended cycling of the Li-O2 battery under full discharge/charge conditions is achievable upon selection of appropriate electrode materials and cycling protocol. However, the decomposition of the side products also contribute to the observed good cycling behavior of high capacity Li-O2 batteries. Quantitative analyses of the discharge and charge products reveals a quick switch from the predominant formation of Li2O2 to the predominant formation of side products during the first a few cycles of the Li-O2 batteries. After the switch, cycling stabilizes with a repeatable formation of Li2O2/side products at ~1:2 ratio. CNTs/Ru composite electrodes exhibits lower charge voltage and deliver 50 full discharge-charge cycles without sharp capacity drop. Ru coated glass carbon electrode can lead to more than 500 cycles without change in its cycling profiles. The better understanding on Li-O2 reaction processes developed in this work may lead to the further improvement on the long term cycling behavior of high capacity Li-O2 batteries.

Nasybulin, Eduard N.; Xu, Wu; Mehdi, Beata L.; Thomsen, Edwin C.; Engelhard, Mark H.; Masse, Robert C.; Bhattacharya, Priyanka; Gu, Meng; Bennett, Wendy D.; Nie, Zimin; Wang, Chong M.; Browning, Nigel D.; Zhang, Jiguang

2014-07-28T23:59:59.000Z

87

High-pressure phases in SnO2 to 117 GPa Sean R. Shieh*  

E-Print Network [OSTI]

for SnO2 is rutile-type P42/mnm CaCl2-type Pnnm pyrite-type Pa3¯ ZrO2 orthorhombic phase I Pbca cotunnite of phase transitions from rutile P42/mnm to CaCl2-type Pnnm to -PbO2-type Pbcn to pyrite-type Pa3¯ have the rutile to CaCl2-type transforma- tion near 12 GPa. They also reported that the cubic phase was actually

Duffy, Thomas S.

88

Microelectronically fabricated LiCoO2/SiO2/polycrystalline-silicon power cells planarized by chemical mechanical polishing  

E-Print Network [OSTI]

. Integrating a power unit onto a silicon chip requires the implementation of a thin-film solid-state battery as a solid-state electrolyte in our integrated thin-film battery. This SiO2 electrolyte layer is thermally in the fabrication of the integrated solid-state thin-film lithium-ion battery. Polishing the polysilicon layer

89

PVP-Assisted ZrO2 coating on LiMn2O4 spinel cathode nanoparticles prepared by MnO2 nanowire templates  

E-Print Network [OSTI]

solution. Upon annealing at 600 °C in air, an amorphous ZrO2 nanoscale coating layer was obtained [5­10]. Although Li-ion batteries are attractive power-storage devices that have high energy density metal oxide coatings have been reported, studies to improve both the rate capabilities of spinel LiMn2O4

Cho, Jaephil

90

EFFECT OF SiO2 TICKNESSES IN THERMAL-SiO2/PECVD-SiN STACKS ON SURFACE PASSIVATION OF n-TYPE Cz SILICON SUBSTRATES  

E-Print Network [OSTI]

. A prominent example of SiO2 surface passivation is given by the world-record solar cell efficiency of the passivated-emitter and rear locally- diffused (PERL) c-Si solar cell [1]. The surface passivation of the as the standard RCA procedure prior to oxidation in a cleaned quartz furnace tube at high temperat

91

Rate-Dependent Morphology of Li2O2 Growth in Li-O2 Batteries Birger Horstmann,1, 2, 3, 4  

E-Print Network [OSTI]

-generation batteries that can replace conventional combustion technologies [16­21]. Although the stability of oxygen Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA 2 German Aerospace Center continuum model for the growth of Li2O2 crystals in lithium-oxygen batteries with organic electrolytes

Bazant, Martin Z.

92

Microchannel Reactor System Design & Demonstration For On-Site H2O2 Production by Controlled H2/O2 Reaction  

SciTech Connect (OSTI)

We successfully demonstrated an innovative hydrogen peroxide (H2O2) production concept which involved the development of flame- and explosion-resistant microchannel reactor system for energy efficient, cost-saving, on-site H2O2 production. We designed, fabricated, evaluated, and optimized a laboratory-scale microchannel reactor system for controlled direct combination of H2 and O2 in all proportions including explosive regime, at a low pressure and a low temperature to produce about 1.5 wt% H2O2 as proposed. In the second phase of the program, as a prelude to full-scale commercialization, we demonstrated our H2O2 production approach by ‘numbering up’ the channels in a multi-channel microreactor-based pilot plant to produce 1 kg/h of H2O2 at 1.5 wt% as demanded by end-users of the developed technology. To our knowledge, we are the first group to accomplish this significant milestone. We identified the reaction pathways that comprise the process, and implemented rigorous mechanistic kinetic studies to obtain the kinetics of the three main dominant reactions. We are not aware of any such comprehensive kinetic studies for the direct combination process, either in a microreactor or any other reactor system. We showed that the mass transfer parameter in our microreactor system is several orders of magnitude higher than what obtains in the macroreactor, attesting to the superior performance of microreactor. A one-dimensional reactor model incorporating the kinetics information enabled us to clarify certain important aspects of the chemistry of the direct combination process as detailed in section 5 of this report. Also, through mathematical modeling and simulation using sophisticated and robust commercial software packages, we were able to elucidate the hydrodynamics of the complex multiphase flows that take place in the microchannel. In conjunction with the kinetics information, we were able to validate the experimental data. If fully implemented across the whole industry as a result of our technology demonstration, our production concept is expected to save >5 trillion Btu/year of steam usage and >3 trillion Btu/year in electric power consumption. Our analysis also indicates >50 % reduction in waste disposal cost and ~10% reduction in feedstock energy. These savings translate to ~30% reduction in overall production and transportation costs for the $1B annual H2O2 market.

Adeniyi Lawal

2008-12-09T23:59:59.000Z

93

Electrode Characteristics of Individual, MnO2 Coated Carbon Nanotubes  

E-Print Network [OSTI]

MnO2 Coated Carbon Nanotubes Brad L. Corso, Israel Perez,single- walled carbon nanotubes. Li ion cyclic voltammetrysingle-walled carbon nanotubes (SWNTs) that are grown in

Collins, Philip G

2011-01-01T23:59:59.000Z

94

Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2(110)  

SciTech Connect (OSTI)

Understanding hydrogen formation on TiO2 surfaces is of great importance as it could provide fundamental insight into water splitting for hydrogen production using solar energy. In this work, hydrogen formation from glycols having different numbers of methyl end-groups have been studied using temperature pro-grammed desorption on reduced, hydroxylated, and oxidized TiO2(110) surfaces. The results from OD-labeled glycols demon-strate that gas-phase molecular hydrogen originates exclusively from glycol hydroxyl groups. The yield is controlled by a combi-nation of glycol coverage, steric hindrance, TiO2(110) order and the amount of subsurface charge. Combined, these results show that proximal pairs of hydroxyl aligned glycol molecules and subsurface charge are required to maximize the yield of this redox reaction. These findings highlight the importance of geometric and electronic effects in hydrogen formation from adsorbates on TiO2(110).

Chen, Long; Li, Zhenjun; Smith, R. Scott; Kay, Bruce D.; Dohnalek, Zdenek

2014-04-16T23:59:59.000Z

95

FinalTechnicalReport_15U5O2I-11_RPSEA.docx  

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

Technical Report RPSEA - Research Partnership to Secure Energy for America Report No.: 15U502I-11, Rev. 2 Document No.: 15U5O2I-11 Date: 2014-12-30 DNV GL - Report No....

96

Scanning tunneling microscopy investigation of the TiO2 anatase ,,101... surface Wilhelm Hebenstreit,1  

E-Print Network [OSTI]

of tunneling sites in STM. Titanium dioxide (TiO2) is a versatile material that finds uses as a promoter. Fourfold-coordinated Ti atoms at step edges are preferred adsorption sites and allow the identification

Diebold, Ulrike

97

EPR Study of the Surface Characteristics of Nanostructured TiO2 under UV Irradiation  

E-Print Network [OSTI]

EPR Study of the Surface Characteristics of Nanostructured TiO2 under UV Irradiation Juan M of EPR spectroscopy. The samples of the H series present the smallest crystallite size and after

98

Invoking any Intel compiler with -g defaults to -O2 optimization...  

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

Invoking any Intel compiler with a Cray wrapper with -g defaults to -O2 optimization contrary to the Intel compiler man pages Invoking any Intel compiler with a Cray wrapper with...

99

Formation of O Adatom Pairs and Charge Transfer upon O-2 Dissociation...  

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

Furthermore, our results suggest that the itinerant electrons associated with the O vacancies are being utilized in the O2 dissociation process at the Ti row, whereas at least...

100

Vacancy Assisted Diffusion of Alkoxy Species on Rutile TiO2(110...  

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

vacancy sites. For reduced rutile TiO2(110)-1×1, the bridge-bonded oxygen (BBO) vacancies (BBOV’s) are the most prevalent surface defects and, as has been shown, they...

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Scanning tunneling microscopic studies of SiO2 thin film supported metal nano-clusters  

E-Print Network [OSTI]

This dissertation is focused on understanding heterogeneous metal catalysts supported on oxides using a model catalyst system of SiO2 thin film supported metal nano-clusters. The primary technique applied to this study is scanning tunneling...

Min, Byoung Koun

2005-11-01T23:59:59.000Z

102

Porous TiO2 microspheres with tunable properties for photocatalytic air purification Alberto Naldoni a,  

E-Print Network [OSTI]

, continuous operation, facile scale-up process from small to large production, and thorough control overPorous TiO2 microspheres with tunable properties for photocatalytic air purification Alberto

Suslick, Kenneth S.

103

Understanding of catalytic behaviors of TiO2/CuOx catalysts  

SciTech Connect (OSTI)

Aiming to reveal the catalysis at the metal-oxide and oxide-oxide interfaces,1,2 the water-gas shift reaction (WGS, CO + H2O and #61664; CO2 + H2) and CO oxidation (2CO + O2 and #61664; 2CO2) at the interface of the Cu(111) and Cu2O(111) supported TiO2 clusters were studied based on DFT calculations

Kim H. Y.; Liu, P.

2013-09-08T23:59:59.000Z

104

Electrochemical evaluation of LiCoO2 synthesized by decomposition and intercalation of hydroxides  

E-Print Network [OSTI]

in commercial lithi- um-ion battery manufacturing [4±6]. Synthesis of LiCoO2 is typically carried out by a solid-state March 1998; accepted in revised form 19 May 1998 LiCoO2 has been synthesized by a solid-state synthesis the electrochemical perfor- mance. In a previous paper [13], we reported a new solid- state reaction method that can

Sadoway, Donald Robert

105

Ultrafast Photooxidation of Mn(II)-Terpyridine Complexes Covalently Attached to TiO2 Nanoparticles  

E-Print Network [OSTI]

-energy conversion by dye-sensitized solar cells,1,2 photocatalysis,3-6 and molecular electronics.7,8 Most previous-cost, high-efficiency solar cell based on Ru-dye sensitization of colloidal TiO2 films.1 Presently, the most studies have been focused on TiO2 nanoparticles sensitized with Ru dyes,9,10 although IET in other

106

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

SciTech Connect (OSTI)

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.

Kim H. Y.; Henkelman, G.

2013-01-14T23:59:59.000Z

107

Deep observations of O2 toward a low-mass protostar with Herschel-HIFI  

E-Print Network [OSTI]

According to traditional gas-phase chemical models, O2 should be abundant in molecular clouds, but until recently, attempts to detect interstellar O2 line emission with ground- and space-based observatories have failed. Following the multi-line detections of O2 with low abundances in the Orion and rho Oph A molecular clouds with Herschel, it is important to investigate other environments, and we here quantify the O2 abundance near a solar-mass protostar. Observations of O2, at 487 GHz toward a deeply embedded low-mass Class 0 protostar, NGC 1333-IRAS 4A, are presented, using the HIFI instrument on the Herschel Space Observatory. Complementary data of the chemically related NO and CO molecules are obtained as well. The high spectral resolution data are analysed using radiative transfer models to infer column densities and abundances, and are tested directly against full gas-grain chemical models. The deep HIFI spectrum fails to show O2 at the velocity of the dense protostellar envelope, implying one of the low...

Y?ld?z, Umut A; Goldsmith, Paul F; van Dishoeck, Ewine F; Melnick, Gary; Snell, Ronald; Liseau, Rene; Chen, Jo-Hsin; Pagani, Laurent; Bergin, Edwin; Caselli, Paola; Herbst, Eric; Kristensen, Lars E; Visser, Ruud; Lis, Dariusz C; Gerin, Maryvonne

2013-01-01T23:59:59.000Z

108

Mineralization of Basalts in the CO2-H2O-SO2-O2 System. | EMSL  

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

SO2-O2 System. Mineralization of Basalts in the CO2-H2O-SO2-O2 System. Abstract: Sequestering carbon dioxide (CO2) containing minor amounts of co-contaminants in geologic...

109

Thermodynamics of spinel LixTiO2 from first principles M. Wagemaker a,*, A. Van Der Ven b  

E-Print Network [OSTI]

phases differ in the sites occupied by Li: in Li1/2TiO2 and LiTiO2 Li occupies the crystallographic 8a to composi- tion LiTiO2 [2]. Other titanium oxide compounds stud- ied in relation to Li intercalation include sites in LiTiO2 [6]. The latter structure 0301-0104/$ - see front matter Ã? 2005 Elsevier B.V. All rights

Ceder, Gerbrand

110

Integrated feature scale modeling of plasma processing of porous and solid SiO2 . I. Fluorocarbon etching  

E-Print Network [OSTI]

Integrated feature scale modeling of plasma processing of porous and solid SiO2 . I. Fluorocarbon these issues, reaction mechanisms for fluorocarbon plasma etching of SiO2 in C2F6 , CHF3 , and C4F8 chemistries typically involve SiO2 based materials which are etched in fluorocarbon plasmas.6,7 Porous SiO2 PS is one

Kushner, Mark

111

Increasing the Conversion Efficiency of Dye-Sensitized TiO2 Photoelectrochemical Cells by Coupling to Photonic Crystals  

E-Print Network [OSTI]

The mechanism of enhancing the light harvesting efficiency of dye-sensitized TiO2 solar cells by coupling TiO2Increasing the Conversion Efficiency of Dye-Sensitized TiO2 Photoelectrochemical Cells by Coupling to conventional single-crystal solar cells. In this cell, an optically excited dye injects electrons

112

DOI: 10.1002/asia.201200349 Dye-Sensitized TiO2 Nanotube Solar Cells: Rational Structural and Surface  

E-Print Network [OSTI]

DOI: 10.1002/asia.201200349 Dye-Sensitized TiO2 Nanotube Solar Cells: Rational Structural employed to substitute TiO2 nanoparticles for use in dye-sensitized solar cells. To fur- ther improve the performance of dye-sensitized TiO2 nanotube solar cells, efforts have been directed toward the optimization

Lin, Zhiqun

113

Measurement of positive gain on the 1315 nm transition of atomic iodine pumped by O2,,a1  

E-Print Network [OSTI]

state I 2 P3/2 . Conventionally, the O2 1 is produced by a liquid chemistry singlet oxygen generator of gain. © 2004 American Institute of Physics. [DOI: 10.1063/1.1784519] The classic chemical oxygen the metastable excited singlet oxygen molecule, O2 a1 [de- noted O2 1 hereafter], and the iodine atom ground

Carroll, David L.

114

Synthesis and structure of Al clusters supported on TiO2,,110...: A scanning tunneling microscopy study  

E-Print Network [OSTI]

Synthesis and structure of Al clusters supported on TiO2,,110...: A scanning tunneling microscopy, Texas 77843-3255 Received 14 October 1997; accepted 6 April 1998 Al clusters supported on TiO2(110) have been investigated using scanning tunneling microscopy. Al interacts strongly with the TiO2(110) surface

Goodman, Wayne

115

A Study of Oxygen Vacancy Formation and Annihilation in Submonolayer Coverages of TiO2 Dispersed on MCM-48  

E-Print Network [OSTI]

A Study of Oxygen Vacancy Formation and Annihilation in Submonolayer Coverages of TiO2 Dispersed.932), suggesting the formation of oxygen vacancies. The fraction of Ti that could be reduced increased with TiO2 the TiO2 overlayer as the size of the titania patches increases. The amount of oxygen removed during

Bell, Alexis

116

Structure, Properties, and Dynamics of Oxygen Vacancies in Amorphous SiO2 Zhong-Yi Lu,1  

E-Print Network [OSTI]

Structure, Properties, and Dynamics of Oxygen Vacancies in Amorphous SiO2 Zhong-Yi Lu,1 C. J vacancies in SiO2 have long been regarded as bistable, forming a Si-Si dimer when neutral and a puckered configuration when positively charged. We report first-principles calculations of O vacancies in amorphous SiO2

Pantelides, Sokrates T.

117

Effects of electrolyte salts on the performance of Li-O2 batteries  

SciTech Connect (OSTI)

It is well known that the stability of nonaqueous electrolyte is critical for the rechargeable Li-O2 batteries. Although stability of many solvents used in the electrolytes has been investigated, considerably less attention has been paid to the stability of electrolyte salt which is the second major component. Herein, we report the systematic investigation of the stability of seven common lithium salts in tetraglyme used as electrolytes for Li-O2 batteries. The discharge products of Li-O2 reaction were analyzed by X-ray diffraction, X-ray photoelectron spectroscopy and nuclear magnetic resonance spectroscopy. The performance of Li-O2 batteries was strongly affected by the salt used in the electrolyte. Lithium tetrafluoroborate (LiBF4) and lithium bis(oxalato)borate (LiBOB) decompose and form LiF and lithium borates, respectively during the discharge of Li-O2 batteries. Several other salts, including lithium bis(trifluoromethane)sulfonamide (LiTFSI), lithium trifluoromethanesulfonate (LiTf), lithium hexafluorophosphate (LiPF6), lithium perchlorate (LiClO4) , and lithium bromide (LiBr) led to the discharge products which mainly consisted of Li2O2 and only minor signs of decomposition of LiTFSI, LiTf, LPF6 and LiClO4 were detected. LiBr showed the best stability during the discharge process. As for the cycling performance, LiTf and LiTFSI were the best among the studied salts. In addition to the instability of lithium salts, decomposition of tetraglyme solvent was a more significant factor contributing to the limited cycling stability. Thus a more stable nonaqueous electrolyte including organic solvent and lithium salt still need to be further developed to reach a fully reversible Li-O2 battery.

Nasybulin, Eduard N.; Xu, Wu; Engelhard, Mark H.; Nie, Zimin; Burton, Sarah D.; Cosimbescu, Lelia; Gross, Mark E.; Zhang, Jiguang

2013-02-05T23:59:59.000Z

118

Dendrimer-Encapsulated Ruthenium Nanoparticles as Catalysts for Lithium-O2 Batteries  

SciTech Connect (OSTI)

Dendrimer-encapsulated ruthenium nanoparticles (DEN-Ru) have been used as catalysts in lithium-O2 batteries for the first time. Results obtained from UV-vis spectroscopy, electron microscopy and X-ray photoelectron spectroscopy show that the nanoparticles synthesized by the dendrimer template method are ruthenium oxide instead of metallic ruthenium reported earlier by other groups. The DEN-Ru significantly improve the cycling stability of lithium (Li)-O2 batteries with carbon black electrodes and decrease the charging potential even at low catalyst loading. The monodispersity, porosity and large number of surface functionalities of the dendrimer template prevent the aggregation of the ruthenium nanoparticles making their entire surface area available for catalysis. The potential of using DEN-Ru as stand-alone cathode materials for Li-O2 batteries is also explored.

Bhattacharya, Priyanka; Nasybulin, Eduard N.; Engelhard, Mark H.; Kovarik, Libor; Bowden, Mark E.; Li, Shari; Gaspar, Daniel J.; Xu, Wu; Zhang, Jiguang

2014-12-01T23:59:59.000Z

119

Dissociative electron attachment and electron-impact resonant dissociation of vibrationally excited O2 molecules  

E-Print Network [OSTI]

State-by-state cross sections for dissociative electron attachment and electron-impact dissociation for molecular oxygen are computed using ab initio resonance curves calculated with the R-matrix method. When O2 is in its vibrational ground state, the main contribution for both processes comes from the $^2\\Pi_u$ resonance state of $O_2^-$ but with a significant contribution from the $^4\\Sigma$ resonant state. Vibrational excitation leads to an increased contribution from the low-lying $^2\\Pi_{g}$ resonance, greatly increased cross sections for both processes, and the threshold moving to lower energies. These results provide important input for models of O2-containing plasmas in nonequilibrium conditions.

Laporta, V; Tennyson, J

2015-01-01T23:59:59.000Z

120

The Stability of Organic Solvents and Carbon Electrode in Nonaqueous Li-O2 Batteries  

SciTech Connect (OSTI)

The effect of different kinds of aprotic organic solvents on the discharge performance and discharge products in Li-O2 batteries was systematically investigated. The discharge products deposited in air cathodes were analyzed by X-ray diffraction, in situ gas chromatography/mass spectroscopy and X-ray photoelectron spectroscopy. We found that a significant amount of Li2O2 can be formed in glyme-based electrolytes during the discharge process, while only small amount of Li2O2 is produced in electrolytes of phosphate, nitrile, ionic liquid and sulfoxide. However, in all the seven types of solvent systems we studied, Li2CO3 and LiF were still formed as byproducts whose compositions are strongly related to the solvents. Li2CO3 is produced not from the carbon air electrode but from oxidation and decomposition of the solvent as we verified by using a 13C-labeled carbon electrode and the solid-state 13C-MAS NMR technique. The formation of Li2CO3 and LiF during discharge will greatly reduce the Coulombic efficiency and cycle life of the Li-air batteries. Therefore, better electrolytes that can ensure the formation of Li2O2 but minimize other reaction products formed on air electrodes of Li-air batteries need to be further investigated.

Xu, Wu; Hu, Jian Z.; Engelhard, Mark H.; Towne, Silas A.; Hardy, John S.; Xiao, Jie; Feng, Ju; Hu, Mary Y.; Zhang, Jian; Ding, Fei; Gross, Mark E.; Zhang, Jiguang

2012-05-18T23:59:59.000Z

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Formation of CO precursors during char gasification with O2, CO2 and H2O  

E-Print Network [OSTI]

Formation of CO precursors during char gasification with O2, CO2 and H2O Alejandro Montoya a are presented to get insight into an unified mechanism of uncatalyzed carbon gasification. D 2002 Elsevier Science B.V. All rights reserved. Keywords: Gasification; Chemisorption; Molecular simulation; Surface

Truong, Thanh N.

122

Enhanced Photovoltaic Performance of Nanostructured Hybrid Solar Cell Using Highly Oriented TiO2 Nanotubes  

E-Print Network [OSTI]

-called third generation of solar cells including dye-sensitized solar cells, DSCs2,3 and organic phoEnhanced Photovoltaic Performance of Nanostructured Hybrid Solar Cell Using Highly Oriented TiO2 nanotubes can be effectively controlled for the suitable use for a hybrid solar cell by varying the diameter

Cao, Guozhong

123

Hierarchical TiO2Si nanowire architecture with photoelectrochemical activity under visible light illumination  

E-Print Network [OSTI]

systems are currently less competitive than common solar panels, which to a great extent limits decoration approach opens a new window to tailoring electrical properties of TiO2 for wider spectrum solar energy harvesting and conversion. Owing to the abundance, cleanness, potentially low-cost

Wang, Xudong

124

Dopant location identification in Nd3+ -doped TiO2 nanoparticles  

E-Print Network [OSTI]

Dopant location identification in Nd3+ -doped TiO2 nanoparticles W. Li Department of Materials. The identification of dopant position and its local environ- ment are essential to explore the effect of doping. X and Technology, Gaithersburg, Maryland 20899, USA C. Ni Department of Materials Science and Engineering

Frenkel, Anatoly

125

Investigation of the Rechargeability of Li-O2 Batteries in Non-aqueous Electrolyte  

SciTech Connect (OSTI)

In order to understand the nature of the limited cycle life and poor energy efficiency associated with the secondary Li-O¬2 batteries the discharge products of primary Li-O2 cells at different depth of discharge (DOD) are systematically analyzed in this work. It is revealed that if discharged to 2.0 V a small amount of Li2O2 coexist with Li2CO3 and RO-(C=O)-OLi) in alkyl carbonate-based electrolyte. Further discharging the air electrodes to below 2.0 V the amount of Li2CO3 and LiRCO3 increases significantly due to the severe electrolyte decomposition. There is no Li2O detected in this alkyl carbonate electrolyte regardless of DOD. It is also found that the alkyl carbonate based electrolyte begins to decompose at 4.0 V during charging under the combined influences from the high surface area carbon, the nickel metal current collector and the oxygen atmosphere. Accordingly the impedance of the Li-O2 cell continues to increase after each discharge and recharge process indicating a repeated plating of insoluble lithium salts on the carbon surface. Therefore the whole carbon electrode becomes completely insulated only after a few cycles and loses the function of providing active tri-phase regions for the Li-oxygen batteries.

Xiao, Jie; Hu, Jian Z.; Wang, Deyu; Hu, Dehong; Xu, Wu; Graff, Gordon L.; Nie, Zimin; Liu, Jun; Zhang, Jiguang

2011-07-01T23:59:59.000Z

126

The influence of surface conductivity on the apparent zeta potential of TiO2 nanoparticles  

E-Print Network [OSTI]

Titanium dioxide is widely used as TiO2 nanoparticles and has a large variety of potential applications in of these properties, the surface ionization of titanium dioxide nanoparticles in contact with an electrolytic solution is a physico-chemical parameter of particular importance to describe ion adsorption and electrostatic

Paris-Sud XI, Université de

127

Absorption Spectra Related to Heterogeneous Electron Transfer Reactions: The Perylene TiO2 System  

E-Print Network [OSTI]

Absorption Spectra Related to Heterogeneous Electron Transfer Reactions: The Perylene TiO2 System Form: March 16, 2005 Linear absorption spectra of dye-semiconductor systems (perylene attached displaying line broadenings follow the qualitative trend obtained from transient absorption spectra. I

Röder, Beate

128

SELECTIVE FILTER FOR SnO2 BASED GAS SENSOR : APPLICATION TO HYDROGEN TRACE DETECTION  

E-Print Network [OSTI]

are requested in several fields such as applications [1], fuel cell [2], radioactive waste storage and diverse selectivity of a sensor includes the addition of a catalyst to the tin oxide powder. In the case of hydrogen1 SELECTIVE FILTER FOR SnO2 BASED GAS SENSOR : APPLICATION TO HYDROGEN TRACE DETECTION G

Paris-Sud XI, Université de

129

Optical excitations of metallic nanoclusters buried in TiO2 for solar photochemistry  

E-Print Network [OSTI]

to the solar spectrum.3 A natural dielectric to consider is to encapsulate these metal clusters supported on TiOptical excitations of metallic nanoclusters buried in TiO2 for solar photochemistry Fei WangV range, a much better match to the solar spectrum than the 3.8 eV Ag plasmon. AFM measurements indicate

130

NOx-Mediated Homogeneous Pathways for the Synthesis of Formaldehyde from CH4-O2 Mixtures  

E-Print Network [OSTI]

CH4 conversion, because weaker C-H bonds in HCHO and CH3OH relative to CH4 lead to their fast that the O2 distribution along a reactor will not improve HCHO yields but may prove useful to inhibit NOx losses to less reactive N-compounds. 1. Introduction The practical conversion of remote natural gas

Iglesia, Enrique

131

Probing the Failure Mechanism of SnO2 Nanowires for Sodium-ion Batteries  

SciTech Connect (OSTI)

Non-lithium metals such as sodium have attracted wide attention as a potential charge carrying ion for rechargeable batteries, performing the same role as lithium in lithium- ion batteries. As sodium and lithium have the same +1 charge, it is assumed that what has been learnt about the operation of lithium ion batteries can be transferred directly to sodium batteries. Using in-situ TEM, in combination with DFT calculations, we probed the structural and chemical evolution of SnO2 nanowire anodes in Na-ion batteries and compared them quantitatively with results from Li-ion batteries [Science 330 (2010) 1515]. Upon Na insertion into SnO2, a displacement reaction occurs, leading to the formation of amorphous NaxSn nanoparticles covered by crystalline Na2O shell. With further Na insertion, the NaxSn core crystallized into Na15Sn4 (x=3.75). Upon extraction of Na (desodiation), the NaxSn core transforms to Sn nanoparticles. Associated with a volume shrinkage, nanopores appear and metallic Sn particles are confined in hollow shells of Na2O, mimicking a peapod structure. These pores greatly increase electrical impedance, therefore naturally accounting for the poor cyclability of SnO2. DFT calculations indicate that Na+ diffuses 30 times slower than Li+ in SnO2, in agreement with in-situ TEM measurement. Insertion of Na can chemo-mechanically soften the reaction product to greater extent than in lithiation. Therefore, in contrast to the lithiation of SnO2, no dislocation plasticity was seen ahead of the sodiation front. This direct comparison of the results from Na and Li highlights the critical role of ionic size and electronic structure of different ionic species on the charge/discharge rate and failure mechanisms in these batteries.

Gu, Meng; Kushima, Akihiro; Shao, Yuyan; Zhang, Jiguang; Liu, Jun; Browning, Nigel D.; Li, Ju; Wang, Chong M.

2013-09-30T23:59:59.000Z

132

Dynamic compression of SiO2: A new interpretation Joseph A. Akins and Thomas J. Ahrens  

E-Print Network [OSTI]

2002. [1] In light of recent discoveries of post-stishovite phases of SiO2, with the CaCl2 and a-PbO2 that transition occurs to stishovite, then the CaCl2 structure and finally to melt. INDEX TERMS: 8147 Evolution transforms to the CaCl2 (ro = 4.291 g/cm3 ) and a-PbO2 (ro = 4.334 g/cm3 ) structures, slightly more dense

Stewart, Sarah T.

133

Cr, N-Codoped TiO2 Mesoporous Microspheres for Li-ion Rechargeable Batteries with Enhanced Electrochemical Performance  

SciTech Connect (OSTI)

Cr,N-codoped TiO2 mesoporous microspheres synthesized using hydrothermal and subsequent nitridation treatment, exhibited higher solubility of nitrogen, and improved electrical conductivity than N-doped TiO2, as anode for Lithium-ion rechargeable batteries, which led to improving charge-discharge capacity at 0.1 C and twice higher rate capability compared to that of nitrogen-doped TiO2 mesoporous microsphere at 10 C

Bi, Zhonghe [ORNL] [ORNL; Paranthaman, Mariappan Parans [ORNL] [ORNL; Guo, Bingkun [ORNL] [ORNL; Unocic, Raymond R [ORNL] [ORNL; Meyer III, Harry M [ORNL] [ORNL; Bridges, Craig A [ORNL] [ORNL; Sun, Xiao-Guang [ORNL] [ORNL; Dai, Sheng [ORNL] [ORNL

2014-01-01T23:59:59.000Z

134

Rhodium Catalysts in the Oxidation of CO by O2 and NO: Shape, Composition, and Hot Electron Generation  

E-Print Network [OSTI]

the manifold was filled with 40 Torr CO (Praxair, UHP), 100Torr O 2 (Praxair, UHP), and abalance of He (Praxair, UHP) initially at atmospheric

Renzas, James R.

2010-01-01T23:59:59.000Z

135

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

SciTech Connect (OSTI)

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.

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

136

Two-stage epitaxial growth of vertically-aligned SnO2 nano-rods on(001) ceria  

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

Growth of high-aspect ratio oriented tin oxide, SnO2, nano-rods is complicated by a limited choice of matching substrates. We show that a (001) cerium oxide, CeO2, surface uniquely enables epitaxial growth of tin-oxide nano-rods via a two-stage process. First, (100) oriented nano-wires coat the ceria surface by lateral growth, forming a uniaxially-textured SnO2 deposit. Second, vertical SnO2nano-rods nucleate on the deposit by homoepitaxy. We demonstrate growth of vertically oriented 1-2 ?m long nano-rods with an average diameter of ?20 nm.

Solovyov, Vyacheslav F. [Brookhaven National Lab. (BNL), Upton, NY (United States); Wu, Li-jun [Brookhaven National Lab. (BNL), Upton, NY (United States); Rupich, Martin W. [American Superconductor, Devens, MA (United States); Sathyamurthy, Srivatsan [American Superconductor, Devens, MA (United States); Li, Xiaoping [American Superconductor, Devens, MA (United States); Li, Qiang [Brookhaven National Lab. (BNL), Upton, NY (United States)

2014-12-01T23:59:59.000Z

137

Active Oxygen on Au/TiO2 Catalysts DOI: 10.1002/anie.201102062 Active oxygen on a Au/TiO2 catalyst Formation, stability and CO  

E-Print Network [OSTI]

1 Active Oxygen on Au/TiO2 Catalysts DOI: 10.1002/anie.201102062 Active oxygen on a Au/TiO2 are the activation of molecular oxygen, the active site for this reaction step, and the nature of the catalytically active oxygen species present under working conditions.[3;9-15] Stiehl et al. had shown that molecularly

Pfeifer, Holger

138

Atomistic Studies of Cation Transport in Tetragonal ZrO2 During Zirconium Corrosion  

SciTech Connect (OSTI)

Zirconium alloys are the major fuel cladding materials in current reactors. The water-side corrosion is one of the major degradation mechanisms of these alloys. During corrosion the transport of oxidizing species in zirconium dioxide (ZrO2) determines the corrosion kinetics. Previously it has been argued that the outward diffusion of cation ions is important for forming protective oxides. In this work, the migration of Zr defects in tetragonal ZrO2 is studied with temperature accelerated dynamics and molecular dynamics simulations. The results show that Zr interstitials have anisotropic diffusion and migrate preferentially along the [001] or c direction in tetragonal ZrO2. The compressive stresses can increase the Zr interstitial migration barrier significantly. The migration barriers of some defect clusters can be much lower than those of point defects. The migration of Zr interstitials at some special grain boundaries is much slower than in a bulk oxide. The implications of these atomistic simulation results in the Zr corrosion are discussed.

Xian-Ming Bai; Yongfeng Zhang; Michael R. Tonks

2013-10-01T23:59:59.000Z

139

SnO2:F Coated Duplex Stainless Steel for PEM Fuel Cell Bipolar Plates  

SciTech Connect (OSTI)

Duplex 2205 stainless steel was deposited with 0.6 {micro}m thick SnO2:F coating; coated steel was characterized for PEMFC bipolar plate application. Compared with bare alloy, interfacial contact resistance (ICR) values of the coated 2205 steel are higher. SnO2:F coating adds its own resistance to the air-formed film on the steel. In a PEMFC anode environment, a current peak of ca. 25 {micro}A/cm2 registered at ca. 30 min for coated 2205 steel. It stabilized at ca. 2.0 {approx} -1.0 {micro}A/cm2. This peak is related to the complicated process of coating dissolution and oxide-layer formation. Anodic-cathodic current transfer occurred at ca. 200 min polarization. In a PEMFC cathode environment, current was stable immediately after polarization. The stable current was ca. 0.5 {approx} 2.0 {micro}A/cm2 during the entire polarization period. AES depth profiles with tested samples and ICP analysis with the tested solutions confirmed the excellent corrosion resistance of the SnO2:F coated 2205 alloy in simulated PEMFC environments.

Wang, H.; Turner, J. A.

2008-01-01T23:59:59.000Z

140

Off-normal CO2 desorption from the photooxidation of CO on reduced TiO2(110)  

SciTech Connect (OSTI)

Photo-induced reactions between O2 and CO on reduced rutile TiO2(110) are studied at low temperature (~30K). Photon stimulated desorption (PSD) of O2, CO2 and CO are observed with comparable yields. Isotope labeling experiments indicate that O2 chemisorbed in a vacancy is more active for photooxidation than O2 chemisorbed on a Ti5c site. The angular distribution for the desorbing CO2 is peaked at ~40º with respect to the surface normal in the azimuth (i.e. perpendicular to the bridging oxygen rows) suggesting that CO2 is produced from O2 occupying an oxygen vacancy and CO adsorbed on a Ti5c site next to it. The experimental results are consistent with CO2 being produced from a transition state complex that has been predicted theoretically. The CO PSD from TiO2(110) is enhanced dramatically by the presence of chemisorbed O2 suggesting that it is a by-product of the CO photooxidation process.

Petrik, Nikolay G.; Kimmel, Gregory A.

2010-09-02T23:59:59.000Z

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Performance study of commercial LiCoO2 and spinel-based Li-ion cells  

E-Print Network [OSTI]

-ion cells and Sony 18650 cells using non-stoichiometric spinel and LiCoO2, respectively, as positive at the cathode and loss of active material at both electrodes due to electrolyte oxidation. For the Sony cells Science B.V. All rights reserved. Keywords: Li-ion cells; LiCoO2; Cell-Batt1 ; Capacity fade; Sony 18650

Popov, Branko N.

142

Improved Lithium Ion Behavior Properties of TiO2@Graphitic-like Carbon Core@Shell Nanostructure  

E-Print Network [OSTI]

Improved Lithium Ion Behavior Properties of TiO2@Graphitic-like Carbon Core@Shell Nanostructure Min Intercalation Electrochemistry Capacitance Lithium Ion batteries A B S T R A C T We demonstrate TiO2@graphitic on the electrode surface and enhanced lithium ion intercalation, leading to lower charge transfer resistance

Cao, Guozhong

143

Oriented Hierarchical Porous TiO2 Nanowires on Ti Substrate: Evolution of Nanostructures for Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

of highly-oriented anatase TiO2 nanocrystals, are adopted as photoelectrodes in dye-sensitized solar cells. [1­4]. In particular, lightweight and flexible dye-sensitized solar cells (DSSCs) have received muchOriented Hierarchical Porous TiO2 Nanowires on Ti Substrate: Evolution of Nanostructures for Dye-Sensitized

Park, Byungwoo

144

First-principles study of magnetism in spinel MnO2 Dane Morgan and Billie Wang  

E-Print Network [OSTI]

First-principles study of magnetism in spinel MnO2 Dane Morgan and Billie Wang Department to calculate the ground state, transition tem- perature, and thermodynamic properties of magnetic excitations in spinel MnO2 . The magnetic interactions are mapped onto a Heisenberg model whose exchange interactions

Ceder, Gerbrand

145

CO oxidation over Ru(0001) at near-atmospheric pressures: From chemisorbed oxygen to RuO2  

E-Print Network [OSTI]

modulation Infrared reflection absorption spectroscopy Reaction kinetics a b s t r a c t RuO2(110) was formed polarization modulation infrared reflection absorption spectroscopy (PM-IRAS) and post-reaction Auger electronCO oxidation over Ru(0001) at near-atmospheric pressures: From chemisorbed oxygen to RuO2 Feng Gao

Goodman, Wayne

146

Dye Surface Coating Enables Visible Light Activation of TiO2 Nanoparticles Leading to Degradation of  

E-Print Network [OSTI]

Dye Surface Coating Enables Visible Light Activation of TiO2 Nanoparticles Leading to Degradation that an alizarin red S ~ARS! dye coating on TiO2 nanoparticles enables visible light activation of reactive oxygen species. Successful coating of nanoparti- cles with dye is demonstrated through

Brown, Eric

147

Preparation and characterization of VOx/TiO2 catalytic coatings on stainless steel plates for structured catalytic reactors.  

E-Print Network [OSTI]

for structured catalytic reactors. Thierry Giornelli, Axel Löfberg* and Elisabeth Bordes-Richard Unité de.Lofberg@univ-lille1.fr Abstract The parameters to be controlled to coat metallic walls by VOx/TiO2 catalysts which) was chosen because of its large application in industrial catalytic reactors. TiO2 films on stainless steel

Boyer, Edmond

148

Evidence for Strain-Induced Local Conductance Modulations in Single-Layer Graphene on SiO2  

E-Print Network [OSTI]

Evidence for Strain-Induced Local Conductance Modulations in Single-Layer Graphene on SiO2 M. L, California Institute of Technology, Pasadena, CA 91125 (Dated: June 8, 2009) Graphene has emerged modulations in the local conductance of single- layer graphene on SiO2 substrates from scanning tunneling

Yeh, Nai-Chang

149

Performance of Gd-doped Ti-based Sb-SnO2 anodes for electrochemical destruction of phenol  

E-Print Network [OSTI]

by a thermal deposition method. Phenol degradation followed first-order rate kinetics, with the maxi- mum rate with the control (plain Ti/SnO2-Sb). TOC removal and UV scans revealed that different intermediates were produced reserved. Keywords: Gd; SnO2; DSA electrode; Phenol; Electrochemical degradation 1. Introduction

150

O2 /O3 MICROATMOSPHERES IN THE SURFACE OF GANYMEDE R. E. JOHNSON AND W. A. JESSER  

E-Print Network [OSTI]

O2 /O3 MICROATMOSPHERES IN THE SURFACE OF GANYMEDE R. E. JOHNSON AND W. A. JESSER Engineering with the surfaces of the icy satellites (Johnson 1990). A manifestation of this interaction is the sputtered O2 atmosphere at Europa, pre- dicted in 1982 based on laboratory data (Johnson, Lanzerotti, & Brown 1982

Johnson, Robert E.

151

Adsorption of water and ammonia on TiO2-anatase cluster models Isik Onal a,*, Sezen Soyer a  

E-Print Network [OSTI]

to the surface properties and the adsorption reactions of titanium dioxide-anatase surface. Lin and Bai [3 reserved. Keywords: TiO2; Anatase; Adsorption; Water; Ammonia; DFT 1. Introduction Titanium oxides are usedAdsorption of water and ammonia on TiO2-anatase cluster models Isik Onal a,*, Sezen Soyer a , Selim

Senkan, Selim M.

152

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

E-Print Network [OSTI]

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

Alavi, Ali

153

Predicting New TiO2 Phases with Low Band Gaps by a Multiobjective Global Optimization Approach  

E-Print Network [OSTI]

stable. This is equivalent to a global optimization problem of a biobjective function, i.e., total energyPredicting New TiO2 Phases with Low Band Gaps by a Multiobjective Global Optimization Approach Hou as a novel global optimization algorithm to predict new polymorphs of bulk TiO2 with better optical

Gong, Xingao

154

Modeling of implantation and mixing damage during etching of SiO2 over Si in fluorocarbon plasmas  

E-Print Network [OSTI]

Modeling of implantation and mixing damage during etching of SiO2 over Si in fluorocarbon plasmas- sions (CD).3 An example of this process is fluorocarbon plasma etching of trenches and vias in SiO2 and stopping on a crystalline Si layer. The fluorocarbon radicals produced in the plasma deposit a polymer

Kushner, Mark

155

Journal of Power Sources 165 (2007) 509516 Direct NaBH4/H2O2 fuel cells  

E-Print Network [OSTI]

Published by Elsevier B.V. Keywords: Fuel cell; Hydrogen peroxide; Regenerative fuel cell; Sodium) /hydrogen per- oxide (H2O2) fuel cell (FC) is under development jointly by the University of IllinoisJournal of Power Sources 165 (2007) 509­516 Direct NaBH4/H2O2 fuel cells George H. Mileya,e,, Nie

Carroll, David L.

156

Maintaining Low Oxygen (O2) in Coal Fueled Utility Boilers Using CO Instrumentation  

E-Print Network [OSTI]

determination im practical. 2) The degree of stratification is increased by the reduction of excess O ? 2 3) The degree of stratification changes as some function of load. This is inferred by increased CO generation as load increases. (See Figure 3 below.... ) 1.3 12 0),-.. ~~ O~ ~~ 0 el ~ g 0.7 ..c: !C :.: 0.4 0 ..3 0.1 c c c D C COCa o Ca 0 C a aO ~ B a 8 aDO 0 ao D C O-+-----.-::.--=----=:.,----+---....---~--____1 -.5:) -10 10 Boiler Tilt Angle Degrees Fig. 4 CARBON MONOXIDE VS...

Hopkins, D.; Downing, T.

157

DFT+U Study of CeO2 and Its Native Defects  

E-Print Network [OSTI]

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...

Huang, Bolong; Gillen, Roland; Robertson, John

2014-10-14T23:59:59.000Z

158

Development of high-temperature ferromagnetism in SnO2 and paramagnetism in  

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: Vegetation Proposed Newcatalyst phasesData FilesShape, Density,TiO2(110).Development ofMotorstoTheSnO by

159

Nonthermal Water Splitting on Rutile TiO2: Electron-Stimulated Production  

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 the Contributions andDataNationalNewportBig Eddyof H-2 and O-2 in Amorphous Solid Water

160

Photooxidation of Acetone on TiO2(110): Conversion to Acetate via Methyl  

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 TheStevenAdministrationPhotometric Variations4TiO2(110).

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Electron- and hole-mediated reactions in UV -irradiated O2 adsorbed on  

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: Vegetation ProposedUsing Zirconia Nanoparticles as Selective Sorbents .Isotopesreduced rutile TiO2(110).

162

Modeling of durability of polyelectrolyte membrane of O2/H2 fuel cell  

E-Print Network [OSTI]

In this paper, we discuss critical aspects of the mechanisms and features of polymer proton exchange membrane (PEM) degradation in low-temperature H2/O2 fuel cell. In this paper, we focused on chemical mechanism of OH radical generation and their distribution in operational fuel cell. According to the current concept, free radicals are generated from hydrogen and oxygen crossover gases at the surface of Pt particles that precipitated in the membrane. We explicitly calculate Pt precipitation rate and electrochemical potential distribution in the membrane that controls it. Based on radical generation rate and Pt distribution we calculate degradation rate of the membrane taking advantage of simple kinetics equations.

Atrazhev, Vadim V

2014-01-01T23:59:59.000Z

163

In Situ Observation of the Electrochemical Lithiation of a Single SnO2 Nanowire Electrode  

SciTech Connect (OSTI)

We report the first real-time transmission electron microscopy (TEM) observations of the structural evolution and phase transformation of lithium-ion battery anode during the battery charging process. A nanobattery consisting of a single SnO2 nanowire anode and an ionic liquid electrolyte was successfully constructed in a TEM. We observed that during the charging process, the SnO2 crystal was converted to Li2O glass with LixSn nanocrystalline precipitates as the reaction front propagated progressively along the nanowire. After the reaction front passed, the nanowire showed swelling, elongation, and large off-axis distortion (spiraling). Upon completion of the electrochemical charging, the nanowire showed up to 120% elongation and a 30% increase in diameter with a volume expansion of about 272%. The charging front, which separates the reacted and unreacted sections of the nanowire, contains a high density of mobile dislocations, which are continuously nucleated and annihilated at the moving reaction front. This dislocation cloud indicates large in-plane misfit stresses, and serves as structural precursor to the eventual complete solid-state amorphization. The rate of charging in our nanobatteries is found to be proportional to the inverse square root of nanowire length, indicating that a standalone nanobattery or integrated arrays of nanobatteries should have kinetic advantage over conventional battery design. The present observations also provide important mechanistic insights for the design of advanced batteries with improved performance and lifetime for broad electrical energy storage applications.

Huang, J. Y.; Zhong, Li; Wang, Chong M.; Sullivan, John P.; Xu, Wu; Zhang, Li Q.; Mao, Scott; Hudak, N.; Liu, Xiao H.; Subramanian, Arun Kumar; Fan, Hongyou; Qi, Liang; Kushima, Akihiro; Li, Ju

2010-11-18T23:59:59.000Z

164

Measurements of the Cerenkov light emitted by a TeO2 crystal  

E-Print Network [OSTI]

Bolometers have proven to be good instruments to search for rare processes because of their excellent energy resolution and their extremely low intrinsic background. In this kind of detectors, the capability of discriminating alpha particles from electrons represents an important aspect for the background reduction. One possibility for obtaining such a discrimination is provided by the detection of the Cerenkov light which, at the low energies of the natural radioactivity, is only emitted by electrons. In this paper, the results of the analysis of the light emitted by a TeO2 crystal at room temperature when transversed by a cosmic ray are reported. Light is promptly emitted after the particle crossing and a clear evidence of its directionality is also found. These results represent a strong indication that Cerenkov light is the main, if not even the only, component of the light signal in a TeO2 crystal. They open the possibility to make large improvements in the performance of experiments based on this kind of materials

F. Bellini; N. Casali; I. Dafinei; M. Marafini; S. Morganti; F. Orio; D. Pinci; M. Vignati; C. Voena

2012-12-12T23:59:59.000Z

165

On the consistency of QCBED structure factor measurements for TiO2 (Rutile)  

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

The same Bragg reflection in TiO2 from twelve different CBED patterns (from different crystals, orientations and thicknesses) are analysed quantitatively in order to evaluate the consistency of the QCBED method for bond-charge mapping. The standard deviation in the resulting distribution of derived X-ray structure factors is found to be an order of magnitude smaller than that in conventional X-ray work , and the standard error (0.026% for FX(110)) is slightly better than obtained by the X-ray Pendellosung method applied to silicon. This is sufficiently accuracy to distinguish between atomic, covalent and ionic models of bonding. We describe the importance of extracting experimental parameters from CCD camera characterization, and of surface oxidation and crystal shape. The current experiments show that the QCBED method is now a robust and powerful tool for low order structure factor measurement, which does not suffer from the large extinction (multiple scattering) errors which occur in inorganic X-ray crystallography, and may be applied to nanocrystals. Our results will be used to understand the role of d electrons in the chemical bonding of TiO2.

Spence, J.C.H [Arizona State University; Friis, J. [Norwegian University of Science and Technology; Zuo, J.M [University of Illinois, Urbana, IL; Jiang, B.

2003-10-01T23:59:59.000Z

166

New Insights into Reaction Mechanisms of Ethanol Steam Reforming on Co-ZrO2  

SciTech Connect (OSTI)

The reaction pathway of ethanol steam reforming on Co-ZrO2 has been identified and the active sites associated with each step are proposed. Ethanol is converted to acetaldehyde and then to acetone, followed by acetone steam reforming. More than 90% carbon was found to follow this reaction pathway. N2-Sorption, X-ray Diffraction (XRD), Temperature Programmed Reduction (TPR), in situ X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy, as well as theoretical Density Functional Theory (DFT) calculations have been employed to identify the structure and functionality of the catalysts, which was further used to correlate their performance in ESR. It was found that metallic cobalt is mainly responsible for the acetone steam reforming reactions; while, CoO and basic sites on the support play a key role in converting ethanol to acetone via dehydrogenation and condensation/ketonization reaction pathways. The current work provides fundamental understanding of the ethanol steam reforming reaction mechanisms on Co-ZrO2 catalysts and sheds light on the rational design of selective and durable ethanol steam reforming catalysts.

Sun, Junming; Karim, Ayman M.; Mei, Donghai; Engelhard, Mark H.; Bao, Xinhe; Wang, Yong

2015-01-01T23:59:59.000Z

167

Principles of water oxidation and O2-based hydrocarbon transformation by multinuclear catalytic sites  

SciTech Connect (OSTI)

Abstract The central thrust of this integrated experimental and computational research program was to obtain an atomistic-level understanding of the structural and dynamic factors underlying the design of catalysts for water oxidation and selective reductant-free O2-based transformations. The focus was on oxidatively robust polyoxometalate (POM) complexes in which a catalytic active site interacts with proximal metal centers in a synergistic manner. Thirty five publications in high-impact journals arose from this grant. I. Developing an oxidatively and hydrolytically stable and fast water oxidation catalyst (WOC), a central need in the production of green fuels using water as a reductant, has proven particularly challenging. During this grant period we have designed and investigated several carbon-free, molecular (homogenous), oxidatively and hydrolytically stable WOCs, including the Rb8K2[{Ru4O4(OH)2(H2O)4}(?-SiW10O36)2]·25H2O (1) and [Co4(H2O)2(?-PW9O34)2]10- (2). Although complex 1 is fast, oxidatively and hydrolytically stable WOC, Ru is neither abundant nor inexpensive. Therefore, development of a stable and fast carbon-free homogenous WOC, based on earth-abundant elements became our highest priority. In 2010, we reported the first such catalyst, complex 2. This complex is substantially faster than 1 and stable under homogeneous conditions. Recently, we have extended our efforts and reported a V2-analog of the complex 2, i.e. [Co4(H2O)2(?-VW9O34)2]10- (3), which shows an even greater stability and reactivity. We succeeded in: (a) immobilizing catalysts 1 and 2 on the surface of various electrodes, and (b) elucidating the mechanism of O2 formation and release from complex 1, as well as the Mn4O4L6 “cubane” cluster. We have shown that the direct O-O bond formation is the most likely pathway for O2 formation during water oxidation catalyzed by 1. II. Oxo transfer catalysts that contain two proximal and synergistically interacting redox active metal centers in the active site form another part of considerable interest of our grant because species with such sites [including methane monooxygenase (MMO) and more] are some of the most effective oxygenase catalysts known. Our team conducted the following research on ?-M2-Keggin complexes: (a) investigated stability of the trimer [{Fe3(OH)3(H2O)2}3(?-SiW10O36)3]15-, 4, in water, and developed the chemistry and catalysis of the di-iron centered POM, [?(1,2)-SiW10{Fe(OH)}2O38]6-, 5, in organic solvents (Figure 2). We also study the thermodynamic and structural stability of ?-M2-Keggin in aqueous media for different M’s (d-electron metals). We have defined two structural classes of POMs with proximally bound d-electron metal centers. We refer to these structural isomers of the {?-M2SiW10} family of POMs as “in-pocket” and “out-of pocket”. We have elucidated the factors controlling the structure and stability of the V, Fe, Ru, Tc, Mo and Rh derivatives of [(SiO4)M2(OH)2W10O32]4- using a range of computational tools. We have: (a) demonstrated that heteroatom X in these polyanions may function as an “internal switch” for defining the ground electronic states and, consequently, the reactivity of the ?-M2-Keggin POM complexes; (b) elucidated reactivity of divacant lacunary species and polyperoxotungstates (PPTs), {Xn+O4[WO(O2)2]4}n-, which could be degradation products of ?-M2-Keggin complexes in aqueous media; (c) elucidated the role of the POM ligand in stabilization of {Ru2} and {(Ru-oxo)2} fragments in the reactant and product of the reaction of {?-[(Xn+O4)Ru2(OH)2W10O32]}(8-n)- (where X = Si4+, P5+ and S6+) with O2, and (d) the mechanisms of olefin epoxidation catalyzed by these di-d-transition metal substituted and divacant lacunary ?-M2-Keggin complexes. III. Complementing the efforts presented above was the development of less time-consuming but reasonably accurate computational methods allowing one to explore more deeply large catalytic systems. We developed Reactive Force Field (ReaxFF) to study interaction of the targeted POMs with water, pro

Musaev, Djamaladdin G [Chemistry, Emory University; Hill, Craig L [Chemistry, Emory University; Morokuma, Keiji [Chemistry, Emory University

2014-10-28T23:59:59.000Z

168

Band Offsets at the Epitaxial Anatase TiO2/n-SrTiO3(001) Interface...  

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

to measure valence band offsets at the epitaxial anatase TiO2(002)n-SrTiO3(001) heterojunction prepared by molecular beam epitaxy, Within experimental error, the valance band...

169

Aging to equilibrium dynamics of SiO2 K. Vollmayr-Lee* and J. A. Roman  

E-Print Network [OSTI]

Aging to equilibrium dynamics of SiO2 K. Vollmayr-Lee* and J. A. Roman Department of Physics complete summary of pre- vious results, we refer the reader to the references 10,11 and references therein

Ligare, Martin

170

In Situ Generation of Few-Layer Graphene Coatings on SnO2-SiC...  

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

In Situ Generation of Few-Layer Graphene Coatings on SnO2-SiC Core-Shell Nanoparticles for High-Performance Lithium-Ion Storage. In Situ Generation of Few-Layer Graphene Coatings...

171

Continuous-wave laser oscillation on the 1315 nm transition of atomic iodine pumped by O2,,a1  

E-Print Network [OSTI]

oxygen generator. There are many system issues having to do with weight, safety, and the ability.1063/1.1883317 The classic chemical oxygen-iodine laser COIL system1 operates on the I 2 P1/2 I 2 P3/2 electronic transi transfer between the metastable excited singlet oxygen molecule, O2 a1 de- noted as O2 1 hereafter

Carroll, David L.

172

Antireflection and SiO2 Surface Passivation by Liquid-Phase Chemistry for Efficient Black Silicon Solar Cells: Preprint  

SciTech Connect (OSTI)

We report solar cells with both black Si antireflection and SiO2 surface passivation provided by inexpensive liquid-phase chemistry, rather than by conventional vacuum-based techniques. Preliminary cell efficiency has reached 16.4%. Nanoporous black Si antireflection on crystalline Si by aqueous etching promises low surface reflection for high photon utilization, together with lower manufacturing cost compared to vacuum-based antireflection coating. Ag-nanoparticle-assisted black Si etching and post-etching chemical treatment recently developed at NREL enables excellent control over the pore diameter and pore separation. Performance of black Si solar cells, including open-circuit voltage, short-circuit current density, and blue response, has benefited from these improvements. Prior to this study, our black Si solar cells were all passivated by thermal SiO2 produced in tube furnaces. Although this passivation is effective, it is not yet ideal for ultra-low-cost manufacturing. In this study, we report, for the first time, the integration of black Si with a proprietary liquid-phase deposition (LPD) passivation from Natcore Technology. The Natcore LPD forms a layer of <10-nm SiO2 on top of the black Si surface in a relatively mild chemical bath at room temperature. We demonstrate black Si solar cells with LPD SiO2 with a spectrum-weighted average reflection lower than 5%, similar to the more costly thermally grown SiO2 approach. However, LPD SiO2 provides somewhat better surface-passivation quality according to the lifetime analysis by the photo-conductivity decay measurement. Moreover, black Si solar cells with LPD SiO2 passivation exhibit higher spectral response at short wavelength compared to those passivated by thermally grown SiO2. With further optimization, the combination of aqueous black Si etching and LPD could provide a pathway for low-cost, high-efficiency crystalline Si solar cells.

Yuan, H. C.; Oh, J.; Zhang, Y.; Kuznetsov, O. A.; Flood, D. J.; Branz, H. M.

2012-06-01T23:59:59.000Z

173

Adsorption of L-aspartate to rutile (a-TiO2): Experimental and theoretical surface complexation studies  

E-Print Network [OSTI]

Adsorption of L-aspartate to rutile (a-TiO2): Experimental and theoretical surface complexation the adsorption of L-aspartate on the surface of rutile (a-TiO2, pHPPZC = 5.4) in NaCl(aq) over a wide range of pH, ligand-to-solid ratio and ionic strength, using potentiometric titrations and batch adsorption

Sverjensky, Dimitri A.

174

Rapid SiO2 Atomic Layer Deposition Using Tris(tert-pentoxy)silanol B. B. Burton,  

E-Print Network [OSTI]

temperatures and higher TPS pressures. SiO2 ALD thicknesses of 125-140 � were observed at the highest TPS requires high temperatures of >325 °C and large reactant exposure of >109 L (1 L ) 10-6 Torr s).4-7 However ALD films using liquid tris(tert-pentoxy)silanol (TPS). The SiO2 film thicknesses were determined

George, Steven M.

175

Changes in O2 and CO surface chemistry with increasing carbon concentration on W(100)  

SciTech Connect (OSTI)

It is pointed out that tungsten carbide (WC) is of interest as an important industrial catalyst. According to a proposed model, the WC surface consists of a layer of carbon atoms beneath the first layer of tungsten atoms. Stefan et al. (1985) have conducted photoemission electron spectroscopy (PES) experiments which show significant similarities in the surface chemistry and electronic structure of WC and the model surface. In the present investigation, PES is employed as a tool to study the changes in O2 and CO surface chemistry on W(100) with carbon concentration increasing from zero to that of the model surface. It was found that 1/2 monolayer of carbon was sufficient to produce a reduction in the tungsten surface peak. Attention is given to carburization of W(100), oxygen adsorption, and CO adsorption. 14 references.

Jupiter, P.J.; Viescas, A.J.; Carbone, C.; Lindau, I.; Spicer, W.E.

1985-06-01T23:59:59.000Z

176

Magnetic Interactions in the Geometrically Frustrated Triangular Lattice Antiferromagnet CuFeO2  

SciTech Connect (OSTI)

The spin-wave excitations of the geometrically frustrated triangular lattice antiferromagnet CuFeO2 have been measured using high resolution inelastic neutron scattering. Antiferromagnetic interactions up to third nearest neighbors in the ab plane (J1, J2, J3, with J2=J1 0:44 and J3=J1 0:57), as well as out-of-plane coupling (Jz, with Jz=J1 0:29) are required to describe the spin-wave dispersion relations, indicating a three-dimensional character of the magnetic interactions. Two energy dips in the spin-wave dispersion occur at the incommensurate wave vectors associated with multiferroic phase and can be interpreted as dynamic precursors to the magnetoelectric behavior in this system.

Ye, Feng [ORNL; Fernandez-Baca, Jaime A [ORNL; Fishman, Randy Scott [ORNL; Ren, Y. [Argonne National Laboratory (ANL); Qiu, Y. [National Institute of Standards and Technology (NIST); Kimura, T. [Osaka University

2007-01-01T23:59:59.000Z

177

Magnetic Interaction in the Geometrically Frustrated Triangular LatticeAntiferromagnet CuFeO2  

SciTech Connect (OSTI)

The spin wave excitations of the geometrically frustrated triangular lattice antiferromagnet (TLA) CuFeO2 have been measured using high resolution inelastic neutron scattering. Antiferromagnetic interactions up to third nearest neighbors in the ab plane (J1, J2, J3, with J2=J1 0:44 and J3=J1 0:57), as well as out-of-plane coupling (Jz, with Jz=J1 0:29) are required to describe the spin wave dispersion relations, indicating a three dimensional character of the magnetic interactions. Two energy deeps in the spin wave dispersion occur at the incommensurate wavevectors associated with multiferroic phase, and can be interpreted as dynamic precursors to the magnetoelectric behavior in this system.

Ye, Feng [ORNL; Fernandez-Baca, Jaime A [ORNL; Fishman, Randy Scott [ORNL; Ren, Y. [Argonne National Laboratory (ANL); Kang, H. J. [National Institute of Standards and Technology (NIST); Qiu, Y. [National Institute of Standards and Technology (NIST); Kimura, T. [Los Alamos National Laboratory (LANL)

2007-01-01T23:59:59.000Z

178

Investigation of oxygen point defects in cubic ZrO2 by density functional theory  

SciTech Connect (OSTI)

The energetics of formation and migration of the oxygen vacancy and interstitial in cubic ZrO2 are investigated by density functional theory calculations. In an O-rich environment, the negatively charged oxygen interstitial is the most dominant defect whereas, the positively charged oxygen vacancy is the most dominant defect under O-poor conditions. Oxygen interstitial migration occurs by the interstitialcy and the direct interstitial mechanisms, with calculated migration energy barriers of 2.94 eV and 2.15 eV, respectively. For the oxygen vacancy, diffusion is preferred along the <100> direction, and the calculated energy barriers are 0.26 eV for , 0.27 eV for and 0.54 eV for . These results indicate that oxygen diffusivity is higher through the vacancy-migration mechanism.

Liu, Bin [ORNL] [ORNL; Xiao, Haiyan [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Zhang, Yanwen [ORNL] [ORNL; Aidhy, Dilpuneet S [ORNL] [ORNL; Weber, William J [ORNL] [ORNL

2014-01-01T23:59:59.000Z

179

Atmospheric Oxygen Binding and Hole Doping in Deformed Graphene on a SiO2 Substrate  

E-Print Network [OSTI]

Using micro-Raman spectroscopy and scanning tunneling microscopy, we study the relationship between structural distortion and electrical hole doping of graphene on a silicon dioxide substrate. The observed upshift of the Raman G band represents charge doping and not compressive strain. Two independent factors control the doping: (1) the degree of graphene coupling to the substrate, and (2) exposure to oxygen and moisture. Thermal annealing induces a pronounced structural distortion due to close coupling to SiO2 and activates the ability of diatomic oxygen to accept charge from graphene. Gas flow experiments show that dry oxygen reversibly dopes graphene; doping becomes stronger and more irreversible in the presence of moisture and over long periods of time. We propose that oxygen molecular anions are stabilized by water solvation and electrostatic binding to the silicon dioxide surface.

Sunmin Ryu; Li Liu; Stephane Berciaud; Young-Jun Yu; Haitao Liu; Philip Kim; George W. Flynn; Louis E. Brus

2010-11-13T23:59:59.000Z

180

Describing excited state relaxation and localization in TiO2 nanoparticles using TD-DFT  

SciTech Connect (OSTI)

We have investigated the description of excited state relaxation in naked and hydrated TiO2 nanoparticles using Time-Dependent Density Functional Theory (TD-DFT) with three common hybrid exchange-correlation (XC) potentials; B3LYP, CAM-B3LYP and BHLYP. Use of TD-CAM-B3LYP and TD-BHLYP yields qualitatively similar results for all structures, which are also consistent with predictions of coupled cluster theory for small particles. TD-B3LYP, in contrast, is found to make rather different predictions; including apparent conical intersections for certain particles that are not observed with TD-CAM-B3LYP nor with TD-BHLYP. In line with our previous observations for vertical excitations, the issue with TD-B3LYP appears to be the inherent tendency of TD-B3LYP, and other XC potentials with no or a low percentage of Hartree-Fock Like Exchange, to spuriously stabilize the energy of charge-transfer (CT) states. Even in the case of hydrated particles, for which vertical excitations are generally well described with all XC potentials, the use of TD-B3LYP appears to result in CT-problems for certain particles. We hypothesize that the spurious stabilization of CT-states by TD-B3LYP even may drive the excited state optimizations to different excited state geometries than those obtained using TD-CAM-B3LYP or TD-BHLYP. Finally, focusing on the TD-CAM-B3LYP and TD-BHLYP results, excited state relaxation in naked and hydrated TiO2 nanoparticles is predicted to be associated with a large Stokes’ shift.

Berardo, Enrico; Hu, Hanshi; van Dam, Hubertus JJ; Shevlin, S. A.; Woodley, Scott M.; Kowalski, Karol; Zwijnenburg, Martijn A.

2014-10-30T23:59:59.000Z

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Identification of Defect Sites on SiO2 Thin Films Grown on Y. D. Kim, T. Wei, and D. W. Goodman*  

E-Print Network [OSTI]

Identification of Defect Sites on SiO2 Thin Films Grown on Mo(112) Y. D. Kim, T. Wei, and D. W properties of SiO2 thin films with a thickness of 0.7-0.8 nm are identical to those of bulk SiO2 properties of the corre- sponding bulk single crystals.1-4 In recent studies SiO2 single-crystalline thin

Goodman, Wayne

182

An investigation of the TiOxSiO2/Mo(112) interface M.S. Chen, D.W. Goodman *  

E-Print Network [OSTI]

Ox-covered SiO2(monolayer)/Mo(112) surface, SiO2 diffuses to the surface and is bonded via Si­O­Ti linkages. SiO2 in this bond- ing configuration decomposes and desorbs more easily than from a Mo(112) surface energy loss spectroscopy (HREELS); Titanium oxides; Silica film; Mixed oxides; Surface structure

Goodman, Wayne

183

Small Au and Pt Clusters at the Anatase TiO2(101) Surface: Behavior at Terraces, Steps, and Surface Oxygen Vacancies  

E-Print Network [OSTI]

polymorph of titanium dioxide (TiO2). TiO2 is a versatile oxide material with important applications in many@ecust.edu.cn; diebold@tulane.edu Abstract: The adsorption properties of Au and Pt metal nanoclusters on TiO2 anatase edges. A preference for adsorption at type D-(112) steps is observed, which is probably a result

Diebold, Ulrike

184

Experimental and Computational Evidence of MetalO2 Activation and Rate-Limiting Proton-Coupled Electron Transfer in a Copper  

E-Print Network [OSTI]

-Coupled Electron Transfer in a Copper Amine Oxidase Yi Liu, Arnab Mukherjee, Nadav Nahumi, Mehmet Ozbil,§ Doreen 33146, United States *S Supporting Information ABSTRACT: The mechanism of O2 reduction by copper amine of copper amine oxidases, O2 reduction to H2O2 is physiologically significant,17 serving diverse functions

Roth, Justine P.

185

Enhancing electrochemical intermediate solvation through electrolyte anion selection to increase nonaqueous Li-O$_2$ battery capacity  

E-Print Network [OSTI]

Among the 'beyond Li-ion' battery chemistries, nonaqueous Li-O$_2$ batteries have the highest theoretical specific energy and as a result have attracted significant research attention over the past decade. A critical scientific challenge facing nonaqueous Li-O$_2$ batteries is the electronically insulating nature of the primary discharge product, lithium peroxide, which passivates the battery cathode as it is formed, leading to low ultimate cell capacities. Recently, strategies to enhance solubility to circumvent this issue have been reported, but rely upon electrolyte formulations that further decrease the overall electrochemical stability of the system, thereby deleteriously affecting battery rechargeability. In this study, we report that a significant enhancement (greater than four-fold) in Li-O$_2$ cell capacity is possible by appropriately selecting the salt anion in the electrolyte solution. Using $^7$Li nuclear magnetic resonance and modeling, we confirm that this improvement is a result of enhanced Li...

Burke, Colin M; Khetan, Abhishek; Viswanathan, Venkatasubramanian; McCloskey, Bryan D

2015-01-01T23:59:59.000Z

186

Detailed arsenic concentration profiles at Si/SiO2 interfaces  

SciTech Connect (OSTI)

The pile-up of arsenic at the Si/SiO2 interface after As implantation and annealing was investigated by high resolution Z-contrast imaging, electron energy-loss spectroscopy EELS, grazing incidence x-ray fluorescence spectroscopy GI-XRF, secondary ion mass spectrometry, x-ray photoelectron spectroscopy, Rutherford backscattering spectrometry, as well as Hall mobility and four-point probe resistivity measurements. After properly taking into account their respective artifacts, the results of all methods are compatible with each other, with EELS and GI-XRF combined with etching providing similar spatial resolution on the nanometer scale for the dopant profile. The sheet concentration of the piled-up As at the interface was found to be 11015 cm 2 for an implanted dose of 11016 cm 2 with a maximum concentration of 10 at. %. The strain observed in the Z-contrast images also suggests a significant concentration of local distortions within 3 nm from the interface, which, however, do not seem to involve intrinsic point defects.

Pei, Lirong [ORNL; Duscher, G. [University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL); Steen, Christian [Chair of Electron Devices, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen,; Pichler, Peter [Fraunhofer-Institute, Freiburg, Germany; Ryssel, Heiner [Fraunhofer Institute of Integrated Systems and Device Technology, Schottkystrasse 10, 91058 Erlangen; Napolitani, Enrico [MATIS-CNR-INFM and Dipartimento di Fisica, Università di Padova, via Marzolo 8, 35141 Padova, Italy; De Salvador, Davide [MATIS-CNR-INFM and Dipartimento di Fisica, Università di Padova, via Marzolo 8, 35141 Padova, Italy; Piro, Alberto [MATIS-CNR-INFM and Dipartimento di Fisica e Astronomia, Universita di Catania, Via S. Sofia 64,; Terrasi, Antonio [MATIS-CNR-INFM and Dipartimento di Fisica e Astronomia, Universita di Catania, Via S. Sofia 64,

2008-01-01T23:59:59.000Z

187

Prediction of O2 Dissociation Kinetics on LaMnO3-Based Cathode Materials for Solid Oxide Fuel Cells  

SciTech Connect (OSTI)

First-principles and statistical-theory calculations were applied to examine the interactions between oxygen molecules and the (100) surfaces of LaMnO3 and La0.5Sr0.5MnO2.75, one of the most-used cathode materials in solid oxide fuel cells (SOFCs). To predict the rate constants for the interactions between O2 and LaMnO3 or La0.5Sr0.5MnO2.75, potential energy profiles were constructed using the nudged elastic band (NEB) method. Predicted rate constants for the dissociation of adsorbed oxygen species on LaMnO3 (lm) and La0.5Sr0.5MnO2.75 (lsm) can be expressed as kdiss,lm ) 2.35 × 1012 exp(-0.50 eV/RT) s-1 and kdiss,lsm ) 2.15 × 1012 exp(-0.23 eV/RT) s-1, respectively, in the temperature range of 873-1273 K at 1 atm. Because the activation energy for oxygen dissociation on La0.5Sr0.5MnO2.75 (0.23 eV) is much smaller than that on LaMnO3 (0.50 eV), oxygen vacancies greatly enhance O2 dissociation kinetics. The kinetic and mechanistic studies for the interactions at the molecular level are imperative to gaining a fundamental understanding of oxygen reduction kinetics on cathode materials and to providing important insight into the rational design of more catalytically active cathode materials for SOFCs.

Choi, Yongman; Lynch, Matthew E.; Lin, M. C.; Liu, Meilin

2009-04-30T23:59:59.000Z

188

Time Resolved in Situ XAFS Study of the Electrochemical Oxygen Intercalation in SrFeO2.5 Brownmillerite Structure: Comparison with the Homologous SrCoO2.5 System  

E-Print Network [OSTI]

temperature oxygen ionic conductors are key materials for the development of the next generation solid oxideTime Resolved in Situ XAFS Study of the Electrochemical Oxygen Intercalation in SrFeO2 to reversibly intercalate oxygen in an electrochemical reaction at room temperature to reach SrMO3 stoichiometry

Frenkel, Anatoly

189

Conversion of 1,3-Propylene Glycol on Rutile TiO2(110)  

SciTech Connect (OSTI)

The adsorption of 1,3-propylene glycol (1,3-PG) on partially reduced TiO2(110) and its conversion to products have been studied by a combination of molecular beam dosing and temperature programmed desorption (TPD). When the Ti surface sites are saturated by 1,3-PG, ~80% of the molecules undergo further reactions to yield products that are liberated during the TPD ramp. In contrast to ethylene glycol (EG) and 1,2- propylene glycol (1,2-PG) that yield only alkenes and water at very low coverages (< 0.05 ML), two additional products, HCHO and C2H4, along with propylene (CH3CHCH2) and water are observed for 1,3-PG. Identical TPD line shapes and desorption yields for HCHO and C2H4 suggest that these products result from C-C bond cleavage and are coupled. At higher 1,3-PG coverages (> 0.1 ML), propanal (CH3CH2CHO) and two additional products, 1-propanol (CH3CH2CH2OH) and acrolein (CH2CHCHO), are observed. The desorption of 1-propanol is found to be coupled with the desorption of acrolein, suggesting that these products are formed by the disproportionation of two 1,3-PG molecules. The coverage dependent TPD results further show that propylene formation dominates at low coverages (< 0.3 ML), while the decomposition and disproportionation channels increase rapidly at higher coverages and reach yields comparable to that of propylene at the 1,3-PG saturation coverage of 0.5 ML. The observed surface chemistry clearly shows how the molecular structure of glycols influences their reaction pathways on oxide surfaces.

Chen, Long; Li, Zhenjun; Smith, R. Scott; Kay, Bruce D.; Dohnalek, Zdenek

2014-10-09T23:59:59.000Z

190

Influence of particle size and water coverage on the thermodynamic properties of water confined on the surface of SnO2 cassiterite nanoparticles  

SciTech Connect (OSTI)

Inelastic neutron scattering (INS) data for SnO2 nanoparticles of three different sizes and varying hydration levels are presented. Data were recorded on five nanoparticle samples that had the following compositions: 2 nm SnO2*0.82H2O, 6 nm SnO2*0.055H2O, 6 nm SnO2*0.095H2O, 20 nm SnO2*0.072H2O, and 20 nm SnO2*0.092H2O. The isochoric heat capacity and vibrational entropy values at 298 K for the water confined on the surface of these nanoparticles were calculated from the vibrational density of states that were extracted from the INS data. This study has shown that the hydration level of the SnO2 nanoparticles influences the thermodynamic properties of the water layers and, most importantly, that there appears to be a critical size limit for SnO2 between 2 and 6 nm below which the particle size also affects these properties and above which it does not. These results have been compared with those for isostructural rutile-TiO2 nanoparticles [TiO2*0.22H2O and TiO2*0.37H2O], which indicated that water on the surface of TiO2 nanoparticles is more tightly bound and experiences a greater degree of restricted motion with respect to water on the surface of SnO2 nanoparticles. This is believed to be a consequence of the difference in chemical composition, and hence surface properties, of these metal oxide nanoparticles.

Spencer, Elinor [Virginia Polytechnic Institute and State University (Virginia Tech); Ross, Dr. Nancy [Virginia Polytechnic Institute and State University (Virginia Tech); Parker, Stewart F. [ISIS Facility, Rutherford Appleton Laboratory; Kolesnikov, Alexander I [ORNL; Woodfield, Brian [Brigham Young University; Woodfield, K [Brigham Young University; Rytting, M [Brigham Young University; Boerio-Goates, Juliana [Brigham Young University; Navrotsky, Alexandra [University of California, Davis

2011-01-01T23:59:59.000Z

191

Calcification capacity of porous pHEMATiO2 composite Chao Li Yu-Feng Zheng Xia Lou  

E-Print Network [OSTI]

polymers for applica- tions as orthopaedic and dental implants. In this study, novel titanium dioxide (TiO2. Infiltration of calcium phosphate, up to 1000 lm, was observed. The diffusion capacity of calcium ions bonding to hard tissue which in turn provides a favourable procedure to mimic the bone environment through

Zheng, Yufeng

192

TITANIUM MINERAL CONCENTRATES1 (Data in thousand metric tons of contained TiO2 unless otherwise noted)  

E-Print Network [OSTI]

and pigment industries. Global production of titanium mineral concentrates was expected to increase during half of 2015. In Western Australia, the heavy-mineral resource, data for at the Keysbrook project were172 TITANIUM MINERAL CONCENTRATES1 (Data in thousand metric tons of contained TiO2 unless otherwise

193

Assessment of kinetic modeling for lean H2/CH4/O2/diluent flames at high pressures  

E-Print Network [OSTI]

) and HO2 + H with the main branching reactions. Methane addition is shown to influence the pressure: Hydrogen; Methane; Syngas; Flame speed; Chemical mechanism 1. Introduction The H2/O2 reaction system CO, CO2, H2O, CH4 and other small hydrocarbons (synthetic gas or "syngas") from coal or biomass

Ju, Yiguang

194

Investigation of Local Environments in Nafion-SiO2 Composite Membranes used in Vanadium Redox Flow Batteries  

SciTech Connect (OSTI)

The proton conducting polymer composite membranes are of technological interest in many energy devices such as fuel cells and redox flow batteries. In particular, the polymer composite membranes such as SiO2 incorporated Nafion membranes are recently reported as highly promising for the redox flow batteries. However, there is conflicting reports regarding the performance of this Nafion-SiO2 composite membrane in the redox flow cell. This paper presents results of the analysis of the Nafion-SiO2 composite membrane used in a vanadium redox flow battery by nuclear magnetic resonance (NMR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier Transformed Infra Red (FTIR) spectroscopy, and ultraviolet visible spectroscopy. The XPS study reveals the chemical identity and environment of vanadium cations accumulated at the surface. On the other hand, the 19F and 29Si NMR measurement explores the nature of the interaction between the silica particles, Nafion side chains and diffused vanadium cations. The 29Si NMR shows that the silica particles interaction via hydrogen bonds to the sulfonic groups of Nafion and diffused vanadium cations. Based on these spectroscopic studies, the chemical environment of the silica particles inside the Nafion membrane and their interaction with diffusing vanadium cations during flow cell operations are discussed. This study discusses the origin of performance degradation of the Nafion-SiO2 composite membrane materials in vanadium redox flow batteries.

Vijayakumar, M.; Schwenzer, Birgit; Kim, Soowhan; Yang, Zhenguo; Thevuthasan, Suntharampillai; Liu, Jun; Graff, Gordon L.; Hu, Jian Z.

2012-04-01T23:59:59.000Z

195

Performance enhancement of TiO2-based dye-sensitized solar cells by carbon nanospheres in photoanode  

E-Print Network [OSTI]

The conversion efficiency of dye-sensitized solar cells (DSSCs) is optimized by modifying the optical design and improving absorbance within the cell. These objectives are obtained by creating different sized cavities in TiO2 photoanode. For this purpose, carbon nanospheres with diameters 100-600 nm are synthesized by hydrothermal method. A paste of TiO2 is mixed with various amounts of carbon nanospheres. During TiO2 photoanode sintering processes at 500C temperature, the carbon nanospheres are removed. This leads to random creation of cavities in the DSSCs photoanode. These cavities enhance light scattering and porosity which improve light absorbance by dye N719 and provide a larger surface area for dye loading. These consequences enhance performance of DSSCs. By mixing 3% Wt. carbon nanospheres in the TiO2 pastes, we were able to increase the short circuit current density and efficiency by 40% (from 12.59 to 17.73 mA/cm2) and 33% (from 5.72% to 7.59%), respectively.

Bayatloo, Elham; Polkoo, Sajad Saghaye

2013-01-01T23:59:59.000Z

196

Photovoltage Effects of Sintered IrO2 Nanoparticle Catalysts in Water-Splitting Dye-Sensitized Photoelectrochemical Cells  

E-Print Network [OSTI]

. INTRODUCTION Inspired by dye-sensitized solar cells, water-splitting dye- sensitized photoelectrochemical cells-splitting dye-sensitized photoelectrochemical cells (WS- DSPECs) utilize high surface area TiO2 electrodes (WS-DSPECs) are attractive as a possible technology for converting solar energy to fuel. Like dye-sensitized

197

Time-Domain ab Initio Study of Charge Relaxation and Recombination in Dye-Sensitized TiO2  

E-Print Network [OSTI]

with surface hopping in the Kohn-Sham basis. Representing the dye-sensitized semiconductor Gra¨tzel cellTime-Domain ab Initio Study of Charge Relaxation and Recombination in Dye-Sensitized TiO2 Walter R understanding of these processes is crucial for improving solar cell design and optimizing photovoltaic current

198

Ambipolar Diffusion of Photocarriers in Electrolyte-Filled, Nanoporous TiO2 N. Kopidakis and E. A. Schiff*  

E-Print Network [OSTI]

, 1999 We report transient photocurrent measurements on solar cell structures based on dye-sensitized and by O'Regan and Gra¨tzel's demonstration of a remarkably efficient photoelectrochemical solar cell based on dye-sensitized, nanoporous TiO2.5 In this paper, we present transient photocurrent measurements

Schiff, Eric A.

199

Charge Transport Limitations in Self-Assembled TiO2 Photoanodes for Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

Charge Transport Limitations in Self-Assembled TiO2 Photoanodes for Dye-Sensitized Solar Cells and Storage; Energy and Charge Transport The dye-sensitized solar cell (DSC) has attracted wide- spread. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom *S Supporting Information ABSTRACT: Solid-state dye-sensitized

Steiner, Ullrich

200

Charge Transport Properties in TiO2 Network with Different Particle Sizes for Dye Sensitized Solar Cells  

E-Print Network [OSTI]

the large improvement in performance of dye sensitized solar cells (DSCs) achieved in 1991, mesoporousCharge Transport Properties in TiO2 Network with Different Particle Sizes for Dye Sensitized Solar sensitized solar cells, nanoparticle size, impedance, charge transport properties INTRODUCTION Since

Cao, Guozhong

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Highly-Selective and Reversible O2 Binding in Cr3(1,3,5-benzenetricarboxylate)2  

E-Print Network [OSTI]

emissions from fossil fuel-fired power plants.3 Here, instead of separating CO2 from N2 more apparent, owing to the potential for using oxyfuel combustion as a means of eliminating CO2 include the greater partial pressure of O2 in air (0.21 bar) compared to CO2 in a typical flue gas (0

202

Optical emission spectroscopy and Langmuir probe diagnostics of CH3F/O2 inductively coupled plasmas  

E-Print Network [OSTI]

Optical emission spectroscopy and Langmuir probe diagnostics of CH3F/O2 inductively coupled plasmas Erdinc Karakas, Vincent M. Donnelly,a) and Demetre J. Economoub) Plasma Processing Laboratory, Department discharge, sustained in a compact plasma reactor, was investigated as a function of power (20­400 W

Economou, Demetre J.

203

Charge transfer in photovoltaics consisting of interpenetrating networks of conjugated polymer and TiO2 nanoparticles  

E-Print Network [OSTI]

Charge transfer in photovoltaics consisting of interpenetrating networks of conjugated polymer and interpenetrating polymer networks6 can substantially im- prove the photoconductivity, and thus quantum efficiency and layered titanium dioxide (TiO2) nanoparticles on charge transfer processes in conjugated polymer

Carter, Sue

204

Qualitative analysis of Zircaloy-4 cladding air degradation in O2-N2 mixtures at high temperature  

E-Print Network [OSTI]

. Thermogravimetry, optical microscopy, scanning electron microscopy and energy dispersive X-ray spectrometry1 Qualitative analysis of Zircaloy-4 cladding air degradation in O2-N2 mixtures at high temperature Email: M. Lasserre (marina.lasserre@irsn.fr) Keywords: Zircaloy-4; thermogravimetry; high temperature

Boyer, Edmond

205

Magnetic properties of epitaxial Co-doped anatase TiO2 thin films with excellent structural quality  

SciTech Connect (OSTI)

The heteroepitaxy of Co-doped anatase TiO2 on LaAlO3(001) has been refined with the goal of determining the relationship between structural quality and magnetic ordering. By significantly reducing the deposition rate and substrate temperature, well-ordered Co:TiO2 films with unprecedented crystalline quality were obtained by oxygen-plasma-assisted molecular beam epitaxy, as characterized by x-ray diffraction. These films exhibit uniform Co doping, with no evidence of Co segregation or secondary phases throughout the film depth or on the surface. Despite the improvement in crystalline quality and Co distribution, the films exhibit negligible ferromagnetism, with saturation moments of only ~0.1 ?B/Co. This loss of ferromagnetism is in stark contrast to faster-grown Co:TiO2 films, where a higher growth rate and substrate temperature typically result in lower crystalline quality, a highly non-uniform Co distribution, and average saturation moments of ~1.2 ?B/Co. The presence of ferromagnetism in faster-grown Co:TiO2 does not appear to arise from intrinsic point defects present in the bulk material, such as charge-compensating oxygen vacancies, but is instead attributed to the presence of extended structural defects.

Kaspar, Tiffany C.; Droubay, Timothy C.; McCready, David E.; Nachimuthu, Ponnusamy; Heald, Steve M.; Wang, Chong M.; Lea, Alan S.; Shutthanandan, V.; Chambers, Scott A.; Toney, Michael F.

2006-07-26T23:59:59.000Z

206

Rate Characteristics of Anatase TiO2 Nanotubes and Nanorods for Lithium Battery Anode Materials at Room  

E-Print Network [OSTI]

ratio.11 Repulsive Coulombic interactions be- tween lithium ions are expected to be responsibleRate Characteristics of Anatase TiO2 Nanotubes and Nanorods for Lithium Battery Anode Materials for lithium content to x = 0.7. Li surface storage on nanometer-sized particles can be energetically more

Cho, Jaephil

207

Visible-light active TiO2 for microwave assisted photocatalytic reactions using mercury electrodeless discharge lamps  

E-Print Network [OSTI]

activity was evaluated by the degradation of mono-chloroacetic acid in a microwave field using mercury with pure titania, the UV-Vis spectra of Ag+, Zr4+ and VO2+ doped titanium dioxide show significant absorption in visible region. The degradation efficiency of MCAA in a microwave field on these TiO2 layers

Cirkva, Vladimir

208

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

E-Print Network [OSTI]

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

Henkelman, Graeme

209

Ternary PtSnRhSnO2 nanoclusters: synthesis and electroactivity for ethanol oxidation fuel cell reaction  

E-Print Network [OSTI]

Ternary PtSnRh­SnO2 nanoclusters: synthesis and electroactivity for ethanol oxidation fuel cell. Ethanol becomes an attractive fuel in the fuel cell reactions compared with methanol and hydrogen, because­4 A major impediment to the commercialization of ethanol fuel cell stacks is the difficulty in designing

Frenkel, Anatoly

210

182 IEEE TRANSACTIONS ON NANOTECHNOLOGY, VOL. 12, NO. 2, MARCH 2013 Monitoring the Environmental Impact of TiO2  

E-Print Network [OSTI]

the potential environmental impact of these nanoparticles. The goal of this research was to de- velop a plant-based sensor network for characterizing, monitoring, and understanding the environmental impact of TiO2 impact of nanomaterials. Index Terms--Biosystems, environmental monitoring, nanobio- science

Parker, Lynne E.

211

JOURNAL OF MATERIALS SCIENCE LETTERS 17 (1998) 20832086 Effect of oxygen plasma treatment on SiO2 aerogel lms  

E-Print Network [OSTI]

aerogel ®lms H.-H. PARK, M.-H. JO, H.-R. KIM, S.-H. HYUN Department of Ceramic Engineering, Yonsei with a lower dielectric constant material as an intermetal dielectric (IMD). SiO2 aerogel is a promising aerogel ®lm with 70% porosity exhibited the static dielectric constant of 2 at 1 MHz, and a leakage

Jo, Moon-Ho

212

Cycle-Life Characterization of Automotive Lithium-Ion Batteries with LiNiO2 Cathode  

E-Print Network [OSTI]

Cycle-Life Characterization of Automotive Lithium-Ion Batteries with LiNiO2 Cathode Yancheng Zhang of lithium- ion batteries for electric vehicles EVs and hybrid EVs HEVs . Substantial research has been- face, which is critical to the cycle life and calendar life of lithium- ion batteries.1,2 Unfortunately

213

Densification, anisotropic deformation, and plastic flow of SiO2 during MeV heavy ion irradiation  

E-Print Network [OSTI]

use in optical fibers. Some of the studies showed that ion irradiation causes densificationDensification, anisotropic deformation, and plastic flow of SiO2 during MeV heavy ion irradiation E and implantation masks to 4.0 MeV Xe irradiation is studied. Trenches in silica deform dramatically after

Polman, Albert

214

Optimisation of Accurate Rutile TiO2 (110), (100), (101) and (001) Surface Models from Periodic DFT Calculations  

E-Print Network [OSTI]

For years, the titanium dioxide, TiO2, has been widely used as a white pigment and opacifier. Its recent of pseudopotentials was studied and it appears that four valence electrons for titanium atoms are sufficient. The aim and inorganic molecules adsorption [14-21], have been also studied and the surface chemistry on this phase has

Paris-Sud XI, Université de

215

Combined Investigation of Water Sorption on TiO2 Rutile (110) Single Crystal Face: XPS vs. Periodic DFT  

E-Print Network [OSTI]

Introduction During the last decade, the titanium dioxide TiO2 has been widely studied, as well and catalysis [1-5]. At the natural state, the titanium dioxide can be found under three crystallographic phases calculations were performed to investigate the water adsorption process to determine if molecular and

Paris-Sud XI, Université de

216

Temperature Independence of the Photoinduced Electron Injection in Dye-Sensitized TiO2 Rationalized by Ab Initio  

E-Print Network [OSTI]

electron transfer (ET) in dye-sensitized semiconductor solar cells [J. Am. Chem. Soc. 2005, 127, 18234; IsrTemperature Independence of the Photoinduced Electron Injection in Dye-Sensitized TiO2 Rationalized) between a chro- mophore and an inorganic semiconductor creates the initial charge separation in the dye-sensitized

217

Figure 1: Functionalization of TiO2 by anhydrous chemical vapor deposition of trifunctional siloxane adsorbates.  

E-Print Network [OSTI]

siloxanes form only 2 covalent bonds, in a `bridge' mode with adjacent Ti4+ ions on the TiO2 surface of binding enthalpies at the DFT B3LYP/(LACVP/6-31G**) level of theory indicating that the `bridge' binding optical, electrical, magnetic and mechanical properties of semiconductor materials. For example, dye

218

TITANIUM MINERAL CONCENTRATES1 (Data in thousand metric tons of contained TiO2 unless otherwise noted)  

E-Print Network [OSTI]

mine tailings at Green Cove Springs, FL, ceased. At the Stony Creek mining operation, development to have decreased significantly. While mining continued at Starke, FL, and Stony Creek, VA, reprocessing operations in Sorel, Quebec, Canada. In response to uncertain market conditions, mining and TiO2 slag

219

A calorimetric analysis of a polymer electrolyte fuel cell and the production of H2O2 at the cathode  

E-Print Network [OSTI]

fuel cell that is operated on hydrogen and oxygen at 50 °C and 1 bar. The cell had a SolviCore Catalyst31.08.2009 1 A calorimetric analysis of a polymer electrolyte fuel cell and the production of H2O2 1. INTRODUCTION The energy that is dissipated as heat in fuel cells is interesting for several

Kjelstrup, Signe

220

First-principles study of the stability and migration of Kr, I and Xe in ZrO2  

SciTech Connect (OSTI)

The stability and migration of Kr, I and Xe in bulk ZrO2 and on the ZrO2 (1 1 1) surface have been studied by standard density functional theory (DFT) and the DFT-D2 method that corrects for the van der Waals interaction. Both methods show that Kr and Xe prefer to incorporate in the bulk phase rather than adsorb on the surface, and Xe is very mobile in the bulk state. For Kr and Xe adsorption on the surface, van der Waals interaction dominates, causing the weak interaction between the adsorbate and substrate. Iodine is found to have comparable stability in both phases and forms I O bonds with strong covalency. It exhibits higher mobility on the surface than in the bulk ZrO2, and diffusion from bulk-like state to surface state is an exothermic process. The fission product behavior in ZrO2 is shown to be a complicated synergetic effect of fission product atomic size, electron negativity, occupation site and phase structure of the host.

Xiao, Haiyan [University of Tennessee, Knoxville (UTK); Weber, William J [ORNL; Zhang, Yanwen [ORNL

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

19.2% Efficient InP Heterojunction Solar Cell with Electron-Selective TiO2 Contact  

E-Print Network [OSTI]

19.2% Efficient InP Heterojunction Solar Cell with Electron-Selective TiO2 Contact Xingtian Yin of California, Berkeley, California 94720, United States Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States § Electronic Materials Research Laboratory

Javey, Ali

222

Probing the Vibrational Relaxation of N2 and O2 by Use of CARS Spectroscopy to Model NTE-Turbulence  

E-Print Network [OSTI]

-thermochemical equilibrium (NTE) exists downstream of strong shock fronts and encountered in the shear layers from hypersonic flight, and coupled with turbulence, it has significant effects on flow dynamics. NTE, characterized by high vibrational temperatures of N2 and O2...

Dean, Jacob

2009-06-09T23:59:59.000Z

223

Chemically grown TiO2 on glass with superior photocatalytic properties G. Kenanakis a,b,  

E-Print Network [OSTI]

suspensions or in small-scale purification systems, thus limiting their practical use due to difficulties of photocatalysis for various applications such as water treatment, air purification and fuel cells [1­5]. TiO2 techniques [8­10]. Since then, many large scale deposition techniques, such as doctor blade and spray coating

224

Role of hydrogen in Ge/HfO2/Al gate stacks subjected to negative bias temperature instability  

E-Print Network [OSTI]

Role of hydrogen in Ge/HfO2/Al gate stacks subjected to negative bias temperature instability N 2007; published online 17 January 2008 This work investigates the role of hydrogen and nitrogen in a Ge. Virtually unchanged interface state density as a function of NBTI indicates no atomic hydrogen release from

Misra, Durgamadhab "Durga"

225

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

SciTech Connect (OSTI)

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.

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

2005-01-01T23:59:59.000Z

226

CO Oxidation on Aun/TiO2 Catalysts Produced by Size-Selected Cluster Sungsik Lee, Chaoyang Fan, Tianpin Wu, and Scott L. Anderson*  

E-Print Network [OSTI]

. Indeed, Fu et al.2 recently showed that activity for the water gas shift reaction on Au/CeO2 and Pt/CeO2 TiO2 in an ultrahigh vacuum (UHV-base pressure 1 Ã? 10-10 mbar). The kinetic energy spread of the Aun-8% of oxygen vacancies. (The XPS vacancy estimate was calibrated by a separate water dissociation experiment

Anderson, Scott L.

227

Seoul National UniversitySeoul National University http://bp.snu.ac.kr1 The Effect of TiCl4-Treated TiO2  

E-Print Network [OSTI]

TiO2 Compact Layer on the Performance of Dye-Sensitized Solar Cell #12;Seoul National UniversitySeoul National University http://bp.snu.ac.kr Dye-Sensitized Solar Cell 2 Schematic Diagram of the Electron Flow by the TiO2 compact layer. Electrolyte Hydrolysis of TiCl4 Solution Dye-Coated TiO2 Back Electron Transfere

Park, Byungwoo

228

SiO2 aerogel film as a novel intermetal dielectric Moon-Ho Jo, Hyung-Ho Park,a)  

E-Print Network [OSTI]

SiO2 aerogel film as a novel intermetal dielectric Moon-Ho Jo, Hyung-Ho Park,a) Dong-Joon Kim, Sang, cross talk, and interconnection delay in the deep submicron device regime. SiO2 aerogel is one of the successful fabrication of a SiO2 aerogel film as well as its material properties and electrical properties

Jo, Moon-Ho

229

The effects of zirconia morphology on methanol synthesis from COand H2 over Cu/ZrO2 catalysts: Part I -- Steady-State Studies  

SciTech Connect (OSTI)

The effect of zirconia phase on the activity and selectivityof Cu/ZrO2 for the hydrogenation of CO has been investigated. Relativelypure t-ZrO2 and m-ZrO2 were prepared with high surface areas (~; 145m2/g). Copper was then deposited onto the surface of these materials byeither incipient-wetness impregnation or deposition-precipitation. For afixed Cu surface area, Cu/m-ZrO2 was tenfold more active for methanolsynthesis than Cu/t-ZrO2 from a feed of 3/1 H2/CO at 3.0 MPa andtemperatures between 473 and 523 K. Cu/m-ZrO2 also exhibited a higherselectivity to methanol. Increasing the Cu surface area on m-ZrO2resulted in further improvement in activity with minimal change inselectivity. Methanol productivity increased linearly for both Cu/t-ZrO2and Cu/m-ZrO2 with increasing Cu surface area. The difference in inherentactivity of each phase paralleled the stronger and larger CO adsorptioncapacity of the Cu/m-ZrO2 as quantified by CO-TPD. The higher COadsorption capacity of Cu/m-ZrO2 is attributed to the presence of a highconcentration of anionic vacancies on the surface of m-ZrO2. Suchvacancies expose cus-Zr4+ cations, which act as Lewis acid centers andenhance the Bronsted acidity of adjacent Zr-OH groups. The presence ofcus-Zr4+ sites and adjacent Bronsted acidic Zr-OH groups contributes tothe adsorption of CO as HCOO-Zr groups, which are the initial precursorsto methanol.

Rhodes, Michael J.; Bell, Alexis T.

2005-03-21T23:59:59.000Z

230

A near-infrared photoluminescence study of GaAs nanocrystals in SiO2 films formed by sequential ion implantation  

E-Print Network [OSTI]

A near-infrared photoluminescence study of GaAs nanocrystals in SiO2 films formed by sequential ion GaAs nanocrystals are formed in SiO2 films and several PL bands appear in the red and near-infrared spectral region. Defects and impurities in GaAs nanocrystals and SiO2 cause weak luminescence in the near-infrared

Atwater, Harry

231

The role of vacancies, impurities and crystal structure in the magnetic properties of TiO2  

E-Print Network [OSTI]

We present an ab initio study of pure and doped TiO2 in the rutile and anatase phases. The main purpose of this work is to determine the role played by different defects and different crystal structures in the appearance of magnetic order. The calculations were performed for varying impurity and vacancy concentrations in both TiO2 structures. For Co impurities the local magnetic moment remained almost independent of the concentration and distribution while for Cu this is not the case, there is magnetism for low concentrations that disappears for the higher ones. Impurity-impurity interactions in both structures favor linear ordering of them. Magnetism in un-doped samples appears for certain vacancy concentrations and structural strain.

Mariana Weissmann; Leonardo A. Errico

2007-04-20T23:59:59.000Z

232

Au/MxOy/TiO2 catalysts for CO oxidation: promotional effect of main-group, transition, and rare-earth metal oxide additives.  

SciTech Connect (OSTI)

Au/TiO2 catalysts are active for CO oxidation, but they suffer from high-temperature sintering of the gold particles, and few attempts have been made to promote or stabilize Au/TiO2. Our recent communication addressed these issues by loading gold onto Al2O3/TiO2 prepared via surface-sol-gel processing of Al(sec-OC4H9)3 on TiO2. In our current full paper, Au/Al2O3/TiO2 catalysts were prepared alternatively by thermal decomposition of Al(NO3)3 on TiO2 followed by loading gold, and the influences of the decomposition temperature and Al2O3 content were systematically surveyed. This facile method was subsequently extended to the preparation of a battery of metal oxide-modified Au/TiO2 catalysts virtually not reported. It was found that Au/TiO2 modified by CaO, NiO, ZnO, Ga2O3, Y2O3, ZrO2, La2O3, Pr2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Dy2O3, Ho2O3, Er2O3, or Yb2O3 could retain significant activity at ambient temperature even after aging in O2-He at 500 C, whereas unmodified Au/TiO2 lost its activity. Moreover, some 200 C-calcined promoted catalysts showed high activity even at about -100 C. The deactivation and regeneration of some of these new catalysts were studied. This work furnished novel catalysts for further fundamental and applied research.

Ma, Zhen [ORNL; Overbury, Steven {Steve} H [ORNL; Dai, Sheng [ORNL

2007-01-01T23:59:59.000Z

233

Efficient band alignment for ZnxCd1xSe QD-sensitized TiO2 solar cells  

E-Print Network [OSTI]

the signicant breakthrough in dye-sensitized solar cells (DSSCs) was rst reported by O'Regan and GrEfficient band alignment for ZnxCd1�xSe QD-sensitized TiO2 solar cells Lin Yang,ab Ru Zhou,a Jolin photoelectrodes for solar cells. In the fabricated QDs sensitized solar cells, QDs with the composition of x ¼ 0

Cao, Guozhong

234

Hot-electron-driven charge transfer processes on O2 Pt,,111... surface probed by ultrafast extreme-ultraviolet pulses  

E-Print Network [OSTI]

it with an ultrafast laser pulse, charge transfer induced changes in the platinum-oxygen bond were observedHot-electron-driven charge transfer processes on O2 Ã?Pt,,111... surface probed by ultrafast extreme-ultraviolet pulses C. Lei,1, * M. Bauer,2 K. Read,1 R. Tobey,1 Y. Liu,3 T. Popmintchev,1 M. M. Murnane,1 and H. C

Bauer, Michael

235

Chemiluminescence and Ignition Delay Time Measurements of C9H20 Oxidation in O2-Ar Behind Reflected Shock Waves  

E-Print Network [OSTI]

CHEMILUMINESCENCE AND IGNITION DELAY TIME MEASUREMENTS OF C9H20 OXIDATION IN O2-Ar BEHIND REFLECTED SHOCK WAVES A Thesis by BRANDON MICHAEL ROTAVERA Submitted to the Office of Graduate Studies of Texas A&M University... WAVES A Thesis by BRANDON MICHAEL ROTAVERA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Eric L...

Rotavera, Brandon

2011-02-22T23:59:59.000Z

236

A VUV photoionization measurement and ab-initio calculation of the ionization energy of gas phase SiO2  

SciTech Connect (OSTI)

In this work we report on the detection and vacuum-ultraviolet (VUV) photoionization of gas phase SiO2 generated in situ via laser ablation of silicon in a CO2 molecular beam. The resulting species are investigated by single photon ionization with tunable VUV synchrotron radiation and mass analyzed using reflectron mass spectrometry. Photoionization efficiency (PIE) curves are recorded for SiO and SiO2 and ionization energy estimates are revealed from such measurements. A state-to-state ionizationenergy of 12.60 (+-0.05) eV is recorded by fitting two prominent peaks in the PIE curve for the following process: 1SUM O-Si-O --> 2PRODg [O-Si-O]+. Electronic structure calculations aid in the interpretation of the photoionization process and allow for identification of the symmetric stretch of 2PRODg [O-Si-O]+ which is observed in the PIE spectrum to be 0.11 eV (890 cm-1) above the ground state of the cation and agrees with the 892 cm-1 symmetric stretch frequency calculated at the CCSD(T)/aug-cc-pVTZ level.

Kostko, Oleg; Ahmed, Musahid; Metz, Ricardo B.

2008-12-05T23:59:59.000Z

237

Equivalent Circuit Description of Non-compensated n-p Codoped TiO2 as Intermediate Band Solar Cells  

E-Print Network [OSTI]

The novel concept of non-compensated n-p codoping has made it possible to create tunable intermediate bands in the intrinsic band gap of TiO2, making the codoped TiO2 a promising material for developing intermediate band solar cells (IBSCs). Here we investigate the quantum efficiency of such IBSCs within two scenarios - with and without current extracted from the extended intermediate band. Using the ideal equivalent circuit model, we find that the maximum efficiency of 57% in the first scenario and 53% in the second are both much higher than the Shockley-Queisser limit from single gap solar cells. We also obtain various key quantities of the circuits, a useful step in realistic development of TiO2 based solar cells invoking device integration. These equivalent circuit results are also compared with the efficiencies obtained directly from consideration of electron transition between the energy bands, and both approaches reveal the intriguing existence of double peaks in the maximum quantum efficiency as a function of the relative location of IBs.

Tian-Li Feng; Guang-Wei Deng; Yi Xia; Feng-Cheng Wu; Ping Cui; Hai-Ping Lan; Zhen-Yu Zhang

2010-12-09T23:59:59.000Z

238

Equivalent Circuit Description of Non-compensated n-p Codoped TiO2 as Intermediate Band Solar Cells  

E-Print Network [OSTI]

The novel concept of non-compensated n-p codoping has made it possible to create tunable intermediate bands in the intrinsic band gap of TiO2, making the codoped TiO2 a promising material for developing intermediate band solar cells (IBSCs). Here we investigate the quantum efficiency of such IBSCs within two scenarios - with and without current extracted from the extended intermediate band. Using the ideal equivalent circuit model, we find that the maximum efficiency of 57% in the first scenario and 53% in the second are both much higher than the Shockley-Queisser limit from single gap solar cells. We also obtain various key quantities of the circuits, a useful step in realistic development of TiO2 based solar cells invoking device integration. These equivalent circuit results are also compared with the efficiencies obtained directly from consideration of electron transition between the energy bands, and both approaches reveal the intriguing existence of double peaks in the maximum quantum efficiency as a fun...

Feng, Tian-Li; Xia, Yi; Wu, Feng-Cheng; Cui, Ping; Lan, Hai-Ping; Zhang, Zhen-Yu

2010-01-01T23:59:59.000Z

239

A Highly Efficient Solar Cell Made from a Dye-Modified ZnO-Covered TiO2 Nanoporous Electrode  

E-Print Network [OSTI]

-circuit photovoltage. Introduction Overall power conversion efficiency1,2 reaching 10% for dye sensitized solar cellA Highly Efficient Solar Cell Made from a Dye-Modified ZnO-Covered TiO2 Nanoporous Electrode Zhong A photoelectrochemical solar cell based on porous ZnO-covered TiO2 film has been fabricated with ruthenium bipyridyl

Huang, Yanyi

240

Effect of the Presence of Iodide on the Electron Injection Dynamics of Dye-Sensitized TiO2-Based Solar Cells  

E-Print Network [OSTI]

dynamics of dye-sensitized TiO2-based solar cells have been investigated to determine the effectsEffect of the Presence of Iodide on the Electron Injection Dynamics of Dye-Sensitized TiO2-Based Solar Cells Amanda L. Smeigh, Jordan E. Katz, Bruce S. Brunschwig,*,,§ Nathan S. Lewis,*, and James K

McCusker, James K.

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

An Unconventional Route to High-Efficiency Dye-Sensitized Solar Cells via Embedding Graphitic Thin Films into TiO2 Nanoparticle  

E-Print Network [OSTI]

An Unconventional Route to High-Efficiency Dye-Sensitized Solar Cells via Embedding Graphitic Thin into the conventional dye- sensitized solar cells (DSSCs), resulting in a remarkably improved cell efficiency due to its followed by direct carbonization. For dye-sensitized TiO2 based solar cells containing carbon/TiO2 thin

Lin, Zhiqun

242

A Density Functional Theory Study of the Mechanism of Free Radical Generation in the System Vanadate/PCA/H2O2  

E-Print Network [OSTI]

with H2O2 releases HOO· free radicals and generates V(IV) species, which are capable of generating HOA Density Functional Theory Study of the Mechanism of Free Radical Generation in the System for HOO· generation. It is also found that species containing two pca ligands and an H2O2 molecule do

Bell, Alexis T.

243

Study of Interfacial Charge-Transfer Complex on TiO2 Particles in Aqueous Suspension by Second-Harmonic Generation  

E-Print Network [OSTI]

/mol. 1. Introduction Titanium dioxide (TiO2) is a wide band-gap semiconductor having two common crystal, the adsorption isotherm of catechol on the colloidal TiO2 suspension was obtained and gave an excellent fit to the Langmuir adsorption model. From this, we infer the free energy of the adsorption to be G° ) -6.8 kcal

Eisenthal, Kenneth B.

244

Structure and dynamics of liquid water on rutile TiO2(110) Li-Min Liu, Changjun Zhang, Geoff Thornton, and Angelos Michaelides  

E-Print Network [OSTI]

those between water and titanium dioxide TiO2 . Water-TiO2 interfaces are relevant to photocatalysis on which adsorption state the water molecules are in at the interface: dissociated or molecular? Many, density-functional theory DFT studies predict either molecular or dissociative adsorption on the perfect

Alavi, Ali

245

arXiv:cond-mat/0606426v115Jun2006 Large enhancement of the thermopower in NaxCoO2 at high Na doping  

E-Print Network [OSTI]

or Peltier con- ductivity). Whereas the thermopower S = / is the quantity usually reported, we have found. Crystals of NaxCoO2 grow as either bilayer or tri-layer structures (2 and 3 CoO2 layers per unit cell

Ong, N. P.

246

Investigations of surface reactions during C2F6 plasma etching of SiO2 with equipment and feature scale models  

E-Print Network [OSTI]

; accepted 22 December 2000 During fluorocarbon plasma etching of SiO2 , a polymer passivation layer these processes, a surface reaction mechanism for fluorocarbon plasma etching of SiO2 has been developed dilution. © 2001 American Vacuum Society. DOI: 10.1116/1.1349728 I. INTRODUCTION Fluorocarbon plasma

Kushner, Mark

247

Direct Determination of the Ionization Energies of PtC, PtO, and PtO2 with VUVRadiation  

SciTech Connect (OSTI)

Photoionization efficiency curves were measured for gas-phase PtC, PtO, and PtO2 using tunable vacuum ultraviolet (VUV) radiation at the Advanced Light Source. The molecules were prepared by laser ablation of a platinum tube, followed by reaction with CH4 or N2O and supersonic expansion. These measurements providethe first directly measured ionization energy for PtC, IE(PtC) = 9.45 +- 0.05 eV. The direct measurement also gives greatly improved ionization energies for the platinum oxides, IE(PtO) = 10.0 +- 0.1 eV and IE(PtO2) = 11.35 +- 0.05 eV. The ionization energy connects the dissociation energies of the neutral and cation, leading to greatly improved 0 K bond dissociation energies for the neutrals: D0(Pt-C) = 5.95 +- 0.07 eV, D0(Pt-O)= 4.30 +- 0.12 eV, and D0(OPt-O) = 4.41 +- 0.13 eV, as well as enthalpies of formation for the gas-phase molecules Delta H0 f,0(PtC(g)) = 701 +- 7 kJ/mol, Delta H0f,0(PtO(g)) = 396 +- 12 kJ/mol, and Delta H0f,0(PtO2(g)) = 218 +- 11 kJ/mol. Much of the error in previous Knudsen cell measurements of platinum oxide bond dissociation energies is due to the use of thermodynamic second law extrapolations. Third law values calculated using statistical mechanical thermodynamic functions are in much better agreement with values obtained from ionization energies and ion energetics. These experiments demonstrate that laser ablation production with direct VUV ionization measurements is a versatile tool to measure ionization energies and bond dissociation energies for catalytically interesting species such as metal oxides and carbides.

Citir, Murat; Metz, Ricardo B.; Belau, Leonid; Ahmed, Musahid

2008-07-21T23:59:59.000Z

248

PET exam A 424304 20-032013 Short answers 111. Ex = Ex (O2) + Ex(N2) + Ex (unmix)  

E-Print Network [OSTI]

,7 = 3018,0 kJ/mol L Ex mix gases = 6*R*T*ln (½) = -10,1 kJ/mol L losses = 998,0 + 2678,9 ­ 3018,0 + 10. outsideoutside outside outside glass window outside outside outside window inside A R FA R A R Eb R J R J R Eb 11) · (h - T·s) = (O2) ·(cp· T - T·cp·ln(T/T) + R·T·cp·ln(p/p) ) ---------- T effect ----- ---- p effect

Zevenhoven, Ron

249

Non-solvolytic synthesis of aqueous soluble TiO2 nanoparticles and real-time dynamic measurements of the nanoparticle formation  

E-Print Network [OSTI]

-Cryst Solids 1997, 220:202–209. 15. Qiao QQ, Mcleskey JT: Water-soluble polythiophene/nanocrystalline TiO2 solar cells. Appl Phys 2005, 86:153501–153505. 16. Bach U, Lupo D, Comte P, Moser JE, Weissortel F, Salbeck J, Spreitzer H, Gratzel M: Solid-state dye-sensitized... mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies. Nature 1998, 395:583–585. 17. Oregan B, Gratzel M: A low-cost, high-efficiency solar-cell based on dye- sensitized colloidal TiO2 films. Nature 1991, 353:737–740. 18. Morris GE...

Chen, Lan; Rahme, Kamil; Holmes, Justin D; Morris, Michael A; Slater, Nigel KH

2012-06-07T23:59:59.000Z

250

UBC Centre for Blood Research: Fermentation Suite Brom A5 (F4) PDF.xls: FermentationProfile Air O2 rpm N2 Base Acid  

E-Print Network [OSTI]

UBC Centre for Blood Research: Fermentation Suite Brom A5 (F4) PDF.xls: FermentationProfile Air O2 rpm N2 Base Acid NH4OH Acetic Acid 8.6 16.0 Configuration 1 SP 4 - - - SP - 2 SP 3 0.000 Temp (oC) dO2 Fermentation (Hrs) pH rpm Temp Do OD CK (mg/50-L) MeOH (ml) dO2 (%)Temp (C) 40 20 60 80 0 100 6 8 4 2 0 10 28

Strynadka, Natalie

251

Modeling Excited States in TiO2 Nanoparticles: On the Accuracy of a TD-DFT Based Description  

SciTech Connect (OSTI)

We have investigated the suitability of Time-Dependent Density Functional Theory (TD-DFT) to describe vertical low-energy excitations in naked and hydrated titanium dioxide nanoparticles through a comparison with results from Equation-of-Motion Coupled Cluster (EOM-CC) quantum chemistry methods. We demonstrate that for most TiO2 nanoparticles TD-DFT calculations with commonly used exchange-correlation (XC-)potentials (e.g. B3LYP) and EOM-CC methods give qualitatively similar results. Importantly, however, we also show that for an important subset of structures, TD-DFT gives qualitatively different results depending upon the XC-potential used and that in this case only TD-CAM-B3LYP and TD-BHLYP calculations yield results that are consistent with those obtained using EOM-CC theory. Moreover, we demonstrate that the discrepancies for such structures arise from a particular combination of defects, excitations involving which are charge-transfer excitations and hence are poorly described by XC-potentials that contain no or low fractions of Hartree-Fock like exchange. Finally, we discuss that such defects are readily healed in the presence of ubiquitously present water and that as a result the description of vertical low-energy excitations for hydrated TiO2 nanoparticles is hence non-problematic.

Berardo, Enrico; Hu, Hanshi; Shevlin, S. A.; Woodley, Scott M.; Kowalski, Karol; Zwijnenburg, Martijn A.

2014-03-11T23:59:59.000Z

252

TeO$_2$ bolometers with Cherenkov signal tagging: towards next-generation neutrinoless double beta decay experiments  

E-Print Network [OSTI]

CUORE, an array of 988 TeO$_2$ bolometers, is about to be one of the most sensitive experiments searching for neutrinoless double-beta decay. Its sensitivity could be further improved by removing the background from $\\alpha$ radioactivity. Few years ago it has been pointed out that the signal from $\\beta$s can be tagged by detecting the emitted Cherenkov light, which is not produced by $\\alpha$s. In this paper we confirm this possibility. For the first time we measured the Cherenkov light emitted by a CUORE crystal, and found it to be 100 eV at the $Q$-value of the decay. To completely reject the $\\alpha$ background, we compute that one needs light detectors with baseline noise below 20 eV RMS, a value which is 3-4 times smaller than the average noise of the bolometric light detectors we are using. We point out that an alternative light detector technology must be developed to obtain TeO$_2$ bolometric experiments able to probe the inverted hierarchy of neutrino masses.

Casali, N; Beeman, J W; Bellini, F; Cardani, L; Dafinei, I; Di Domizio, S; Ferroni, F; Gironi, L; Nagorny, S; Orio, F; Pattavina, L; Pessina, G; Piperno, G; Pirro, S; Rusconi, C; Tomei, C

2014-01-01T23:59:59.000Z

253

Multifunctional Properties of Cyanate Ester Composites with SiO2 Coated Fe3O4 Fillers  

SciTech Connect (OSTI)

SiO2 coated Fe3O4 submicrometer spherical particles (a conducting core/insulating shell configuration) are fabricated using a hydrothermal method and are loaded at 10 and 20 vol % into a bisphenol E cyanate ester matrix for synthesis of multifunctional composites. The dielectric constant of the resulting composites is found to be enhanced over a wide frequency and temperature range while the low dielectric loss tangent of the neat cyanate ester polymer is largely preserved up to 160 ?C due to the insulating SiO2 coating on individual conductive Fe3O4 submicrometer spheres. These composites also demonstrate high dielectric breakdown strengths at room temperature. Dynamic mechanical analysis indicates that the storage modulus of the composite with a 20 vol % filler loading is twice as high as that of neat resin, but the glass transition temperature considerably decreases with increasing filler content. Magnetic measurements reveal a large saturation magnetization and negligibly low coercivity and remanent magnetization in these composites.

Sun, Weixing; Sun, Wuzhu; Kessler, Michael R.; Bowler, Nicola; Dennis, Kevin W.; McCallum, R. William; Li, Qi; Tan, Xiaoli

2013-02-22T23:59:59.000Z

254

Impedance spectroscopy study of SiO2-Li2O:Nd2O3 glasses  

SciTech Connect (OSTI)

In the present study, neodymium-doped lithium silicate glasses have been prepared by the conventional melt-quenching technique. The dielectric properties, electric modulus and electrical conductivity of SiO2-Li2O (SiLi-0Nd) and SiO2-Li2O:Nd2O3 (SiLi-1.35Nd) have been studied from 1 Hz to 1 MHz in the 333 423 K temperature range. At a given temperature and frequency, we observe that the resistivity increases while the conductivity accordingly decreases when neodymium ions are added to the glass matrix. The activation energy of two distinct regions was evaluated from the ln( dc)=f(1/T) plot and was found to be E1(T<363K)=0.61(0.66)eV and E2(T>363K)=1.26(1.09)eV for SiLi-0Nd (SiLi-1,35Nd). The dielectric constant ( Re) decreases while the dielectric loss (tan ( )) increases under Nd2O3 doping. We also observe that for both glasses, Re and tan ( ) tend to increase with increasing temperature and decrease with increasing frequency.

Pereia, R. [LACANM – Laboratório de Caracterização em Novos Materiais - Brazil] [LACANM – Laboratório de Caracterização em Novos Materiais - Brazil; Gozzo, C B [LACANM – Laboratório de Caracterização em Novos Materiais - Brazil] [LACANM – Laboratório de Caracterização em Novos Materiais - Brazil; Guedes, I. [Universidade Federal do Ceara, Ceara, Brazil] [Universidade Federal do Ceara, Ceara, Brazil; Boatner, Lynn A [ORNL] [ORNL; Terezo, A J [LACANM – Laboratório de Caracterização em Novos Materiais - Brazil] [LACANM – Laboratório de Caracterização em Novos Materiais - Brazil; Costa, M M [LACANM – Laboratório de Caracterização em Novos Materiais - Brazil] [LACANM – Laboratório de Caracterização em Novos Materiais - Brazil

2014-01-01T23:59:59.000Z

255

Surface characterization studies of TiO2 supported manganese oxide catalysts for low temperature SCR of NO with NH3  

E-Print Network [OSTI]

through the scrubber and the electrostatic precipitator or bag-house [5]. The advantages of tail 6 May 2007 Abstract A series of TiO2 supported manganese oxide catalysts were prepared by wet

Boolchand, Punit

256

High ethanol sensitivity of Palladium/TiO2 nanobelt surface heterostructures dominated by enlarged surface area and nano-Schottky junctions  

E-Print Network [OSTI]

by selective acid corrosion and functionalized with Pd catalyst particles. Three nanobelt samples (TiO2 [1­3], lithium-ion batteries [4,5], chemical and bio-sensors [6,7], hydrogen production and storage

Cao, Guozhong

257

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

SciTech Connect (OSTI)

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.

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

2008-12-10T23:59:59.000Z

258

Mesoporous TiO2 beads for high efficiency CdS/ CdSe quantum dot co-sensitized solar cells  

E-Print Network [OSTI]

) as a derivative of dye-sensitized solar cells (DSCs) have attracted considerable attention and been regardedMesoporous TiO2 beads for high efficiency CdS/ CdSe quantum dot co-sensitized solar cells Ru Zhou for a CdS/CdSe quantum dot (QD) co-sensitized solar cell, which was constructed with the mesoporous TiO2

Cao, Guozhong

259

Conduction and charge storage in Cr-thin SiO2-pSi structures J. Capilla and G. Sarrabayrouse  

E-Print Network [OSTI]

niveau d'injection. De plus, le phénomène de claquage observé à haut niveau d'injection est associé à unO2 layer obtained by thermal oxidation in HCl/O2/N2 mixture have uniform and reproducible electrical properties at low injection level. Furthermore the breakdown phenomenon observed at high injection level has

Paris-Sud XI, Université de

260

Role of ethanol in sodalite crystallization in an ethanolNa2OAl2O3SiO2 Yi Huang,ab  

E-Print Network [OSTI]

Role of ethanol in sodalite crystallization in an ethanol­Na2O­Al2O3­SiO2­ H2O system Yi Huang 2011 DOI: 10.1039/c1ce05194f Crystallization of sodalite was studied in an ethanol­Na2O­Al2O3­SiO2­H2O system. The addition of ethanol was observed to significantly affect the crystallization process

Rubloff, Gary W.

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Electrode Materials with the Na0.44MnO2 Structure: Effect ofTitanium Substitution on Physical and Electrochemical Properties  

SciTech Connect (OSTI)

The physical and electrochemical properties of LixMnO2 and LixTi0.11Mn0.89O2 synthesized from precursors made by glycine-nitrate combustion (GNC) and solid-state synthesis methods (SS) are examined in this paper. The highest specific capacities in lithium cells are obtained for SS-LixMnO2 electrodes at low current densities, but GNC-LixTi0.11Mn0.89O2 electrodes show the best high rate performance. These results can be explained by changes in the voltage characteristics and differences in the particle morphologies induced by the Ti-substitution and synthesis method. Ti-substitution also results in a decrease in the electronic conductivity, but greatly improves the thermal properties and imparts dissolution resistance to the electrode. For these reasons, it is preferable to use LixTi0.11MnO0.89O2 in lithium battery configurations rather than LixMnO2. Suggestions for improving the electrochemical performance of the Ti-substituted variant are given based on the results described herein.

Doeff, Marca M; Saint, Juliette A.; Doeff, Marca M; Wilcox, James D.

2008-03-10T23:59:59.000Z

262

Performance of a large TeO2 crystal as a cryogenic bolometer in searching for neutrinoless double beta decay  

E-Print Network [OSTI]

Bolometers are ideal devices in the search for neutrinoless Double Beta Decay. Enlarging the mass of individual detectors would simplify the construction of a large experiment, but would also decrease the background per unit mass induced by alpha-emitters located close to the surfaces and background arising from external and internal gamma's. We present the very promising results obtained with a 2.13 kg TeO2 crystal. This bolometer, cooled down to a temperature of 10.5 mK in a dilution refrigerator located deep underground in the Gran Sasso National Laboratories, represents the largest thermal detector ever operated. The detector exhibited an energy resolution spanning a range from 3.9 keV (at 145 keV) to 7.8 keV (at the 2615 gamma-line of 208Tl) FWHM. We discuss the decrease in the background per unit mass that can be achieved increasing the mass of a bolometer.

L. Cardani; L. Gironi; J. W. Beeman; I. Dafinei; Z. Ge; G. Pessina; S. Pirro; Y. Zhu

2011-06-03T23:59:59.000Z

263

Site-Specific Imaging of Elemental Steps in Dehydration of Diols on TiO2(110)  

SciTech Connect (OSTI)

The conversion of diols on partially reduced TiO2(110) at low coverage was studied using variable-temperature scanning tunneling microscopy, temperature programmed desorption and density functional theory calculations. We find, that below ~230 K, ethane-1,2-diol and propane-1,3-diol molecules adsorb predominantly on five-fold coordinated Ti5c atoms. The dynamic equilibrium between molecularly bound and dissociated species resulting from O-H bond scission and reformation is observed. As the diols start to diffuse on the Ti5c rows above ~230 K, they dissociate irreversibly upon encountering bridging oxygen (Ob) vacancy (VO’s) defects. Two dissociation pathways, one via O-H and the other via C-O bond scission leading to identical surface intermediates, hydroxyalkoxy, Ob-(CH2)n-OH (n = 2, 3) and bridging hydroxyl, HOb, are seen. For O-H bond scission, the Ob-(CH2)n-OH is found on the position of the original VO, while for C-O scission it is found on the adjacent Ob site. Theoretical calculations suggest that the observed mixture of C-O/O-H bond breaking processes are a result of the steric factors enforced upon the diols by the second OH group that is bound to a Ti5c site. At room temperature, rich dissociation/reformation dynamics of the second, Ti5c-bound O-H leads to the formation of dioxo, Ob-(CH2)n-OTi, species. Above ~400 K, both Ob-(CH2)n-OH and Ob-(CH2)n-OTi species convert into a new intermediate, that is centered on Ob row. Combined experimental and theoretical evidence shows that this intermediate is most likely a new dioxo, Ob-(CH2)2-Ob, species. Further annealing leads to sequential C-Ob bond cleavage and alkene desorption above ~ 500 K. Simulations find that the sequential C-O bond breaking process follows a homolytic diradical pathway with the first C-O bond breaking event accompanied by a non-adiabatic electron transfer within the TiO2(110) substrate.

Acharya, Danda P.; Yoon, Yeohoon; Li, Zhenjun; Zhang, Zhenrong; Lin, Xiao; Mu, Rentao; Chen, Long; Kay, Bruce D.; Rousseau, Roger J.; Dohnalek, Zdenek

2013-11-26T23:59:59.000Z

264

Thermal stability of Pd supported on single crystalline SiO2 thin films B. K. Min, A. K. Santra, and D. W. Goodmana)  

E-Print Network [OSTI]

between elemental Si and a range of metals is thermodynamically favorable,7,8 whereas silicide formation,14 On the other hand, silicide formation by direct interaction between a metal and SiO2 has also been reported undertaken to un- derstand the thermal stability of metal particles and the mechanism of silicide formation

Goodman, Wayne

265

Control of silicidation in HfO2/Si,,100... interfaces Deok-Yong Cho, Kee-Shik Park, B.-H. Choi,a  

E-Print Network [OSTI]

like nitrogen.6,7 Among these, Hf-silicide is probably most detrimental since it is metallic and degrades the capacitor performance. Metal- lic Hf-silicide formation has been reported in the interfaceControl of silicidation in HfO2/Si,,100... interfaces Deok-Yong Cho, Kee-Shik Park, B.-H. Choi

Oh, Se-Jung

266

PHYSICAL REVIEW B 84, 245115 (2011) Electronic structure of dye-sensitized TiO2 clusters from many-body perturbation theory  

E-Print Network [OSTI]

by the need for clean and sustainable energy. In this respect dye-sensitized solar cells (DSC) are considered the traditional solid-state cells is a dye-sensitized solar cell (DSC).1,2 In this type of cell, the lightPHYSICAL REVIEW B 84, 245115 (2011) Electronic structure of dye-sensitized TiO2 clusters from many

267

The effect of TiCl4-treated TiO2 compact layer on the performance of dye-sensitized solar cell  

E-Print Network [OSTI]

The effect of TiCl4-treated TiO2 compact layer on the performance of dye-sensitized solar cell by a factor of five compared with the bare cell. Ã? 2011 Elsevier B.V. All rights reserved. 1. Introduction Dye-sensitized: Received 11 October 2011 Accepted 25 October 2011 Available online 4 November 2011 Keywords: Dye-sensitized

Park, Byungwoo

268

Growth of Aligned Single-Crystalline Rutile TiO2 Nanowires on Arbitrary Substrates and Their Application in Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

and Their Application in Dye-Sensitized Solar Cells Akshay Kumar, Anuj R. Madaria, and Chongwu Zhou* Department array of TiO2 nanowires on FTO as the photoanode is demonstrated in dye-sensitized solar cell for applications related to solar energy such as dye-sensitized solar cell (to convert light into electricity),18

Zhou, Chongwu

269

An Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 Nanotube Arrays  

E-Print Network [OSTI]

An Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 harvest and storage processes. This power pack incorporates a series-wound dye- sensitized solar cell, nanostructures have been widely used in energy harvesting devices, such as dye-sensitized solar cells (DSSCs

Wang, Zhong L.

270

in matematica, fisica e filosofia V e n e r d i 2 6 M a r z o 2 0 0 4  

E-Print Network [OSTI]

L�infinito in matematica, fisica e filosofia V e n e r d i 2 6 M a r z o 2 0 0 4 curatori: Vieri, Università di Pisa Lucio Russo Dip. Matematica dell'Università di Roma II Steven Shore Dip. Fisica Carlo Toffalori Dip. Matematica e Fisica, Università di Camerino Vieri Benci Dip. Matematica Applicata

Di Nasso, Mauro

271

Effect of low pO2 and host plant on colonization of roots by Pseudomonas putida PH6 (L1019)  

E-Print Network [OSTI]

tended to accumulate 1.3-fold more carbon, and "total" bacterial numbers were 1.8 to 2.4-fold higher in the low pO2 treatments than under aerated conditions. However, numbers of L1019 were 1.2 to 5.4-fold higher under aerated conditions, suggesting...

Tavaria, Freni Kekhasharu

1995-01-01T23:59:59.000Z

272

Surface Modification of LiNi0.5Mn0.3Co0.2O2 Cathode for Improved Battery Performance  

E-Print Network [OSTI]

This thesis details electrical and physical measurements of pulsed laser deposition-applied thin film coatings of Alumina, Ceria, and Yttria-stabilized Zirconia (YSZ) on a LiNi0.5Mn0.3Co0.2O2 (NMC) cathode in a Lithium ion battery. Typical NMC...

Lynch, Thomas

2012-10-19T23:59:59.000Z

273

Magnetic Fe3O4@TiO2 Nanoparticles-based Test Strip Immunosensing Device for Rapid Detection of Phosphorylated Butyrylcholinesterase  

SciTech Connect (OSTI)

An integrated magnetic nanoparticles-based test-strip immunosensing device was developed for rapid and sensitive quantification of phosphorylated butyrylcholinesterase (BChE), the biomarker of exposure to organophosphous pesticides (OP), in human plasma. In order to overcome the difficulty in scarce availability of OP-specific antibody, here magnetic Fe3O4@TiO2 nanoparticles were used and adsorbed on the test strip through a small magnet inserted in the device to capture target OP-BChE through selective binding between TiO2 and OP moiety. Further recognition was completed by horseradish peroxidase (HRP) and anti-BChE antibody (Ab) co-immobilized gold nanoparticles (GNPs). Their strong affinities among Fe3O4@TiO2, OP-BChE and HRP/Ab-GNPs were characterized by quartz crystal microbalance (QCM), surface plasmon resonance (SPR) and square wave voltammetry (SWV) measurements. After cutting off from test strip, the resulted immunocomplex (HRP/Ab-GNPs/OP-BChE/Fe3O4@TiO2) was measured by SWV using a screen printed electrode under the test zone. Greatly enhanced sensitivity was achieved by introduction of GNPs to link enzyme and antibody at high ratio, which amplifies electrocatalytic signal significantly. Moreover, the use of test strip for fast immunoreactions reduces analytical time remarkably. Coupling with a portable electrochemical detector, the integrated device with advanced nanotechnology displays great promise for sensitive, rapid and in-filed on-site evaluation of OP poisoning.

Ge, Xiaoxiao; Zhang, Weiying; Lin, Yuehe; Du, Dan

2013-12-15T23:59:59.000Z

274

ZnO-TiO2 Core-Shell Nanorod/P3HT Solar Cells Lori E. Greene, Matt Law, Benjamin D. Yuhas, and Peidong Yang*  

E-Print Network [OSTI]

be inefficient because the disordered, interpenetrating networks of the two phases result in tortuous conduction-conducting polymer P3HT. Thin shells of TiO2 grown on the ZnO nanorods by atomic layer deposition significantly-film photovoltaics. Polymer-inorganic hybrid solar cells are of particular interest because they combine the solution

Yang, Peidong

275

Molecular Dynamics Study of Vibrational Excitation Dynamics and Desorption in Solid O2 Lukasz Dutkiewicz,*, Robert E. Johnson, Akos Vertes, and Roman Pedrys  

E-Print Network [OSTI]

Molecular Dynamics Study of Vibrational Excitation Dynamics and Desorption in Solid O2 LukaszVed: September 8, 1998 Molecular dynamics calculations were performed to describe vibrational to translational is the conversion of internal energy to lattice motion and desorption. Therefore, we use molecular dynamics

Vertes, Akos

276

Air stable Al2O3-coated Li2NiO2 cathode additive as a surplus current consumer in a Li-ion cell  

E-Print Network [OSTI]

cathode additive is prepared by coating with Al iso-propoxide on Li2NiO2, obtained from firing exothermic reaction with an electrolyte during the overcharging process, which may result in a short-circuiting of the cell.5­9 A combination of the temperature increase and the internal short circuit of the cell

Cho, Jaephil

277

Nb-doped TiO2 Nanofibers for Lithium Ion Batteries M. Fehse,, S. Cavaliere, P. E. Lippens, I. Savych, A. Iodacela, L.  

E-Print Network [OSTI]

Nb-doped TiO2 Nanofibers for Lithium Ion Batteries M. Fehse,, S. Cavaliere, P. E. Lippens, I, lithium ion batteries (LIB) have come a long way.1 Originally intended to serve only for small portable properties due to necessary solid elec- trolyte interphase (SEI) formation and the risk of lithium plating

Paris-Sud XI, Université de

278

Phase Transitions and High-Voltage Electrochemical Behavior of LiCoO2 Thin Films Grown by Pulsed Laser Deposition  

E-Print Network [OSTI]

Laser Deposition H. Xia,a L. Lu,b,z Y. S. Meng,c and G. Cederc, * a Advanced Materials for Micro behavior of LiCoO2 thin-film cathodes prepared by pulsed laser deposition are studied for charging voltages- discharge curves. Ex situ X-ray diffraction measurements confirm structural changes and a phase transition

Ceder, Gerbrand

279

Rate constants for the reactions of O+ with N2 and O2 as a function of temperature (300–1800 K)  

E-Print Network [OSTI]

We have studied the rate constants for the reaction of O+ with N2 over the temperature range 300–1600 K and the reaction of O+ with O2 over the range 300 to 1800 K. The results are in good agreement with previous measurements ...

Hierl, Peter M.; Dotan, I.; Seeley, John V.; Doren, Jane M. Van; Morris, Robert A.; Viggiano, A. A.

1997-01-01T23:59:59.000Z

280

Group velocities in coplanar strip transmission lines on Si and Si/SiO2 /Si substrates measured using differential electro-optic sampling  

E-Print Network [OSTI]

Group velocities in coplanar strip transmission lines on Si and Si/SiO2 /Si substrates measured 1996; accepted for publication 26 August 1996 The group velocities in coplanar strip transmission lines-9 Velocity measurements have been previously carried out for coplanar transmission lines on a variety

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Witten's Problems, Set Six ---N o . 2 (solution written by D. Freed) (2) In this exercise we will compute the oneloop renormalization of U(1) gauge theory  

E-Print Network [OSTI]

Witten's Problems, Set Six --- N o . 2 (solution written by D. Freed) Problem: (2) In this exercise is D ij = D 0 ij + \\Sigma ij , where \\Sigma ij , the ``self­energy,'' is to be computed from loops. A very fundamental property of \\Sigma ij is that in momentum space k i \\Sigma ij (k) = 0. (An explanation

282

v o l. 6 n o. 2 W i n t e r 2 0 0 4 School of Computer Science, Telecommunications & Information Systems  

E-Print Network [OSTI]

v o l. 6 n o. 2 W i n t e r 2 0 0 4 School of Computer Science, Telecommunications & Information #12;"We wanted to put together a cinema degree program that is ahead of the times," says Matthew Irvine, director of DePaul's Digital Cinema Centers and an assistant professor who helped develop

Schaefer, Marcus

283

Two-color optical technique for characterization of x-ray radiation-enhanced electron transport in SiO2  

E-Print Network [OSTI]

Two-color optical technique for characterization of x-ray radiation-enhanced electron transport the oxide.2 Presently, characterization of radiation damage in Si/SiO2 systems is usually accomplished used to provide additional insight into radiation damage in ultrathin oxides.3 These measure- ments

Pantelides, Sokrates T.

284

Impact of three different TiO2 morphologies on hydrogen evolution by methonal assisted water-splitting: nanoparticles, nanotubes and  

E-Print Network [OSTI]

-splitting: nanoparticles, nanotubes and aerogels. (published in International Journal of Hydrogen Energy 36, 22 (2011, nanotubes and aerogels. These materials have shown different behaviours depending on both their composition of the samples (nanotubes or aerogels). Among all the tested samples, the TiO2 aerogel supported Pt one exhibited

Boyer, Edmond

285

Enhanced visible-light absorption of mesoporous TiO2 by co-doping with transition-metal/nitrogen ions  

SciTech Connect (OSTI)

Titanium (IV) oxide, TiO2, has been the object of intense scrutiny for energy applications. TiO2 is inexpensive, non-toxic, and has excellent corrosion resistance when exposed to electrolytes. A major drawback preventing the widespread use TiO2 for photolysis is its relatively large band gap of ~3eV. Only light with wavelengths shorter than 400 nm, which is in the ultraviolet portion of the spectrum, has sufficient energy to be absorbed. Less than 14 percent of the solar irradiation reaching the earth s surface has energy exceeding this band gap. Adding dopants such as transition metals has long been used to reduce the gap and increase photocatalytic activity by accessing the visible part of the solar spectrum. The degree to which the band gap is reduced using transition metals depends in part on the overlap of the d-orbitals of the transition metals with the oxygen p-orbitals. Therefore, doping with anions such as nitrogen to modify the cation-anion orbital overlap is another approach to reduce the gap. Recent studies suggest that using a combination of transition metals and nitrogen as dopants is more effective at introducing intermediate states within the band gap, effectively narrowing it. Here we report the synthesis of mesoporous TiO2 spheres, co-doped with transition metals and nitrogen that exhibit a nearly flat absorbance response across the visible spectrum extending into the near infrared.

Mathis, John [Embry-Riddle Aeronautical University; Bi, Zhonghe [ORNL; Bridges, Craig A [ORNL; Kidder, Michelle [ORNL; Paranthaman, Mariappan Parans [ORNL

2013-01-01T23:59:59.000Z

286

Dependence of Band Offset and Open-Circuit Voltage on the Interfacial Interaction between TiO2 and Carboxylated Polythiophenes  

E-Print Network [OSTI]

the open-circuit voltage. An attractive approach for making low-cost photovoltaic (PV) cells is to use bulk, 2005 The interface of planar TiO2/polymer photovoltaic cells was modified with two carboxylated to titania surfaces in photovoltaic cells. If the density of attachment groups is just enough to attach

McGehee, Michael

287

A Novel Combustion Synthesis Preparation of CuO/ZnO/ZrO2/Pd for Oxidative Hydrogen Production from Methanol  

E-Print Network [OSTI]

cells using hydrogen as fuel are efficient, quiet, and have near zero harmful emissions. Elemental fuel cells that use precious metal catalysts such as platinum require hydrogen fuel which contains lessA Novel Combustion Synthesis Preparation of CuO/ZnO/ZrO2/Pd for Oxidative Hydrogen Production from

Mukasyan, Alexander

288

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)

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.

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

2011-12-31T23:59:59.000Z

289

Dual Phase Li4 Ti5O12–TiO2 Nanowire Arrays As Integrated Anodes For High-rate Lithium-ion Batteries  

SciTech Connect (OSTI)

Lithium titanate (Li4Ti5O12) is well known as a zero strain material inherently, which provides excellent long cycle stability as a negative electrode for lithium ion batteries. However, the low specific capacity (175 mA h g?1) limits it to power batteries although the low electrical conductivity is another intrinsic issue need to be solved. In this work, we developed a facile hydrothermal and ion-exchange route to synthesize the self-supported dual-phase Li4Ti5O12–TiO2 nanowire arrays to further improve its capacity as well as rate capability. The ratio of Li4Ti5O12 to TiO2 in the dual phase Li4Ti5O12–TiO2 nanowire is around 2:1. The introduction of TiO2 into Li4Ti5O12 increases the specific capacity. More importantly, by interface design, it creates a dual-phase nanostructure with high grain boundary density that facilitates both electron and Li ion transport. Compared with phase-pure nanowire Li4Ti5O12 and TiO2 nanaowire arrays, the dual-phase nanowire electrode yielded superior rate capability (135.5 at 5 C, 129.4 at 10 C, 120.2 at 20 C and 115.5 mA h g?1 at 30 C). In-situ transmission electron microscope clearly shows the near zero deformation of the dual phase structure, which explains its excellent cycle stability.

Liao, Jin; Chabot, Victor; Gu, Meng; Wang, Chong M.; Xiao, Xingcheng; Chen, Zhongwei

2014-08-19T23:59:59.000Z

290

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

SciTech Connect (OSTI)

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 ½, 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.

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

2008-04-01T23:59:59.000Z

291

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

E-Print Network [OSTI]

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%.

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

2012-12-15T23:59:59.000Z

292

Catalytic epoxidation of propene with H2OO2 reactants on Au/TiO2w Manuel Ojeda and Enrique Iglesia*  

E-Print Network [OSTI]

was obtained from Degussa (P25, anatase/rutile B4). Propene (4 kPa, Praxair, UHP) epoxidation rates and selectivity were measured using O2 (4 kPa, Praxair, UHP) at 350 K in the presence and absence of H2 (4 kPa, 99.999%, Praxair) or H2O (0­12 kPa) using a tubular flow reactor with plug-flow hydrodynamics (He was used

Iglesia, Enrique

293

Model relation between the energy-band edge and the Fermi level of the nondegenerate semiconductor TiO2: Application to electrochemistry  

E-Print Network [OSTI]

, i.e., anatase and rutile, are widely used in photocatalysis and dye-sensitized solar cell DSSC, is demonstrated in the comparative studies of anatase and rutile TiO2 that are used in photocatalysis and dye-sensitized solar cells. DOI: 10.1103/PhysRevB.82.235109 PACS number s : 82.45.Vp, 71.38.Ht, 73.40. c, 82.47.Jk I

Li, Weixue

294

Strength and Elasticity of SiO2 across the StishoviteCaCl2-type Structural Phase Boundary Sean R. Shieh* and Thomas S. Duffy  

E-Print Network [OSTI]

Strength and Elasticity of SiO2 across the Stishovite­CaCl2-type Structural Phase Boundary Sean R and to decrease sharply as the stishovite­CaCl2-type phase transition boundary is approached. Inversion to an orthorhombic CaCl2-type struc- ture at 50 3 GPa on the basis of theoretical calculations [8­11], Raman

Duffy, Thomas S.

295

Strong Sulfur Binding with Conducting Magneli-Phase TinO2n-1 Nanomaterials for Improving Lithium-Sulfur Batteries  

E-Print Network [OSTI]

will go through a series of soluble intermediate higher-order polysulfides (Li2S8, Li2S6, and Li2S4 of Li2S2, Li2S, and sulfur.6-8 In order to solve these challenges, there have been recent developmentsStrong Sulfur Binding with Conducting Magneli-Phase TinO2n-1 Nanomaterials for Improving Lithium-Sulfur

Cui, Yi

296

Role of ethylene on surface oxidation of TiO2(110) Y. Murata, V. Petrova, I. Petrov, C. V. Ciobanu, and S. Kodambaka  

E-Print Network [OSTI]

Institute of Physics. [http://dx.doi.org/10.1063/1.4767954] Transition-metal (TM) oxides,1 notably titanium dioxide (TiO2),2­4 have a wide variety of applications in photocataly- sis, for splitting of water5­13 and are essential to promote adsorption and reaction of gas molecules.14 As O atoms desorb from the sur- face of Ti

Ciobanu, Cristian

297

Dust in brown dwarfs and extra-solar planets IV. Assessing TiO2 and SiO nucleation for cloud formation modeling  

E-Print Network [OSTI]

Clouds form in atmospheres of brown dwarfs and planets. The cloud particle formation processes are similar to the dust formation process studied in circumstellar shells of AGB stars and in Supernovae. Cloud formation modelling in substellar objects requires gravitational settling and element replenishment in addition to element depletion. All processes depend on the local conditions, and a simultaneous treatment is required. We apply new material data in order to assess our cloud formation model results regarding the treatment of the formation of condensation seeds. We re-address the question of the primary nucleation species in view of new (TiO2)_N-cluster data and new SiO vapour pressure data. We apply the density functional theory using the computational chemistry package Gaussian 09 to derive updated thermodynamical data for (TiO2)_N-clusters as input for our TiO2 seed formation model. We test different nucleation treatments and their effect on the overall cloud structure by solving a system of dust momen...

Lee, G; Giles, H; Bromley, S T

2014-01-01T23:59:59.000Z

298

Self-Organized Amorphous TiO2 Nanotube Arrays on Porous Ti Foam for Rechargeable Lithium and Sodium Ion Batteries  

SciTech Connect (OSTI)

Self-organized amorphous TiO2 nanotube arrays (NTAs) were successfully fabricated on both Ti foil and porous Ti foam through electrochemical anodization techniques. The starting Ti foams were fabricated using ARCAM s Electron Beam Melting (EBM) technology. The TiO2 NTAs on Ti foam were used as anodes in lithium ion batteries; they exhibited high capacities of 103 Ahcm-2 at 10 Acm-2 and 83 Ahcm-2 at 500 Acm-2, which are two to three times higher than those achieved on the standard Ti foil, which is around 40 Ahcm-2 at 10 Acm-2 and 24 Ahcm-2 at 500 Acm-2, respectively. This improvement is mainly attributed to higher surface area of the Ti foam and higher porosity of the nanotube arrays layer grown on the Ti foam. In addition, a Na-ion half-cell composed of these NTAs anodes and Na metal showed a self-improving specific capacity upon cycling at 10 Acm-2. These results indicate that TiO2 NTAs grown on Ti porous foam are promising electrodes for Li-ion or Na-ion rechargeable batteries.

Bi, Zhonghe [ORNL; Paranthaman, Mariappan Parans [ORNL; Menchhofer, Paul A [ORNL; Dehoff, Ryan R [ORNL; Bridges, Craig A [ORNL; Chi, Miaofang [ORNL; Guo, Bingkun [ORNL; Sun, Xiao-Guang [ORNL; Dai, Sheng [ORNL

2013-01-01T23:59:59.000Z

299

Spatially-resolved EELS and EDS Analysis of HfOxNy Gate Dielectrics Deposited by MOCVD using [(C2H5)2N]4Hf with NO and O2  

E-Print Network [OSTI]

-resolved electron energy loss spectroscopy (EELS) and energy-dispersive spectrometry (EDS). HfOxNy gate dielectrics a replacement for SiO2 as the gate dielectric material. HfO2 is a promising candidate due to its high dielectric constant its stability on Si. However, crystallization temperatures of less than 500 °C and high impurity

Ng, Wai Tung

300

Microwave Plasma Chemical Vapor Deposition of Carbon Coatings on LiNi1/3Co1/3Mn1/3O2 for Li-Ion Battery Composite Cathodes  

E-Print Network [OSTI]

O 2 for Li-ion Battery Composite Cathodes Marek L. MarcinekRaman spectroscopy. The composite LiNi 1/3 Co 1/3 Mn 1/3 O 2electronic contact within the composite cathode and does not

Doeff, M.M.

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Properties of c-C4F8 inductively coupled plasmas. II. Plasma chemistry and reaction mechanism for modeling of Arc-C4F8 O2 discharges  

E-Print Network [OSTI]

to experiments for validation. The consequences of charge exchange of fluorocarbon species with Ar and CO on the ratio of light to heavy fluorocarbon ion densities in Ar/c-C4F8 /O2 /CO plasmas are discussed. We found but weakly depend on the addition of O2 . The ratio of light to heavy fluorocarbon ion densities increases

Kushner, Mark

302

Near-resonance enhanced O2 detection for dual-broadband pure rotational coherent anti-Stokes Raman scattering with an ultraviolet-visible setup at 266 nm  

SciTech Connect (OSTI)

Broadband and dual-broadband coherent anti-Stokes Raman scattering (CARS) are widely established tools for nonintrusive gas diagnostics. Up to now the investigations have been mainly performed for electronic nonresonant conditions of the gas species of interest. We report on the enhancement of the O2-N2 detection limit of dual-broadband pure rotational CARS by shifting the wavelength of the narrowband pump laser from the commonly used 532-266 nm. This enhancement is caused when the Schumann-Runge absorption band is approached near 176 nm. The principal concept of this experiment, i.e., covering the Raman resonance with a single- or dual-broadband combination of lasers in the visible range and moving only the narrowband probe laser near or directly into electronic resonant conditions in the UV range, should also be applicable to broadband CARS experiments to directly exploit electronic resonance effects for the purpose of single-shot concentration measurements of minority species. To quantify the enhancement in O2 sensitivity, comparative measurements at both a 266 and a 532 nm narrowband pump laser wavelength are presented, employing a 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyram (DCM) dye laser as a broadband laser source at 635 nm. An increase of approximately 13% in the ratio of the rotational CARS cross sections of O2 and N2 was obtained. The broad spectral width of the CARS excitation profile was approximately equal for both setups. Further enhancement should be achievable by shifting the narrowband pump laser closer toward 176 nm, for example, with a frequency-doubled optical parametric oscillator or an excimer laser. The principal concept of this experiment should also be applicable to broadband CARS experiments to directly exploit electronic resonance effects of the narrowband pump laser with electronic transitions of minority species for the purpose of single-shot concentration measurements of those species.

Schenk, Martin; Seeger, Thomas; Leipertz, Alfred

2005-07-01T23:59:59.000Z

303

Co-operativity among defect sites in AnO2+ and An4O9 (An = U, Np or Pu)  

SciTech Connect (OSTI)

Actinide dioxides derived from the AnO{sub 2} fluorite lattice are of high technological relevance due to their application in nuclear reactor fuels. Oxidation of AnO{sub 2} compounds emerges as a central theme in fuel fabrication, reactor operation, long-term storage forms for both spent fuels and surplus weapons materials, and environmental actinide migration. In this paper, we use density functional theory calculations to study the oxidation of uranium, neptunium and plutonium dioxides, AnO{sub 2} (An = U, Np or Pu), in O{sub 2} and O{sub 2}/H{sub 2}O environments. We pay particular attention to the formation of oxygen clusters (co-operativity) in AnO{sub 2+x} and how this phenomenon govern oxidation thermodynamics and the development of ordered An{sub 4}O{sub 9} compounds. The so-called split di-interstitial, which is composed of two nearest neighbor octahedral oxygen interstitials that are distorted in such a way that they dislocate one regular fluorite lattice oxygen ion to form a cluster of triangular geometry, is predicted to be the fundamental building block of the most stable cluster configurations. We also identify how the formation of oxygen defect clusters and the degree of oxidation in AnO{sub 2+x} are both governed by the characer of the An-5f to excess O-2p charger transfer, i.e. the charge transfer to the O-2p orbitals of the interstitial-like (+x) ions, and the ability of the excess O-2p orbitals to hybridize with regular fluorite lattice ions.

Andersson, Anders David [Los Alamos National Laboratory; Lezama Pacheco, Juan [Los Alamos National Laboratory; Uberuaga, Blas P [Los Alamos National Laboratory; Conradson, Steven D [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

304

Adsorption of water on O(2x2)/Ru(0001): thermal stability and inhibition of dissociation by H2O-O bonding  

SciTech Connect (OSTI)

The effect of preadsorbed oxygen on the subsequent adsorption and reactions of water on Ru(0001) has been studied using low temperature scanning tunneling microscopy and DFT calculations. Experiments were carried out for O coverages close to 0.25 ML. It was found that no dissociation of water takes place up to the desorption temperature of {approx}180-230 K. DFT calculations show that intact water on O(2x2)/Ru(0001) is {approx} 0.49 eV more stable than the dissociation products, H and OH, at their preferred fcc and top adsorption sites.

Mugarza, Aitor; Shimizu, Tomoko; Cabrera-Sanfelix, Pepa; Sanchez-Portal, Daniel; Arnau, Andres; Salmeron, Miquel

2008-08-01T23:59:59.000Z

305

Investigation of the liquid/vapor composition of compressed liquid CO2 with N2 and O2 in integrated pollutant removal systems for coal combustion  

SciTech Connect (OSTI)

Accurate prediction of the processes in Integrated Pollutant Removal (IPR) using compression and condensation of coal combustion products requires an understanding of the liquid/vapor ternary CO2/O2/N2 system. At conditions close to the critical point of CO2 the existing equations of state deviate from the sparse measured results available in the literature. Building on existing data and procedures, the USDOE/Albany Research Center has designed an apparatus for examining compositions in this region. The design of the apparatus and planned initial experiments are presented.

Oryshchyn, Danylo B.; Ochs, Thomas L.; Summers, Cathy A.; Penner, Larry R.; Gerdemann, Stephen J.

2005-01-01T23:59:59.000Z

306

Excellent Passivation and Low Reflectivity Al2O3/TiO2 Bilayer Coatings for n-Wafer Silicon Solar Cells: Preprint  

SciTech Connect (OSTI)

A bilayer coating of Al2O3 and TiO2 is used to simultaneously achieve excellent passivation and low reflectivity on p-type silicon. This coating is targeted for achieving high efficiency n-wafer Si solar cells, where both passivation and anti-reflection (AR) are needed at the front-side p-type emitter. It could also be valuable for front-side passivation and AR of rear-emitter and interdigitated back contact p-wafer cells. We achieve high minority carrier lifetimes {approx}1 ms, as well as a nearly 2% decrease in absolute reflectivity, as compared to a standard silicon nitride AR coating.

Lee, B. G.; Skarp, J.; Malinen, V.; Li, S.; Choi, S.; Branz, H. M.

2012-06-01T23:59:59.000Z

307

Mercury nonstoichiometry of the Hg1-xBa2CuO4+ superconductor and the P(Hg)-P(O2)-T phase diagram of the Hg-Ba-Cu-O system.  

E-Print Network [OSTI]

1 Mercury nonstoichiometry of the Hg1-xBa2CuO4+ superconductor and the P(Hg)-P(O2)-T phase diagram-nonstoichiometry and exists in a certain P(Hg), P(O2) and T range. Mercury nonstoichiometry of Hg-1201 was investigated in the 923 T 1095 K; 2.0 P(Hg) 8.4 atm; 0.09 P(O2) 0.86 atm ranges. It was found that the mercury

Rudnyi, Evgenii B.

308

Water adsorption, solvation and deliquescence of alkali halide thin films on SiO2 studied by ambient pressure X-ray photoelectron spectroscopy  

SciTech Connect (OSTI)

The adsorption of water on KBr thin films evaporated onto SiO2 was investigated as a function of relative humidity (RH) by ambient pressure X-ray photoelectron spectroscopy. At 30percent RH adsorbed water reaches a coverage of approximately one monolayer. As the humidity continues to increase, the coverage of water remains constant or increases very slowly until 60percent RH, followed by a rapid increase up to 100percent RH. At low RH a significant number of the Br atoms are lost due to irradiation damage. With increasing humidity solvation increases ion mobility and gives rise to a partial recovery of the Br/K ratio. Above 60percent RH the increase of the Br/K ratio accelerates. Above the deliquescence point (85percent RH), the thickness of the water layer continues to increase and reaches more than three layers near saturation. The enhancement of the Br/K ratio at this stage is roughly a factor 2.3 on a 0.5 nm KBr film, indicating a strong preferential segregation of Br ions to the surface of the thin saline solution on SiO2.

Arima, Kenta; Jiang, Peng; Deng, Xingyi; Bluhm, Henrik; Salmeron, Miquel

2010-03-31T23:59:59.000Z

309

TiO2-modified Ag-CuO Reactive Air Brazes for Improved Wettability on Mixed Ionic/Electronic Conductors  

SciTech Connect (OSTI)

Mixed ionic/electronic conducting perovskite oxides such as lanthanum strontium cobalt ferrite (LSCF) are strong candidates for potential use in a number of electrochemical devices, including gas separation membranes and solid oxide fuel cells (SOFC). Underlying the excitement over the these novel ceramics is the engineering challenge of effectively incorporating them into practical devices. Taking full advantage of the unique properties of advanced ceramics such as mixed conducting oxides depends in large part on being able to develop reliable joining techniques. Earlier studies have indicated that Ag-CuO reactive air braze (RAB) compositions are effective in joining to LSCF. Meanwhile, it has been found that small additions of as little as 0.5 mol% titanium oxide to Ag-CuO RAB compositions cause a dramatic increase in the wettability of RAB on many oxide ceramic surfaces. Therefore the wettabilty of Ag-CuO-TiO2 brazes on LSCF substrates will be examined and the flexural strength, microstructure, and conductivity of joints in LSCF made using Ag-CuO-TiO2 brazes will be discussed. Long-term aging effects on conductivity and microstructure will also be presented.

Hardy, John S.; Weil, K. Scott; Kim, Jin Yong Y.; Thomsen, Ed C.; Darsell, Jens T.

2005-03-01T23:59:59.000Z

310

Probing Defect Sites on TiO_2 with H_3 Re_3 (CO)_12 : Spectroscopic Characterization of the Surface Species  

SciTech Connect (OSTI)

Samples of the anatase phase of titania were treated under vacuum to create Ti3+ surface-defect sites and surface O- and O2- species (indicated by electron paramagnetic resonance (EPR) spectra), accompanied by the disappearance of bridging surface OH groups and the formation of terminal Ti3+OH groups (indicated by IR spectra). EPR spectra showed that the probe molecule [Re3(CO)12H3] reacted preferentially with the Ti3+ sites, forming Ti4+ sites with OH groups as the [Re3(CO)12H3] was adsorbed. Extended X-ray absorption fine structure (EXAFS) spectra showed that these clusters were deprotonated upon adsorption, with the triangular metal frame remaining intact; EPR spectra demonstrated the simultaneous removal of surface O- and O2- species. The data determined by the three complementary techniques form the basis of a schematic representation of the surface chemistry. According to this picture, during evacuation at 773 K, defect sites are formed on hydroxylated titania as a bridging OH group is removed, forming two neighboring Ti3+ sites, or, when a Ti4+O bond is cleaved, forming a Ti3+ site and an O- species, with the Ti4+OH group being converted into a Ti3+OH group. When the probe molecule [Re3(CO)12H3] is adsorbed on a titania surface with Ti3+ defect sites, it reacts preferentially with these sites, becoming deprotonated, removing most of the oxygen radicals, and healing the defect sites.

Suriye,K.; Lobo-Lapidus, R.; Yeagle, G.; Praserthdam, P.; Britt, R.; Gates, B.

2008-01-01T23:59:59.000Z

311

Electronic and vibrational properties of ultrathin SiO2 films grown on Mo(112) S. Wendt, E. Ozensoy, T. Wei, M. Frerichs, Y. Cai, M. S. Chen, and D. W. Goodman*  

E-Print Network [OSTI]

electron spectroscopy MIES , and po- larization modulation infrared reflection absorption spectroscopy PM. The physical properties of SiO2 films near one monolayer are influenced by the Mo substrate due to the Si

Goodman, Wayne

312

Layered Li1+x(Ni0.425Mn0.425Co0.15)1xO2 Positive Electrode Materials for Lithium-Ion Batteries  

E-Print Network [OSTI]

Layered Li1+x(Ni0.425Mn0.425Co0.15)1­xO2 Positive Electrode Materials for Lithium-Ion Batteries range decreased with overlithiation Keywords : Although LiCoO2 is suitable for the lithium-ion battery electrochemical performances. Recently lithium-rich manganese-based materials such as Li[NixLi(1/3­2x/3)Mn(2/3­x/3

Boyer, Edmond

313

Local magnetism in the molecule-based metamagnet [Ru2(O2CMe)4]3[Cr(CN)6] probed with implanted muons  

SciTech Connect (OSTI)

We present a muon-spin relaxation study of local magnetism in the molecule-based metamagnet [Ru2(O2CMe)4]3[Cr(CN)6]. We observe magnetic order with TN = 33 K, although above 25 K the sublattice spins become less rigid and a degree of static magnetic disorder is observed. The comparison of measurements in applied magnetic field with simulations allows us to understand the origin of the muon response across the metamagnetic transition and to map out the phase diagram of the material. Applied hydrostatic pressures of up to 6 kbar lead to an increase in the local magnetic field along with a complex change in the internal magnetic field distribution.

Lancaster, T. [University of Oxford; Pratt, F. L. [ISIS Facility, Rutherford Appleton Laboratory; Blundell, S. J. [University of Oxford; Steele, Andrew J. [University of Oxford; Baker, Peter J. [ISIS Facility, Rutherford Appleton Laboratory; Wright, Jack D. [University of Oxford; Fishman, Randy Scott [ORNL; Miller, Joel S. [University of Utah

2011-01-01T23:59:59.000Z

314

Neganov-Luke amplified cryogenic light detectors for the background discrimination in neutrinoless double beta decay search with TeO$_{2}$ bolometers  

E-Print Network [OSTI]

We demonstrate that Neganov-Luke amplified cryogenic light detectors with Transition Edge Sensor read-out can be applied for the background suppression in cryogenic experiments searching for the neutrinoless double beta decay of $^{130}\\text{Te}$ with TeO$_{2}$ based bolometers. Electron and gamma induced events can be discriminated from $\\alpha$ events by detecting the Cherenkov light produced by the $\\beta$ particles emitted in the decay. We use the Cherenkov light produced by events in the full energy peak of $^{208}\\text{Tl}$ and by events from a $^{147}\\text{Sm}$ source to show that at the Q-value of the neutrinoless double beta decay of $^{130}\\text{Te}$ ($Q_{\\beta \\beta} = 2.53 \\,\\text{MeV}$), a separation of $e^{-}/\\gamma$ events from $\\alpha$ events can be achieved on an event-by-event basis with practically no reduction in signal acceptance.

M. Willers; F. v. Feilitzsch; A. Giuliani; A. Gütlein; A. Münster; J. -C. Lanfranchi; L. Oberauer; W. Potzel; S. Roth; S. Schönert; M. v. Sivers; S. Wawoczny; A. Zöller

2014-11-28T23:59:59.000Z

315

Background discrimination in neutrinoless double beta decay search with $\\textrm{TeO}_{2}$ bolometers using Neganov-Luke amplified cryogenic light detectors  

E-Print Network [OSTI]

We demonstrate that Neganov-Luke amplified cryogenic light detectors with Transition Edge Sensor read-out can be applied for the background suppression in cryogenic experiments searching for the neutrinoless double beta decay of $^{130}\\text{Te}$ with $\\text{TeO}_{2}$ based bolometers. Electron and gamma induced events can be discriminated from $\\alpha$ events by detecting the Cherenkov light produced by the $\\beta$ particles emitted in the decay. We use the Cherenkov light produced by events in the full energy peak of $^{208}\\text{Tl}$ and by events from a $^{147}\\text{Sm}$ source to show that at the Q-value of the neutrinoless double beta decay of $^{130}\\text{Te}$ ($Q_{\\beta \\beta} = 2.53 \\,\\text{MeV}$), a separation of $e^{-}/\\gamma$ events from $\\alpha$ events can be achieved on an event-by-event basis with practically no reduction in signal acceptance.

Willers, M; Giuliani, A; Gütlein, A; Münster, A; Lanfranchi, J -C; Oberauer, L; Potzel, W; Roth, S; Schönert, S; Sivers, M v; Wawoczny, S; Zöller, A

2014-01-01T23:59:59.000Z

316

Stability and symmetry breaking in a three Higgs-boson doublet model with lepton family symmetry O(2)xZ2  

E-Print Network [OSTI]

With a view on explaining the current neutrino data, an extension of the Standard Model with three Higgs-boson doublets has been proposed. Imposing an O(2) x Z2 family symmetry, a neutrino mixing matrix with theta23 = pi/4 and theta13 = 0 appears in a natural way. Even though these values for the mixing matrix do not follow the recent experimental constraints, they are nevertheless a good approximation. We study the Higgs potential of this model in detail. We apply recent methods which allow for the study of any three-Higgs-boson doublet model. It turns out that for a variety of parameters the potential is stable, has the correct electroweak symmetry-breaking, and has vacuum-expectation values corresponding to the electroweak precision data.

Maniatis, M; Reyes, Carlos M

2015-01-01T23:59:59.000Z

317

Internet of Things Introduction to Internet ofThings (IoT)  

E-Print Network [OSTI]

addresses maintained by IANA were allocated to RIRs on 3 February 2011 Demand is still growing drastically for source port, destination port and length compression Port numbers : 0xF0Bn #12;Effect of header working group Properties Limited memory of devices Constraint energy Heterogeneous routing metrics

Roussos, George

318

Mathematical Analysis of High-Temperature Co-electrolysis of CO2 and O2 Production in a Closed-Loop Atmosphere Revitalization System  

SciTech Connect (OSTI)

NASA has been evaluating two closed-loop atmosphere revitalization architectures based on Sabatier and Bosch carbon dioxide, CO2, reduction technologies. The CO2 and steam, H2O, co-electrolysis process is another option that NASA has investigated. Utilizing recent advances in the fuel cell technology sector, the Idaho National Laboratory, INL, has developed a CO2 and H2O co-electrolysis process to produce oxygen and syngas (carbon monoxide, CO and hydrogen, H2 mixture) for terrestrial (energy production) application. The technology is a combined process that involves steam electrolysis, CO2 electrolysis, and the reverse water gas shift (RWGS) reaction. A number of process models have been developed and analyzed to determine the theoretical power required to recover oxygen, O2, in each case. These models include the current Sabatier and Bosch technologies and combinations of those processes with high-temperature co-electrolysis. The cases of constant CO2 supply and constant O2 production were evaluated. In addition, a process model of the hydrogenation process with co-electrolysis was developed and compared. Sabatier processes require the least amount of energy input per kg of oxygen produced. If co-electrolysis replaces solid polymer electrolyte (SPE) electrolysis within the Sabatier architecture, the power requirement is reduced by over 10%, but only if heat recuperation is used. Sabatier processes, however, require external water to achieve the lower power results. Under conditions of constant incoming carbon dioxide flow, the Sabatier architectures require more power than the other architectures. The Bosch, Boudouard with co-electrolysis, and the hydrogenation with co-electrolysis processes require little or no external water. The Bosch and hydrogenation processes produce water within their reactors, which aids in reducing the power requirement for electrolysis. The Boudouard with co-electrolysis process has a higher electrolysis power requirement because carbon dioxide is split instead of water, which has a lower heat of formation. Hydrogenation with co-electrolysis offers the best overall power performance for two reasons: it requires no external water, and it produces its own water, which reduces the power requirement for co-electrolysis.

Michael G. McKellar; Manohar S. Sohal; Lila Mulloth; Bernadette Luna; Morgan B. Abney

2010-03-01T23:59:59.000Z

319

Stereo-Active Lone-Pair Control on the Ferromagnetic Behavior in VO(SeO2OH)2:A new acentric ferromagnetic material  

SciTech Connect (OSTI)

A new acentric ferromagnetic material, VO(SeO{sub 2}OH){sub 2}, has been synthesized and characterized by single crystal X-ray diffraction, second harmonic generation (SHG), and magnetization measurements. The crystal structure of VO(SeO{sub 2}OH){sub 2} consists of linear chains of corner-shared V{sup 4+}O{sub 6} octahedra that are connected by SeO{sub 2}OH groups. The material exhibits a weak SHG efficiency, comparable to {alpha}-SiO{sub 2}, and a ferromagnetic transition (T{sub C}) at 2.5 K with a saturated magnetic moment of 1.09 {mu}B per formula unit ({mu}B/FU). The origin of the ferromagnetism is explained by the suppression of the antiferromagnetic superexchange (SE) and supersuper-exchange (SSE) interactions in the intra-chain and inter-chain magnetic interactions, respectively. In addition, using first principles density functional theory (DFT) calculations, we show that the SSE interactions depend on the O(2)-Se{sup 4+}-O(3) angle. As we demonstrate, the stereoactive lone-pair on Se{sup 4+} is the driving force for the inter-chain ferromagnetic interactions.

Kim, Sang-Hwan [University of Houston, Houston; Yeon, J [University of Houston, Houston; Safa-Sefat, Athena [ORNL; Mandrus, David [ORNL; Halasyamani, P Shiv [University of Houston, Houston

2010-01-01T23:59:59.000Z

320

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

SciTech Connect (OSTI)

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.

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

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

X-ray absorption study of the O 2p hole concentration dependence on O stoichiometry in YBa/sub 2/Cu/sub 3/O/sub x/  

SciTech Connect (OSTI)

A detailed x-ray absorption study of the oxygen K edge of YBa/sub 2/Cu/sub 3/O/sub x/ is presented. A preedge peak is observed for all samples with xgreater than or equal to6.4 which we argue to be due to holes in the O 2p band. By comparison to Li/sub x/Ni/sub (1-//sub x//sub )/O the x dependence of the number of O 2p holes in YBa/sub 2/Cu/sub 3/O/sub x/ is determined.

Kuiper, P.; Kruizinga, G.; Ghijsen, J.; Grioni, M.; Weijs, P.J.W.; de Groot, F.M.F.; Sawatzky, G.A.; Verweij, H.; Feiner, L.F.; Petersen, H.; and others

1988-10-01T23:59:59.000Z

322

Negative ion photodetachment spectroscopy of the Al3O2 , Al3O3 , Al4Ox , Al5Ox (x = 35), Al6O5 , and Al7O5 clusters  

E-Print Network [OSTI]

Negative ion photodetachment spectroscopy of the Al3O2 , Al3O3 , Al4Ox , Al5Ox (x = 3­5), Al6O5 , and Al7O5 clusters Giovanni Meloni, Michael J. Ferguson and Daniel M. Neumark Department of Chemistry as an Advance Article on the web 9th September 2003 The Al3O2 , Al3O3 , Al4Ox , Al5Ox (x ¼ 3­5), Al6O5 , and Al7

Neumark, Daniel M.

323

Structural and thermal characterization of CaO-MgO-SiO2-P2O5-CaF2 glasses  

SciTech Connect (OSTI)

The paper presents the influence of varying CaO/MgO ratio on the structure and thermal properties of CaO-MgO-SiO2-P2O5-CaF2 glasses. A series of eight glass compositions in the glass forming region of diopside (CaMgSi2O6) - fluorapatite [Ca5(PO4)3F] - wollastonite (CaSiO3) ternary system have been designed and synthesized by varying diopside/wollastonite ratio in glasses. The as prepared melt-quenched glasses have been characterized for their structure by infrared spectroscopy (FTIR) and magic angle spinning (MAS)-nuclear magnetic resonance (NMR) spectroscopy. Silicon is predominantly present as Q2 (Si) species, while phosphorus tends to coordinate in orthophosphate environment in all the investigated glasses. The change in CaO/MgO ratio had an insignificant affect on the structure of glasses. The thermal sintering and crystallization parameters for the studied glasses have been obtained from differential thermal analysis (DTA) while crystalline phase fractions in the sintered glass-ceramics have been analyzed by X-ray diffraction adjoined with Rietveld refinement. Diopside, fluorapatite, wollastonite and pseudowollastonite have crystallized as the main crystalline phases in all the glass-ceramics with their content varying with respect to variation in CaO/MgO ratio in glasses. Scanning electron microscopy (SEM) has been used to shed light on the microstructure of glass-ceramics. The possible implications of structure and sintering behaviour of glasses on their bioactivity have been discussed.

Kansal, Ishu; Goel, Ashutosh; Tulyaganov, Dilshat U.; Rajagopal, Raghu R.; Ferreira, Jose M.

2012-08-01T23:59:59.000Z

324

Effects of Reduction Temperature and Metal-Support Interactions on the Catalytic Activity of Pt/g-Al2O3 and Pt/TiO2 for the Oxidation of CO in the Presence and Absence of H2.  

SciTech Connect (OSTI)

TiO2- and -Al2O3-supported Pt catalysts were characterized by HRTEM, XPS, EXAFS, and in situ FTIR spectroscopy after activation at various conditions, and their catalytic properties were examined for the oxidation of CO in the absence and presence of H2 (PROX). When {gamma}-Al{sub 2}O{sub 3} was used as the support, the catalytic, electronic, and structural properties of the Pt particles formed were not affected substantially by the pretreatment conditions. In contrast, the surface properties and catalytic activity of Pt/TiO2 were strongly influenced by the pretreatment conditions. In this case, an increase in the reduction temperature led to higher electron density on Pt, altering its chemisorptive properties, weakening the Pt-CO bonds, and increasing its activity for the oxidation of CO. The in situ FTIR data suggest that both the terminal and bridging CO species adsorbed on fully reduced Pt are active for this reaction. The high activity of Pt/TiO2 for the oxidation of CO can also be attributed to the ability of TiO2 to provide or stabilize highly reactive oxygen species at the metal-support interface. However, such species appear to be more reactive toward H{sub 2} than CO. Consequently, Pt/TiO{sub 2} shows substantially lower selectivities toward CO oxidation under PROX conditions than Pt/{gamma}-Al{sub 2}O{sub 3}.

Alexeev,O.; Chin, S.; Engelhard, M.; Ortiz-Soto, L.; Amiridis, M.

2005-01-01T23:59:59.000Z

325

6090 Chem. Commun., 2010, 46, 60906092 This journal is c The Royal Society of Chemistry 2010 Porphyrin sensitized solar cells: TiO2 sensitization with a p-extended  

E-Print Network [OSTI]

been synthesized and successfully applied to dye-sensitized solar cells with a power conversion the conditions employed here. Dye-sensitized solar cells (DSSCs) have attracted much attention as promising Porphyrin sensitized solar cells: TiO2 sensitization with a p-extended porphyrin possessing two anchoring

326

This journal is c The Royal Society of Chemistry 2010 Chem. Commun., 2010, 46, 73497351 7349 Self-assembled Ni/TiO2 nanocomposite anodes synthesized via electroless  

E-Print Network [OSTI]

-assembled Ni/TiO2 nanocomposite anodes synthesized via electroless plating and atomic layer deposition-binding affinity in electroless plating reactions. As a result, self-assembled metallic nanorods can be fabricated advantage of the proposed structure lies in the self-assembly of the viral materials. Nickel- coated TMV can

Larson-Prior, Linda

327

An experimental investigation of the urea-water decomposition and selective catalytic reduction (SCR) of nitric oxides with urea using V2O5-WO3-TiO2 catalyst.  

E-Print Network [OSTI]

) stream. The decomposition experiments were conducted with a number of oxygen (O2) compositions (0, 1, 10, and 15%) over the temperature range of 227oC to 477oC. The study showed ammonia (NH3), carbon-dioxide (CO2) and nitric oxide (NO) as the major...

Johar, Jasmeet Singh

2005-11-01T23:59:59.000Z

328

CO Oxidation on Rh/SiO2/Mo(112) Model Catalysts at Elevated Pressures Sean M. McClure, M. Lundwall, F. Yang, Z. Zhou, and D. W. Goodman*  

E-Print Network [OSTI]

) substrate under UHV conditions, in a contiguous high-pressure reactor cell-UHV surface analysis chamber. CO) and Rh coverage (Rh ) 0.25-10 ML), along with measurements on a Rh(111) single crystal for direct comparison. CO desorption measurements on the Rh/SiO2 films and STM measurements of Rh particles on ultrathin

Goodman, Wayne

329

Stabilizing contributions of sulfur-modified nucleotides: crystal structure of a DNA duplex with 2'-O-[2-(methoxy)ethyl]-2-thiothymidines  

SciTech Connect (OSTI)

Substitution of oxygen atoms by sulfur at various locations in the nucleic acid framework has led to analogs such as the DNA phosphorothioates and 4'-thio RNA. The phosphorothioates are excellent mimics of DNA, exhibit increased resistance to nuclease degradation compared with the natural counterpart, and have been widely used as first-generation antisense nucleic acid analogs for applications in vitro and in vivo. The 4'-thio RNA analog exhibits significantly enhanced RNA affinity compared with RNA, and shows potential for incorporation into siRNAs. 2-Thiouridine (s{sup 2}U) and 5-methyl-2-thiouridine (m{sup 5}s{sup 2}U) are natural nucleotide analogs. s{sup 2}U in tRNA confers greater specificity of codon-anticodon interactions by discriminating more strongly between A and G compared with U. 2-Thio modification preorganizes the ribose and 2'-deoxyribose sugars for a C3'-endo conformation, and stabilizes heteroduplexes composed of modified DNA and complementary RNA. Combination of the 2-thio and sugar 2'-O-modifications has been demonstrated to boost both thermodynamic stability and nuclease resistance. Using the 2'-O-[2-(methoxy)ethyl]-2-thiothymidine (m{sup 5}s{sup 2}Umoe) analog, we have investigated the consequences of the replacement of the 2-oxygen by sulfur for base-pair geometry and duplex conformation. The crystal structure of the A-form DNA duplex with sequence GCGTAT*ACGC (T* = m{sup 5}s{sup 2}Umoe) was determined at high resolution and compared with the structure of the corresponding duplex with T* = m{sup 5}Umoe. Notable changes as a result of the incorporation of sulfur concern the base-pair parameter 'opening', an improvement of stacking in the vicinity of modified nucleotides as measured by base overlap, and a van der Waals interaction between sulfur atoms from adjacent m{sup 5}s{sup 2}Umoe residues in the minor groove. The structural data indicate only minor adjustments in the water structure as a result of the presence of sulfur. The observed small structural perturbations combined with the favorable consequences for pairing stability and nuclease resistance (when combined with 2'-O-modification) render 2-thiouracil-modified RNA a promising candidate for applications in RNAi.

Diop-Frimpong, Benjamin; Prakash, Thazha P.; Rajeev, Kallanthottathil G.; Manoharan, Muthiah; Egli, Martin (Isis Pharm.); (Alnylam Pharm.); (Vanderbilt)

2010-03-05T23:59:59.000Z

330

ZnO-Al2O3 and ZnO-TiO2 Core-Shell Nanowire Dye-Sensitized Solar Cells Matt Law,, Lori E. Greene,, Aleksandra Radenovic, Tevye Kuykendall,,  

E-Print Network [OSTI]

ZnO-Al2O3 and ZnO-TiO2 Core-Shell Nanowire Dye-Sensitized Solar Cells Matt Law,,§ Lori E. Greene the construction and performance of dye-sensitized solar cells (DSCs) based on arrays of ZnO nanowires coated loadings through an increase in nanowire array surface area. Introduction Dye-sensitized solar cells (DSCs

Yang, Peidong

331

Improving high-capacity Li1.2Ni0.15Mn0.55Co0.1O2-based lithium-ion cells by modifiying the positive electrode with alumina  

E-Print Network [OSTI]

and EVs), they must meet a range of stringent criteria: for instance, energy densities high enoughImproving high-capacity Li1.2Ni0.15Mn0.55Co0.1O2-based lithium-ion cells by modifiying the positive-ion Atomic layer deposition Al2O3 Coating Secondary ion mass spectrometry Layered oxide a b s t r a c

Spila, Timothy P.

332

Storage Characteristics of LiNi0.8Co0.1+xMn0.1-xO2 (x = 0, 0.03, and 0.06) Cathode Materials for Lithium Batteries  

E-Print Network [OSTI]

Storage Characteristics of LiNi0.8Co0.1+xMn0.1-xO2 (x = 0, 0.03, and 0.06) Cathode Materials for Lithium Batteries Junho Eom,a Min Gyu Kim,b and Jaephil Choa, *,z a Department of Applied Chemistry for 15 h. Using these powders, their storage charac- teristics upon exposure to air and electrolytes

Cho, Jaephil

333

A Reversible Structural Interconversion Involving [M(H2pdc)2(H2O)2] 2H2O (M Mn, Fe, Co, Ni, Zn, H3pdc 3,5-pyrazoledicarboxylic acid) and the Role  

E-Print Network [OSTI]

A Reversible Structural Interconversion Involving [M(H2pdc)2(H2O)2] ´ 2H2O (M Mn, Fe, Co, Ni, Zn, H3pdc 3,5-pyrazoledicarboxylic acid) and the Role of A Reactive Intermediate [Co(H2pdc)2] Long Pan, Nancy Ching, Xiaoying Huang, and Jing Li*[a] Abstract: A new type of hydrogen bonded networks [M(H2pdc)2

Li, Jing

334

Hydrogen donors in SnO2 studied by infrared spectroscopy and first-principles calculations W. M. Hlaing Oo,1 S. Tabatabaei,1 M. D. McCluskey,1,* J. B. Varley,2 A. Janotti,3 and C. G. Van de Walle3,  

E-Print Network [OSTI]

Hydrogen donors in SnO2 studied by infrared spectroscopy and first-principles calculations W. M; revised manuscript received 8 October 2010; published 3 November 2010 Hydrogen is a potentially important source of n-type conductivity in oxide materials. We have investigated hydrogen in tin oxide SnO2

McCluskey, Matthew

335

Structure and Electrochemistry of LiNi1/3Co1/3-yMyMn1/3O2 (M=Ti, Al, Fe) Positive Electrode Materials  

SciTech Connect (OSTI)

A series of materials based on the LiNi1/3Co1/3-yMyMn1/3O2 (M = Ti,Al,Fe) system has been synthesized and examined structurally and electrochemically. It is found that the changes in electrochemical performance depend highly on the nature of the substituting atom and its effect on the crystal structure. Substitution with small amounts of Ti4+ (y = 1/12) leads to the formation of a high-capacity and high-rate positive electrode material. Iron substituted materials suffer from an increased antisite defect concentration and exhibit lower capacities and poor rate capabilities. Single-phase materials are found for LiNi1/3Co1/3-yAlyMn1/3O2 when y<_ 1/4 and all exhibit decreased capacities when cycled to 4.3 V. However, an increase in rate performance and cycle stability upon aluminum substitution is correlated with an improved lamellar structure.

Wilcox, James; Patoux, Sebastien; Doeff, Marca

2009-01-14T23:59:59.000Z

336

The Impact of Aluminum and Iron Substitution on the Structure and Electrochemistry of Li[Ni0.4Co0.2-yMyMn0.4]O2 Materials  

SciTech Connect (OSTI)

Li[Ni0.4Co0.2-yMyMn0.4]O2 (0<_y<_0.2) (M=Al) and Li[Ni0.4Co0.15Fe0.05Mn0.4]O2 compounds were prepared in order to investigate the effect of replacement of all or part of the cobalt on the structural and electrochemical properties. The impact of substitution on the structure has been examined by both x-ray and neutron diffraction experiments. The incorporation of aluminum has minimal effect on the anti-site defect concentration, but leads to structural changes that affect electrochemical performance. The most important effect is an opening of the lithium slab dimension upon substitution, which results in improved rate performance compared to the parent compound. In contrast, the lithium slab dimension is not affected by iron substitution and no rate enhancement effect is observed. The cycling stability of aluminum containing materials is superior to both the parent material and iron-substituted materials.

WIlcox, James D.; Rodriguez, Efrain E.; Doeff, Marca M.

2009-07-23T23:59:59.000Z

337

Internet of Systems (IoS) - Economic Re-equilibration Catalyzed by Internet of Things (IoT)  

E-Print Network [OSTI]

How will the tapestry of humanity and the ethos of civilization evolve when billions of devices and trillions of sensors with quadrillion end points can connect events in our daily lives to the world around us and monitor ...

Datta, Shoumen

2014-01-01T23:59:59.000Z

338

Concerns over complexity: the Internet of Things (IoT) can seem overly futuristic, complicated, and technological. City leaders are  

E-Print Network [OSTI]

is here today, and it starts with your things--your assets such as buildings, air conditioners, traffic of the latest technologies to reduce costs, they can't afford to rip and replace existing systems and reinvent

Chaudhuri, Surajit

339

Characterization and Electrochemical Performance of SubstitutedLiNi0.4Co0.2-yAlyMn0.4O2 (0<_y<_0.2) Cathode Materials  

SciTech Connect (OSTI)

A complete series of LiNi0.4Co0.2-yAlyMn0.4O2 (0<_y<_0.2) materials have been synthesized and investigated as cathode materials for lithium ion batteries. When cycled between 2.0 and 4.3 V vs. Li/Li+ at a current density of 0.1 mA/cm2, stable capacities of ~;;160 mAh/g for y=0 to ~;;110 mAh/g for y=0.2 are achieved. Upon increasing the current density, it is found that all materials containing aluminum show reduced polarization and improved rate performance. The optimal performance at all current densities was found for the compound with y=0.05. The effect of aluminumsubstitution on the crystal structure of the host is discussed.

Wilcox, James D.; Doeff, Marca M.

2007-11-28T23:59:59.000Z

340

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)

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.

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

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

VOLUME 81, NUMBER 14 P H Y S I C A L R E V I E W L E T T E R S 5 OCTOBER 1998 Structure and Energetics of Water Adsorbed at TiO2 Anatase 101 and 001 Surfaces  

E-Print Network [OSTI]

of TiO2 rutile, that is, in turn, the most stable polymorph of titanium dioxide. However, it is anatase, nondissociative molecular adsorption at fivefold coordinated Ti sites is favored at both low and monolayer coverage. On the (001) surface, for u # 0.5, H2O is adsorbed dissociatively, with an adsorption energy DHH

Selloni, Annabella

342

Direct Observation of Site Specific Molecular Chemisorption of O2 on TiO2  

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: Vegetation Proposed Newcatalyst phasesDataTranslocation of Shewanella Oneidensisthe Size(110). | EMSL

343

Selectivity Changes During Organic Photooxidation on TiO2: Role of O2  

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

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344

Imaging Consecutive Steps of O2 Reaction with Hydroxylated TiO2(110):  

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: Vegetation ProposedUsingFun withconfinementEtching. |Endecaheme c-Type|Iltt:Imaging

345

Transient Mobility of Oxygen Adatoms upon O2 Dissociation on Reduced TiO2  

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 Switched Ferromagnetism in Layered NbS2Topo II: AnTraining andfor a

346

FeO-containing K-Na-rich silicate (`KNSF': SiO2 64.3 wt%, K2O 18.6 wt%, Na2O 12.4 wt%, FeO 4.6 wt%) with a low melting temperature. The experiments at the Australian  

E-Print Network [OSTI]

FeO-containing K-Na-rich silicate (`KNSF': SiO2 64.3 wt%, K2O 18.6 wt%, Na2O 12.4 wt%, FeO 4.6 wt and equilibrated with the FeO- containing K-Na-rich silicate. The silicate material was prepared from a mixture drilled out of the KNSF silicate glass and were inserted into capsules fabricated from the Pd90Fe10 and Pt

Waxman, David

347

Inkjet-Printed Nanotechnology-Enabled Zero-Power Wireless Sensor Nodes for Internet-of-Things (IoT) and  

E-Print Network [OSTI]

Interface for Sensing/Energy Harvesting/storing Nanowire Battery Multi-mode Wireless Interface for Comm. and Energy Harvesting .... .... Wireless Interface for Comm/Sensor/Power Nanowire Energy Harvest ElectronicT) and M2M Applications Manos M. Tentzeris Professor, IEEE Fellow and Distinguished Microwave Lecturer

Tentzeris, Manos

348

Nonasymptotically stable attractors in O(2) mode interactions \\Lambda  

E-Print Network [OSTI]

z August 3, 1993 Abstract Heteroclinic cycles are a natural source of nonasymptotically sta­ ble for a large class of heteroclinic cycles. In particular, we establish the existence of several nonasymp heteroclinic cycles can coexist as nonasymptotically stable attractors. 1 Introduction It is now well

349

MODELING SiO 2 STRESS RELAXATION AND STRESS  

E-Print Network [OSTI]

on oxidation kinetics. Conservation of mass, momentum balance, and the transport equation with the appropriate by the Navier­Stokes equation describing a compressible viscous (Voigt visco­elastic) material. The oxidation, the momentum balance is described by Navier­Stokes equations as: ae( @V @t + (V : r)V ) = @oe @x ; (2) where oe

Dunham, Scott

350

Lab Scale Production of NpO2  

SciTech Connect (OSTI)

The Savannah River Site (SRS) plans to disposition its legacy H-Canyon neptunium to Oak Ridge National Laboratory after converting it to oxide in HB-Line. Neptunium oxide, (NpO{sub 2}) was produced at the Savannah River Technology Center using the anticipated HB-Line flowsheet conditions. The oxide was produced from a neptunium nitrate solution via anion exchange, oxalate precipitation, and calcination at either 600 C or 650 C. The 98 grams of NpO{sub 2} produced in the laboratory should be representative of material produced in HB-Line and is to be used for gas generation testing to support radioactive material transportation safety analysis as part of the neptunium stabilization and disposition program at SRS. Results of each step of the oxide production will be presented.

Duffey, J

2003-08-29T23:59:59.000Z

351

ar xe o2: Topics by E-print Network  

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

stellar decay rates of 128I and only marginally affected by the specific stellar neutron flux. For this reason it represents an important test for He-shell burning in AGB...

352

Decreased Ability to Carry O2 to Tissues Erythrocyte Loss  

E-Print Network [OSTI]

;9/16/2013 9 DREPANOCYTES Sickle Cells, Elongated Crescent Shaped with Pointed Ends ­ Sickle Cell Anemia Mean Cell Volume - MCV Mean Corpuscular Hemoglobin - MCH Mean Corpuscular Hemoglobin Concentration - MCHC Red Cell Distribution Width - RDW MCV MCV (fL) = HCT (L/L)/RBC (x109) x 1000 Normocytic = 80

353

Transient Mobility of Oxygen Adatoms upon O2 Dissociation on...  

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

only at the bridging oxygen vacancies, with one O atom healing a vacancy and other O atom bonding at the neighboring Ti site as an adatom. Majority (81%) of O adatoms are found...

354

Small, Inexpensive Combined NOx Sensor and O2 Sensor  

SciTech Connect (OSTI)

It has been successfully demonstrated in this program that a zirconia multilayer structure with rhodium-based porous electrodes performs well as an amperometric NOx sensor. The sensitivity of the sensor bodies operating at 650 to 700 C is large, with demonstrated current outputs of 14 mA at 500 ppm NOx from sensors with 30 layers. The sensor bodies are small (4.5 x 4.2 x 3.1 mm), rugged, and inexpensive. It is projected the sensor bodies will cost $5 - $10 in production. This program has built on another successful development program for an oxygen sensor based on the same principles and sponsored by DOE. This oxygen sensor is not sensitive to NOx. A significant technical hurdle has been identified and solved. It was found that the 100% Rh electrodes oxidize rapidly at the preferred operating temperatures of 650 - 700 C, and this oxidation is accompanied by a volume change which delaminates the sensors. The problem was solved by using alloys of Rh and Pt. It was found that a 10%/90% Rh/Pt alloy dropped the oxidation rate of the electrodes by orders of magnitude without degrading the NOx sensitivity of the sensors, allowing long-term stable operation at the preferred operating temperatures. Degradation in the sensor output caused by temperature cycling was identified as a change in resistance at the junction between the sensor body and the external leads attached to the sensor body. The degradation was eliminated by providing strong mechanical anchors for the wire and processing the junctions to obtain good electrical bonds. The NOx sensors also detect oxygen and therefore the fully-packaged sensor needs to be enclosed with an oxygen sensor in a small, heated zirconia chamber exposed to test gas through a diffusion plug which limits the flow of gas from the outside. Oxygen is pumped from the interior of the chamber to lower the oxygen content and the combination of measurements from the NOx and oxygen sensors yields the NOx content of the gas. Two types of electronic control units were designed and built. One control unit provides independent constant voltages to the NOx and oxygen sensors and reads the current from them (that is, detects the amount of test gas present). The second controller holds the fully-assembled sensor at the desired operating temperature and controllably pumps excess oxygen from the test chamber. While the development of the sensor body was a complete success, the development of the packaging was only partially successful. All of the basic principles were demonstrated, but the packaging was too complex to optimize the operation within the resources of the program. Thus, no fully-assembled sensors were sent to outside labs for testing of cross-sensitivities, response times, etc. Near the end of the program, Sensata Technologies of Attleboro, MA tested the sensor bodies and confirmed the CeramPhysics measurements as indicated in the following attached letter. Sensata was in the process of designing their own packaging for the sensor and performing cross-sensitivity tests when they stopped all sensor development work due to the automotive industry downturn. Recently Ceramatec Inc. of Salt Lake City has expressed an interest in testing the sensor, and other licensing opportunities are being pursued.

W. N. Lawless; C. F. Clark, Jr.

2008-09-08T23:59:59.000Z

355

Small, Inexpensive Combined NOx and O2 Sensor  

SciTech Connect (OSTI)

It has been successfully demonstrated in this program that a zirconia multilayer structure with rhodium-based porous electrodes performs well as an amperometric NO{sub x} sensor. The sensitivity of the sensor bodies operating at 650 to 700 C is large, with demonstrated current outputs of 14 mA at 500 ppm NO{sub x} from sensors with 30 layers. The sensor bodies are small (4.5 x 4.2 x 3.1 mm), rugged, and inexpensive. It is projected the sensor bodies will cost $5-$10 in production. This program has built on another successful development program for an oxygen sensor based on the same principles and sponsored by DOE. This oxygen sensor is not sensitive to NO{sub x}. A significant technical hurdle has been identified and solved. It was found that the 100% Rh electrodes oxidize rapidly at the preferred operating temperatures of 650-700 C, and this oxidation is accompanied by a volume change which delaminates the sensors. The problem was solved by using alloys of Rh and Pt. It was found that a 10%/90% Rh/Pt alloy dropped the oxidation rate of the electrodes by orders of magnitude without degrading the NO{sub x} sensitivity of the sensors, allowing long-term stable operation at the preferred operating temperatures. Degradation in the sensor output caused by temperature cycling was identified as a change in resistance at the junction between the sensor body and the external leads attached to the sensor body. The degradation was eliminated by providing strong mechanical anchors for the wire and processing the junctions to obtain good electrical bonds. The NO{sub x} sensors also detect oxygen and therefore the fully-packaged sensor needs to be enclosed with an oxygen sensor in a small, heated zirconia chamber exposed to test gas through a diffusion plug which limits the flow of gas from the outside. Oxygen is pumped from the interior of the chamber to lower the oxygen content and the combination of measurements from the NO{sub x} and oxygen sensors yields the NO{sub x} content of the gas. Two types of electronic control units were designed and built. One control unit provides independent constant voltages to the NOx and oxygen sensors and reads the current from them (that is, detects the amount of test gas present). The second controller holds the fully-assembled sensor at the desired operating temperature and controllably pumps excess oxygen from the test chamber. While the development of the sensor body was a complete success, the development of the packaging was only partially successful. All of the basic principles were demonstrated, but the packaging was too complex to optimize the operation within the resources of the program. Thus, no fully-assembled sensors were sent to outside labs for testing of cross-sensitivities, response times, etc. Near the end of the program, Sensata Technologies of Attleboro, MA tested the sensor bodies and confirmed the CeramPhysics measurements as indicated in the following attached letter. Sensata was in the process of designing their own packaging for the sensor and performing cross-sensitivity tests when they stopped all sensor development work due to the automotive industry downturn. Recently Ceramatec Inc. of Salt Lake City has expressed an interest in testing the sensor, and other licensing opportunities are being pursued.

W. Lawless; C. Clark

2008-09-01T23:59:59.000Z

356

Compact Potentiometric O2/NOx Sensor | Department of Energy  

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

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357

Acetaldehyde Photochemistry on TiO2(110). | EMSL  

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

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358

Acetaldehyde photochemistry on TiO2(110). | EMSL  

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

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359

ABSTRACT MATERIALS & METHODS RESULTS (%O2 / %CO2)  

E-Print Network [OSTI]

Institute of Technology, M.S. thesis Growth kinetics of surface-inoculated and internalized E.coli O157:H7 time) was usually observed in low-oxygen compared to high-oxygen package atmosphere · Surface-inoculated and internalized cells did not show different trends when compared in two trials. 5° C High-Oxygen Low-Oxygen 15° C

Heller, Barbara

360

Low Cost TiO2 Nanoparticles - Energy Innovation Portal  

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

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Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Highly-Selective and Reversible O2 Binding in  

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

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362

Photoinduced electron transfer in perylene-TiO2 nanoassemblies  

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363

Silicon (100)/SiO2 by XPS. | EMSL  

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364

Catalytic H2O2 decomposition on palladium surfaces  

E-Print Network [OSTI]

The catalytic decomposition of H?O? at smooth single-crystal and polycrystalline palladium surfaces that had been subjected to various surface modifications has been studied. Monolayer and submonolayer coverages of I, Br and Cl adsorbates were used...

Salinas, S. Adriana

1998-01-01T23:59:59.000Z

365

Catalytic epoxidation of propene with H2O-O2 reactants on Au/TiO2  

SciTech Connect (OSTI)

Au/TiO{sub 2} catalysts form hydroperoxy species from H{sub 2}O-O{sub 2} mixtures at near-ambient temperatures. These species can be used in the selective epoxidation of propene to propylene oxide.

Ojeda, Manuel; Iglesia, Enrique

2008-11-05T23:59:59.000Z

366

Surface modification of Au/TiO2 catalysts by SiO2 via atomic layer deposition  

SciTech Connect (OSTI)

Atomic layer deposition (ALD) was utilized for the surface engineering of metallic nanoparticles to tame their sintering problems and catalytic activities. We chose the surface modification of gold nanocatalysts as an example to demonstrate the concept of this ALD-based approach. Herein, an active Au/TiO{sub 2} catalyst was modified by amorphous SiO{sub 2} via ALD, and the samples were characterized by inductively coupled plasma-optical emission spectrometry (ICP-OES), scanning (SEM-EDX) and transmission electron microscope-energy-dispersive X-ray spectrometry (TEM-EDX), X-ray diffraction (XRD), and thermogravimetry/differential thermogravimetry (TG/DTG), and the catalytic activities in CO oxidation and H{sub 2} oxidation were tested with respect to the pretreatment temperature and SiO{sub 2} content. A significant sintering resistance and changes in catalytic activities were observed. The difference between the SiO{sub 2}/Au/TiO{sub 2} samples prepared by gas-phase ALD and solution-phase chemical grafting was discussed.

Ma, Zhen [ORNL; Brown, Suree [ORNL; Howe, Jane Y [ORNL; Overbury, Steven {Steve} H [ORNL; Dai, Sheng [ORNL

2008-01-01T23:59:59.000Z

367

Reactivity of Au nanoparticles supported over SiO2 and TiO2 studiedby ambient pressure photoelectron spectroscopy  

SciTech Connect (OSTI)

The influence of the metal cluster size and the identity of the support on the reactivity of gold based catalysts have been studied in the CO oxidation reaction. To overcome the structural complexity of the supported catalysts, gold nanoparticles synthesized from colloidal chemistry with precisely controlled size have been used. Those particles were supported over SiO{sub 2} and TiO{sub 2} and their catalytic activity was measured in a flow reactor. The reaction rate was dependent on the particle size and the support, suggesting two reaction pathways in the CO oxidation reaction. In parallel, ambient pressure photoelectron spectroscopy (APPS) has been performed under reaction conditions using bidimensional model catalysts prepared upon supporting the Au nanoparticles over planar polycrystalline SiO{sub 2} and TiO{sub 2} thin films by means of the Langmuir-Blodgett (LB) technique to mimic the characteristic of the powder samples. In this way, the catalytically active surface was characterized under true reaction conditions, revealing that during CO oxidation gold remains in the metallic state.

Herranz, Tirma; Deng, Xingyi; Cabot, Andreu; Alivisatos, Paul; Liu, Zhi; Soler-Illia, Galo; Salmeron, Miquel

2009-04-15T23:59:59.000Z

368

Measurements and analysis of CO and O2 emissions in CH4/CO2/O2 flames  

E-Print Network [OSTI]

or deep saline aquifiers, or used for enhanced oil recovery (EOR) or enhanced coal bed methane recovery the key tradeoffs associated with optimizing these systems, as well as the dependence of emissions concepts (e.g., Graz [4] or Matiant [5] cycles) and integra- tion with gasification processes for coal

Lieuwen, Timothy C.

369

Interfacial Layer Growth Condition Dependent Carrier Transport Mechanisms in HfO2/SiO2 Gate Stacks  

SciTech Connect (OSTI)

The temperature and field dependent leakage current in HfO{sub 2}/SiO{sub 2} gate stack for in situ steam grown and chemical interfacial layers (ILs) are studied in the temperature range of 20 C to 105 C. Poole-Frenkel mechanism in high field whereas Ohmic conduction in low field region are dominant for both devices. Leakage current decreases whereas both trap energy level ({phi}{sub t}) and activation energy (E{sub a}) increase for chemically grown IL devices. The trap level energy, ({phi}{sub t}) -0.2 eV, indicates that doubly charged oxygen vacancies (V{sup 2-}) are the active electron traps which contribute to the leakage current in these gate stacks.

Sahoo, S. K.; Misra, D.

2012-06-04T23:59:59.000Z

370

Two-Dimensional Polaronic Behavior in the Binary Oxides m-HfO2 and m-ZrO2  

SciTech Connect (OSTI)

We demonstrate that the three-dimensional (3D) binary monoclinic oxides HfO{sub 2} and ZrO{sub 2} exhibit quasi-2D polaron localization and conductivity, which results from a small difference in the coordination of two oxygen sublattices in these materials. The transition between a 2D large polaron into a zero-dimensional small polaron state requires overcoming a small energetic barrier. These results demonstrate how a small asymmetry in the lattice structure can determine the qualitative character of polaron localization and significantly broaden the realm of quasi-2D polaron systems.

McKenna, K. P.; Wolf, M. J.; Shluger, A. L.; Lany, S.; Zunger, A.

2012-03-16T23:59:59.000Z

371

Interfacial Layer Growth Condition Dependent Electrical Conduction in HfO2/SiO2 Heterostructured Thin Films  

SciTech Connect (OSTI)

The electrical conduction mechanism contributing to the leakage current at different field regions has been studied in this work. The current-voltage (I-V) measurement of TiN/HfO{sub 2}/SiO{sub 2}/P-Si nMOS capacitor has been taken for two different interfacial layer (SiO{sub 2}) growth conditions such as in situ steam grown (ISSG) and chemical processes. It is observed that Poole-Frenkel mechanism is the dominant conduction mechanism in high field region whereas Ohmic conduction is dominant in the low field region. Also it is seen that the gate leakage current is reduced for the devices having chemically grown interfacial layer compared to that of ISSG devices. Both trap energy level ({phi}{sub t}) and activation energy (E{sub a}) increase in the chemically grown interfacial layer devices for the Poole-Frenkel and Ohmic conduction mechanisms respectively in comparison to ISSG devices. Trap energy level ({phi}{sub t}) of {approx} 0.2 eV, obtained from Poole-Frenkel mechanism indicates that the doubly ionized oxygen vacancies (V{sup 2-}) are the active defects and are contributing to the leakage current in these devices.

Sahoo, S. K.; Misra, D.

2012-01-01T23:59:59.000Z

372

TiO2-based sensor arrays modeled with nonlinear regression analysis for simultaneously determining CO and O2  

E-Print Network [OSTI]

; Combustion exhaust monitoring; Emissions monitoring 1. Introduction High temperature combustion processes require the com- plete conversion of hydrocarbons to H2O and CO2 for maximum efficiency [1]. These processes are done with a controlled amount of fuel and air to maximize output and minimize emissions [1

Dutta, Prabir K.

373

Large area direct nanoimprinting of SiO2 TiO2 gel gratings for optical applications  

E-Print Network [OSTI]

have been known as an economical and quick way to obtain artificial ceramics with engineered properties optical lithography. After exposure, development, electron- beam evaporation of chromium Cr , and lift off

374

Experimental: Sample Preparation TiO2 compact (TiO2comp) anatase films (0.1  

E-Print Network [OSTI]

) solar cells by an embossing technique to increase light harvesting and electron percolation.biancardo@risoe.dk Working principle of ETA solar cells: light irradiation (1) produce excitation (2) of the absorber (Abs 20 kgcm-2). Experimental: Device Testing Sun simulation was provided by a solar simulator KHS Solar

375

Power Burst Facility: U(18)O2-CaO-ZrO2 Fuel Rods in Water  

SciTech Connect (OSTI)

The Power Burst Facility (PBF) reactor operated from 1972 to 1985 on the SPERT Area I of the Idaho National Laboratory, then known as Nuclear Reactor Test Station. PBF was designed to provide experimental data to aid in defining thresholds for and modes of failure under postulated accident conditions. PBF reactor startup testing began in 1972. This evaluation focuses on two operational loading tests, chronologically numbered 1 and 2, published in a startup-test report in 1974 [1]. Data for these tests was used by one of the authors to validate a MCNP model for criticality safety purposes [2]. Although specific references to original documents are kept in the text, all the reactor parameters and test specific data presented here was adapted from that report. The tests were performed with operational fuel loadings, a stainless steel in-pile tube (IPT) mockup, a neutron source, four pulse chambers, two fission chambers, and one ion chamber. The reactor's four transition rods (TRs) and control rods (CRs) were present but TR boron was completely withdrawn below the core and CR boron was partially withdrawn above the core. Test configurations differ primarily in the number of shim rods, and consequently the number of fuel rods included in the core. The critical condition was approached by incrementally and uniformly withdrawing CR boron from the core. Based on the analysis of the experimental data and numerical calculations, both experiments are considered acceptable as criticality safety benchmarks.

Jose Ignacio Marquez Damian; Alexis Weir; Valeria L. Putnam; John D. Bess

2009-09-01T23:59:59.000Z

376

Physisorption of N2, O2, and CO on Fully Oxidized TiO2(110). | EMSL  

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377

Hole Trapping at Surfaces of mZrO2 and mHfO2 Nanocrystals. | EMSL  

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378

Two-Dimensional Polaronic Behavior in the Binary Oxides m-HfO2 and m-ZrO2.  

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379

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

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380

Stability and Migration of Charged Oxygen Interstitials in ThO2 and CeO2. |  

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Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

1.25 mM NaH2PO4, 1 mM CaCl2, 1 mM MgCl2, 26 mM NaHCO3 and 10 mM dextrose, bubbled with 95% O2/5% CO2 (pH 7.4). Slices (300400 mm thick) were prepared with a  

E-Print Network [OSTI]

1.25 mM NaH2PO4, 1 mM CaCl2, 1 mM MgCl2, 26 mM NaHCO3 and 10 mM dextrose, bubbled with 95% O2/5% CO cerebrospinal fluid (ACSF: 124 mM NaCl, 2 mM KCl, 1.5 mM MgSO4, 1.25 mM NaH2PO4, 2.5 mM CaCl2, 26 mM NaHCO3, 10

Zuker, Charles

382

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

SciTech Connect (OSTI)

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.

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

2011-11-24T23:59:59.000Z

383

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

SciTech Connect (OSTI)

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}.

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

2006-01-01T23:59:59.000Z

384

Systematic Modulation of Quantum (Electron) Tunneling Behavior by Atomic Layer Deposition on Nanoparticulate SnO2 and TiO2  

E-Print Network [OSTI]

, such as the nanoparticulate and semiconducting photoanode of a dye-sensitized solar cell (DSC), with a layer of a second metal. Hupp*,, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center

385

Growth, microstructure and electrical properties of sputter-deposited hafnium oxide (HfO2) thin films grown using HfO2 ceramic target  

SciTech Connect (OSTI)

Hafnium oxide (HfO?) thin films have been made by radio-frequency (rf) magnetron-sputtering onto Si(100) substrates under varying growth temperature (Ts). HfO? ceramic target has been employed for sputtering while varying the Ts from room temperature to 500?C during deposition. The effect of Ts on the growth and microstructure of deposited HfO? films has been studied using grazing incidence x-ray diffraction (GIXRD), X-ray photoelectron spectroscopy (XPS), and high-resolution scanning electron microscopy (HR-SEM) coupled with energy dispersive x-ray spectrometry (EDS). The results indicate that the effect of Ts is significant on the growth, surface and interface structure, morphology and chemical composition of the HfO? films. Structural characterization indicates that the HfO? films grown at Ts<200 ?C are amorphous while films grown at Ts>200 ?C are nanocrystalline. An amorphous-to-crystalline transition occurs at Ts=200 ?C. Nanocrystalline HfO? films crystallized in a monoclinic structure with a (-111) orientation. XPS measurements indicated the high surface-chemical quality and stoichiometric nature of the grown HfO? films. An interface layer (IL) formation occurs due to reaction at the HfO?-Si interface for HfO? films deposited at Ts>200 ?C. The thickness of IL increases with increasing Ts. XPS and EDS at the HfO?-Si cross-section indicate the IL is a (Hf, Si)-O compound. The electrical characterization using capacitance-voltage measurements indicate that the dielectric constant decreases from 25 to 16 with increasing Ts.

Aguirre, B.; Vemuri, R. S.; Zubia, David; Engelhard, Mark H.; Shutthanandan, V.; Kamala Bharathi, K.; Ramana, Chintalapalle V.

2011-01-01T23:59:59.000Z

386

Efficient preparation of nanocrystalline anatase TiO2 and V/TiO2 thin layers using microwave drying and/or microwave calcination technique  

E-Print Network [OSTI]

be significantly improved and extended if microwave energy is employed during the drying and/or calcination step many important applications, including, among others, dye-sensitized solar cells [1] or photocatalytic of the hydrolysis rate [6]. Sol­gel method has several advantages such as low processing temperature, homogeneity

Cirkva, Vladimir

387

The Nature of the Surface Species Formed on Au/TiO2 during the Reaction of H2 and O2: An Inelastic Neutron Scattering Study  

E-Print Network [OSTI]

Neutron Scattering Study Chinta Sivadinarayana, Tushar V. Choudhary, Luke L. Daemen, Juergen Eckert of obvious interest for understanding this process. Vibrational spectroscopy by inelastic neutron scattering

Goodman, Wayne

388

2+/TiO2-Codoped Zeolites: Synthesis, Characterization, and the Role of TiO2 in Electron Transfer Photocatalysis  

E-Print Network [OSTI]

consist of zeolite Y-encapsulated Ru(bpy)3 2+ (bpy ) 2,2- bipyridine) sensitizers in close proximity to Ti are necessary to improve cost efficiency, to utilize solar energy, and to avoid the formation of highly toxic

Turro, Claudia

389

X-ray reflection spectroscopy of the HfO2/SiO2/Si system in the region of the O-K absorption edge  

E-Print Network [OSTI]

profilometry of the sample. By using the Kramers-Kronig analysis, the reflection spectra are transformed on a top of a Si substrate is prepared. The Si substrate is a silicon single-crystal of p-type. The film is prepared by a dry

Boyer, Edmond

390

DNA Cleavage by Photogenerated Rh2(O2CCH3)4(H2O)2 Patty K.-L. Fu, Patricia M. Bradley, and Claudia Turro*  

E-Print Network [OSTI]

,8-anthraquinone disulfonate (AQ2-) was utilized,17 whose negative charge precludes its binding to the polyanionic

Turro, Claudia

391

Water adsorption on O(2x2)/Ru(0001) from STM experiments andfirst-principles calculations  

SciTech Connect (OSTI)

We present a combined theoretical and experimental study of water adsorption on Ru(0001) pre-covered with 0.25 monolayers (ML) of oxygen forming a (2 x 2) structure. Several structures were analyzed by means of Density Functional Theory calculations for which STM simulations were performed and compared with experimental data. Up to 0.25 monolayers the molecules bind to the exposed Ru atoms of the 2 x 2 unit cell via the lone pair orbitals. The molecular plane is almost parallel to the surface with its H atoms pointing towards the chemisorbed O atoms of the 2 x 2 unit cell forming hydrogen bonds. The existence of these additional hydrogen bonds increases the adsorption energy of the water molecule to approximately 616 meV, which is {approx}220 meV more stable than on the clean Ru(0001) surface with a similar configuration. The binding energy shows only a weak dependence on water coverage, with a shallow minimum for a row structure at 0.125 ML. This is consistent with the STM experiments that show a tendency of the molecules to form linear rows at intermediate coverage. Our calculations also suggest the possible formation of water dimers near 0.25 ML.

Cabrera-Sanfelix, P.; Sanchez-Portal, D.; Mugarza, A.; Shimizu,T.K.; Salmeron, M.; Arnau, A.

2007-10-15T23:59:59.000Z

392

Economic Analysis for Conceptual Design of Supercritical O2-Based PC Boiler  

SciTech Connect (OSTI)

This report determines the capital and operating costs of two different oxygen-based, pulverized coal-fired (PC) power plants and compares their economics to that of a comparable, air-based PC plant. Rather than combust their coal with air, the oxygen-based plants use oxygen to facilitate capture/removal of the plant CO{sub 2} for transport by pipeline to a sequestering site. To provide a consistent comparison of technologies, all three plants analyzed herein operate with the same coal (Illinois No 6), the same site conditions, and the same supercritical pressure steam turbine (459 MWe). In the first oxygen-based plant, the pulverized coal-fired boiler operates with oxygen supplied by a conventional, cryogenic air separation unit, whereas, in the second oxygen-based plant, the oxygen is supplied by an oxygen ion transport membrane. In both oxygen-based plants a portion of the boiler exhaust gas, which is primarily CO{sub 2}, is recirculated back to the boiler to control the combustion temperature, and the balance of the flue gas undergoes drying and compression to pipeline pressure; for consistency, both plants operate with similar combustion temperatures and utilize the same CO{sub 2} processing technologies. The capital and operating costs of the pulverized coal-fired boilers required by the three different plants were estimated by Foster Wheeler and the balance of plant costs were budget priced using published data together with vendor supplied quotations. The cost of electricity produced by each of the plants was determined and oxygen-based plant CO{sub 2} mitigation costs were calculated and compared to each other as well as to values published for some alternative CO{sub 2} capture technologies.

Andrew Seltzer; Archie Robertson

2006-09-01T23:59:59.000Z

393

Evaluation of the Au Size Effect: CO Oxidation Catalyzed by Au/TiO2  

SciTech Connect (OSTI)

The size dependence of activity in gold catalysts was examined. Extended X-ray absorption fine structure was used to determine mean particle size, and a flow reactor was used to assess activity of the catalysts for CO oxidation as a function of temperature. A sequence of calcination steps was used to systematically increase the mean Au particle size while repeated measurements of the activity were conducted. In this way the size dependence could be obtained in a single catalyst to avoid differences due to variations in support, synthesis conditions, Au loading, or incidental impurities. Two Au catalysts with different Au loadings were prepared on TiO{sub 2} by deposition precipitation and used for the measurements. For Au particles with mean particle size, d, in the range of 2-10 nm, the measured TOF at 298 K varies as d{sup -1.7{+-}0.2} and d{sup -0.9{+-}0.2} for the 7.2 and 4.5 wt% Au/TiO{sub 2} (P25) catalysts, respectively. Variation between samples emphasizes the conclusion that the activity is sensitive to many factors that may mask the true structure dependence. It is concluded that the observed decrease in activity with increasing particle size beyond 2 nm is controlled by the population of low-coordinate sites, rather than by size-dependent changes in overall electronic structure of the nanoparticle. No evidence was found for maximum activity for small particle sizes, although arguments are offered for why such a maximum was expected but was not observed.

Overbury,S.; Schwartz, V.; Mullins, D.; Yan, W.; Dai, S.

2006-01-01T23:59:59.000Z

394

Surface Science Perspectives Dispersed Au atoms, supported on TiO2(110)  

E-Print Network [OSTI]

activation energy for the oxidation of carbon monoxide? Many factors could con- tribute. For example); Catalysis; Gold; Titanium oxide; Surface defects At the end of the 1980s Haruta and coworkers made

Diebold, Ulrike

395

Tracking a defined route for O2 migration in a dioxygen-activating diiron enzyme  

E-Print Network [OSTI]

For numerous enzymes reactive toward small gaseous compounds, growing evidence indicates that these substrates diffuse into active site pockets through defined pathways in the protein matrix. Toluene/o-xylene monooxygenase ...

Song, Woon Ju

396

SiO2 Fracture: Chemomechanics with a Machine-Learning Hybrid...  

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

Snapshot from a simulation of subcritical stress corrosion cracking in silica in a wet environment, of the kind that will be carried out at the quantum mechanical level during this...

397

Mechanism of O2 Activation and Methanol Production by (Di(2-pyridyl)methanesulfonate)PtII  

E-Print Network [OSTI]

conversion of methane to methanol at low temper- ature is crucial for transportation of shale gas produced it to methanol and its derivatives. In this system, the kinetics of the oxidation of Pt(II) is important because activation and selective conversion of Pt(II) monomethyl complex (dpms)PtII Me(OH2) to its monomethyl Pt

Goddard III, William A.

398

Effect of O2 adsorption on electron scattering at Cu,,001... surfaces J. S. Chawla,1  

E-Print Network [OSTI]

solar conversion,19 and may become important for gas sensing applications. The increase­5 and adsorption of for- eign atoms and molecules,5­9 and have gained interest due to their importance and oxidation of Cu sur- faces is particularly important to microelectronics and nano- electronics

Gall, Daniel

399

Mechanism of Methane Chemical Looping Combustion with Hematite Promoted with CeO2  

SciTech Connect (OSTI)

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.

Miller, Duane D.; Siriwardane, Ranjani

2013-08-01T23:59:59.000Z

400

Visible Light Photocatalysis with Platinized Rutile TiO2 for Aqueous Organic Oxidation  

E-Print Network [OSTI]

chemicals containing different functional groups (formic acid, salicylic acid, 4-chlorophenol, 2,4,6-trichlorophenol, diethyl phosphoramidate) were selected for photooxidationtestswith 1/2 wt about 4% of the solar spectrum, the need to develop photocatalysts with smaller band gaps is paramount.6

Boolchand, Punit

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Oriented conductive oxide electrodes on SiO2/Si and glass  

DOE Patents [OSTI]

A thin film structure is provided including a silicon substrate with a layer of silicon dioxide on a surface thereof, and a layer of cubic oxide material deposited upon the layer of silicon dioxide by ion-beam-assisted-deposition, said layer of cubic oxide material characterized as biaxially oriented. Preferably, the cubic oxide material is yttria-stabilized zirconia. Additional thin layers of biaxially oriented ruthenium oxide or lanthanum strontium cobalt oxide are deposited upon the layer of yttria-stabilized zirconia. An intermediate layer of cerium oxide is employed between the yttria-stabilized zirconia layer and the lanthanum strontium cobalt oxide layer. Also, a layer of barium strontium titanium oxide can be upon the layer of biaxially oriented ruthenium oxide or lanthanum strontium cobalt oxide. Also, a method of forming such thin film structures, including a low temperature deposition of a layer of a biaxially oriented cubic oxide material upon the silicon dioxide surface of a silicon dioxide/silicon substrate is provided.

Jia, Quanxi (Los Alamos, NM); Arendt, Paul N. (Los Alamos, NM)

2001-01-01T23:59:59.000Z

402

Tuning the Optical Properties of Mesoporous TiO2 Films by Nanoscale Engineering  

SciTech Connect (OSTI)

Introducing mesoscale pores into spincoated titanium dioxide films, prepared by spincoating different sol-gel precursor solutions on silicon substrates and subsequent annealing at 350 C, 400 C or 450 C, respectively, affects several optical properties of the material. The change in refractive index observed for different mesoporous anatase films directly correlates with changes in pore size, but is also in a more complex manner influenced by the film thickness and the density of pores within the films. Additionally, the band gap of the films is blueshifted by the stress the introduction of pores exerts on the inorganic matrix. The differently sized pores were templated by Pluronic{reg_sign} block copolymers in the solgel solutions and tuned by employing different annealing temperatures for the film preparation. This study focused on elucidating the effect different templating materials (F127 and P123) have on the pore size of the final mesoporous titania film, and on understanding the relation of varying polymer concentration (taking P123 as an example) in the sol-gel solution to the pore concentration and size in the resultant titania film. Titania thin film samples or corresponding titanium dioxide powders were characterized by X-ray diffraction, nitrogen adsorption, ellipsometery, UV/Vis spectrometry and other techniques to understand the interplay between mesoporosity and optical properties.

Schwenzer, Birgit; Wang, Liang; Swensen, James S.; Padmaperuma, Asanga B.; Silverman, Gary; Korotkov, Roman; Gaspar, Daniel J.

2012-07-03T23:59:59.000Z

403

RATE CONSTANT FOR THE REACTION NO2 + O->NO + O2  

E-Print Network [OSTI]

flow of reactants so that nitrogen dioxide had a chance toin situ analysis for nitrogen dioxide. It appears possiblerate of 0( PJ) with nitrogen dioxide This reaction has been

Magnotta, Frank

2012-01-01T23:59:59.000Z

404

Mechanism of stress relaxation in Ge nanocrystals embedded in SiO2  

SciTech Connect (OSTI)

Ion-beam-synthesized {sup 74}Ge nanocrystals embedded in an amorphous silica matrix exhibit large compressive stresses in the as-grown state. The compressive stress is determined quantitatively by evaluating the Raman line shift referenced to the line position of free-standing nanocrystals. Post-growth thermal treatments lead to stress reduction. The stress relief process is shown to be governed by the diffusive flux of matrix atoms away from the local nanocrystal growth region. A theoretical model that quantitatively describes this process is presented.

Sharp, I.D.; Yi, D.O.; Xu, Q.; Liao, C.Y.; Beeman, J.W.; Liliental-Weber, Z.; Yu, K.M.; Zakharov, D.N.; Ager III, J.W.; Chrzan, D.C.; Haller, E.E.

2004-08-30T23:59:59.000Z

405

Electrochemically controlled transport of lithium through ultrathin SiO2 Nava Ariel,a  

E-Print Network [OSTI]

integrated circuit IC requires the development of a thin-film solid-state battery compatible with silicon IC supply, onto the silicon chip. This requires the development of a thin-film solid-state battery candidate in a solid-state power cell integrated on silicon. Other components of the thin-film cell

406

A Viscous Compressible Model for Stress Generation/Relaxation in SiO 2  

E-Print Network [OSTI]

, and the transport equation along with appropriate bound­ ary conditions have been formulated. The material law used for the oxide is that of a compressible viscous material applied via mass and momentum balance (Navier behavior of silicon dioxide and its effect on oxidation kinetics. Conservation of mass, momentum balance

Dunham, Scott

407

Low Temperature Autoignition of C8H16O2 Ethyl and Methyl Esters...  

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

500 600 700 800 900 1000 300 320 340 360 380 400 420 Apparent Heat Release Rate (kJDeg) Bulk Cylinder Gas Temperature (K) CA (Deg) -0.01 0.01 0.03 0.05 0.07 0.09 0.11 50 250 450...

408

Synthesis and Characterization of MnO2-Based Mixed Oxides as Supercapacitors  

E-Print Network [OSTI]

difference, the stability over large potential range is considered to be a crucial factor for super- capacitors. In this study an attempt was made to synthesize at ambient tem- perature new mixed oxides based

Popov, Branko N.

409

Exciton-like trap states limit electron mobility in TiO2 nanotubes  

E-Print Network [OSTI]

technology for next-generation solar cells4,14,15 , including dye-sensitized solar cells (DSSCs)4 for solar cells and solar fuel pro- duction1,2. Compared to sintered nanoparticle films, oriented lead to improved electron transport in titania nanotubes and significantly better solar cell

410

Chemical states and electronic structure of a HfO(-2) / Ge(001) interface  

SciTech Connect (OSTI)

We report the chemical bonding structure and valence band alignment at the HfO{sub 2}/Ge (001) interface by systematically probing various core level spectra as well as valence band spectra using soft x-rays at the Stanford Synchrotron Radiation Laboratory. We investigated the chemical bonding changes as a function of depth through the dielectric stack by taking a series of synchrotron photoemission spectra as we etched through the HfO{sub 2} film using a dilute HF-solution. We found that a very non-stoichiometric GeO{sub x} layer exists at the HfO{sub 2}/Ge interface. The valence band spectra near the Fermi level in each different film structure were carefully analyzed, and as a result, the valence band offset between Ge and GeO{sub x} was determined to be {Delta}E{sub v} (Ge-GeO{sub x}) = 2.2 {+-} 0.15 eV, and that between Ge and HfO{sub 2}, {Delta}E{sub v} (Ge-HfO{sub 2}) = 2.7 {+-} 0.15 eV.

Seo, Kang-ill; McIntyre, Paul C.; /Stanford U., Materials Sci. Dept.; Sun, Shiyu; Lee, Dong-Ick; Pianetta, Piero; /SLAC, SSRL; Saraswat, Krishna C.; /Stanford U., Elect.

2005-05-04T23:59:59.000Z

411

PHOTOVOLTAIC PROPERTIES OF METAL-MEROCYANINE-TiO2 SANDWICH CELLS  

E-Print Network [OSTI]

used in making the photovoltaic cells. Figure 3. Diagram ofused in making the photovoltaic cells. HO HO ,5 di -t rt.organic compounds in photovoltaic cells. It lies more in the

Skotheim, Terje Asbjorn

2011-01-01T23:59:59.000Z

412

Experiment on TiO2/AC Photocatalysis Technique to Eliminate Toluene in Air Conditioning Systems  

E-Print Network [OSTI]

at present, the article proposes that new-type purification technique and hopes to promote the upgrading of the product about purification. 2. INTRODUTION ON THE STRURE AND STUFF OF ACTIVE CARBON AND NANO- TITANIUM DIOXIDE PHOTOCATALYSIS PURIFICATION... WEB What is called active carbon and nano-titanium dioxide photocatalysis technique is to utilize the method of compounding active carbon and nanometer photocatalyst to firstly form absorption layer on supporting body surface by gluing, which...

Hu, Y.; Feng, G.; Yuan, Q.

2006-01-01T23:59:59.000Z

413

Formation of Radioactive Citrulline During Photosynthetic C14O2-Fixation by Blue-Green Algae  

E-Print Network [OSTI]

ClTRULLlNE BY BLUE-GREEN ALGAE TWO-WEEK LOAN COPY This is aC~~O~-FIXATION BLUE-GREEN ALGAE Pekka Linko, 0. Holm-Hansen,C~~O~-FIXATION BLUE-GREEN ALGAE BY Pelcka Linlc~,'~ Holm-

Linko, Pekka; Holm-Hansen, O.; Bassham, J.A.; Calvin, M.

1956-01-01T23:59:59.000Z

414

PHOTOVOLTAIC PROPERTIES OF METAL-MEROCYANINE-TiO2 SANDWICH CELLS  

E-Print Network [OSTI]

67 3.6 Photovoltaic Action Spectrum . . . . 3.7dye used in making the photovoltaic cells. Figure 3. Diagramused in making the photovoltaic cells. HO HO ,5 di -t rt.

Skotheim, Terje Asbjorn

2011-01-01T23:59:59.000Z

415

High Energy Density Cathode for Lithium Batteries: From LiCoO_(2) to Sulfur  

E-Print Network [OSTI]

addressed, i.e. the safety hazard resulted from the Li dendrite formation on the Li metal anode and the poor cyclability arising from the polysulfides shuttle. Firstly, to overcome the safety issue, this dissertation reported a lithiated Si-S (LSS) battery...

Pu, Xiong

2014-05-29T23:59:59.000Z

416

Photochemical Grafting of Organic Alkenes to Single-Crystal TiO2...  

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

can be initiated by photoelectron emission into the reactant liquid as well as by excitation across the semiconductor bandgap, but the relative importance of these two processes...

417

Lithium/Manganese Dioxide (Li/MnO(2)) Battery Performance Evaluation: Final Report  

SciTech Connect (OSTI)

In February 1997, under the auspices of the Product Realization Program, an initiative to develop performance models for lithium/manganese dioxide-based batteries began. As a part of this initiative, the performance characteristics of the cells under a variety of conditions were determined, both for model development and for model validation. As a direct result of this work, it became apparent that possible Defense Program (DP) uses for batteries based on this cell chemistry existed. A larger effort aimed at mapping the performance envelope of this chemistry was initiated in order to assess the practicality of this cell chemistry, not only for DP applications, but also for other uses. The work performed included an evaluation of the cell performance as a function of a number of variables, including cell size, manufacturer, current, pulse loads, constant current loads, safety, etc. In addition, the development of new evaluation techniques that would apply to any battery system, such as those related to reliability assessments began. This report describes the results of these evaluations.

Ingersoll, D.; Clark, N.H.

1999-04-01T23:59:59.000Z

418

Dopant-driven Nanostructured Loose-Tube SnO2 Architectures: Alternative Electrocatalyst Supports  

E-Print Network [OSTI]

and specific surface area measurements as well as accelerated corrosion tests and electrochemical measurements lithium ion batteries1, 2 , dye-sensitized solar cells3,4 to sensors5 and optoelectronics6 . Recently, Sn the corrosion of conventional carbon support materials. This corrosion leads to consumption of carbon

Boyer, Edmond

419

Mechanism and Optimization of pH Sensing Using SnO2 Nanobelt Field  

E-Print Network [OSTI]

: a linear pH dependence was observed in the linear transport "on" state, while an exponential dependence to the surface protonation/deprotonation on the nanobelt. This study provides several useful guidelines for optimizing the sensor performance for chemical and biomolecular detection. There is significant biomedical

Wang, Zhong L.

420

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

SciTech Connect (OSTI)

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.

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

2014-05-02T23:59:59.000Z

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Roaming in the Dark: Deciphering the Mystery of NO3 --> NO + O2 Photolysis  

E-Print Network [OSTI]

. ............................... 22 11 Example of the symmetrization method of image centering ...................... 23 12 I(r,?) distributions of a crushed, reconstructed (using the POP algorithm), and DC sliced ion image... .......................................................................... 33 16 Example of ion image angular distribution fit using the linear least squares method ........................................................................................... 38 17 Schematic diagram of limiting vector correlation...

Grubb, Michael Patrick

2012-07-16T23:59:59.000Z

422

Controlling Atomic Layer Deposition of TiO2 in Aerogels through Surface Functionalization  

SciTech Connect (OSTI)

This report demonstrates a chemical functionalization method for controlling atomic layer deposition (ALD) of TiO{sub 2} in low-density nanoporous materials. Functionalization of silica aerogel with trimethylsilane is shown to strongly suppress TiO{sub 2} growth via ALD. Subsequent modification of the functionalization through selective removal of the hydrocarbon groups reactivates the aerogel towards TiO{sub 2} deposition. These results demonstrate the potential use of ALD as a selective tool for creating novel nanoporous materials. Nanoporous materials present significant technological advantage for a wide range of applications, including catalysis, energy storage and conversion, nanoelectronics to name just a few (1-4). Hence, there is considerable interest in developing synthetic pathways for the fabrication of nanoporous materials with tailored properties. Aerogels (AGs) are unique low-density, open-cell porous materials consisting of submicrometer pores and ligaments that can be used as a robust material platform for designing novel nanoporous materials. In recent years, a synthetic approach based on ALD on AG templates has emerged as a promising method for the directed growth of nanoporous materials (5-11, 18). This approach has been used successfully to prepare millimeter-sized high aspect ratio aerogels coated uniformly with zinc oxide (ZnO), tungsten (W) and alumina (Al{sub 2}O{sub 3}) (10, 11). The ALD process utilizes two sequential, self-limiting surface reactions resulting in a layer-by-layer growth mode. The self limiting nature of the surface reactions makes ALD a particularly suitable technique for uniform deposition onto high aspect ratio porous substrates. Additionally, chemical specificity of the surface reactions in ALD enables one to control the deposition process through selective functionalization of the substrate surface. In fact the functionalization of planar substrates such as silicon wafers with organosilane groups (R{sub n}SiX{sub 4-n} (n = 1-3)) has been shown to deactivate the substrate towards ZrO{sub 2}, HfO{sub 2}, ZnO, and TiO{sub 2} ALD processes (12-16). A possible mechanism for the deactivation effect is the blocking of surface functional groups, such as hydroxyl (OH) moieties, which serve as chemisorption sites for the ALD precursors and hence are essential for nucleating the deposition process. Henceforth, we shall refer to these surface functional groups as nucleation sites for the ALD process.

Ghosal, S; Baumann, T F; King, J S; Kucheyev, S; Wang, Y; Worsley, M A; Biener, J; Bent, S F; Hamza, A V

2009-03-09T23:59:59.000Z

423

Design of a MidO2PL Database Replication Protocol in a Middleware Architecture  

E-Print Network [OSTI]

Management System (DBMS) internals. However, it introduces an additional overhead that may lead to poor by the modification of the DBMS internals, such as [CL91, BHG87, KPA+03]. This approach presents good performance but lacks of compatibility between several DBMS vendors. The alternative approach is to deploy a middleware

Muñoz, Francesc

424

Adhesion of sodium dodecyl sulfate surfactant monolayers with TiO2 (rutile and anatase) surfaces  

SciTech Connect (OSTI)

Surfactants are widely used as templates to control the nucleation and growth of nanostructured metal oxides such as titania. To gain insight into the origin of surfactant-titania interactions responsible for polymorph and orientation selection, we simulate the self-assembly of an anionic surfactant monolayer on various low-index titania surfaces and for a range of densities. We characterize the binding in each case and compute the adhesion energies, finding anatase (100) and rutile (110) to be the strongest-binding surfaces. The sodium counterions in the monolayer are found to dominate the adhesion. It is also observed that the assembly is directed predominantly by surface-monolayer electrostatic complementarity.

Darkins, Robert; Sushko, Maria L.; Liu, Jun; Duffy, Dorothy M.

2013-09-17T23:59:59.000Z

425

Characterization of Pt/SiO2 Model Catalysts at UHV and Near Atmospheric Pressures  

E-Print Network [OSTI]

catalyst samples, prepared under UHV conditions in a contiguous high pressure reactor cell surface analysis with measurements on a Pt(110) single crystal for direct com- parison. CO desorption measurements and STM measure, turnover frequency (TOF, product molecules produced/site/s) is a standard metric used for comparison

Goodman, Wayne

426

Absorption Properties of Hybrid SnO2 Nanocrystal-Carbon Nanotube Structures  

E-Print Network [OSTI]

applications such as in gas sensors,1,2 solar energy conversion devices,3 and transparent electrodes.4 for chemical sensors,27 biosensors,28 nanoelectronics,29 photovoltaic cells,30 fuel cells,31 and hydrogen stor

Chen, Junhong

427

Acidic dissolution behavior of U containing ZrO2–MgO ceramics  

SciTech Connect (OSTI)

This study explores the possibility of dissolving zirconia-magnesia inert matrix fuel containing uranium oxide as a fissile material and plutonium homolog and erbium oxide as a burnable poison with nitric and sulfuric acid as a potential first step in a reprocessing scheme. The progress of the dissolution is followed by monitoring the amount of material in solution by inductively coupled plasma-atomic emission spectroscopy, assessing the speciation of the material by time resolved laser fluorescence spectroscopy, and determining and quantifying the crystalline phases present in the remaining residue by X-ray diffraction. This study has shown a linear incongruent dissolution of the cubic zirconia phase in concentrated nitric acid under certain chemical compositions, while the magnesium oxide phase is completely soluble. In sulfuric acid uranium, erbium, and magnesium are soluble to different extents while zirconium forms a colloidal suspension that conglomerates and settles out of solution. The feasibility of the dissolution of zirconia-magnesia inert matrix fuel with nitric and sulfuric acid for reprocessing is discussed.

Kiel Holliday; Nicholas Smith; Thomas Hartmann; Gary Cerefice; Ken Czerwinski

2011-11-01T23:59:59.000Z

428

Assessment of existing H2/O2 chemical reaction mechanisms at reheat gas turbine conditions  

E-Print Network [OSTI]

This paper provides detailed comparisons of chemical reaction mechanisms of H2 applicable at high preheat temperatures and pressures relevant to gas turbine and particularly Alstom's reheat gas turbine conditions. It is shown that the available reaction mechanisms exhibit large differences in several important elementary reaction coefficients. The reaction mechanisms are assessed by comparing ignition delay and laminar flame speed results obtained from CHEMKIN with available data, however, the amount of data at these conditions is scarce and a recommended candidate among the mechanisms can presently not be selected. Generally, the results with the GRI-Mech and Leeds mechanisms deviate from the Davis, Li, O'Conaire, Konnov and San Diego mechanisms, but there are also significant deviations between the latter five mechanisms that altogether are better adapted to hydrogen. The differences in ignition delay times between the dedicated hydrogen mechanisms (O'Conaire, Li and Konnov) range from approximately a maxim...

Weydahl, Torleif; Seljeskog, Morten; Haugen, Nils Erland L

2011-01-01T23:59:59.000Z

429

A novel "gelsol" strategy to synthesize TiO2 nanorod combining reduced graphene oxide composites  

E-Print Network [OSTI]

Graphene oxide Titanium dioxide Nanostructure Semiconductors Nanorods a b s t r a c t In this studyH value benefits the deprotonation of TEOA for adsorption to the stationary nuclei. Therefore triethanolamine (TEOA) with titanium (IV) isopropoxide (TIPO) at a molar ratio of [TEOA]:[TIPO]¼2:1, was added

Guo, John Zhanhu

430

Conformal MnO2 Electrodeposition Onto Defect-Free Graphitic Carbons  

E-Print Network [OSTI]

electrochemical testing of these composite electrodes is a measurement challenge, though any low noise,

Collins, Philip G

2011-01-01T23:59:59.000Z

431

FischerTropsch synthesis on a model Co/SiO2 catalyst , Zhoujun Wang a  

E-Print Network [OSTI]

, although made vulnerable by the dramatic changes in crude oil prices, is still one of the few technologies and Texas A&M University, College Station, TX 77843, United States a r t i c l e i n f o Article history on crude oil, and much effort has been made to develop renewable energy technologies, such as solar, wind

Goodman, Wayne

432

Author's personal copy Graphene and nanostructured MnO2 composite  

E-Print Network [OSTI]

to develop new energy storage devices with high energy and high power density that can be used in hybrid vehicles and/ or electric cars to meet the requirement of low CO2 emissions. Supercapacitors, which requirements of future energy storage systems, rang- ing from portable electronics to hybrid vehicles and large

Qin, Lu-Chang

433

Non-thermal Plasma - Nanometer TiO2 Photocatalysis for Formaldehyde Decomposition  

E-Print Network [OSTI]

, followed by pumping in a mixture of formaldehyde and air. The purifier was then turned on to carry on the static state experiment of decomposing formaldehyde. The INTERSCAN4160 analysis instrument was adapted to analyze the variety of the formaldehyde...

Yuan, Q.; Feng, G.; Guang, X.

2006-01-01T23:59:59.000Z

434

O2-06-02 FDG METABOLISM IN THE DIAN STUDY OF AUTOSOMAL DOMINANT ALZHEIMER'S  

E-Print Network [OSTI]

Saykin6, Stephen Correia7, Peter Schofield8, Christopher Rowe9, Nick Fox10, Adam Brickman11, Bernardino Ringman5, Stephen Salloway15, John Morris4, Reisa Sperling16, Keith Johnson17, 1Massachusetts General Saykin6, Stephen Correia7, Peter Schofield8, Christopher Rowe9, Nick Fox10, Adam Brickman11, Bernardino

Thompson, Paul

435

Prparation de varistances SnO2 par le procd ODAP  

E-Print Network [OSTI]

properties even higher than the varistors containing zinc monoxide and this in spite of a doping similaires voire supérieures aux varistances à base de monoxyde de zinc et ceci malgré un dopage de la matrice 10 fois plus faible. ABSTRACT. Direct Oxidation of an Alloy Precursor allows the preparation

Paris-Sud XI, Université de

436

Coal Particle Flow Patterns for O2 Enriched, Low NOx Burners  

SciTech Connect (OSTI)

This project involved a systematic investigation examining the effect of near-flame burner aerodynamics on standoff distance and stability of turbulent diffusion flames and the resultant NO{sub x} emissions from actual pulverized coal diffusion flames. Specifically, the scope of the project was to understand how changes in near-flame aerodynamics and transport air oxygen partial pressure can influence flame attachment and coal ignition, two properties essential to proper operation of low NO{sub x} burners. Results from this investigation utilized a new 2M tall, 0.5m in diameter combustor designed to evaluate near-flame combustion aerodynamics in terms of transport air oxygen partial pressure (Po{sub 2}), coal fines content, primary fuel and secondary air velocities, and furnace wall temperature furnish insight into fundamental processes that occur during combustion of pulverized coal in practical systems. Complementary cold flow studies were conducted in a geometrically similar chamber to analyze the detailed motion of the gas and particles using laser Doppler velocimetry. This final technical report summarizes the key findings from our investigation into coal particle flow patterns in burners. Specifically, we focused on the effects of oxygen enrichment, the effect of fines, and the effect of the nozzle velocity ratio on the resulting flow patterns. In the cold flow studies, detailed measurements using laser Doppler velocimetry (LDV) were made to determine the details of the flow. In the hot flow studies, observations of flame stability and measurements of NO{sub x} were made to determine the effects of the flow patterns on burner operation.

Jennifer Sinclair Curtis

2005-08-01T23:59:59.000Z

437

Thermodynamic analysis and growth of ZrO2 by chloride chemical vapor deposition  

E-Print Network [OSTI]

reaction [9­12], and simple chamber designs (e.g., vertical, cold-wall, axisymmetric chamber) to deposit flow injector can be used. A stagnation plane flow injector (for vertical, cold-wall CVD chambers homogeneous nucleation and/ or reactor wall deposition. For example, Holstein [17] de- monstrated that at high

Anderson, Timothy J.

438

SnO2 Nanoribbons as NO2 Sensors: Insights from First Principles  

E-Print Network [OSTI]

-doped semiconductor with the intrinsic carrier density determined by the deviation from stoichiometry, primarily neighbors, and each O atom is a 3-fold bridge between neighboring Sn centers. At both the (1 0 1h) and (0 1

Yang, Peidong

439

Interfacial electron transfer dynamics of ru(II)-polypy6ridine sensitized TiO2  

SciTech Connect (OSTI)

Quantum dynamics simulations combined with density functional theory calculations are applied to study interfacial electron transfer (IET) from pyridine-4-phosphonic acid, [Ru(tpy)(tpy(PO{sub 3}H{sub 2}))]{sup 2+} and [Ru(tpy)(bpy)(H{sub 2}O)-Ru(tpy)(tpy(PO{sub 3}H{sub 2}))]{sup 4+} into the (101) surface of anatase TiO{sub 2}. IET rate from pyridine-4-phosphonic acid attached to the nanoparticle in bidentate mode ({tau} {approx} 100 fs) is an order of magnitude faster than the IET rate of the adsorbate attached in the monodentate mode ({tau} {approx} 1 ps). Upon excitation with visible light, [Ru(tpy)(tpy(PO{sub 3}H{sub 2}))]{sup 2+} attached to TiO{sub 2} in bidentate binding mode will undergo IET with the rate of {approx} 1-10 ps, which is competitive with the excited state decay into the ground state. The probability of electron injection from [Ru(tpy)(bpy)(H{sub 2}O)-Ru(tpy)(tpy(PO{sub 3}H{sub 2}))]{sup 4+} is rather low, as the excitation with visible light localizes the excited electron in the tpy-tpy bridge, which does not have favorable coupling with the TiO{sub 2} nanoparticle. The results are relevant to better understanding of the adsorbate features important for promoting efficient interfacial electron transfer into the semiconductor.

Jakubikova, Elena [Los Alamos National Laboratory; Martin, Richard L [Los Alamos National Laboratory; Batista, Enrique R [Los Alamos National Laboratory; Snoeberger, Robert C [YALE UNIV.; Batista, Victor S [YALE UNIV.

2009-01-01T23:59:59.000Z

440

(e.g. SiO2) Strong and high Tg, Tm  

E-Print Network [OSTI]

effect Low-energy excitation #12;#12;Propane Propene 1-Butene 1-Pentene 3-Methylpentane Tg / K 45.5 56-Gibbs Theory) Propene 1-Butene 1-Pentene 3MP Propane #12;CS2 60 K 70 K #12;Q Q #12;Sm (Q) = Sm u (Q) + Sm (Q.5 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 #12;(1) CCl4, CS2, propene, propane (2) CS2 Tg (3) CRR (4

Katsumoto, Shingo

Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Multifunctional (NOx/CO/O2) Solid-State Sensors For Coal Combustion Control  

SciTech Connect (OSTI)

Solid-state sensors were developed for coal combustion control and the understanding of sensing mechanisms was advanced. Several semiconducting metal oxides (p-type and n-type) were used to fabricate sensor electrodes. The adsorption/desorption characteristics and catalytic activities of these materials were measured with Temperature Programmed Desorption (TPD) and Temperature Programmed Reaction (TPR) experiments. The sensitivity, selectivity, and response time of these sensors were measured for steps of NO, NO{sub 2}, CO, CO{sub 2}, O{sub 2}, and H{sub 2}O vapor in simple N{sub 2}-balanced and multi-component, simulated combustion-exhaust streams. The role of electrode microstructure and fabrication parameters on sensing performance was investigated. Proof for the proposed sensing mechanism, Differential Electrode Equilibria, was demonstrated by relating the sensing behavior (sensitivities and cross-sensitivities) of the various electrode materials to their gas adsorption/desorption behaviors and catalytic activities. A multifunctional sensor array consisting of three sensing electrodes and an integrated heater and temperature sensors was fabricated with tape-casting and screen-printing and its NO{sub x} sensing performance was measured. The multifunctional sensor demonstrated it was possible to measure NO{sub 2} independent of NO by locally heating one of the sensing electrodes. The sensor technology was licensed to Fuel FX International, Inc. Fuel FX has obtained investor funding and is developing prototype sensors as a first step in their commercialization strategy for this technology.

Eric D. Wachsman

2006-12-31T23:59:59.000Z

442

Ostwald Ripening and Its Effect on PuO2 Particle Size in Hanford Tank Waste  

SciTech Connect (OSTI)

Between 1944 and 1989, the Hanford Site produced 60 percent (54.5 metric tons) of the United States weapons plutonium and produced an additional 12.9 metric tons of fuels-grade plutonium. High activity wastes, including plutonium lost from the separations processes used to isolate the plutonium, were discharged to underground storage tanks during these operations. Plutonium in the Hanford tank farms is estimated to be {approx}700 kg but may be up to {approx}1000 kg. Despite these apparent large quantities, the average plutonium concentration in the {approx}200 million liter tank waste volume is only about 0.003 grams per liter ({approx}0.0002 wt%). The plutonium is largely associated with low solubility metal hydroxide/oxide sludges where its low concentration and intimate mixture with neutron-absorbing elements (e.g., iron) are credited in nuclear criticality safety. However, concerns have been expressed that plutonium, in the form of plutonium hydrous oxide, PuO{sub 2} {center_dot} xH{sub 2}O, could undergo sufficient crystal growth through Ostwald ripening in the alkaline tank waste to potentially be separable from neutron absorbing constituents by settling or sedimentation. It was found that plutonium that entered the alkaline tank waste by precipitation through neutralization from acid solution is initially present as 2- to 3-nm (0.002- to 0.003-{mu}m) scale PuO{sub 2} {center_dot} xH{sub 2}O crystallite particles and grows from that point at exceedingly slow rates, posing no risk to physical segregation. These conclusions are reached by both general considerations of Ostwald ripening and specific observations of the behaviors of PuO{sub 2} and PuO{sub 2} {center_dot} xH{sub 2}O upon aging in alkaline solution.

Delegard, Calvin H.

2011-09-29T23:59:59.000Z

443

Short communication Effect of vanadium redox species on photoelectrochemical behavior of TiO2  

E-Print Network [OSTI]

. Alternative and sustainable energy sources such as solar, wind, tidal power, geothermal, hydroelectricity to 1 M. This finding might render this approach a very promising way of solar energy conversion are getting depleted. Among them, solar energy is considered to be the most reliable and inexhaustible source

Liu, Fuqiang

444

Electrode Characteristics of Individual, MnO2 Coated Carbon Nanotubes  

E-Print Network [OSTI]

transfer resistance, using an equivalent circuit model toequivalent circuit, shown in Fig. 4a, contains all of the possible interfacial resistances andEquivalent Circuit Model Specific aspects of interest in a pseudocapacitor include the diffusion resistance,

Collins, Philip G

2011-01-01T23:59:59.000Z

445

Magnetic properties of epitaxial Co-doped anatase TiO2 thin films...  

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point defects present in the bulk material, such as charge-compensating oxygen vacancies, but is instead attributed to the presence of extended structural defects. Citation:...

446

Structure of epitaxial (Fe,N) codoped rutile TiO2 thin films...  

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No evidence of structural disorder associated with a high concentration of oxygen vacancies is observed. Substitution of Fe for Ti could not be confirmed, although secondary...

447

Photoelectrochemical hydrogen production from water/ methanol decomposition using Ag/TiO2 nanocomposite  

E-Print Network [OSTI]

coal and gasoline [3]. Moreover, hydrogen can be used in fuel cells to generate electricity A & M University, College Station, TX 77843 3136, USA a r t i c l e i n f o Article history: Received 18, or directly as a transportation fuel [4]. Hydrogen can be generated from hydrocarbons and water resources

448

Electromechanical properties of freestanding graphene functionalized with tin oxide (SnO2) nanoparticles  

E-Print Network [OSTI]

to pristine freestanding graphene and propose a nanoparticle encapsulation model. VC 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4745780] Solar cells utilizing solid-state semiconductor materials. In the past ten years polymer heterojunction solar cells, which use cheaply manufactured organic polymers

Thibado, Paul M.

449

Li-Fe-P-O2 Phase Diagram from First Principles Calculations Shyue Ping Ong,  

E-Print Network [OSTI]

In recent years, lithium transition metal phosphates have emerged as promising cathodes for rechargeable the electrical conductivity of the electrode through coating with conducting phases (e.g., carbon or metallic, they attributed the increase to a percolating network of iron phosphides and phospho- carbides believed

Ceder, Gerbrand

450

Predissociation dynamics of the O2 B 3 u state: Vibrational state  

E-Print Network [OSTI]

of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 Received 14 April 1995; accepted 9 May 1995­Runge bands are the dominant absorbers of solar ultraviolet light in the wavelength range from 180 to 205 nm

Neumark, Daniel M.

451

Critical Configuration and Physics Measurements for Assemblies of U(93.15)O2 Fuel Rods  

SciTech Connect (OSTI)

A series of critical experiments were completed in 1962-1965 at Oak Ridge National Laboratory’s (ORNL’s) Critical Experiments Facility (CEF) in support of the Medium-Power Reactor Experiments (MPRE) program. In the late 1950s, efforts were made to study “power plants for the production of electrical power in space vehicles.”(a) The MPRE program was a part of those efforts and studied the feasibility of a stainless-steel system, boiling potassium 1 MW(t), or about 140 kW(e), reactor. The program was carried out in [fiscal years] 1964, 1965, and 1966. A summary of the program’s effort was compiled in 1967. The delayed critical experiments were a mockup of a small, potassium-cooled space power reactor for validation of reactor calculations and reactor physics methods. Initial experiments, performed in November and December of 1962, consisted of a core of unmoderated stainless-steel tubes, each containing 26 UO2 fuel pellets, surrounded by a graphite reflector. Measurements were made to determine critical reflector arrangements, fission-rate distributions, and cadmium ratio distributions. Subsequent experiments used beryllium reflectors and also measured the reactivity for various materials placed in the core. “The [assemblies were built] on [a] vertical assembly machine so that the movable part was the core and bottom reflector.”(Reference 1) The experiment studied in this evaluation was the first of the series and had the fuel tubes packed tightly into a 22.87 cm outside diameter (OD) core tank. Two critical configurations were found by varying the amount of graphite reflector (References 1 and 2). Once the critical configurations had been achieved, various measurements of reactivity, relative axial and radial activation rates of 235U, , and cadmium ratios were performed. The cadmium ratio, reactivity, and activation rate measurements performed on the critical configurations are described in Sections 1.3, 1.4 and 1.7, respectively. Information for this evaluation was compiled from References 1 and 2, reports on subsequent experiments in the series , and the experimental logbook, and from communication with the experimenter, John T. Mihalczo.

Margaret A. Marshall

2013-03-01T23:59:59.000Z

452

Compact Electrochemical Bi-functional NOx/O2 Sensors with an...  

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

developed using internal reference gas that is stable for months, has no complex electronics, and is amenable to mass production deer09singh.pdf More Documents & Publications...

453

Critical Configuration and Physics Measurements for Assemblies of U(93.15)O2 Fuel Rods  

SciTech Connect (OSTI)

A series of critical experiments were completed in 1962-1965 at Oak Ridge National Laboratory’s (ORNL’s) Critical Experiments Facility (CEF) in support of the Medium-Power Reactor Experiments (MPRE) program. In the late 1950s, efforts were made to study “power plants for the production of electrical power in space vehicles.”(a) The MPRE program was a part of those efforts and studied the feasibility of a stainless-steel system, boiling potassium 1 MW(t), or about 140 kW(e), reactor. The program was carried out in [fiscal years] 1964, 1965, and 1966. A summary of the program’s effort was compiled in 1967. The delayed critical experiments were a mockup of a small, potassium-cooled space power reactor for validation of reactor calculations and reactor physics methods. Initial experiments, performed in November and December of 1962, consisted of a core of unmoderated stainless-steel tubes, each containing 26 UO2 fuel pellets, surrounded by a graphite reflector. Measurements were made to determine critical reflector arrangements, fission-rate distributions, and cadmium ratio distributions. Subsequent experiments used beryllium reflectors and also measured the reactivity for various materials placed in the core. “The [assemblies were built] on [a] vertical assembly machine so that the movable part was the core and bottom reflector.”(Reference 1) The experiment studied in this evaluation was the first of the series and had the fuel tubes packed tightly into a 22.87 cm outside diameter (OD) core tank. Two critical configurations were found by varying the amount of graphite reflector (References 1 and 2). Once the critical configurations had been achieved, various measurements of reactivity, relative axial and radial activation rates of 235U, , and cadmium ratios were performed. The cadmium ratio, reactivity, and activation rate measurements performed on the critical configurations are described in Sections 1.3, 1.4 and 1.7, respectively. Information for this evaluation was compiled from References 1 and 2, reports on subsequent experiments in the series , and the experimental logbook, and from communication with the experimenter, John T. Mihalczo.

Margaret A. Marshall

2012-09-01T23:59:59.000Z

454

O2-06-05 AVOXEL-BASED MORPHOMETRY STUDY OF VOLUMETRIC MRI IN FAMILIAL ALZHEIMER'S  

E-Print Network [OSTI]

, Robert Koeppe3, Clifford Jack4, Marc Raichle2, Daniel Marcus2, John Ringman5, Paul Thompson5, Andrew (TIV), gender, acquisition site, and APOE genotype. An interaction term between group and the expected

Thompson, Paul

455

Direct Evidence of Lithium-Induced Atomic Ordering in Amorphous TiO2  

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456

Direct Imaging of Site-Specific Photocatalytic Reactions of O2 on  

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457

Direct Visualization of 2-Butanol Adsorption and Dissociation on TiO2(110).  

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458

Compact Electrochemical Bi-functional NOx/O2 Sensors with an Internal  

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

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459

Vacancy Assisted Diffusion of Alkoxy Species on Rutile TiO2(110). | EMSL  

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460

trans-K3[TcO2(CN)4]. | EMSL  

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Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Characteristics of Desulfation Behavior for Pre-Sulfated Pt-BaO/CeO2 Lean  

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462

Chemical Reactivity of Reduced TiO2(110): The dominant role of surface  

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463

Photochromic MOFs for Control of 1O2 Generation | Center for Gas  

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464

Self-assembled TiO2-Graphene Hybrid Nanostructures for Enhanced Li-ion  

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465

Self-assembling of nanocavities in TiO2 dispersed with Au nanoclusters. |  

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466

Acetone Chemistry on Oxidized and Reduced TiO2(110). | EMSL  

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467

Acetone-Assisted Oxygen Vacancy Diffusion on TiO2(110). | EMSL  

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468

Photochemical Grafting of Organic Alkenes to Single-Crystal TiO2 Surfaces:  

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469

Photochemistry of 1,1,1-Trifluoroacetone on Rutile TiO2(110). | EMSL  

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470

Photoemission Electron Microscopy of TiO2 Anatase Films Embedded with  

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471

Photoluminescence of SnO2 nanoparticles embedded in Al2O3. | EMSL  

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472

Effect of Niobium on the Defect Chemistry and Oxidation Kinetics of Tetragonal ZrO2  

E-Print Network [OSTI]

in water-cooled nuclear reactors. However, the mechanisms by which Nb impacts the corrosion resistance of Nuclear Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge-rich conditions, i.e., in the oxide surface facing oxidizing environment. We validate this finding by performing X

Yildiz, Bilge

473

Photoemission Electron Microscopy of TiO2 Anatase Films Embedded...  

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

densities between the two phases near the Fermi level. This assertion is confirmed by UPS data that shows the rutile work function to be 0.2 eV lower and a greater occupied...

474

acyclic bisn2o2 oxime: Topics by E-print Network  

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

of other random graph models with their corresponding real-world networks. Karrer, Brian 2009-01-01 20 Approximating Acyclicity Parameters of Sparse Hypergraphs Computer...

475

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

SciTech Connect (OSTI)

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.

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

476

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....

477

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

SciTech Connect (OSTI)

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.

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

478

Photodissociation of O2 via the Herzberg continuum: Measurements of O-atom alignment and orientation  

E-Print Network [OSTI]

resonantly enhanced multiphoton ionization 2 1 REMPI near 225 nm and the ions collected in a velocity regions: the Herzberg continuum 242­200 nm , the Schumann­Runge bands 200­176 nm , and the Schumann

Zare, Richard N.

479

Oxidative Dissolution Potential of Biogenic and Abiogenic TcO2...  

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

reduced by reaction with biogenic Fe(II) in two sediments differing in mineralogy and aggregation state (FRC, RG). Both sediments contained Fe(III) and Mn(IIIIV) as...

480

Water Interactions with Terminal Hydroxyls on TiO2 (110). | EMSL  

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Note: This page contains sample records for the topic "rpd-sc iot o-2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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481

Water as a Catalyst: Imaging Reactions of O-2 with Partially and Fully  

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482

Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2(110). |  

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483

N incorporation and electronic structure in N-doped TiO2(110) rutile. |  

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484

N incorporation, composition and electronic structure in N-doped TiO2(001)  

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485

N-TiO2 nanoparticles embedded in silica prepared by Ti ion implantation and  

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486

Dehydration and Dehydrogenation of Ethylene Glycol on Rutile TiO2(110). |  

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

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487

Describing excited state relaxation and localization in TiO2 nanoparticles  

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488

Low Temperature Autoignition of C8H16O2 Ethyl and Methyl Esters in a  

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

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489

Dendrimer-Encapsulated Ruthenium Nanoparticles as Catalysts for Lithium-O2  

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

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490

The Partial Oxidation of Isobutene and Propene on TiO2(110). | EMSL  

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

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491

The Stability of Organic Solvents and Carbon Electrode in Nonaqueous Li-O2  

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

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492

The Synthesis of Ag-Doped Mesoporous TiO2 . | EMSL  

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

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493

The Synthesis of Cadmium Doped Mesoporous TiO2. | EMSL  

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

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494

Hole-mediated Photodecomposition of Trimehtyl Acetate on a TiO2(001)  

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495

Hydrogen Reactivity on Highly-hydroxylated TiO2(110) Surfaces Prepared via  

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

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496

Imaging Adsorbate O-H Bond Cleavage: Methanol on TiO2(110). | EMSL  

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

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497

Imaging Hindered Rotations of Alkoxy Species on TiO2(110). | EMSL  

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498

Imaging Intrinsic Diffusion of Bridge-Bonded Oxygen Vacancies on TiO2(110).  

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

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499

Imaging Water Dissociation on TiO2(110): Evidence for Inequivalent Geminate  

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

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500

Importance of Diffusion in Methanol Photochemistry on TiO2(110). | EMSL  

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

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