oxygen vacancies
Origin of the Two Dimensional Electron Gas at LaAlO3=SrTiO3 Interfaces: The Role of Oxygen Vacancies and Electronic Reconstruction
... the oxygen-annealed crystalline heterostructures, there is no universal critical thickness when the LAO is ...and oxygen vacancies in the STO substrate account for the interface ...conductivity. ...
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Asymmetric oxygen vacancies : the intrinsic redox active sites in metal oxide catalysts
... of oxygen vacancies (regarded as active sites) in oxide ...of oxygen vacancies is related to the rate of vacancy formation and that of vacancy ...active oxygen vacancy should have high ...
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Enhancement of Electrochemical Performance by the Oxygen Vacancies in Hematite as Anode Material for Lithium Ion Batteries
... The hydrothermal process at 140 °C for 12 h will lead to the formation of the gel-like precursor, which will be used as the starting material for the preparation of hematite with oxygen vacancies. The ...
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In Situ Analysis of Oxygen Vacancies and Band Alignment in HfO2/TiN Structure for CMOS Applications
... 10. Kaichev VV, Gladky AY, Prosvirin I, Saraev A, Hävecker M, Knop-Gericke A, Schlögl RBukhtiyarov VI (2013) In situ XPS study of self-sustained oscillations in catalytic oxidation of propane over nickel. Surf Sci ...
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Role of vanadium ions, oxygen vacancies, and interstitial zinc in room temperature ferromagnetism on ZnO V2O5 nanoparticles
... The complex mechanisms that allow ferromagnetic order at room temperature in diluted magnetic oxides (DMO) are a controversial subject as magnetic behavior is strongly dependent on the synthesis method and it is very ...
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Enhanced Oxygen Vacancies in Nanostructured LiNi0.5Mn1.5O4-δ with a P4332 Space Group
... samples at 0.1 C, 0.2 C, and 0.5 C. Figure 6(b) shows that the percentage of capacity loss of the current increases from 0.1 C to 0.2 C and from 0.2 C to 0.5 C. At a discharge rate of 0.2 C, the capacity was slightly ...
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The influence of oxygen vacancies on domain patterns in ferroelectric perovskites
... larization. Oxygen vacancies, commonly present and mobile at high temperature, are the primary defects and thus play a central role in these ...of oxygen vacancies in determining the ...
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Inference of oxygen vacancies in hydrothermal Na0 5Bi0 5TiO3
... methods. Hydrothermal NBT exhibits significantly greater structural distortion at room temperature than solid-state NBT. Peak widths and superstructure peak intensities show a phase transition at ~ 305 °C, with trends ...
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Study on Resistance Switching Properties of Na0 5Bi0 5TiO3Thin Films Using Impedance Spectroscopy
... the oxygen vacancies lead to shallow-level electrons, which may be trapped by Ti 4? ions or oxygen vacancies and are easy to be activated by conducting ...of oxygen vacancies are ...
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Effect of support redox character on catalytic performance in the gas phase hydrogenation of benzaldehyde and nitrobenzene over supported gold
... Surface oxygen vacancies have been proposed as active sites in a range of applications from automobile exhaust treatment [65], water-gas shift [66] to steam reforming of oxygenates ...these vacancies ...
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Catalytic Performance of La0 6Ca0 4Fe1 xNixO3 Perovskites in DME Oxidation
... of oxygen vacancies, segregated phases and a progressive decrease in the perovskite structure are ...the oxygen vacancies indicate that the active sites for the DME combustion are directly ...
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Synthesis and Characterization of Fe3+ and CeO2 Co-decorated NiOOH Electrocatalysts Supported by Nickel Foam for the Oxygen Evolution Reaction
... more oxygen vacancies in the NiOOH structure as measured by X-ray photoelectron ...in oxygen vacancies in NiOOH significantly increases the conductivity and activity of the catalyst and ...
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Enhanced orange-red emission from alkaline earth metal oxide doped with Sm 3+ and co-doped with some alkali metal ions
... Sm 3+ , reduce environment symmetry around Sm 3+ ions and cause hole traps to quench the CeO CTS luminescence. Furthermore, more are the oxygen vacancies generated by doping ions, more is the effective ...
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Structural Characterisation of Bi1-xAxFeO3 (x=0.00, 0.05 and A = Sr) Nano-particles Synthesised Using Combustion Technique
... of charge compensation, the oxygen vacancies are also created. The crystallite size calculated using Scherer formula is large for doped sample in comparison to pure bismuth ferrite sample. In doped sample, ...
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Ferroelectric Field Effect Induced Asymmetric Resistive Switching Effect in BaTiO3/Nb:SrTiO3 Epitaxial Heterojunctions
... and oxygen vacancies, respectively, under posi- tive and negative ...the oxygen vacancies can migrate across the BTO/NSTO interface, from BTO to NSTO (from NSTO to BTO) for polarization points ...
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Reduced erbium doped ceria nanoparticles: one nano host applicable for simultaneous optical down and up conversions
... From the defect state, the electron undergoes multiple transitions as it returns to the ground state. Only one of the transitions results in radiative emission and the other transitions are non-radiative. The rate of ...
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Hole conductivity in oxygen-excess BaTi(1-x)CaxO(3-x+d)
... 1, oxygen vacancies are filled by dissociated oxygen anions; it is assumed that these are O ions and for each, one lattice O 2 ion ionises to produce a second O ...2, oxygen vacancies ...
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Effect of Y on the Properties of Sm Doped Ceria for IT SOFC Applications
... conductivity from these plots are in the range 1.05 - 1.21 eV. This is observed to be very close to the activation energy of relaxation in the range 1.19 - 1.28 eV (Table 1). It is indicates that the presence of ...
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Photoluminescence emission of nanoporous anodic aluminum oxide films prepared in phosphoric acid
... would emit UV PL radiation due to the F + color centers at approximately 3.8 eV (326 nm). Only one PL emission about 3.8 eV is fitted out among our results (see the 323-nm peak in Figure 4c). But several visible ...
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Bipolar resistive switching in p type Co3O4 nanosheets prepared by electrochemical deposition
... where oxygen vacancies play a crucial role in the switching process, understanding the resistive switching conduction nature of p-type oxides such as co- balt oxides and nickel oxides, which exhibit ...
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