Room-temperature oxidation of reduced Cu/ZnO surfaces by lattice oxygen diffusion

At room temperature in the absence of gas-phase oxygen, reduced Cu on Cu/ZnO extracts oxygen from the ZnO lattice to reoxidize the surface. After 120 min at room temperature, diffusion of lattice oxygen reoxidizes reduced Cu/ZnO to 3% of its completely oxidized state. When gas-phase oxygen is presen...

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Bibliographic Details
Published inCatalysis letters Vol. 114; no. 3-4; pp. 185 - 191
Main Authors AHLERS, Jesse A, GRASSER, Jordan A, LOVELESS, Brett T, MUGGLI, Darrin S
Format Journal Article
LanguageEnglish
Published Dordrecht Springer 01.04.2007
Springer Nature B.V
Subjects
Catalysis
Chemistry
Exact sciences and technology
General and physical chemistry
Oxidation
Oxygen
Room temperature
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Zinc oxide
Heterogeneous catalysis
Oxygen
Transition metal Compounds
Transition element compounds
Transition metal
Oxidation
Zinc Oxides
Copper
Diffusion
Supported catalyst
Room temperature
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Summary:At room temperature in the absence of gas-phase oxygen, reduced Cu on Cu/ZnO extracts oxygen from the ZnO lattice to reoxidize the surface. After 120 min at room temperature, diffusion of lattice oxygen reoxidizes reduced Cu/ZnO to 3% of its completely oxidized state. When gas-phase oxygen is present, it promotes the partial reoxidation of the reduced Cu/ZnO surface at room-temperature.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-007-9065-1