Evolution of the Cu/ZnO Methanol Synthesis Catalyst During Its Reduction and Re-Oxidation Full article
Journal |
Reaction Kinetics and Catalysis Letters
ISSN: 0133-1736 , E-ISSN: 1588-2837 |
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Output data | Year: 2005, Volume: 86, Number: 2, Pages: 307-314 Pages count : 8 DOI: 10.1007/s11144-005-0326-y | ||
Tags | Copper, EXAFS, Methanol synthesis, Stacking fault | ||
Authors |
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Affiliations |
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Funding (2)
1 | Dutch Research Council | 047.015.004 |
2 | Russian Science Support Foundation |
Abstract:
Cu K EXAFS studies of the structure of Cu-Zn oxide catalyst were performed for the as prepared samples, those after its activation by hydrogen and after its subsequent re-oxidation. It was found that during the primary formation of the CuZnO solid solution, the copper ions are dissolved in the extended stacking faults of the ZnO lattice as ultra-small oxide clusters. Activation by hydrogen at 473 K leads to the reduction of most copper cations to Cu0 with the formation of nanoparticles with the characteristic size of ca. 1.6 nm. The copper metal particles were re-oxidized to Cu2+ at 523 K in a helium flow containing 0.05 vol. % oxygen. The re-oxidized cations do not form a CuO phase. Instead, they return to the extended stacking faults of ZnO. However, this time they form stripe-like clusters of square-planar coordinated copper cations.
Cite:
Pelipenko V.V.
, Kochubey D.I.
, Khassin A.A.
, Yurieva T.M.
Evolution of the Cu/ZnO Methanol Synthesis Catalyst During Its Reduction and Re-Oxidation
Reaction Kinetics and Catalysis Letters. 2005. V.86. N2. P.307-314. DOI: 10.1007/s11144-005-0326-y WOS Scopus РИНЦ
Evolution of the Cu/ZnO Methanol Synthesis Catalyst During Its Reduction and Re-Oxidation
Reaction Kinetics and Catalysis Letters. 2005. V.86. N2. P.307-314. DOI: 10.1007/s11144-005-0326-y WOS Scopus РИНЦ
Dates:
Submitted: | May 18, 2005 |
Accepted: | May 25, 2005 |
Published print: | Nov 1, 2005 |
Identifiers:
Web of science | WOS:000234487600012 |
Scopus | 2-s2.0-31344479785 |
Elibrary | 13477432 |
Chemical Abstracts | 2006:81053 |
Chemical Abstracts (print) | 144:115223 |
OpenAlex | W2016329660 |