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Catalysis by Supported Gold: Correlation between Catalytic Activity for CO Oxidation and Oxidation States of Gold
Abstract
X-ray absorption near-edge spectra and temperature-programmed oxidation and reduction data demonstrate that Au(I) and Au(0) are both present in working MgO-supported gold catalysts for CO oxidation. EXAFS data indicate gold clusters with essentially the same average diameter (about 30 A) in each catalyst sample. Thus, the results provide no evidence of an effect of gold cluster size on the catalytic activity, but both the catalytic activity and the surface concentration of Au(I) were found to decrease with increasing CO partial pressure (as Au(0) was increasingly formed), demonstrating that the catalytic sites incorporate Au(I).
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Metadata
- Authors
- Guzman, J., & Gates, B. C.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-02-14
- Volume
- 126
- Issue
- 9
- Pages
- 2672-2673
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2064245900
- Cited by
- 514
- References
- 0
- FWCI
- 27.29
- Type
- journal article
- Language
- en
- Open access
- closed
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