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Stabilization of cationic gold species on Au/CeO2 catalysts under working conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
44673 46052 2006 4 PDF Available
Title
Stabilization of cationic gold species on Au/CeO2 catalysts under working conditions
Abstract

Infrared spectroscopy of CO adsorption at low temperature has shown the presence of oxidized gold species (Au+ and Au3+) on nanocrystalline Au/CeO2 catalyst. This species are quite stable even under reduction conditions like the CO oxidation reaction. The concentration of this species decrease by increasing the pre-treatment temperature of the Au/CeO2 catalyst which is in accordance with a decrease in the catalytic activity of the sample. In accordance oxidized gold species are involved in the catalytic activity of Au/CeO2 catalyst for CO oxidation although the participation of metallic sites cannot be excluded.

Keywords
FTIR; CO adsorption; Oxidized gold; Nanocrystalline CeO2
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Stabilization of cationic gold species on Au/CeO2 catalysts under working conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 307, Issue 1, 12 June 2006, Pages 42–45
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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