The preparation of Au/CeO2 catalysts and their activities for low-temperature CO oxidation

Au/CeO2 catalysts prepared by co-precipitation (CP) and deposition-precipitation (DP) methods were tested for low temperature CO oxidation reaction. The structural characters and redox features of the catalysts were investigated by XRD, XPS and H2-TPR. Their catalytic performances for low temperatur...

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Bibliographic Details
Published in:Catalysis letters 2006-11, Vol.112 (1-2), p.115-119
Main Authors: WANG, Xiao-Ying, WANG, Shu-Ping, WANG, Shu-Rong, ZHAO, Ying-Qiang, JING HUANG, ZHANG, Shou-Min, HUANG, Wei-Ping, WU, Shi-Hua
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Cerium oxides
Chemistry
Coprecipitation
Exact sciences and technology
General and physical chemistry
High temperature
Load resistance
Low temperature
Oxidation
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
X ray photoelectron spectroscopy
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Summary:Au/CeO2 catalysts prepared by co-precipitation (CP) and deposition-precipitation (DP) methods were tested for low temperature CO oxidation reaction. The structural characters and redox features of the catalysts were investigated by XRD, XPS and H2-TPR. Their catalytic performances for low temperature CO oxidation were studied by means of a microreactor -GC system. It showed that the catalytic activities of Au/CeO2 catalysts greatly depended on the preparation method. The catalysts prepared by DP method exhibited a surprisingly higher activity towards CO oxidation than that prepared by CP method. This may arise from the differences in the particle sizes of Au and redox properties of the catalysts. The low Au loading and the resistance to high temperature of DP-prepared catalyst made it more applicable.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-006-0173-0