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The role of impurities on the low temperature CO oxidation on Au/TiO2

Soares, J.M.C., Hall, M., Cristofolini, M. and Bowker, M. (2006) The role of impurities on the low temperature CO oxidation on Au/TiO2. Catalysis Letters, 109 (1-2). pp. 103-108. ISSN 1011-372X

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To link to this item DOI: 10.1007/s10562-006-0064-4

Abstract/Summary

A number of Au/TiO2 catalysts have been prepared by a variety of methods in order to assess the affect of catalysts preparation methods on performance, catalyst contamination and the interplay between them. Their activity was studied in a pulse flow microreactor and it was found that preparation methods designed to eliminate impurities lead to more active samples. The effect of chlorine is often cited to be detrimental in the literature, but we have quantified it using XPS. It was found that the activity decreased in a nearly linear fashion with an increasing amount of this element at the surface. It is generally considered that catalysts prepared by the incipient wetness (IW) technique are ineffective for CO oxidation, but we show here that, by appropriate preparation methods, high activity IW catalysts can be made.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11627
Uncontrolled Keywords:gold catalysis, CO oxidation, Cl poisoning, Au catalyst preparation, incipient wetness impregnation, high activity Au catalysts, low, temperature catalysis, SUPPORTED AU CATALYSTS, CARBON-MONOXIDE, GOLD, NANOPARTICLES, IMPREGNATION

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