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Current Topics in Catalysis   Volumes    Volume 3 
Abstract
Determination of kinetic parameters of surface processes involving absorbed CO species on supported metal catalysts using FTIR spectroscopy
D. Bianchi
Pages: 161 - 170
Number of pages: 10
Current Topics in Catalysis
Volume 3 

Copyright © 2002 Research Trends. All rights reserved

ABSTRACT

FTIR spectroscopy is recognized as a qualitative analytical method to characterize adsorbed CO species on supported metal catalysts. For instance, it allows one to determine the formation of linear, bridged or gem-dicarbonyl CO species on the metal particles and to study the impact of several parameters such as the metal dispersion, the coverage of the metal surface or the presence of co-adsorbed species. Recently, we have used FTIR spectroscopy as a quantitative method to determine kinetic parameters of surface elementary steps involved in catalytic reactions such as CO/O2 and CO/H2. The present paper summarizes three applications of the procedure: (a) the determination of the heats of adsorption of specific adsorbed CO species on several supported metal catalysts, (b) the rate constant of oxidation of the L CO species on a Pt/Al2O3 catalysts and (c) the rate constant of hydrogenation of the L CO species on a Ru/Al2O3 catalyst.

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