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Aspects of dissociative chemisorption and promotion in catalysis

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Abstract

Catalysis is a cyclic event in which reactants adsorb on the catalyst, react on the surface and desorb into the gas phase, leaving empty adsorption sites behind for the next catalytic cycle. Very often, at least one of the participating reactants has to dissociate. This paper qualitatively reviews the electronic interactions between an adsorbed molecule and the surface that lead to dissociation, and discusses in more detail how alkali metal promoters enhance this interaction by lowering the electrostatic surface potential. As a dissociating molecule generally needs an ensemble of several metal atoms, the kinetics of the dissociation reaction depends sensitively on the surface coverage, as is illustrated for the dissociation of NO on rhodium.

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  1. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands

    J. W. Niemantsverdriet

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Niemantsverdriet, J.W. Aspects of dissociative chemisorption and promotion in catalysis. Appl. Phys. A 61, 503–509 (1995). https://doi.org/10.1007/BF01540251

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