Abstract
Monte Carlo methods have been used to examine the influence of lateral interactions between adspecies at a metal surface on the poisoning of surface reactions. A simple model is employed in which the nearest neighbour interaction energy ( B) between the poison species is allowed to vary between −5 and 10 kJ mol −1. The variation in the maximum extent of chemisorption is evaluated for differing values of B and poison coverage. It is demonstrated that the common procedure used to determine critical ensemble sizes produces misleading results which are seriously in error when lateral forces of interaction are considered and the catalytic significance of the results is discussed.
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