Abstract
A modified lattice gas model for heterogeneous CO oxidation is proposed that takes into account microscopic nonuniformities of the catalyst surface. It is shown that, in contrast to the conventional model that assumes that the surface is uniform, according to the modified model the surface is not poisoned with the O2 phase when the concentration of nonuniformities is high. The mechanism considered in this paper may partly explain the behavior of the reaction system in the region of low CO concentrations.
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