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Carbon monoxide oxidation over platinum: stable, oscillatory and quasi-chaotic regimes

1998; Elsevier BV; Volume: 257; Issue: 1-4 Linguagem: Inglês

10.1016/s0378-4371(98)00167-8

1873-2119

Roberto E. Lagos, Tania P. Simões, Adolfo L. Godoy,

Catalysis and Oxidation Reactions

We model the heterogeneously catalyzed oxidation of CO over a Pt surface. A phase diagram analysis is used to probe the several steady state regimes and their stability. We incorporate an experimentally observed ‘slow’ sub-oxide kinetic step, thereby generalizing a previously presented model. In agreement with experimental data, stable, oscillatory and quasi-chaotic regimes are obtained. Furthermore, the inclusion of the sub-oxide step yields a relaxation oscillation regime.