CARBON-MONOXIDE OXIDATION OVER PLATINUM - STABLE, OSCILLATORY AND QUASI-CHAOTIC REGIMES

We model the heterogeneously catalyzed oxidation of CO over a Pt surfa ce. A phase diagram analysis is used to probe the several steady state regimes and their stability. We incorporate an experimentally observe d 'slow' sub-oxide kinetic step, thereby generalizing a previously pre sented 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. (C) 1998 E lsevier Science B.V. All rights reserved.