Surface Structure and Catalytic $CO$ Oxidation Oscillations

Details Surface Structure and Catalytic $CO$ Oxidation Oscillations Surface Structure and Catalytic $CO$ Oxidation Oscillations

1996-02-13

arxiv.org/abs/chao-dyn/9602015v1

Nonlinear Sciences

Chaotic Dynamics

Latex file with six postscript figures. To appear in Physica A

Scientific paper

A cellular automaton model is used to describe the dynamics of the catalytic oxidation of $CO$ on a $Pt(100)$ surface. The cellular automaton rules account for the structural phase transformations of the $Pt$ substrate, the reaction kinetics of the adsorbed phase and diffusion of adsorbed species. The model is used to explore the spatial structure that underlies the global oscillations observed in some parameter regimes. The spatiotemporal dynamics varies significantly within the oscillatory regime and depends on the harmonic or relaxational character of the global oscillations. Diffusion of adsorbed $CO$ plays an important role in the synchronization of the patterns on the substrate and this effect is also studied.

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