Surface structure and catalytic CO oxidation oscillations

Publication Type:

Journal Article

Authors:

Danielak, R.; Perera, A.; Moreau, M.; Frankowicz, M.; Kapral, R.

Source:

Physica A: Statistical Mechanics and its Applications, Elsevier, Volume 229, Number 3-4, p.428-443 (1996)

URL:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030212785&doi=10.1016%2f0378-4371%2896%2900031-3&partnerID=40&md5=a8d00fa1103c9b161c6a57368e7313f4

Keywords:

Automata theory, Carbon monoxide, Catalytic oxidation, Cellular automaton model, Diffusion, Oscillations, Oxidation, Phase transitions, Platinum, Reaction kinetics, Spatiotemporal dynamics, Surface structure, Synchronization

Abstract:

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.