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The spatiotemporal pattern formation is studied in the catalytic carbonmonoxide oxidation reaction that takes into account the diffusion processesover the Pt(110) surface, which may contain structurally different areas. Theseareas are formed during CO-induced transition from a reconstructed phase with$1\times2$ geometry of the overlayer to a bulk-like ($1\times1$) phase withsquare atomic arrangement. Despite the CO oxidation reaction beingnon-autocatalytic, we have shown that the analytic conditions of the existenceof the Turing and the Hopf bifurcations can be satisfied in such systems. Thus,the system may lose its stability in two ways --- either through the Hopfbifurcation leading to the formation of temporal patterns in the system orthrough the Turing bifurcation leading to the formation of regular spatialpatterns. At a simultaneous implementation of both scenarios, spatiotemporalpatterns for CO and oxygen coverages are obtained in the system.

Spatiotemporal pattern formation in a three-variable CO oxidation reaction model