15-14E

The spatiotemporal pattern formation in the catalytic carbon monoxide oxidation reaction with taking into account the diffusion processes over the Pt(110) surface, which may contain structurally different areas, is studied. These areas are formed during CO-induced transition from a reconstructed phase with $1\times2$ geometry of the overlayer to a bulk-like ($1\times1$) phase with square atomic arrangement. It is shown that the system may lose its stability in two ways -- either through the Hopf bifurcation leading to the formation of temporal patterns in the system, namely oscillations, or through the Turing bifurcation leading to the formation of regular spatial patterns. At simultaneous implementation of both scenarios spatiotemporal patterns for oxygen coverage $\theta_{\rm O}$ are observed in the system. The distribution of $\theta_{\rm CO}$ is almost homogeneous in space and independent of the surface geometry.