Journal of Physical Studies 13(1), Article 4001 [7 pages] (2009) DOI: https://doi.org/10.30970/jps.13.4001 CATALYTIC CO OXIDATION REACTION: LATTICE MODELS AND KINETIC DESCRIPTION I. S. Bzovska, I. M. Mryglod Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1, Svientsitskii St., Lviv, UA--79011, Ukraine

The kinetics of processes of the catalytic CO oxidation is studied. On the basis of a kinetic model the stationary points of the system are found and the analysis of their stability is performed. It is revealed that at intermediate values of CO pressures the system has two stable points, so it is in the bistable state. In the framework of the lattice-gas model the effect of inactive adsorbed impurities on the kinetics of the reaction is investigated. It is shown that for slow impurities the bistable region is more narrow in comparison with the case of their fast dynamics when the distribution of impurities on the surface can be assumed equilibrium. Phase diagrams are investigated at the temperature $T=0$ by incorporating the nearest-neighbor interactions on a catalyst surface. The conditions of the existence of nonuniform phases depending on the interaction parameters are established.

PACS number(s): 05.50.+q, 68.43.-h, 82.65.+r

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