We propose a surface reaction model for $\mathrm{NO}$ reduction with ${\mathrm{NH}}_3$ on a $\mathrm{Pt}\left(100\right)$ single crystal catalyst surface and we explore it by carrying out Monte Carlo simulations. Our model includes experimentally observed realistic features such as adsorbate-induced surface phase transition, structure-dependent sticking coefficients and reactivity, desorption probabilities, and surface diffusion of adsorbed species. We discuss similarities found while comparing the available experimental data and our model as reactant ratio and temperature vary. Simulations qualitatively reproduce the kinetic oscillations observed in reaction rates and surface coverages. Also, the essential role of the adsorbate-induced phase transition regarding the appearance of kinetic oscillations is discussed.

• Received 23 November 2006

DOI:https://doi.org/10.1103/PhysRevE.75.061121