Resumo

ALAS, S. J.. Estudio del efecto de impurezas sobre el comportamiento oscilatorio y espacial en la reacción CO + NO en Pt(100) por Monte Carlo dinámico. Superf. vacío [online]. 2015, vol.28, n.3, pp.78-85. ISSN 1665-3521.

A dynamic Monte Carlo simulation is proposed to explore the effect of inert surface impurities on the oscillatory behavior and pattern formation in the NO reduction by CO on Pt(100) surface at ultra high vacuum conditions (UHV) and relatively high temperature conditions. In this study was found that sustained oscillations change into a damped one and the spatial patterns, in this case cell type, are broken when the amount of impurities increases. This occurs mainly because the amount of the adsorbed species clusters decreases, the dissociation of adsorbed NO is slow and the diffusive movement of the adsorbed species is delayed.

Palavras-chave : Pt(100) Surface; NO reduction; Oscillations; Pattern formation; Impurities; Dynamic Monte Carlo.