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Título

Effects of surface size on minimalistic stochastic models for the catalytic CO oxidation

AutorPineda, Miguel
Palabras claveCO oxidation
Monte Carlo simulations
Master equation
Fecha de publicación20-nov-2009
EditorElsevier
CitaciónPhysica A 389: 1178 (2010)
ResumenThe impact of surface size on two minimalistic models for the bistable CO oxidation is analytically studied. A simple model for the catalytic CO oxidation on nanoscale surfaces is analyzed by the chemical master equation. The analytical results predict a shift of the bistable region and cusp point in the global bifurcation diagram as a function of surface size. A reaction diffusion stochastic model consisting of a collection of reactive subdomains locally coupled by CO diffusion is also considered. A local description of fluctuations can be obtained after applying a Weiss-type mean-field approximation. This approximation predicts, for infinitely many subdomains, a break of ergodicity and a bifurcation behavior like in first-order phase transitions as a function of surface size and coupling parameter. Analytical results are compared with Gillespie-type Monte Carlo simulations
DescripciónM. Pineda...et al.
Versión del editorhttp://dx.doi.org/0.1016/j.physa.2009.11.024
URIhttp://hdl.handle.net/10261/48181
DOI0.1016/j.physa.2009.11.024
ISSN0378-4371
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