A Monte Carlo (MC) model for the simulation of chemical reactions on a sruface coupled to a reactive gas phase with correct real-time dependence is presented.To avoid the shortcomings of the mean-field (MF) approximation.a lattice-gas model is used to describe the kinetics on the ractive surface.The local environemtn of an adosor atae modlecule is inlcuded explicityly.The corresponding master equationis solved by simulaion of stochastic processes with a Monte Carlo mehtod.THe model includes a description for theadsorption and desorption equilibria of CO and molecular oxygne on platinum as well as the sureface reaction of CO with O atoms.
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