منابع مشابه
Ordered phases in alkali redistribution during a catalytic surface reaction
Reaction fronts in the O2+H2 reaction on a Rh(110) surface predosed with potassium have been shown to be associated with a redistribution of the potassium from the oxygen freed to the still oxygen covered parts of the surface. As stable final state a stationary pattern results under reaction conditions formed by K+O coadsorption islands of macroscopic size. Here low energy electron microscopy (...
متن کاملModel of the catalytic A+B-->0 reaction with surface reconstruction.
The A+B-->0 reaction model with a surface reconstruction is analyzed. It is compared with another similar model for the A+1/2B2-->0 reaction [V. N. Kuzovkov et al., J. Chem. Phys. 108, 5571 (1998)], which mimics the CO oxidation reaction on the Pt surfaces. The effect of monomer B adsorption instead of dimer B2 is examined. It is shown that qualitative system features such as reactant concentra...
متن کاملSurface Modifications during a Catalytic Reaction: a Combined APT and FIB/SEM Analysis of Surface Segregation
To improve the understanding of catalytic processes, the surface structure and composition of the active materials need to be determined before and after reaction. Morphological changes may occur under reaction conditions and can dramatically influence the reactivity and/or selectivity of a catalyst. Goldbased catalysts with different architectures are currently being developed for selective ox...
متن کاملMean - field analysis and Monte Carlo study of an interacting two - species catalytic surface reaction model
We study the phase diagram and critical behavior of an interacting one dimensional two species monomer-monomer catalytic surface reaction model with a reactive phase as well as two equivalent adsorbing phase where one of the species saturates the system. A mean field analysis including correlations up to triplets of sites fails to reproduce the phase diagram found by Monte Carlo simulations. Th...
متن کاملNon equivalent adsorption sites on the ZGB catalytic reaction model
We studied in this work a modified version of the Ziff, Gulari and Barshad (ZGB) model in which the adsorption probabilities of CO and O 2 are site dependent. We employed Monte Carlo simulations to determine the phase diagram of the model as a function of the partial pressure of CO in the gaseous phase, and of the relative adsorption probabilities. For the case where there is no site with affin...
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ژورنال
عنوان ژورنال: Journal of Computational and Applied Mathematics
سال: 1992
ISSN: 0377-0427
DOI: 10.1016/0377-0427(92)90103-5