Monte Carlo simulations of ionic adsorption isotherms at single-crystal electrodes

M.T.M. Koper

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28 Citations (Scopus)

Abstract

A lattice–gas model is considered for ionic adsorption at single-crystal electrodes, the statistical mechanics of which is solved by means of Monte Carlo simulations. The model assumes a short-range nearest-neighbor repulsion and a long-range Coulomb repulsion between adsorbed adions. By fitting the model isotherm to the experimental isotherm for bromide adsorption on Ag(100), which is lattice–gas-like, some conclusions can be drawn regarding the relative importance of these two interaction channels. Various ordered adlayers appearing through second-order order–disorder transitions are found on (100) and (111) surfaces. The inclusion of a simple model for mutual depolarization of the adions leads to first-order phase transitions in the isotherms. Finally some simulations on a uniaxially corrugated (110) surface are considered and compared to experimental results of halide adsorption on Ag(110).
Original languageEnglish
Pages (from-to)1207-1212
JournalElectrochimica Acta
Volume44
Issue number6-7
DOIs
Publication statusPublished - 1998

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