Modeling the butterfly : influence of lateral interactions and adsorption geometry on the voltammetry at (1 1 1) and (1 0 0) electrodes

M.T.M. Koper, J.J. Lukkien

Research output: Contribution to journalArticleAcademicpeer-review

28 Citations (Scopus)

Abstract

The adsorption of an ion or a molecule onto (1 1 1) and (1 0 0) surfaces is studied by means of Monte Carlo simulations. Different models for the repulsive lateral interactions are considered. Special attention is paid to ordered overlayers, how their formation depends on the lateral interactions, and how this is manifested in the isotherm and the adlayer compressibility. The latter quantity is proportional to the current in an electrochemical voltammetry experiment, and the phase transition by which ordered overlayers are formed often gives rise a very typical sharply peaked response known as a "butterfly". We show that the shape of the butterfly depends primarily on the details of the interactions and not on the structural order of the overlayer formed. We also illustrate how certain overlayers may fail to exhibit long-range ordering due to special domain wall-type defects that freeze mismatching configurations.
Original languageEnglish
Pages (from-to)105-115
JournalSurface Science
Volume498
Issue number1-2
DOIs
Publication statusPublished - 2002

Fingerprint Dive into the research topics of 'Modeling the butterfly : influence of lateral interactions and adsorption geometry on the voltammetry at (1 1 1) and (1 0 0) electrodes'. Together they form a unique fingerprint.

Cite this