Journal Article

PreJuSER-40430

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Adsorption of bromide at the Ag(100) electrode surface

Wandlowski, T.FZJ* ; Wang, J. X. ; Ocko, B. M.

2001
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/S0022-0728(00)00380-6

Abstract: The adsorption and phase formation of bromide on Ag(100) has been studied by chronocoulometry and surface X-ray scattering (SXS). With increasing electrode potential, bromide undergoes a phase transition from a lattice gas to an ordered c(2 x 2) structure (theta = 0.5). The degree of lateral disorder was estimated by comparing the SXS- and the electrochemical measurements. Based on chronocoulometric experiments, a thermodynamic analysis of charge density data was performed to describe the bromide adsorption at the Ag(100) electrode. The Gibbs surfaces excess, electrosorption valencies, Esin-Markov coefficients, and the Gibbs energy of adsorption, lateral interaction energies as well as surface dipole moments have been estimated. The experimental theta versus E- isotherms are modeled employing (i) a quasi-chemical approximation as well as (ii) the results of a recent Monte Carlo simulation. An attempt is made to discuss the structure data and thermodynamic quantities of bromide adsorption on Ag(100) on the basis of the Grahame-Parsons model of the Helmholtz layer. (C) 2001 Elsevier Science B.V. All rights reserved.

Keyword(s): J ; bromide adsorption (auto) ; Ag(100) electrodes (auto) ; chronocoulometry (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Grenzflächen und Vakuumtechnologien (ISG-3)
2. Mikrostrukturforschung (IFF-IMF)

Research Program(s):

1. Struktur und Dynamik von Grenzflächen (29.25.0)

Appears in the scientific report 2001

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