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Titolo:
Adsorption of bromide at the Ag(100) electrode surface
Autore:
Wandlowski, T; Wang, JX; Ocko, BM;
Indirizzi:
KFA Julich GmbH, Forschungszentrum, Inst Grenzflachenforsch & Vakuumphys, D-52425 Julich, Germany KFA Julich GmbH Julich Germany D-52425 kuumphys, D-52425 Julich, Germany Brookhaven Natl Lab, Dept Appl Sci, Upton, NY 11790 USA Brookhaven Natl Lab Upton NY USA 11790 Dept Appl Sci, Upton, NY 11790 USA Brookhaven Natl Lab, Dept Phys, Upton, NY 11790 USA Brookhaven Natl Lab Upton NY USA 11790 ab, Dept Phys, Upton, NY 11790 USA
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1-2, volume: 500, anno: 2001,
pagine: 418 - 434
Fonte:
ISI
Lingua:
ENG
Soggetto:
SINGLE-CRYSTAL ELECTRODES; X-RAY-SCATTERING; AU(111) ELECTRODE; 2ND-HARMONIC GENERATION; HALIDE ADSORPTION; SOLID-SURFACES; LATTICE-GAS; UNDERPOTENTIAL DEPOSITION; SILVER ELECTRODES; IONIC ADSORPTION;
Keywords:
bromide adsorption; Ag(100) electrodes; chronocoulometry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
81
Recensione:
Indirizzi per estratti:
Indirizzo: Wandlowski, T KFA Julich GmbH, Forschungszentrum, Inst Grenzflachenforsch & Vakuumphys, Postfach 1913, D-52425 Julich, Germany KFA Julich GmbH Postfach 1913 Julich Germany D-52425 ermany
Citazione:
T. Wandlowski et al., "Adsorption of bromide at the Ag(100) electrode surface", J ELEC CHEM, 500(1-2), 2001, pp. 418-434

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 interactionenergies as well as surface dipole moments have been estimated. The experimental theta versus E- isotherms are modeled employing (i) a quasi-chemicalapproximation 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-Parsonsmodel of the Helmholtz layer. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 03/06/20 alle ore 09:36:38