Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Stability and electrochemical impedance of mechanisms with a single adsorbed species
Autore:
Harrington, DA; van den Driessche, P;
Indirizzi:
Univ Victoria, Dept Chem, Victoria, BC V8W 3V6, Canada Univ Victoria Victoria BC Canada V8W 3V6 em, Victoria, BC V8W 3V6, Canada Univ Victoria, Dept Math & Stat, Victoria, BC V8W 3P4, Canada Univ Victoria Victoria BC Canada V8W 3P4 at, Victoria, BC V8W 3P4, Canada
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1-2, volume: 501, anno: 2001,
pagine: 222 - 234
Fonte:
ISI
Lingua:
ENG
Soggetto:
VOLMER-HEYROVSKY MECHANISM; CHEMICAL-REACTION NETWORKS; MULTISTEP MECHANISMS; FARADAIC REACTIONS; AC IMPEDANCE; SPECTROSCOPY DIAGRAMS; AUTOMATIC DERIVATION; ARBITRARY COMPLEXITY; GOVERNING EQUATIONS; PLANE DISPLAYS;
Keywords:
impedance; EIS; stability; equivalent circuits; adsorbed; inductive; autocatalytic; hydrogen-evolution reaction; eigenvalue; Langmuir isotherm;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Harrington, DA Univ Victoria, Dept Chem, Victoria, BC V8W 3V6, Canada UnivVictoria Victoria BC Canada V8W 3V6 C V8W 3V6, Canada
Citazione:
D.A. Harrington e P. van den Driessche, "Stability and electrochemical impedance of mechanisms with a single adsorbed species", J ELEC CHEM, 501(1-2), 2001, pp. 222-234

Abstract

The stability, impedances, all possible equivalent circuits, and criteria for inductive behavior are investigated for mechanisms with a sine adsorbedspecies obeying Langmuir kinetics (mass-action kinetics). An eigenvalue analysis shows that these mechanisms art: stable when (i) there is a reactiontaking free sites to adsorbed species and a reaction taking adsorbed species to free sites and (ii) any autocatalytic reactions proceed in the backwards (autoinhibitory) direction. Stability is maintained even when autocatalytic reaction steps proceed in the forward direction, provided that the ratio of the forward rate to the backward rate does not exceed a critical value. The concept of e-stability is introduced and it is shown that these mechanisms have impedances that are realizable as an equivalent circuit when they are stable and c-stable. Inductive behavior call occur only if the mechanism has an electron-transfer step that is oxidizing in the direction of adsorption and an electron-transfer step that is reducing in the direction ofadsorption. A simple quantitative condition for inductive behavior is derived. The example of the hydrogen evolution reaction (her) is used to illustrate the ideas. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 00:29:24