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Titolo:
EIS study of hydrogen insertion under restricted diffusion conditions - I.Two-step insertion reaction
Autore:
Montella, C;
Indirizzi:
Ecole Natl Super Electrochim & Electrome Grenoble, Lab Electrochim & Physicochim Mat & Interfaces, CNRS UMR 5631, INPG,UJF, F-38402 St Martin Dheres,France Ecole Natl Super Electrochim & Electrome Grenoble St Martin DheresFrance F-38402
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1-2, volume: 497, anno: 2001,
pagine: 3 - 17
Fonte:
ISI
Lingua:
ENG
Soggetto:
AC-AV METHODS; ENTRY SIDE IMPEDANCE; THEORETICAL-ANALYSIS; ABSORPTION REACTION; BOUNDARY-CONDITIONS; MEMBRANE-ELECTRODE; PALLADIUM; SPECTROSCOPY; PERMEATION; FORMALISM;
Keywords:
hydrogen; adsorption; insertion; absorption; EIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Montella, C Ecole Natl Super Electrochim & Electrome Grenoble, Lab Electrochim & Physicochim Mat & Interfaces, CNRS UMR 5631, INPG,UJF, Domaine Univ,BP 75, F-38402 St Martin Dheres, France Ecole Natl Super Electrochim & Electrome Grenoble Domaine Univ,BP 75 St Martin Dheres France F-38402
Citazione:
C. Montella, "EIS study of hydrogen insertion under restricted diffusion conditions - I.Two-step insertion reaction", J ELEC CHEM, 497(1-2), 2001, pp. 3-17

Abstract

The theoretical expressions for the Faradaic impedance and electrode impedance are derived for indirect (two-step) insertion of hydrogen in metals and alloys, irrespective of the mass transport conditions in the electrode. Next, impermeable boundary (restricted diffusion) conditions are considered. The determination of the hydrogen concentration, diffusion coefficient andkinetic parameters from EIS data is discussed. The thermodynamic and kinetic conditions for which it is possible to distinguish between the direct tone-step) insertion mechanism and the indirect (two-step) mechanism on the basis of EIS data are analysed. Previous results in the electrochemical literature are discussed in relation to the theoretical derivation in this paper. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 04/06/20 alle ore 01:42:54