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Titolo:
Hydrogen evolution reaction on a smooth iron electrode in alkaline solution at different temperatures
Autore:
de Chialvo, MRG; Chialvo, AC;
Indirizzi:
Univ Nacl Litoral, Fac Ingn Quim, PRELINE, RA-3000 Santa Fe, Argentina Univ Nacl Litoral Santa Fe Argentina RA-3000 RA-3000 Santa Fe, Argentina
Titolo Testata:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
fascicolo: 15, volume: 3, anno: 2001,
pagine: 3180 - 3184
SICI:
1463-9076(2001)3:15<3180:HEROAS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
ADSORPTION; INHIBITION; POLARIZATION; ENHANCEMENT; REDUCTION; KINETICS; SORPTION; METALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: de Chialvo, MRG Univ Nacl Litoral, Fac Ingn Quim, PRELINE, Santiago del Estero 2829, RA-3000 Santa Fe, Argentina Univ Nacl Litoral Santiago del Estero 2829 Santa Fe Argentina RA-3000
Citazione:
M.R.G. de Chialvo e A.C. Chialvo, "Hydrogen evolution reaction on a smooth iron electrode in alkaline solution at different temperatures", PHYS CHEM P, 3(15), 2001, pp. 3180-3184

Abstract

The hydrogen evolution reaction (HER) has been studied on a rotating polycrystalline smooth iron disc electrode in the temperature range 20 less thanor equal toT/degreesC less than or equal to 60 in 2 M NaOH. It has been demonstrated that only for \eta\greater than or equal to0.1 V can the polarisation curve be considered as that corresponding to the HER, due to the corrosion process that takes place at low overpotentials. The experimental results were adequately correlated by the Volmer-Heyrovsky-Tafel mechanism witha Langmuirian adsorption, considering alpha (V)not equal alpha (H). On this basis, two sets of kinetic parameters were found for each of the three elementary steps and the corresponding apparent activation energies were alsoevaluated. These results allowed the calculation of the experimental kinetic parameters, Tafel slope and extrapolated exchange current density, for all the temperatures studied.

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Documento generato il 05/04/20 alle ore 13:29:18