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Some aspects of the EIS study of the rhodium electrode in the hydrogen evolution region (CROSBI ID 94209)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Horvat-Radošević, Višnja ; Kvastek, Krešimir Some aspects of the EIS study of the rhodium electrode in the hydrogen evolution region // Electrochimica acta, 48 (2002), 4; 311-322-x

Podaci o odgovornosti

Horvat-Radošević, Višnja ; Kvastek, Krešimir

engleski

Some aspects of the EIS study of the rhodium electrode in the hydrogen evolution region

General expression for the frequency dependence of the faradaic electrode admittance is derived for the case when the rate of the hydrogen evolution reaction (HER) depends on the potential, potential dependent surface fraction of adsorbed hydrogen, and potential dependent surface or subsurface concentration of the molecular or absorbed hydrogen, respectively. The simplified version of the general expression was adjusted to take into account two different specific reaction mechanisms of HER, and applied in the analysis of the experimentally measured impedance spectra of the rhodium/H_2SO_4 in the region of low cathodic overpotentials. The results of the fitting procedure suggested proceedings of HER in parallel with diffusion associated with some absorption of hydrogen within the rhodium metal layer.

Rhodium electrode; Electrochemical Impedance Spectroscopy; Faradaic admittance/frequency equation; Hydrogen evolution; Hydrogen insertion

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Podaci o izdanju

48 (4)

2002.

311-322-x

objavljeno

0013-4686

Povezanost rada

Kemija

Indeksiranost