Electrochemical reduction and kinetics of hydrogen peroxide on the rotating disk palladium-plated aluminum electrode modified by Prussian blue film as an improved electrocatalyst.

Autor: Pournaghi-Azar, M. H., Ahour, F.
Předmět:
Zdroj: Journal of Solid State Electrochemistry; May2010, Vol. 14 Issue 5, p823-828, 6p, 10 Graphs
Abstrakt: This paper describes the use of an aluminum electrode plated by metallic palladium and modified by Prussian blue (PB/Pd-Al) in the electrocatalytic reduction of hydrogen peroxide (H2O2). The effect of pH on the electroreduction of H2O2 on the modified electrode is investigated and a simple irreversible reduction pathway is suggested. The electroreduction kinetics including transfer coefficient α, potential-dependent charge transfer rate constants kf, and diffusion coefficient D are estimated by means of forced hydrodynamic voltammetry using a rotating disk PB/Pd-Al electrode. The mean values obtained for kinetics are 0.38, 10-2 cm-1, and 7.6x10-6 cm² s-1, respectively. The long-term stability of the modifying layers on the Al substrate was studied. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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