Surface Catalytic Mechanism in Square-Wave Voltammetry

Mirceski, Valentin and Gulaboski, Rubin (2001) Surface Catalytic Mechanism in Square-Wave Voltammetry. Electroanalysis, 13 (16). pp. 1326-1334. ISSN 1040-0397

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A pseudo-first-order catalytic mechanism in which both reactant and product of the redox reaction are strongly immobilized on the electrode
surface is theoretically analyzed under conditions of square-wave voltammetry (SWV). A mathematical procedure is developed for diffusionless
conditions. The relationships between the properties of the voltammetric response and both the kinetic parameters of the redox
reaction and the parameters of the excitement signal are studied. The phenomenon of the quasireversible maximum is discussed. The
theoretical results are confirmed with the experiments of azobenzene performed in a presence of hydrogen peroxide. In acetate buffer with
pH 4.2 the standard rate constant of charge transfer of azobenzene is ks ¼ 12 s�1 and the catalytic rate constant in the presence of hydrogen
peroxide is kc ¼ 2.246104 s�1 mol�1 L.

Item Type: Article
Uncontrolled Keywords: surface catalytic mechanism, square-wave voltammetry, electrocatalysis, azobenzene, electrochemistry, kinetics
Subjects: Natural sciences > Biological sciences
Natural sciences > Chemical sciences
Natural sciences > Matematics
Natural sciences > Physical sciences
Divisions: Faculty of Agriculture
Depositing User: Rubin Gulaboski
Date Deposited: 31 Oct 2012 13:17
Last Modified: 31 Oct 2012 13:17

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