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Potential relaxation and interfacial capacitance behaviour of the kolbe coupling reaction at Pt

Authors
Journal
Journal of Electroanalytical Chemistry
0022-0728
Publisher
Elsevier
Publication Date
Volume
242
Identifiers
DOI: 10.1016/0022-0728(88)80260-2

Abstract

Abstract Potential-relaxation studies have been made at a Pt electrode at which the Kolbe reaction is proceeding at appreciable Faradaic currents, in order to examine whether significant coverages of electroactive intermediates are involved. The capacitative behaviour of the Pt/aq. CH 3COOH + CH 3COONa interface, under conditions where the Kolbe reaction is taking place, is apparently determined almost entirely by a double-layer capacitance which has small values; thus, very little, if any, adsorption pseudocapacitance arising from electro-active, overpotential-deposited intermediate(s), can be detected, contrary to the situation for the anodic OER at Pt in acid solutions.

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