ELECTROCHEMICAL-BEHAVIOR OF VANADIUM(V) VANADIUM(IV) REDOX COUPLE AT GRAPHITE-ELECTRODES

被引：141
|
作者：
ZHONG, S [1 ]
SKYLLAS-KAZACOS, M [1 ]
机构：
[1] UNIV NEW S WALES, SCH CHEM ENGN & IND CHEM, KENSINGTON, NSW 2033, AUSTRALIA
来源：
JOURNAL OF POWER SOURCES | 1992年 / 39卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
D O I：
10.1016/0378-7753(92)85001-Q
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The electrochemical behaviour of the V(V)/V(IV) couple has been studied at a graphite disc electrode in sulfuric acid using both cyclic and rotating-disc voltammetry. The results from the latter technique have revealed that the cathodic and anodic characteristics of this redox couple are quite different. The diffusion coefficient for V(IV), 2.14 x 10(-6) cm2 s-1, is independent of the vanadium concentration. For V(IV) oxidation, the electrode kinetic parameters i0 and alpha have values of 2.47 X 10(-4) A cm-2 and 0.71, respectively. The exchange current density, i0, for the V(V)/V(IV) reaction has been obtained at both graphite felt and reticulated vitreous carbon electrodes.
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页码：1 / 9
页数：9
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