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Investigation of the V(V)/V(IV) system for use in the positive half-cell of a redox battery

โœ Scribed by E. Sum; M. Rychcik; M. Skyllas-kazacos

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
755 KB
Volume
16
Category
Article
ISSN
0378-7753

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โœฆ Synopsis

The V(V)/V(IV) redox couple system has been studied at glassy carbon and gold electrodes in sulphuric acid solutions, using both cyclic voltammetry and rotating disc voltammetry. The system exhibits electrochemical irreversibility at a glassy-carbon surface with a value of k" = 7.5 X 10s4 cm 6'. The behaviour is strongly dependent on the method of surface preparation of the glassy carbon. At a gold electrode, surface reactions interfere with the reduction and oxidation of V(V)/V(IV). The diffusion coefficient of V(V) was calculated as 5.7 X 10q6 cm's_'.

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