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Cyclic voltammetric study of quinone—hydroquinone organic system in aqueous magnesium perchlorate electrolyte

Authors
Journal
Journal of Power Sources
0378-7753
Publisher
Elsevier
Publication Date
Volume
45
Issue
2
Identifiers
DOI: 10.1016/0378-7753(93)87007-p

Abstract

Abstract This paper reports cyclic voltammetric investigations of the quinone—hydroquinone redox system in aqueous magnesium perchlorate medium containing different concentrations of p-benzoquinone. The studies have been performed on a glassy-carbon electrode and have furnished information on (i) the separation in potential (Δ E p) between the anodic and cathodic peaks, (ii) the anodic and cathodic peak currents, and (iii) the ratio of the anodic and cathodic charges ( Q a/ Q c) and the relationship of all three parameters with sweep rate. The interrelationship of Δ E p or Q a/ Q c with scan rate gives information that is almost in agreement from the view point of battery applications. The system exhibits best performance at an 8 mM concentration of p-benzoquinone.

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