CYCLIC VOLTAMMETRIC STUDY OF QUINONE HYDROQUINONE ORGANIC-SYSTEM IN AQUEOUS MAGNESIUM PERCHLORATE ELECTROLYTE

This paper reports cyclic voltammetric investigations of the quinone-h ydroquinone redox system in aqueous magnesium perchlorate medium conta ining different concentrations of p-benzoquinone. The studies have bee n performed on a glassy-carbon electrode and have furnished informatio n on (i) the separation in potential (DELTAE(p)) between the anodic an d 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 rel ationship of all three parameters with sweep rate. The interrelationsh ip of DELTAE(p) or Q(a)/Q(c) with scan rate gives information that is almost in agreement from the view point of battery applications. The s ystem exhibits best performance at an 8 mM concentration of p-benzoqui none.