Correlation of the electrochemical reversibility and resolution of the anode and cathode peaks of the electrode processes of hydroquinone and metol on graphite and platinum

• Published in: Journal of analytical chemistry (New York, N.Y.) N.Y.), 2011-02, Vol.66 (2), p.201-206
• Main Authors: Kiryushov, V. N., Aleksandrova, T. P., Skvortsova, L. I., Vais, A. A.
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Chemical properties; Chemistry; Chemistry and Materials Science; Electrochemistry; Epoxy resins; Graphite
• ISSN: 1061-9348; 1608-3199
• DOI: 10.1134/S1061934810121020

Cyclic and direct voltammetry with linear potential sweep was used to study the potential difference of the anode and cathode peaks for hydroquinone and metol in the cyclic voltammograms ( CVA ) of their individual solutions on the main factors affecting the reversibility of the electrochemical process on electrodes of a graphite-epoxy composite ( GEC ), namely, the state of the surface of the indicator electrode, the pH of the buffer solution, and the mode of polarization. The surface state of the GEC electrode was affected by its passivation in air for various periods of time; the reversibility of the electrode process was judged by the difference between the anode and cathode potentials on the CVAs of hydroquinone and metol. A correlation was found between the degree of reversibility and the difference of peak potentials for similar electrode processes of hydroquinone and metol on the GEC electrode and other solid electrodes made of graphite materials and platinum.