An electrochemical investigation of graphite surfaces
1973; Elsevier BV; Volume: 18; Issue: 11 Linguagem: Inglês
10.1016/0013-4686(73)85040-6
ISSN1873-3859
Autores Tópico(s)Electrochemical Analysis and Applications
ResumoCurrent-potential curves were determined during the application of a triangular potential sweep to a graphite electrode immersed in acid electrolyte. A maximum of 3 anodic and 3 cathodic peaks were observed in these curves depending on the experimental conditions. The anodic peaks in the potential ranges (vs standard hydrogen electrode potential) of 0·59V–0·91V, of 0·97V–1·15V and of 1·35V–1·45V were associated with cathodic peaks in the potential ranges of 0·47V–0.79V and of 0·83V–1·01V and at a potential of 0·25V, respectively. It is proposed that the anodic peaks were caused by the oxidation of hydroquinone-like groups in different environments on the graphite electrode surface to form quinone-like groups while the cathodic peaks were caused by the reduction of these quinone-like groups.
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