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Voltammetric response and electrochemical properties of the O2/O •−2 couple in acetone

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Abstract

Voltammetric responses of the O2/O •−2 couple as a function of aprotic solvents are investigated. The results show that acetone is a suitable solvent for examining the electrode reaction of the O2/O •−2 couple. Studying the electrochemical behavior of the O2/O •−2 couple at different electrodes in acetone by cyclic voltammetry suggests that the reversibility of the O2/O •−2 couple and the redox peak currents at glassy carbon are better than those at gold and platinum. The kinetic parameters (electron transfer rate constant k 0 and cathodic transfer coefficient α) of the oxygen reduction to superoxide ion (O •−2 ) are evaluated using normal-pulse voltammetry. The obtained values of k 0 (cm/s) and α are (1.95 ± 0.05) × 10−4 and 0.34 ± 0.01, respectively. The scavenging activities of ascorbic acid and bilirubin are tested and the experimental results confirm that ascorbic acid is a better scavenger toward O •−2 .

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Authors and Affiliations

  1. Zhengzhou University of Light Industry, Zhengzhou, 450002, P.R. China

    Y. Wei, C. Shao & Hufeng

  2. Laoyang University, P.R. China

    Y. Wei

Authors
  1. Y. Wei
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  2. C. Shao
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  3. Hufeng
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Corresponding author

Correspondence to Y. Wei.

Additional information

Published in Russian in Elektrokhimiya, 2007, Vol. 43, No. 2, pp. 188–194.

The text was submitted by the authors in English.

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Wei, Y., Shao, C. & Hufeng Voltammetric response and electrochemical properties of the O2/O •−2 couple in acetone. Russ J Electrochem 43, 178–183 (2007). https://doi.org/10.1134/S1023193507020061

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  • DOI: https://doi.org/10.1134/S1023193507020061

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