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Study on the electroreduction process of oxygen to superoxide ion by using acetylene black powder microelectrode

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Abstract

In this paper, the powder microelectrode technique was employed in studying the voltametric response of the O2/ −2 couple, which demonstrated a nearly reversible redox process at an acetylene black powder microelectrode in N,N-dimethylformamide (DMF). A well-developed steady state current plateau for the electrochemical reduction of oxygen was obtained in this system. The electron transfer number (n) and heterogeneous electron transfer rate constant k s were measured by steady-state voltametric response, and the results were 1.08, 3.4 × 10−3 cm s−1, respectively. Additionally, the scavenging activity of O −2 with biological antioxidant (ascorbic acid) was evaluated by cyclic voltammetry; IC50 came to 5 × 10−4 mol/l.

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Authors and Affiliations

  1. Department of Environment and Chemical Engineering, Luoyang University, Luoyang, 471023, P. R. China

    Yingliang Wei & Shaowen Zhang

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  1. Yingliang Wei
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  2. Shaowen Zhang
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Correspondence to Yingliang Wei.

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Published in Russian in Elektrokhimiya, 2008, Vol. 44, No. 8, pp. 1040–1044.

The text was submitted by the authors in English.

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Wei, Y., Zhang, S. Study on the electroreduction process of oxygen to superoxide ion by using acetylene black powder microelectrode. Russ J Electrochem 44, 967–971 (2008). https://doi.org/10.1134/S1023193508080144

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  • DOI: https://doi.org/10.1134/S1023193508080144

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