Kinetics of electroreduction of S2O82− anions on mechanically renewable silver electrode
- Authors: Safonov V.A.1, Choba M.A.1
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Affiliations:
- Faculty of Chemistry
- Issue: Vol 53, No 1 (2017)
- Pages: 16-24
- Section: Special Issue: X International Frumkin Symposium on Electrochemistry (Moscow, October 21–23, 2015), Part 2
- URL: https://journals.rcsi.science/1023-1935/article/view/188375
- DOI: https://doi.org/10.1134/S1023193517010116
- ID: 188375
Cite item
Abstract
The kinetics of electroreduction of peroxodisulfate anions on a mechanically renewed silver electrode is studied by voltammetric and impedance methods. Impedance diagrams obtained in the region of negatively charged metal surface are successfully modeled by the equivalent circuit formed by the solution resistance and also the reaction resistance connected in parallel with the constant-phase element substituted for the double layer capacitance. The analysis of experimental data carried out in terms of this circuit and their comparison with the literature data makes it possible to assume that the reduction kinetics of S2O82− anions on this electrode can be adequately described in the framework of the phenomenological theory of slow discharge. The reasons for deviation of the literature data on the kinetics of this reaction on polycrystalline Ag electrode from the relationships following from the slow discharge theory are put forward and substantiated.
About the authors
V. A. Safonov
Faculty of Chemistry
Author for correspondence.
Email: safon@elch.chem.msu.ru
Russian Federation, Leninskie Gory, Moscow, 119992
M. A. Choba
Faculty of Chemistry
Email: safon@elch.chem.msu.ru
Russian Federation, Leninskie Gory, Moscow, 119992