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Impedance spectroscopy data for S2O82−anion electroreduction at Bi(1 1 1) plane

Authors
Journal
Electrochimica Acta
0013-4686
Publisher
Elsevier
Publication Date
Volume
53
Issue
8
Identifiers
DOI: 10.1016/j.electacta.2007.11.055
Keywords
  • Electroreduction Of S2O82−Anion
  • Kinetic Steps
  • Impedance Spectroscopy
  • Bi Single Crystal
Disciplines
  • Chemistry

Abstract

Abstract Electroreduction kinetics of the peroxodisulfate anions on the electrochemically polished Bi(1 1 1) single crystal electrode has been studied by impedance spectroscopy. Influence of the electrode potential, reaction intermediates, base electrolyte and reactant concentrations on the kinetic parameters of electroreduction has been established. Systematic analysis of the fitting results demonstrates the noticeable influence of adsorption of the reaction intermediate or reactant on the electroreduction rate of the S 2O 8 2− anions at the Bi(1 1 1) electrode. In the region of so-called “current pits” in the cyclic voltammetry curves, obtained by rotating disc electrode method, the mixed kinetics, i.e. the adsorption and “true” charge transfer limited steps have been established by impedance spectroscopy.

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