Voltammetry and impedance of Pt(111) electrodes in aqueous KClO4 solutions

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Abstract

The voltammetric behaviour of Pt(111) electrodes in neutral and near-neutral aqueous KClO4 solutions (4 < pH < 9.7) is discussed. In this system, within the ideally polarizable potential region, the only processes affecting voltammetry and impedance are the adsorption and desorption of the H+ and OH- ions. Due to the low bulk concentrations of these ions, the desad processes are diffusion controlled. This situation is analysed using cyclic voltammetry, transient and impedance measurements.

Original languageEnglish
Pages (from-to)351-363
Number of pages13
JournalZeitschrift fur Physikalische Chemie
Volume217
Issue number4
Publication statusPublished - Jan 1 2003

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Keywords

  • Adsorption
  • Capacitance
  • Chemisorption
  • Diffusion
  • Platinum

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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