Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part V: Inhibition by chloride

Simon B. Hall, Emad A. Khudaish, Alan L. Hart

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53 Citations (Scopus)

Abstract

The electrochemical oxidation of H2O2 at platinum rotating disc electrodes and microelectrodes was studied in the presence of chloride in the range 0-120 mM at pH 7.3. Oxidation was inhibited by chloride with greater inhibition at higher electrode rotation rates. The mode of inhibition was deduced to be non-competitive with the chloride interacting with precursor binding sites at the electrode surface, since increased [H2O2] did not decrease the degree of inhibition. The rotation rate dependence indicates that it is likely a soluble platinum complex involving chloride forms to remove binding sites from the electrode surface.

Original languageEnglish
Pages (from-to)3573-3579
Number of pages7
JournalElectrochimica Acta
Volume45
Issue number21
Publication statusPublished - Jul 14 2000

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Keywords

  • Electrochemical electrode
  • Enzyme
  • Rotating disk electrode

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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