Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part 1. An adsorption-controlled mechanism

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

Research output: Contribution to journalArticle

166 Citations (Scopus)

Abstract

The electrochemical oxidation of H2O2 at a platinum rotating disk electrode was studied at pH 7.26 for the [H2O2] range 0-80 mM and for rotation rates 630-10,000 r.p.m. A mechanism is proposed to account for the steady-state current response as a function of both rotation rate and [H2O2]. The mechanism incorporates reversible binding of hydrogen peroxide to electrochemically generated Pt(II) surface sites with inhibiting competitive adsorption of dioxygen at these sites. A further inhibiting side reaction is also identified involving protonation of the surface adsorbed H2O2 complex.

Original languageEnglish
Pages (from-to)579-588
Number of pages10
JournalElectrochimica Acta
Volume43
Issue number5-6
Publication statusPublished - Nov 28 1997

Keywords

  • Hydrogen peroxide
  • Mechanism
  • Oxidation
  • Platinum
  • Rotating disk electrode

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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