Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part III: Effect of temperature

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

The electrochemical oxidation of H2O2 at a platinum rotating disc electrode was studied in 0.1 M phosphate buffer at pH 7.26 for the [H2O2] range 0-40 mM, rotation rates 630-10000 rpm and anodic potential +264 to +712 mV vs. Ag/AgCl using staircase potentiometry over the temperature range 5-35°C. The results were interpreted in terms of a surface binding site model involving two modes of product inhibition. Potential- and temperature-invariant values of the constants for H2O2, H+ and O2 binding were determined and the rate constants for reduction and the re-oxidation of the binding site as a function of potential and temperature were evaluated together with the activation energy for the reduction of the binding site.

Original languageEnglish
Pages (from-to)2455-2462
Number of pages8
JournalElectrochimica Acta
Volume44
Issue number14
Publication statusPublished - Mar 1 1999

Keywords

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

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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