The redox reaction of hydrogen peroxide at an Au(100) electrode: Implications for oxygen reduction kinetics

Yong Li Zheng, Dong Mei, Yan Xia Chen, Shen Ye

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The redox reaction of hydrogen peroxide (O2 + 2H+ + 2e ⇄ H2O2) at an Au(100) electrode/0.1 M HClO 4 interface and the kinetic H-D isotope effect for O2 reduction have been investigated. It was found that i) the kinetics for electrochemical oxidation of H2O2 to O2 are very fast, occurring at a potential very close to its equilibrium potential (EO2/H2O2eq); ii) the kinetics for O 2 reduction to H2O2 are much slower than those for H2O2 oxidation, with a H-D kinetic isotope effect of above two; and iii) the onset overpotential of H2O2 + 2H+ + 2e → 2H2O is ca. 1.4 V. Mechanistic insight and the origin for the high overpotential at the onset for O2 reduction at Au(100) are discussed.

Original languageEnglish
Pages (from-to)19-21
Number of pages3
JournalElectrochemistry Communications
Volume39
DOIs
Publication statusPublished - 2014 Feb
Externally publishedYes

Keywords

  • Au(100) electrode
  • Hydrogen peroxide oxidation
  • Hydrogen peroxide reduction
  • Kinetics
  • Overpotential
  • Oxygen reduction

ASJC Scopus subject areas

  • Electrochemistry

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