The reduction of oxygen on titanium oxide electrodes

Victor B. Baez, John E. Graves, Derek Pletcher

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64 Citations (Scopus)

Abstract

The cathodic reduction of oxygen in 1 mol dm-3 sodium hydroxide solutions has been investigated at several types of titanium oxide cathodes. Layers of TiO2 were prepared on titanium by spraying and thermal decomposition of solutions of titanium n-butoxide in 2-propanol and titanium tetrachloride in methanol+water and also by anodization; the reduction was also studied at Ebonex®, a conducting ceramic consisting mainly of Ti5O9. In all cases, the reduction of oxygen occurs largely by a 4e- reaction to water and the reaction occurs at potentials close to -1.0 V vs. SCE. Cyclic voltammetry in the absence of oxygen shows that, at these potentials, the surfaces undergo reduction and the electrochemistry of the Fe(CN)64- /Fe(CN)63- couple has been used to probe further the properties of the TiO2 surfaces.

Original languageEnglish
Pages (from-to)273-286
Number of pages14
JournalJournal of Electroanalytical Chemistry
Volume340
Issue number1-2
DOIs
Publication statusPublished - 24 Nov 1992
Externally publishedYes

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ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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