SEMICONDUCTING OXIDE ANODES IN PHOTOASSISTED ELECTROLYSIS OF WATER.

Harold H Kung, H. S. Jarrett, A. W. Sleight, A. Ferretti

Research output: Contribution to journalArticle

230 Citations (Scopus)

Abstract

The electrochemical properties of semiconducting anodes of TiO//2, SrTiO//3, BaTiO//3, Fe//2O//3, CdO, CdFe//2O//4, Wo//3, PbFe//1//2O//1//9, 2Ti//1//. //5W//0//. //5O//6//. //5, Hg//2Ta//2O//7, and Hg//2Nb//2O//7 in photoassisted electrolysis of water were determined. All of these oxides formed a rectifying junction with the electrolyte and anodic photocurrents were generated only with larger-than-band-gap illumination. For Fe//2O//3, the optical absorption spectrum was different from the photoelectrochemical spectrum due to crystal field transitions. These oxides were found to be stable over certain range of pH. In a given electrolyte, the flatband potential V//f//b varied linearly with the band gap. A good correlation was obtained between V//f//b and the calculated heat of formation of the oxide per metal atom per metal-oxygen bond, but not between V//f//b and the calculated Fermi energy of the oxide.

Original languageEnglish
Pages (from-to)2463-2469
Number of pages7
JournalJournal of Applied Physics
Volume48
Issue number6
DOIs
Publication statusPublished - Jun 1977

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

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