Oxidative energy storage ability of a TiO2-Ni(OH)2 bilayer photocatalyst

Yukina Takahashi, Tetsu Tatsuma

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)


A TiO2-coated indium tin oxide electrode was further coated with Ni(OH)2 by electrodeposition to obtain a TiO2-Ni(OH) 2 bilayer film. Upon irradiation of the bilayer film with UV light in a pH 10 buffer, the Ni(OH)2 layer was oxidized, and it turned from colorless to brown; oxidative energy was stored in the layer. The potential of the oxidative energy thus stored was about +0.7 V versus Ag|AgCl. The stored energy could be reversibly taken out of the film by chemical and electrochemical means. The photooxidized Ni(OH)2 was rereduced by alcohols, aldehydes, phenol, I-, H2O2, formate, and acetone.

Original languageEnglish
Pages (from-to)12357-12361
Number of pages5
Issue number26
Publication statusPublished - Dec 20 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry


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