Photoelectrochemical reactions at SrTiO3 single crystal electrode.

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概要

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• Electrode characteristics of strontium titanate (SrTiO<SUB>3</SUB>) single crystal have been investigated under illumination with light of its intrinsic absorption region. It has been found that the photosensitized electrolytic oxidation of water, known heretofore uniquely on the TiO<SUB>2</SUB> electrode, can proceed also at the SrTiO<SUB>3</SUB> electrode whose anodic dissolution being negligible. Although the photosensitivity of the SrTiO<SUB>3</SUB> electrode is confined to a little shorter wavelength region than that of the TiO<SUB>2</SUB> electrode, the formal quantum efficiency of the photosensitized electrolytic oxidation of water is comparable for these two semiconductor electrodes under intrinsic absorption. In contrast to the case of the TiO<SUB>2</SUB> electrode, the electrochemical photocell consisted of the SrTiO<SUB>3</SUB> anode and platinum cathode can work efficiently even when the pH values of the anodic and cathodic compartments are close to each other. This point is discussed in terms of the flatband potential of these semiconductor electrodes.

• 公益社団法人 日本化学会の論文

著者

• Honda Ken-ichi

  Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo

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• Photoelectrochemical reactions at SrTiO3 single crystal electrode.

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