Abstract

Abstract Electrode characteristics of strontium titanate (SrTiO3) 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 TiO2 electrode, can proceed also at the SrTiO3 electrode whose anodic dissolution being negligible. Although the photosensitivity of the SrTiO3 electrode is confined to a little shorter wavelength region than that of the TiO2 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 TiO2 electrode, the electrochemical photocell consisted of the SrTiO3 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.

Keywords

ElectrodeChemistryPhotoelectrochemistryAnodeElectrolyteElectrochemistryInorganic chemistryCathodePlatinumSemiconductorStandard electrode potentialAbsorption (acoustics)Palladium-hydrogen electrodePhotocurrentStrontium titanateWorking electrodeElectrode potentialOptoelectronicsMaterials scienceComposite materialCatalysis

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Publication Info

Year
1976
Type
article
Volume
49
Issue
2
Pages
355-358
Citations
161
Access
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Tadashi Watanabe, Akira Fujishima, Kenichi Honda (1976). Photoelectrochemical Reactions at SrTiO3 Single Crystal Electrode. Bulletin of the Chemical Society of Japan , 49 (2) , 355-358. https://doi.org/10.1246/bcsj.49.355

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DOI
10.1246/bcsj.49.355