Photoelectrochemical Reactions at SrTiO3 Single Crystal Electrode
Photoelectrochemical Reactions at SrTiO3 Single Crystal Electrode
复制标题
SrTiO3 单晶电极的光电化学反应
DOI：
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发表时间：
1976
期刊：
影响因子：
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通讯作者：
K. Honda
中科院分区：
文献类型：
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作者：
Tadashi Watanabe;A. Fujishima;K. Honda
研究了钛酸锶(SrTiO_3)单晶在光照下的本征吸收区域的电极特性。研究发现，迄今为止在二氧化钛电极上唯一已知的光敏电解氧化水也可以在阳极溶解可以忽略不计的钛酸锶电极上进行。尽管钛酸锶电极的光敏范围比二氧化钛电极略短，但在本征吸收下，这两种半导体电极对水的光敏电解氧化的表观量子效率是相当的。与二氧化钛电极相比，由钛酸锶阳极和铂阴极组成的电化学光电池即使在阳极和阴极的pH值接近的情况下也能有效地工作。这一点从这些半导体电极的平带电势的角度进行了讨论。
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.