PHOTOELECTROCHEMISTRY OF CADMIUM-SULFIDE .1. REANALYSIS OF PHOTOCORROSION AND FLAT-BAND POTENTIAL
PHOTOELECTROCHEMISTRY OF CADMIUM-SULFIDE .1. REANALYSIS OF PHOTOCORROSION AND FLAT-BAND POTENTIAL
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DOI：
10.1021/j100323a032
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发表时间：
1988-06-16
影响因子：
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通讯作者：
KASTENING, B
中科院分区：
文献类型：
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作者：
MEISSNER, D;MEMMING, R;KASTENING, B
硫化镉是用于太阳能转换系统的最佳特性半导体之一。迄今为止，有关这类材料的光物理和光化学行为的论文已发表500多篇。对这种材料感兴趣的一个主要原因是带边在水溶液中的位置，这被认为比几乎所有其他已知的半导体更适合于通过太阳能将水直接分解为氢和氧，这是许多光化学家和光电化学家的主要目标。2根据文献报道，CdS在水溶液中的平带电位似乎是水裂解反应的理想电位。如果使用催化剂来降低该反应的过电位，则CdS表面处的导带的位置位于足以还原水的阴极电位。CdS的氢析出很容易观察，这已经被多次证明。3此外，报道的CdS的平带位置意味着价带中的空穴应该有足够的过电位来氧化水。事实上，从CdS生产氧气的报道已经有几次了。4然而，
Cadmium sulfide is one of the best characterized semiconductors for use in solar-energy conversion systems. Far more than 500 papers concerning the photophysical and photochemical behavior of this material havebeen published. Onemain reason for the interest in this material is the position of the band edges in aqueous solution, which is believed to be more suitable than that of nearly all other known semiconductors for the direct splitting of water into hydrogen and oxygen by solar energy, 1 which is the main goal of many photochemists and photoelectrochemists. 2 According to the literature the flat-band potentialof CdS in aqueous solution seems to be ideal for the water-splitting reaction. The position of the conduction band at the surface of CdS is located at sufficiently cathodic potential to reduce water if a catalyst is used to reduce the overpotential of this reaction. Hydrogen evolution from CdS is easy to observe, as has been proven many times. 3 Furthermore, the reported flat-band position of CdS means that there should be a sufficient overpotential for holes in the Valence band tooxidize water. Oxygen production from CdS has indeed been reported a few times. 4 However, the