A New Class of Molecular-Based Photoelectrochemical Cell for Solar Hydrogen Production Consisting of Two Mesoporous TiO2 Electrodes
A New Class of Molecular-Based Photoelectrochemical Cell for Solar Hydrogen Production Consisting of Two Mesoporous TiO2 Electrodes
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DOI：
10.1021/acsaem.8b01992
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发表时间：
2019-01
影响因子：
6.4
通讯作者：
K. Morita;K. Sakai;Hironobu Ozawa
中科院分区：
文献类型：
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作者：
K. Morita;K. Sakai;Hironobu Ozawa
研究了一类新型的分子光电化学电池，该电池由多吡啶钌光敏剂（Ru-qpy）修饰的TiO 2基光阳极和铂卟啉析氢催化剂修饰的TiO 2基阴极组成，表明在光阳极处的TiO 2的导带处的电子积累经由来自Ru-的电子注入而促进。QPY以及通过牺牲供体的空穴清除。我们的研究首次揭示了在光阳极处的TiO 2的费米能级中给出的向上移动提供了流动电流所需的电动势，从而即使在没有施加外部电偏压的情况下也能从水中产生太阳能氢。
A new class of molecular-based photoelectrochemical cell for solar hydrogen production consisting of a TiO2-based photoanode modified with a polypyridyl ruthenium photosensitizer (Ru-qpy) and a TiO2-based cathode modified with a platinum porphyrin H2 evolution catalyst has been investigated, showing that the electron accumulation at the conduction band of TiO2 at the photoanode is promoted via electron injection from the Ru-qpy together with hole scavenging by a sacrificial donor. Our study here for the first time unveils that the upward shift given in the Fermi level of the TiO2 at the photoanode provides an electromotive force required to flow electrical current leading to solar hydrogen production from water even without applying external electrical bias.