An electrochemical method to enhance the performance of metal oxides for photoelectrochemical water oxidation
An electrochemical method to enhance the performance of metal oxides for photoelectrochemical water oxidation
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DOI：
10.1039/c5ta10477g
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发表时间：
2016-02
影响因子：
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通讯作者：
Gongming Wang;Yi Yang;Yichuan Ling;Hanyu Wang;Xihong Lu;Ying-Chih Pu;J. Zhang;Y. Tong;
中科院分区：
文献类型：
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作者：
Gongming Wang;Yi Yang;Yichuan Ling;Hanyu Wang;Xihong Lu;Ying-Chih Pu;J. Zhang;Y. Tong;
最近已经证明，许多金属氧化物的光电化学性能可以通过受控地引入缺陷（例如氧空位）来可控地增加它们的载流子密度而得到显著改善。缺陷的产生可以通过不同的合成方法来实现，包括氢化、在缺氧环境中的热处理、化学还原、离子轰击和电化学还原。在这里，我们报告了一个一般的策略，制备缺氧的金属氧化物，包括WO3，TiO 2（金红石和金红石），BiVO 4，和ZnO，通过电化学诱导形成的低价金属物种。这些经电化学处理的金属氧化物显示出显著增强的光活性，这是电荷注入和电荷分离效率提高的结果。在这项工作中报道的电化学方法代表了一种简单，快速，高度可扩展和安全的方法来制备高性能的金属氧化物光阳极。
It has recently been demonstrated that the photoelectrochemical performance of a number of metal oxides can be substantially improved by controllably increasing their carrier densities through controlled introduction of defects such as oxygen vacancies. The creation of defects can be achieved via different synthetic methods, including hydrogenation, thermal treatment in oxygen deficient environment, chemical reductions, ion bombardment and electrochemical reductions. Here we report a general strategy to prepare oxygen-deficient metal oxides, including WO3, TiO2 (rutile and anatase), BiVO4, and ZnO, by electrochemically induced formation of low valent metal species. These electrochemically treated metal oxides show significantly enhanced photoactivity, as a result of improved charge injection and charge separation efficiency. The reported electrochemical method in this work represents a simple, rapid, highly scalable and safe approach to prepare high performance metal oxide photoanodes.