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Issue 8, 2016
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An electrochemical method to enhance the performance of metal oxides for photoelectrochemical water oxidation

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Abstract

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.

Graphical abstract: An electrochemical method to enhance the performance of metal oxides for photoelectrochemical water oxidation

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Publication details

The article was received on 21 Dec 2015, accepted on 28 Jan 2016 and first published on 29 Jan 2016


Article type: Communication
DOI: 10.1039/C5TA10477G
Citation: J. Mater. Chem. A, 2016,4, 2849-2855
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    An electrochemical method to enhance the performance of metal oxides for photoelectrochemical water oxidation

    G. Wang, Y. Yang, Y. Ling, H. Wang, X. Lu, Y. Pu, J. Z. Zhang, Y. Tong and Y. Li, J. Mater. Chem. A, 2016, 4, 2849
    DOI: 10.1039/C5TA10477G

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