BiOI/WO3 photoanode with enhanced photoelectrochemical water splitting activity
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This work reports on a novel BiOI/WO3 composite photoanode, which was fabricated by depositing BiOI onto a WO3 nanoflake electrode through a electrodeposition method. The photoelectrochemical (PEC) activity of the BiOI/WO3 electrode for water splitting under visible-light irradiation was evaluated. The results show that the BiOI/WO3 photoanode achieved a photocurrent density of 1.21 mA·cm–2 at 1.23 V vs. reversible hydrogen electrode (RHE), which was higher than that of the bare WO3 nanoflake electrode (0.67 mA·cm–2). The enhanced PEC acticity of BiOI/WO3 for water splitting can be attributed to the expansion of light absorption range as well as the facilitated separation of photo-generated carriers.
Keywordsphotoelectrochemistry WO3 BiOI water splitting
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This work was financially supported by the National Natural Science Foundation of China (NSFC) Major International (Regional) Joint Research Project NSFC-SNSF (Grant No. 51661135023), NSFC (Grant No. 21673091), the National Basic Research Program (973 Program) of China (No. 2014CB643506), the Fundamental Research Funds for the Central Universities (HUST: 2016YXMS031), the Director Fund of the WNLO, the Open Funds of the State Key Laboratory of Electroanalytical Chemistry (No. SKLEAC201607), Key Scientific and Technological Project of Henan Province (No. 182102311084). The authors thank the Analytical and Testing Center of HUSTand the Center for Nanoscale Characterization & Devices (CNCD), WNLO-HUST for the measurements.
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