Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 33, Pages 12637-12645Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c04204
Keywords
WO3; BiVO4; Heterojunction; Tannin nickel iron cocatalyst; Photoelectrochemical water splitting
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Funding
- National Natural Science Foundation of China [51772249, 51821091]
- Fundamental Research Funds for the Central Universities [G2017KY0308, 3102019JC005]
- Natural Science Foundation [2018JM5092, 2019JLM-26]
- Innovation Program for Talent [2019KJXX-066]
- Postdoctoral Program of Shaanxi Province [2018BSHTDZZ16]
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Achieving enhanced photoelectrochemical (PEC) activity and stability of a photoanode remains as a formidable challenge. In this study, a porous tannin nickel iron complex coated WO3/BiVO4 heterojunction (WO3/BiVO4@TANiFe) is constructed to achieve enhanced PEC activity and stability. The in situ construction of a type-II heterostructure is highly beneficial for broad visible light utilization and efficient separation of photogenerated carriers. In addition, the intact coating of ultrathin tannin nickel iron nanolayer could not only accelerate the reaction kinetics of water oxidation but also safeguard the semiconductors from photocorrosion during the PEC reaction. As a result, the as-designed WO3/BiVO4@TANiFe ternary photoelectrode exhibits an outstanding photocurrent density of 3.7 mA cm(-2) at 1.23 V vs RHE with substantially enhanced running durability at high photocurrent density. The present study would provide a rational route for developing highly active and stable photoanodes for solar-energy conversion applications.
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