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Z-Scheme Modulated Charge Transfer on InVO4@ZnIn2S4 for Durable Overall Water Splitting
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杨
H
DOI：10.1002/smll.202207031.png)
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Abstract
En 中文
The charge transfer within heterojunction is crucial for the efficiency and stability of photocatalyst for overall water splitting (OWS). Herein, InVO4 nanosheets have been employed as a support for the lateral epitaxial growth of ZnIn2S4 nanosheets to produce hierarchical InVO4@ZnIn2S4 (InVZ) heterojunctions. The distinct branching heterostructure facilitates active site exposure and mass transfer, further boosting the participation of ZnIn2S4 and InVO4 for proton reduction and water oxidation, respectively. The unique Z-scheme modulated charge transfer, visualized by simulation and in situ analysis, has been proved to promote the spatial separation of photoexcited charges and strengthen the anti-photocorrosion capability of InVZ. The optimized InVZ heterojunction presents improved OWS (153.3 mu mol h(-1) g(-1) for H-2 and 76.9 mu mol h(-1) g(-1) for O-2) and competitive H-2 production (21090 mu mol h(-1) g(-1)). Even after 20 times (100 h) of cycle experiment, it still holds more than 88% OWS activity and a complete structure.
Keywords:
anti-photocorrosion capability
charge transfer
internal interfacial electric field
overall water splitting
Z-scheme heterojunction
Journal
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12.1
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3.0W
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16.4W
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