WO3/In2S3 S型异质结中通过W-S键的界面电子转移增强光催化产H2O2

doi:10.1016/j.actphy.2026.100357

Abstract

Abstract: Step-scheme (S-scheme) heterojunctions stand out owing to their unique charge transfer mechanism and the maximized redox capacities of photoexcited electrons and holes, and have been widely exploited to address the ever-growing energy crisis and environmental challenges. Herein, noble-metal-free WO₃/In₂S₃ S-scheme heterojunctions have been developed by growing In₂S₃ nanosheets on porous WO₃ nanofibers via interfacial W-S coordination bonds. The W-S bonds formed at the WO₃/In₂S₃ heterointerface construct rapid charge transport channels, accelerate carrier separation, and boost photocatalytic H₂O₂ evolution. The optimized WO₃/In₂S₃ composite (WI-25) delivers an outstanding photocatalytic H₂O₂ yield of 1349.2 μmol g^-1 h^-1. In situ irradiated X-ray photoelectron spectroscopy (ISI-XPS), partial density of states (PDOS) calculations, electron paramagnetic resonance (EPR), and femtosecond transient absorption spectroscopy (fs-TAS) collectively verify the S-scheme charge transfer pathway mediated by interfacial coordination bonds. This work offers a rational strategy for constructing S-scheme heterojunctions with interfacial coordination bonds to improve photocatalytic performance.

Key words: Photocatalysis, S-scheme heterojunction, Interfacial charge transfer, Hydrogen peroxide, Tungsten trioxide

Wenjun Zhu, Jin Shi, Yong Zhang, Panpan Yan, Meng Li, Chuanbiao Bie. Interfacial electron transfer in WO₃/In₂S₃ S-scheme heterojunctions via W-S bonds for enhanced photocatalytic H₂O₂ production[J]. Acta Phys. -Chim. Sin. 2026, 42(11), 100357. doi: 10.1016/j.actphy.2026.100357

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Interfacial electron transfer in WO₃/In₂S₃ S-scheme heterojunctions via W-S bonds for enhanced photocatalytic H₂O₂ production

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Interfacial electron transfer in WO3/In2S3 S-scheme heterojunctions via W-S bonds for enhanced photocatalytic H2O2 production

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Interfacial electron transfer in WO₃/In₂S₃ S-scheme heterojunctions via W-S bonds for enhanced photocatalytic H₂O₂ production