Citation: Yue Zhao, Kezhen Qi, Shan Wang, Li Zhao. Enhanced S-scheme charge transfer in COF/Cd_0.95Ni_0.05S heterojunction for efficient photocatalytic hydrogen production[J]. Chinese Chemical Letters, ;2026, 37(11): 112421. doi: 10.1016/j.cclet.2026.112421 shu

Enhanced S-scheme charge transfer in COF/Cd_0.95Ni_0.05S heterojunction for efficient photocatalytic hydrogen production

Yue Zhao ^a ,
Kezhen Qi ^{b, *,} ,
Shan Wang ^{b, *,} ,
Li Zhao ^{a, *,}

a.
Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan 430062, China
b.
College of Pharmacy, Dali University, Dali 671000, China

qkzh2003@aliyun.com

shanwang@dali.edu.cn

zhaoli7376@163.com

Received Date: 8 September 2025
Revised Date: 2 January 2026
Accepted Date: 15 January 2026
Available Online: 17 January 2026

Figures(5)

Photocatalytic water splitting is a promising strategy for sustainable hydrogen production, offering a clean and renewable alternative to fossil fuels. In this work, an S-scheme heterojunction, COF/Cd_0.95Ni_0.05S, was developed which features a large interfacial contact area and efficient charge transfer pathways. Used as photocatalysts for hydrogen evolution, the COF/Cd_0.95Ni_0.05S composite achieves a hydrogen production rate of 750.7 μmol h^-1 g^-1, which is 2.5 times that of Cd_0.95Ni_0.05S and 3753.5 times that of COF alone. Ex-situ/in-situ experiments reveal that the enhanced performance arises from the optimized band structure, which induces a built-in electric field at the heterojunction interface, accelerating charge separation. Ni doping also suppresses CdS photocorrosion by h⁺, while COF provides abundant active sites. These synergistic effects highlight a promising strategy for designing cost-effective and efficient photocatalysts for hydrogen production.
- Photocatalytic hydrogen evolution,
- S-scheme heterojunction,
- Cd_0.95Ni_0.05S,
- Charge separation,
- Built-in electric field
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沈阳化工大学材料科学与工程学院沈阳 110142

Enhanced S-scheme charge transfer in COF/Cd0.95Ni0.05S heterojunction for efficient photocatalytic hydrogen production

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通讯作者: 陈斌, bchen63@163.com

Enhanced S-scheme charge transfer in COF/Cd_0.95Ni_0.05S heterojunction for efficient photocatalytic hydrogen production