原位构建具有增强光催化制氢性能的S-scheme CuSe/TiO2异质结

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Molecular Catalysis Pub Date : 2025-05-14 DOI:10.1016/j.mcat.2025.115204

Yi Zhu , Binghao Wang , Junbo Zhong , Jianzhang Li , Xingwen Zheng , Congxue Tian

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引用次数: 0

摘要

构建异质结通过促进电荷的有效分离和转移来提高光催化制氢性能被认为是可行的策略。本研究采用水热法原位制备了s型CuSe/TiO2异质结光催化剂，用于光催化裂解水制氢。与对照TiO2相比，CuSe/TiO2异质结具有更高的产氢速率。其中，4% CuSe/TiO2的产氢速率达到1318 μmolg−1h−1，是参比TiO2的5.6倍，且CuSe/TiO2异质结具有优异的稳定性。产氢性能的增强是由于CuSe和TiO2形成的S-scheme异质结，具有有效的电荷分离和转移以及较强的氧化还原能力。根据实验结果验证了s -方案的电荷传递机制。该研究为合理设计新型tio2基异质结构提供了有价值的参考。

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In-situ construction of S-scheme CuSe/TiO2 heterojunctions with enhanced photocatalytic H2 production performance

Constructing heterojunctions to enhance photocatalytic hydrogen production performance by promoting effective separation and transfer of charges is considered as a feasible strategy. In this study, S-scheme CuSe/TiO₂ heterojunction photocatalysts were in-situ prepared by a facile hydrothermal method for hydrogen production from photocatalytic splitting water. Compared with the reference TiO₂, CuSe/TiO₂ heterojunctions exhibit a higher hydrogen production rate. In particular, the hydrogen production rate on 4 % CuSe/TiO₂ reaches 1318 μmolg⁻¹h⁻¹, which is 5.6 times higher than that on the reference TiO₂, CuSe/TiO₂ heterojunctions also exhibit excellent stability. The enhanced hydrogen production performance is attributable to the S-scheme heterojunctions formed by CuSe and TiO₂, which exhibit effective separation and transfer of charges and strong redox capability. The S-scheme charges transfer mechanism was validated relying on the experimental outcomes. This research offers a valuable reference for rational design of new TiO₂-based heterostructures.

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods