Nanoflower-like Mo1.8W0.1S modified covalent organic framework as an efficient ohmic junction for enhanced photocatalytic hydrogen evolution

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-09-26 DOI:10.1016/j.apcata.2025.120606

Lu Ding , Minjun Lei , Zhiliang Jin

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引用次数: 0

Abstract

Mo_1.8W_0.1S with metal-like properties, excellent electrical conductivity and abundant active sites modifies the Covalent Organic Framework (COF) through its nanoflower structure to enhance photocatalytic performance. The performance of COF-OH-3 and Mo_1.8W_0.1S composite catalyst in photocatalytic hydrogen evolution reaction is investigated. The hydrogen evolution amount of the composite was found to be 2.5 times higher than that of the single COF-OH-3 and 2166 times higher than that of pure Mo_1.8W_0.1S. The nanosheet structure of COF-OH-3 is wrapped around the surface of Mo_1.8W_0.1S, which acts as an electron acceptor by receiving electrons transferred from COF-OH-3. The ohmic junction between COF-OH-3 and Mo_1.8W_0.1S facilitates electron transfer via an internal electric field, promoting efficient charge separation and transport. Meanwhile, the superior electrical conductivity and catalytic activity of Mo_1.8W_0.1S further promote hydrogen evolution. This study significantly optimizes the efficacy of photocatalytic hydrogen evolution by utilizing the synergistic effect between metal-like and organic framework structures, and provides a new idea for photocatalyst hydrogen evolution, which has a wide application prospect.

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纳米花状Mo1.8W0.1S修饰的共价有机骨架作为增强光催化析氢的有效欧姆结

Mo1.8W0.1S具有类金属性质、优异的导电性和丰富的活性位点，通过其纳米花结构修饰共价有机骨架（COF），增强其光催化性能。研究了COF-OH-3与Mo1.8W0.1S复合催化剂在光催化析氢反应中的性能。该复合材料的析氢量是单一COF-OH-3的2.5倍，是纯Mo1.8W0.1S的2166倍。COF-OH-3纳米片结构包裹在Mo1.8W0.1S表面，作为电子受体接收从COF-OH-3转移过来的电子。COF-OH-3与Mo1.8W0.1S之间的欧姆结促进了电子通过内部电场转移，促进了有效的电荷分离和输运。同时，Mo1.8W0.1S优异的电导率和催化活性进一步促进了析氢。本研究利用类金属与有机骨架结构之间的协同效应，显著优化了光催化析氢的效能，为光催化析氢提供了新的思路，具有广阔的应用前景。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.