Bromine Atoms Decorated Pyene-based Covalent Organic Frameworks for Accelerated Photocatalytic H2 Production

文献类型： 外文期刊

第一作者： Deng, Xile

作者： Deng, Xile;Bai, Lianyang;Gao, Nan;Gao, Nan

作者机构：

关键词： Br Atoms decorated; covalent organic frameworks; Exciton binding energy; Photocatalytic H-2 Production

期刊名称：SMALL （ 影响因子：13.3； 五年影响因子：13.2 ）

ISSN： 1613-6810

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Designing materials with low exciton binding energy is an efficient way of improving the hydrogen production performance of COFs(Covalent Organic Frameworks. Here, it is demonstrated that the strategy of decorating bromine atoms on Pyene-based COFs can achieve elevated photocatalytic H-2 evolution rates (HER = 13.61 mmol g(-1)h(-1)). Low-temperature fluorescence and time-resolved fluorescence spectroscopy (TRPL) indicate that the introduction of bromine atoms can significantly suppress charge recombination. DFT (Density Functional Theory) calculation clarified that the C atoms adjacent to Br are the active sites with a reduced energy barrier in the process of formatting H intermediate species (H*). The modification strategy of Br atoms in COF furnishes a new medium for exploiting exquisite photocatalysts.

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