光催化
溴
共价键
材料科学
密度泛函理论
荧光
激子
纳米技术
光谱学
光化学
化学物理
催化作用
有机化学
计算化学
化学
冶金
物理
量子力学
作者
Xile Deng,Nan Gao,Lianyang Bai
出处
期刊:Small
[Wiley]
日期:2024-03-01
卷期号:20 (30)
被引量:4
标识
DOI:10.1002/smll.202311927
摘要
Abstract 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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