从伪C5对称核心构建萨里拓学共价有机框架,用于增强氧降解反应
Xiaoyu Xu1,2, Shuai Bi3, Shuang Zheng1,4
1Advanced Separation & Conversion on Engineered Nanopore Dynamics Laboratory, Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), Shanghai, 201210, P.R. China.
Angewandte Chemie (International ed. in English)
|September 19, 2025
概括
研究人员开发了具有独特拓的新型二维共价有机框架 (2D COF). 这些无金属的COF显示出高氧减氧反应 (ORR) 的电催化活性,为催化剂设计提供了一条新的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术纳米技术
背景情况:
- 开发2D COF的新拓被有限的构建块所阻碍.
- 现有的COF通常需要异构原子兴奋剂或金属合并以增强功能.
研究的目的:
- 使用伪五倍对称的构建块构建具有前所未有的拓的2D COF.
- 评估这些新型COFs在氧降解反应 (ORR) 中的电催化活性.
主要方法:
- 使用伪五重对称构建块合成二维共价有机框架 (2D COF).
- 对COF结晶度,表面积和孔隙结构的表征.
- 对氧降解反应 (ORR) 性能进行电催化试验.
- 理论计算以了解结构-活动关系.
主要成果:
- 成功合成了具有新型"萨里"拓的COF (TTCD-DA-COF和TTCD-BA-COF).
- 合成的COF具有高结晶度,大面积和独特的梯形孔隙.
- 两种TTCD-DA-COF和TTCD-BA-COF都显示出显著的无金属ORR电催化活性.
- TTCD-DA-COF (短左边) 的表现优于TTCD-BA-COF,其起始电位为0.85V,半波电位为0.78V.
- 理论计算证实在TTCD-DA-COF中OOH*中间形成更容易.
结论:
- 这项工作扩展了COF拓的库,并引入了一个新的设计策略.
- 合成的COF是ORR的高效无金属电催化剂.
- 连接器长度和电子控制是优化COF电催化性能的关键因素.
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