在COF催化N转移中脱离局部的丧的易斯对,用于尿素光合作用
Haozhen Wang1, Lu Song1, Mengqiu Xu1
1Laboratory of Advanced Materials, State Key Laboratory of Porous Materials for Separation and Conversion, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China.
Angewandte Chemie (International ed. in English)
|September 23, 2025
概括
这项研究引入了一种新的化铁基共价有机框架 (Fe/F-COF) 光催化剂. 这种催化剂通过C-N合有效地将二氧化碳和酸盐转化为尿素,为碳利用和环境修复提供了可持续的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 绿色化学 绿色化学
背景情况:
- 通过二氧化碳和酸盐的C-N合合成尿素是碳利用和环境修复的可持续目标.
- 由于竞争的还原反应,这一过程具有挑战性.
- 硬软酸原理指导选择性C-N合的催化剂的设计.
研究的目的:
- 开发一种光催化剂,可以选择性地促进尿素合成的C-N合.
- 为了抑制竞争的还原反应,在铁-基因氧丧的易斯对 (FLP) 中使用电子移位.
- 为增强光催化活性设计基于化铁的共价有机框架 (Fe/F-COF).
主要方法:
- 制造一种化Fe-β-ketoenamine结合的共价有机框架 (Fe/F-COF) 光催化剂.
- 通过功能化对电子结构的调制,以创建电子移位的FLP.
- 实验和计算研究来分析易斯酸度/度和反应机制.
主要成果:
- Fe/F-COF表现出精确控制的Fe-keto氧空间间距 (3.4 Å) 和电子移位的FLP.
- 的功能化增强了Fe位点的易斯酸性和氧位点的基本性,促进了CO2和NO3的激活.
- 实现了高尿素产率93μmolgcat.-1h-1的高尿素产率,表面量子产率在400nm时为1.1%.
结论:
- 设计的Fe/F-COF有效地抑制了竞争性减少,并促进了尿素合成的选择性C-N合.
- 在Fe-keto氧FLP中,电子移位调制的策略对于高效的光催化是至关重要的.
- 这项工作为光催化尿素生产带来了有前途的进展,超越了现有的系统.
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