通过内在修改以循环添加二氧化碳和二氧化二氧化的他基材料
Hongguang Liang1,2, Xiaoyun Li1, Junwei Wang1
1Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.
ChemPlusChem
|April 10, 2024
概括
基于酸的碳化物催化剂有效地将二氧化碳 (CO2) 和二氧化二氧化物转化为循环碳酸盐. 在450°C准备的催化剂显示出高性能,选择性和稳定性.
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:
- 碳化物 (CN) 材料是利用二氧化碳的有吸引力的催化剂.
- 有效地将二氧化碳转化为有价值的产品是可持续化学的一个关键目标.
- 用环氧化物循环添加二氧化碳是一种有希望的循环碳酸盐的途径.
研究的目的:
- 设计和合成具有不同聚合度的化碳化物材料.
- 研究这些材料在用1,4-butanediol diglycidyl ether (BDODGE) 循环添加二氧化碳时的催化性能.
- 阐明结构-活性关系和反应机制.
主要方法:
- 设计与肝相关的碳化物催化剂的内部修改策略.
- 在140°C20小时内对循环添加反应进行催化试验.
- 催化剂性质的表征和反应产物的分析.
- 基于实验结果提出的反应机制.
主要成果:
- 碳化物催化剂在450°C (CN-450-W) 制备,含有胺水合物,表现出最佳性能.
- 在没有辅助催化剂或溶剂的情况下,实现了93.1%的环氧化物转化和99.3%的循环碳酸盐选择性.
- 高活性归因于多孔结构和氨基和-OH组的协同作用;水起着至关重要的作用.
- 催化剂CN-450-W显示出非常好的可回收性.
结论:
- 与赫普他相关的碳化物材料是二氧化碳循环添加与二氧化二氧化碳的有效催化剂.
- 在450°C准备的催化剂由于其独特的结构和活性位点,显示出卓越的性能.
- 水对于维持催化剂结构和活性至关重要,使有效和可持续的循环碳酸盐合成成为可能.
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