通过具有缺陷低协调Cu-N动机的单原子催化剂促进太阳能驱动的CO2转化为乙醇
Hainan Shi1,2, Yan Liang1, Jungang Hou1
1State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials, PSU-DUT Joint Center for Energy Research, Dalian University of Technology, Dalian, 116024, China.
Angewandte Chemie (International ed. in English)
|May 17, 2024
概括
一种新型的碳化物支持的铜单原子催化剂 (Cu-N2-V) 显著提高了太阳能燃料的生产. 这种催化剂可实现高选择性和活性,将二氧化碳 (CO2) 转化为乙醇,为可持续能源解决方案提供了一个有前途的途径.
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.
- 摄影化学的使用.
背景情况:
- 基于铜的催化剂在CO2光降解到C2+太阳能燃料方面表现有前途.
- 现有催化剂的活性和选择性较低,限制了它们的实际应用.
- 开发高效的催化剂对于可持续的太阳能燃料生产至关重要.
研究的目的:
- 为了开发一种高性能碳化物支持的Cu单原子催化剂,用于CO2光降解.
- 为了研究促进乙醇生产的催化剂的结构-活性关系.
- 阐明反应机制并确定C-C合的关键中间体.
主要方法:
- 一种碳化物支持的Cu单原子催化剂的合成,具有缺陷的Cu-N2基因 (Cu-N2-V).
- 对CO2减少到乙醇的光催化评价.
- 实验性表征和密度函数理论 (DFT) 计算,以了解催化机制.
主要成果:
- -N2V催化剂对CO2降解为乙醇表现出优异的光催化活性,生产率为69.8μmol g-1 h-1和97.8%的选择性.
- 缺陷的Cu-N2配置增强了电子丰富和移位,改善了光活性.
- +/2+等价态的共存促进了CO2的激活和CO吸附,通过*CO-*CO二分化促进了C-C合.
结论:
- 缺陷的Cu-N2-V催化剂对于太阳能驱动的CO2转化为乙醇非常有效.
- 催化剂的空洞微观结构增强了光吸附和电荷分离.
- 该研究提供了关于C-C合机制和反应期间的价值状态变化的见解.
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