选择性CO2转化为乙醇的金属有机框架中的Cu中心的光激活
Lingzhen Zeng1, Zhiye Wang1, Yongke Wang1
1College of Chemistry and Chemical Engineering, iCHEM, State Key Laboratory of Physical Chemistry of Solid Surface , Xiamen University , Xiamen 361005 , People's Republic of China.
Journal of the American Chemical Society
|December 17, 2019
概括
将二氧化碳 (CO2) 转化为乙醇是一个挑战. 这项研究使用光来激活金属有机框架 (MOF) 中的铜位点,使得稳定和选择性CO2化为乙醇.
科学领域:
- 催化剂
- 材料科学
- 摄影化学
背景情况:
- 将二氧化碳化为乙醇需要选择性C-C和C-O键的形成.
- 铜 (I) (CuI) 中心是有效的催化剂,但在反应条件下不稳定.
研究的目的:
- 为二氧化碳化产生和稳定CuI物种开发一种方法.
- 在金属有机框架 (MOF) 中利用光激活来增强催化活性.
主要方法:
- 使用Cu-Ru-MOF混合材料.
- 使用低强度的光来通过光诱导的电子转移产生活性CuI物种.
- 使用X射线光电子和短暂吸收光谱进行表征.
主要成果:
- 光激活成功生成并稳定了MOF中的CuI物种.
- 选择性化Cu-Ru-MOF混合 CO2 成为高活性乙醇 (9650 μmol gCu-1 h-1).
- 在150°C时,反应条件包括2 MPa的H2/CO2 (3:1).
结论:
- 低强度的光可以有效地产生和稳定具有催化作用的CuI物种.
- 这种光化学驱动的过程为二氧化碳转化为乙醇提供了可持续的途径.
- 在二氧化碳利用方面,Cu-Ru-MOF系统显示出有前途的工业应用潜力.
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