在金属有机框架中围绕单原子金属位点进行特定位置的微环境调制,以促进催化
Shuaishuai Hu1, Jiajia Huang1, Ming-Liang Gao1
1Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Angewandte Chemie (International ed. in English)
|November 7, 2024
概括
具有在金属有机框架 (MOF) 中固定的铜 (Cu) 原子的单原子催化剂 (SAC) 显示出多种多样的化活性. 在MOF上的远程功能组调整了Cu电子结构,提高了催化性能.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 催化金属位点的协调环境对于单原子催化剂 (SAC) 来说至关重要.
- 了解更高协调球的微环境如何影响SAC催化仍然是一个挑战.
研究的目的:
- 调查特定位置的微环境对基于铜的SACs的催化活性的影响.
- 探索金属有机框架 (MOF) 上的功能组在调节 SAC 性能中的作用.
主要方法:
- 通过将单个 Cu 原子固定在 UiO-66-X MOF 上,合成基于铜的 SAC (Cu1/UiO-66-X).
- 在基因的化过程中对催化活性的评估.
- 使用实验和计算方法来分析结构-活动关系.
主要成果:
- 1/UiO-66-X SACs在基化中表现出明显的催化活性.
- 活动顺序:Cu1/UiO-66-NO2 > Cu1/UiO-66 > Cu1/UiO-66-NH2.2. 活动顺序:Cu1/UiO-66-NO2 > Cu1/UiO-66 > Cu1/UiO-66-NH2.
- 1/UiO-66-NO2的效率比1/UiO-66-NH2高3.5倍,乙烯转化率达到92%.
结论:
- 由MOF功能组决定的特定位置的微环境有效调节单个Cu原子的电子特性.
- 模块化的电子结构影响产品脱附,导致在水电化反应中增强催化作用.
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