在多元金属有机框架中生成选址结构空白,用于增强催化
Junyi Wang1, Yin Rao1, Yichen Wu1
1Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China.
ACS applied materials & interfaces
|June 21, 2023
概括
研究人员通过选择性地去除部位,在金属有机框架 (MOF) 中创造了结构空缺. 这增强了孔径大小和催化活性,同时保留了化学反应的活性铜部位.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术 纳米技术
背景情况:
- 在金属有机框架 (MOF) 中的结构空缺可以调整孔的参数.
- 传统的空缺生成通常会导致由于非选择性解离而导致活跃地点的丧失.
研究的目的:
- 在多国MOF (FDM-6) 中实现特定地点的空缺职位.
- 为了增强毛孔大小和催化活性,同时保持活跃部位.
主要方法:
- 在FDM-6中选择性水解弱Zn─碳酸盐链接.
- 粉末X射线衍射用于原子占用率分析.
- 通过含水量和水解时间调节表面积和孔径.
主要成果:
- 超过56%的Zn(II) 站点被空置,保留了氧化还原活性Cu站点.
- 选择地点的空缺创建了介质孔,促进了客分子的运输.
- 与原始MOF相比,空缺的FDM-6在体积大的芳香醇氧化中表现出增强的催化活性.
结论:
- 多国MOF的特定地点空缺工程可以在不牺牲活跃地点的情况下扩大孔隙.
- 这种方法为开发具有更好的催化性能的先进MOF材料提供了战略.
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