链接器补偿金属有机框架,用于双功能氧气电催化
Yi Jiang1, Ya-Ping Deng1, Ruilin Liang1
1Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
Journal of the American Chemical Society
|February 22, 2022
概括
研究人员开发了一种用于空气电池的新金属有机框架 (MOF) 催化剂. 这种策略通过改变中间吸附来提高电池性能,从而提高稳定性和效率.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 金属有机框架 (MOF) 为催化提供可调的协调化学.
- 了解催化机制对于优化储能装置至关重要.
研究的目的:
- 引入一个链接器补偿策略,用于Co-Fe有氧化物伊米达酸框架 (CFZ) MOF.
- 通过催化剂改造来提高空气电池的性能.
主要方法:
- 通过使用链接器补偿策略,合成和表征了修改后的Co-Fe热氧化伊米达酸框架 (CFZ).
- 研究了空气电池中修改后的CFZ的电化学性能.
- 使用理论建模和系统性表征来阐明机制.
主要成果:
- 在 35 mA cm-2 实现 0.88 V 的小放电-充电电压差.
- 在500多小时内表现出异常稳定性,每小时色率低于0.01%.
- 确定S桥接异质链接器补偿不和金属节点,改变电子结构.
结论:
- 链接器补偿策略显著提高了空气电池的性能.
- 修改后的电子结构为双功能氧气电催化剂的中间体提供了有利的吸附/脱附.
- 具有量身定制的协调化学的CFZMOF对先进的储能应用具有前景.
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