在电化学氧进化反应过程中,基于和铁的金属有机框架的结构重建
Thomas Doughty1, Andrea Zingl2, Maximilian Wünschek2
1School of Chemistry, University of Lincoln, Green Lane, Lincoln LN6 7DL, U.K.
ACS applied materials & interfaces
|July 23, 2024
概括
金属有机框架 (MOF) 转化为活性金属氧化电催化剂,用于氧化演化反应 (OER). 这种MOF衍生的催化剂显示出高的OER活性,强调MOF作为催化剂设计的有希望的前体.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 金属有机框架 (MOF) 被探索为氧化演化反应 (OER) 的电催化剂.
- 有关MOF电化学稳定性和催化过程中的结构变化存在根本问题.
- MOFs提供了具有定义活性位点的分子和异质催化剂之间的独特混合结构.
研究的目的:
- 研究基MOF (CoFc-MOF) 在基介质中的OER过程中的结构转化.
- 确定MOF作为前催化剂的作用,并了解它们的重组机制.
- 评估MOF衍生的催化剂的OER性能.
主要方法:
- 表面生长的CoFc-MOF在性电解质中接受了OER.
- 使用现场和现场特征技术来研究结构演变.
- 测量电化学性能是使用循环电压测量和时测量等技术进行的.
主要成果:
- 在OER条件下,CoFc-MOF正在经历两阶段的结构转型.
- MOF重组为金属氧化氧化物阶段,作为活性OER催化剂.
- 在泡上使用的MOF衍生的金属氧化催化剂在10 mA cm−2的OER时达到190 mV的超电位.
结论:
- MOFs可以作为预催化剂,转化为高度活跃的电催化剂.
- 了解电催化过程中MOF的结构演变对于催化剂设计至关重要.
- MOFs是开发先进的OER催化剂的有价值的前体.
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