构建核心外共价/金属有机框架,用于氧气进化反应
Zhuangyan Guo1,2, Shuai Yang1,2, Minghao Liu2
1School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.
Small (Weinheim an der Bergstrasse, Germany)
|December 6, 2023
概括
氧化演化反应 (OER) 的高活性催化剂是使用共价有机框架 (COFs) 和金属有机框架 (MOFs) 的核心外混合体开发的. 这些新型催化剂在电化学能量储存和转换系统中表现出增强的性能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 氧进化反应 (OER) 对空气电池和水分裂至关重要.
- 由于复杂的四电子转移过程,开发高效的OER催化剂具有挑战性.
- 共价有机框架 (COF) 为催化剂设计提供可调节的结构和明确的位置.
研究的目的:
- 为了证明COF和金属有机框架 (MOF) 的核心外混合体作为有效的OER催化剂.
- 调查COF外和MOF核之间的协同效应,以提高催化活性.
- 为电化学能源应用设计先进的COF提供见解.
主要方法:
- 核心外COF-MOF混合物的合成.
- 对OER的催化剂的电化学表征.
- 理论计算以了解催化机制.
主要成果:
- 与单个COF和MOF相比,COF-MOF核心外混合体表现出更高的OER活动.
- 催化剂达到328mV的超电位和1M KOH中的43.23mVdec-1的Tafel斜率.
- 理论计算确定了Fe位点是由于最佳OOH*结合而导致高活性的主要贡献者.
结论:
- 核心的COF-MOF混合物代表了开发高活性OER催化剂的有希望的战略.
- 在COF和MOF组件之间的协同作用显著提高了催化性能.
- 该研究为设计用于储存和转换能源的基于COF的新型材料提供了有价值的见解.
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