缺陷驱动的金属有机框架的逐步激活 走向工业级别的离子交换膜水电解
Jian Zhou1, Shuai Qiu2, Xianbiao Hou2
1Ocean University of China, School of Materials Science and Engineering, Qingdao, CHINA.
Angewandte Chemie (International ed. in English)
|May 15, 2025
概括
有缺陷的金属有机框架 (MOFs) 允许对增强氧演化反应 (OER) 催化进行控制的阶段性激活. 这一策略提高了水电解中的催化剂性能和稳定性.
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) 是氧演化反应 (OER) 中结构-活性关系研究的模型催化剂.
- 由于复杂的吸附物行为和在动态条件下的转移,阐明OER机制具有挑战性.
研究的目的:
- 为有缺陷的基于Co的MOF (D/CoFc-MOF) 开发一个缺陷驱动的逐步激活策略,以控制吸附行为.
- 通过量身定制的协调几何和电子配置,阐明催化机制并增强OER活动.
主要方法:
- 有缺陷的共同基MOF (D/CoFc-MOF) 的合成.
- 操作特征,以研究在OER期间的逐步激活过程.
- 理论计算用于研究活性站点和中间体之间的电子相互作用.
主要成果:
- D/CoFc-MOF表现出一种独特的阶段性激活途径:原始的MOF → α-FeOOH → 活跃的CoFeOOH.
- 缺陷的MOF衍生的CoFeOOH显示了与OOH*中间体的强化电子相互作用,降低了反应障碍.
- 在离子交换膜水电解中,D/CoFc-MOF阳极在1.69V时达到1A cm-2的电压,并稳定运行了300小时.
结论:
- 缺陷驱动的逐步激活策略有效地控制了吸附剂的行为,并增强了OER活动.
- 这种方法提供了对设计催化剂的基本见解,这些催化剂经历动态相位转换以改善电催化剂.
- 开发的D/CoFc-MOF显示了在水电解中的工业应用的巨大潜力.
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