在高氧化状态中反向捕捉孤立的原子,以加速氧的进化反应动力学
Yang Li1,2, Tingting Bo3, Shouwei Zuo2
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China.
Angewandte Chemie (International ed. in English)
|August 28, 2023
概括
研究人员开发了一种原子捕获策略,用于制造氧化演化反应 (OER) 的先进电催化剂. 这种方法通过精确控制催化剂结构和组成,提高了水分解效率.
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:
- 为氧化演化反应 (OER) 开发高效的电催化剂对于能量转化和储存至关重要.
- 不同质的催化剂的结构复杂性阻碍了对OER机制的理解.
研究的目的:
- 开发一种可控制的原子捕获策略,用于合成先进的电触媒.
- 阐明这些催化剂的动态结构演变和OER机制.
主要方法:
- 可控制的原子捕获策略使用无形MoOx装饰的CoSe2.
- 操作特征来研究催化剂重建.
- 密度函数理论 (DFT) 计算以了解电子结构.
主要成果:
- 从a-MoOx @CoSe2 的超快速自我重建到Mo-CoOOH.
- 在高氧化状态下的Mo物种被困在CoOOH网格中.
- 对于OER,Mo-CoOOH在100 mA cm-2时实现了297 mV的低超电位.
结论:
- 原子捕获策略使原子分散的电催化剂能够有效合成.
- 由于与Mo.电子合,Mo-CoOOH表现出显著增强的OER动力学.
- 这种方法为高效水分裂催化剂提供了新的途径.
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