析氧
双金属片
电负性
卤素
催化作用
化学
钴
材料科学
无机化学
物理化学
有机化学
电化学
电极
烷基
作者
Jing Lü,Jiang Liu,Long‐Zhang Dong,Shunli Li,Yuhe Kan,Ya‐Qian Lan
标识
DOI:10.1002/chem.201903482
摘要
Abstract The energy crisis and environmental pollution have forced scientists to explore alternative energy conversion and storage devices. The anodic reactions of these devices are all oxygen evolution reactions (OER), so the development of efficient OER electrocatalysts is of great significance. At the same time, understanding the reaction mechanism of OER is conducive to the rational design of efficient OER electrocatalysts. In general, catalytic active centers play a direct role in OER performance. In this paper, a series of stable bimetallic metal–organic frameworks (MOFs, named as Fe 3 ‐Co n ‐X 2 , n =2, 3 and X=F, Cl, Br) with similar structure were synthesized by changing the halogen coordinated with the cobalt metal active center, aiming to investigate the influence of halogen substitution effect on OER performance. It was found that the OER activity of Fe 3 ‐Co 3 ‐F 2 is much better than Fe 3 ‐Co 2 ‐Cl 2 and Fe 3 ‐Co 2 ‐Br 2 , indicating that the regulation of the electronegativity change of the coordination halogen atom can regulate the coordination electron structure of the metal active center, thereby achieving effective regulation of OER performance.
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