镍
氢氧化物
螯合作用
配体(生物化学)
材料科学
醛
无机化学
高分子化学
冶金
催化作用
有机化学
化学
受体
生物化学
作者
Yifan Huang,Fantao Kong,Yu Xu,Tao Yang,Ping Wu,Ruxiang Shen,Shangjun Zhuo,Xiangzhi Cui,Jianlin Shi
标识
DOI:10.1002/adma.202419887
摘要
Nickel-iron layered double hydroxides (NiFe LDHs) are considered as promising substitutes for precious metals in oxygen evolution reaction (OER). However, most of the reported NiFe LDHs suffer from poor long-term stability because of the Fe loss during OER resulting in severe inactivation. Herein, a dynamically stable chelating interface through in situ transformation of asymmetric aldehyde-ligand (THB, 1,3,5-Tris(3'-hydroxy-4'-formylphenyl)-benzene) modified NiFe LDHs to anchor Fe and significantly enhance the OER stability is reported. The fabricated asymmetric aldehyde-containing ligand THB is capable of stimulating much more interfacial charge transfer from NiFe LDHs to the oxygen group of THB and accelerating the formation of highly valent active Fe species leading to the strong combination between Fe and ligand and the reduced activation energy barrier of the intermediate, respectively. The optimized aldehyde-ligand-chelated NiFe LDHs (NiFe LDH/THB) shows enhanced OER performance featuring an overpotential of 224 mV at 100 mA cm
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