纳米片
析氧
材料科学
连接器
金属
金属有机骨架
氢氧化物
异质结
化学工程
纳米技术
分解水
氧气
催化作用
光催化
电化学
冶金
光电子学
电极
物理化学
化学
有机化学
工程类
吸附
操作系统
计算机科学
作者
Chunyan Ni,Zheng Han,Weiwei Liu,Liang Wu,Rui Li,Kun Zhou,Wang Zhang
标识
DOI:10.1002/adfm.202301075
摘要
Abstract Designing efficient electrocatalysts based on metal–organic framework (MOF) nanosheet arrays (MOFNAs) with controlled active heterointerface for the oxygen evolution reaction (OER) is greatly desired yet challenging. Herein, a facile strategy for the synthesis of MOF‐based nanosheet arrays (γ‐FeOOH/Ni‐MOFNA) is developed with abundant heterointerfaces between Ni‐MOF and γ‐FeOOH nanosheets by introducing linker defects to the former. The experimental and theoretical results show the key role of linker defects in inducing the growth of secondary γ‐FeOOH nanosheets onto the surface of Ni‐MOFNAs, which further leads to the formation of interfacial Ni/Fe dual sites with high oxygen evolution activity. Notably, the resulting γ‐FeOOH/Ni‐MOFNA exhibits excellent OER performance with low overpotentials of 193 and 222 mV at 10 and 100 mA cm −2 , respectively. Furthermore, the study of the structure–performance relationship of MOF‐based heterostructures reveals that Ni sites at the interface of the γ‐FeOOH/Ni‐MOFNA have higher activity than those at the interface of NiFe layered double hydroxide and Ni‐MOFNA. This study provides a new prospect on heterostructured electrocatalysts with highly active sites for enhanced OER.
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