Affiliation:
1. College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan University Changsha 410082 P. R. China
2. Institute of Environmental Research at Greater Bay Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of Education Guangzhou University Guangzhou 510006 P. R. China
Abstract
AbstractTransition metal layered double hydroxides, especially nickel‐iron layered double hydroxide (NiFe‐LDH) shows significant advancement as efficient oxygen evolution reaction (OER) electrocatalyst but also plays a momentous role as a precursor for NiFe‐based hydrogen evolution reaction (HER) catalysts. Herein, a simple strategy for developing Ni‐Fe‐derivative electrocatalysts via phase evolution of NiFe‐LDH under controllable annealing temperatures in an argon atmosphere is reported. The optimized catalyst annealed at 340 oC (denoted NiO/FeNi3) exhibits superior HER properties with an ultralow overpotential of 16 mV@10 mA cm−2. Density functional theory simulation and in situ Raman analyses reveal that the excellent HER properties of the NiO/FeNi3 can be attributed to the strong electronic interaction at the interface of the metallic FeNi3 and semiconducting NiO, which optimizes the H2O and H adsorption energies for efficient HER and OER catalytic processes. This work will provide rational insights into the subsequent development of related HER electrocatalysts and other corresponding compounds via LDH‐based precursors.
Subject
General Materials Science,General Chemistry
Cited by
42 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献