材料科学
氢氧化物
异质结
氧气
拉链
纳米技术
化学工程
光电子学
有机化学
化学
算法
计算机科学
工程类
作者
Minghui Xing,Zelong Qiao,Shaoke Zhu,Gaohong Xu,Jimmy Yun,Dapeng Cao
标识
DOI:10.1002/adfm.202409559
摘要
Abstract The nickel‐iron based materials are widely studied as excellent oxygen evolution reaction (OER) electrocatalysts. However, its relatively poor OER stability limits its practical applications. Herein, a zipper‐like interlocked heterostructure of NiFe layered double hydroxide (LDH)‐WN is constructed. The NiFe LDH‐WN exhibits not only ultrahigh OER activity of 228 mV overpotential at a current density of 50 mA cm −2 , but also extremely long‐term stability over 4500 h at 50 mA cm −2 and over 550 h at an industrial current density ≈350 mA cm −2 , which is ascribed to its special zipper‐like interlocked structure. Moreover, in situ Raman confirms that the presence of WN can efficiently achieve NiFe LDH reconstruction to slower the metal dissolution during OER, and therefore boosts its stability. DFT calculations reveal that WN not only can increase the *O adsorption capability and conductivity of NiFe LDH layer, but also can anchor the metal atoms of NiFe LDH layer to improve the dissolution energy barrier. In short, this work presents a new method of constructing the interlocked heterostructure to improve the OER stability of Ni‐Fe‐based catalysts, which would accelerate its practical application.
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