析氧
过电位
电催化剂
催化作用
分解水
密度泛函理论
材料科学
化学
化学工程
无机化学
物理化学
计算化学
电化学
电极
生物化学
光催化
工程类
作者
Hao Chen,Yongbing Ma,Yun Han,Xin Mao,Yongbin Hu,Xin Zhao,Qi Dong,Bo Wen,Aijun Du,Xin Wang,Xiao Lyu,Yi Jia
出处
期刊:Small
[Wiley]
日期:2024-01-23
被引量:1
标识
DOI:10.1002/smll.202309689
摘要
Abstract Developing efficient water‐splitting electrocatalysts to accelerate the slow oxygen evolution reaction (OER) kinetics is urgently desired for hydrogen production. Herein, ultralow phosphorus (P)‐doped NiFe LDH (NiFeP x LDH) with mild compressive strain is synthesized as an efficient OER electrocatalyst. Remarkably, NiFeP x LDH with the phosphorus mass ratio of 0.32 wt.% and compressive strain ratio of 2.53% (denoted as NiFeP 0.32 LDH) exhibits extraordinary OER activity with an overpotential as low as 210 mV, which is superior to that of commercial IrO 2 and other reported P‐based OER electrocatalysts. Both experimental performance and density function theory (DFT) calculation demonstrate that the doping of P atoms can generate covalent Fe─P coordination bonds and lattice distortion, thus resulting in the consequent depletion of electrons around the Fe active center and the downward shift of the d ‐band center, which can lead to a weaker adsorption ability of * O intermediate to improve the catalytic performance of NiFeP 0.32 LDH for OER. This work provides novel insights into the distinctive coordinated configuration of P in NiFeP x LDH, which can result in superior catalytic performance for OER.
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