材料科学
过电位
纳米颗粒
硫化物
析氧
电催化剂
三元运算
X射线光电子能谱
催化作用
化学工程
金属
纳米技术
无机化学
物理化学
化学
电化学
有机化学
电极
冶金
工程类
计算机科学
程序设计语言
作者
Mingjin Cui,Chunpeng Yang,Boyang Li,Qi Dong,Meiling Wu,Sooyeon Hwang,Hua Xie,Xizheng Wang,Guofeng Wang,Liangbing Hu
标识
DOI:10.1002/aenm.202002887
摘要
Abstract Transition metal sulfides with a multi‐elemental nature represent a class of promising catalysts for oxygen evolution reaction (OER) owing to their good catalytic activity. However, their synthesis remains a challenge due to the thermodynamic immiscibility of the constituent multimetallic elements in a sulfide structure. Herein, for the first time the synthesis of high‐entropy metal sulfide (HEMS, i.e., (CrMnFeCoNi)S x ) solid solution nanoparticles is reported. Computational and X‐ray photoelectron spectroscopy analysis suggest that the (CrMnFeCoNi)S x exhibits a synergistic effect among metal atoms that leads to desired electronic states to enhance OER activity. The (CrMnFeCoNi)S x nanoparticles show one of the best activities (low overpotential 295 mV at 100 mA cm −2 in 1 m KOH solution) and good durability (only slight polarization after 10 h by chronopotentiometry) compared with their unary, binary, ternary, and quaternary sulfide counterparts. This work opens up a new synthesis paradigm for high‐entropy compound nanoparticles for highly efficient electrocatalysis applications.
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