塔菲尔方程
过电位
材料科学
电催化剂
合金
催化作用
化学工程
电解
电解水
多孔性
电子转移
冶金
纳米技术
电化学
复合材料
电极
物理化学
化学
工程类
生物化学
电解质
作者
Haowei Bian,Rui Wang,Kuizhao Zhang,H. Zheng,Mengjin Wen,Zhengmin Li,Zihan Li,Guixue Wang,Guangwen Xie,Xin Liu,Luhua Jiang
标识
DOI:10.1016/j.surfcoat.2023.129407
摘要
Establishing efficient nano-porous electrocatalysts for facilitating electron transfer is a one of the useful ways for enhance water splitting. Herein, Ni-Fe-Cu-Co-W high entropy alloy (NFCCW-HEA) electrocatalysts on the iron sheet substrate have been successfully prepared by a simple and efficient one-step electrodeposition method. High entropy alloys have a variety of active sites and unique atomic scale synergies, which makes the catalyst have good catalytic performance and stability. Meanwhile, the HEA coating like cauliflower by electrodeposition can provide more attachment sites, and significantly upgrade the OER catalytic activity. NFCCW-HEA catalysts exhibit an excellent overpotential of 247.3 mV under the current density of 10 mA·cm−2, and a low Tafel slope of 62.9 mV dec−1. The electrocatalyst shows long term stability of electrolysis for over 24 h in 1 mol·L−1 KOH alkaline solution, which shows good stability. We expect to provide a new idea for the preparation of nano porous high entropy alloy electrocatalysts by one-step electrodeposition technology.
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