塔菲尔方程
过渡金属
材料科学
析氧
催化作用
三元运算
电化学
钼
镍
无机化学
兴奋剂
化学工程
分解水
电极
化学
物理化学
冶金
光电子学
工程类
光催化
生物化学
程序设计语言
计算机科学
作者
Chao Wang,Jingyi Zhang,Luyao Wang,Jianmin Feng,Liqun Wang,Dong Li,Conglai Long,Dejun Li,Feng Hou,Liang Ji
标识
DOI:10.1016/j.susmat.2023.e00645
摘要
The crucial step for splitting water is the oxygen evolution reaction. The key to promote this reaction lies in the catalyst. Molybdenum disulfide, as a two-dimensional material with molybdenum and sulfur atoms stacked, is especially suitable as a doping platform to develop high-performance OER catalysts. Fe/Co/Ni ternary transition metal combination has always been a highly active catalytic site for OER. Heteroelement of Fe/Co/Ni doping is expected to effectively modify the local electronic configuration of matrix materials and thus enhances their electrocatalytic OER capability. With this in mind, we report a simple in-situ hydrothermal doping of MoSx nanowires on iron‑nickel alloy foam with ternary transition metal of Fe/Co/Ni. This ternary transition metal of Fe/Co/Ni doped f self-supported electrode (denoted Fe/Co/Ni-MoSx/INF) displays outstanding OER performance in terms of small overpotentials of 214 and 263 mV at current densities of 10 and 100 mA/cm2, respectively, in alkaline solution. It was far better than the commercial Ir/C catalysts (253 and 434 mV@10 and 100 mA/cm2). The Tafel slope is about 48.1 mV/dec. Moreover, Fe/Co/Ni-MoSx/INF also has an excellent catalytic stability without any obvious performance decay after 20 h operation. This work contributes to the investigation of high-efficiency OER catalysts based on transition metal-doped MoSx and offers a substitute for noble metal catalysts.
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