文献类型：期刊文献

英文题名：Electrodeposited Multimetal Alloyed NiMoCo on Ni Mesh for Efficient Alkaline Hydrogen Evolution Reaction

作者：Mao, Fangxin[1];Wang, Zeng Guo[1];Cheng, Limin[2];Li, Xiaoxia[2];Sun, Kai Zhi[1];Liu, Peng Fei[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]China Gen Nucl New Energy Holdings Co Ltd, Beijing 100071, Peoples R China

年份：2023

卷号：37

期号：23

起止页码：18137

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20234014832042);WOS:【SCI-EXPANDED(收录号:WOS:001065423700001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22239001 and 52103340) and the China Postdoctoral Science Foundation Funded Project (2020M681201).

语种：英文

外文关键词：Cathodes - Current density - Electrocatalysts - Mesh generation - Nickel - Potassium hydroxide - Surface morphology - Ternary alloys

摘要：Developing efficient electrocatalysts for industrial alkaline hydrogen evolution reaction (HER) is important for alleviating energy problems and achieving decarbonization. Here, a multimetal alloyed NiMoCo coating was in situ electrodeposited on Ni mesh as an HER electrocatalyst. The obtained cathode exhibits ultrahigh HER activity in alkaline environments, requiring only low overpotentials of 13.7 and 146.0 mV in 1 M KOH to achieve current densities of 10 and 200 mA cm(-2), along with a robust stability of over 120 h at an operating current density of 400 mA cm(-2). The introduction of Co elements into NiMo-based alloys could significantly change the surface morphology from a planar to a threedimensional structure for exposing abundant active sites; moreover, strong electronic interaction between multimetal alloyed sites is beneficial to modulate alkaline HER activity. The full alkaline water splitting electrolyzer, which consisted of electrodeposited multimetal alloyed NiMoCo as the cathode and NiMoFe as the anode, was constructed, showing a cell voltage as low as 1.437 V to obtain the current density of 10 mA cm(-2) and 1.703 V for 200 mA cm(-2). This work would pave a new avenue to design and fabricate multimetal alloyed electrocatalysts directly grown on an industrial porous conductive substrate.