Bimetallic Oxyhydroxide as a High-Performance Water Oxidation Electrocatalyst under Industry-Relevant Conditions

• 作者: Jiaxin Yuan Xiaodi Cheng Chaojun Lei Bin Yang Zhongjian Li Kun Luo K.H.Koko Lam Lecheng Lei Yang Hou Kostya Ken Ostrikov
• 来源期刊: 工程（英文）
• 年，卷（期）: 2021,（9）
• 所属期刊栏目: Hydrogen Energy—Article
• 页码范围: 1306-1312
• 页数: 7页
• 语种: 英文

摘要

Developing high-performing oxygen evolution reaction(OER)electrocatalysts under high-current opera-tion conditions is critical for future commercial applications of alkaline water electrolysis for clean energy generation.Herein,we prepared a three-dimensional(3D)bimetallic oxyhydroxide hybrid grown on a Ni foam(NiFeOOH/NF)prepared by immersing Ni foam(NF)into Fe(NO3)3 solution.In this unique 3D structure,the NiFeOOH/NF hybrid was composed of crystalline Ni(OH)2 and amorphous FeOOH evenly grown on the NF surface.As a bimetallic oxyhydroxide electrocatalyst,the NiFeOOH/NF hybrid exhibited excellent catalytic activity,surpassing not only the other reported Ni-Fe based electrocatalysts,but also the commercial Ir/C catalyst.In situ electrochemical Raman spectroscopy demonstrated the active FeOOH and NiOOH phases involved in the OER process.Profiting from the synergy of Fe and Ni catalytic sites,the NiFeOOH/NF hybrid delivered an outstanding OER performance under challenging industrial conditions in a 10.0mol·L-1 KOH electrolyte at 80℃,requiring potentials as small as 1.47 and 1.51V to achieve the super-high catalytic current densities of 100 and 500mA·cm-2,respectively.