【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-dimensi
【机 构】
：
Key Laboratory of Biomass Chemical Engineering of the Ministry of Education,College of Chemical and
论文部分内容阅读
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.
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