Effective regulation mechanisms of Fe-Ni(oxy)hydroxide:Ni-rich heteroatomic bonding(Ni–O–Fe–O–Ni)is essential

作     者：Ruo-Yao Fan Hui-Ying Zhao Zi-Yi Zhao Wen-Hui Hu Xin Liu Jian-Feng Yu Han Hu Yong-Ming Chai Bin Dong Ruo-Yao Fan;Hui-Ying Zhao;Zi-Yi Zhao;Wen-Hui Hu;Xin Liu;Jian-Feng Yu;Han Hu;Yong-Ming Chai;Bin Dong

作者机构：State Key Laboratory of Heavy Oil ProcessingCollege of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China Stanford PULSE InstituteSLAC National Accelerator LaboratoryMenlo ParkCA 95025USA 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第10期

页      面：12026-12034页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(No.52174283) the Shandong Provincial Natural Science Foundation(No.ZR2020MB044) Postgraduate Innovation Engineering Project of China University of Petroleum(East China)(No.YCX2021147) 

主　　题：Fe-Ni(oxy)hydroxide oxygen evolution reaction(OER) heteroatomic bonding Ni-rich structure regulation mechanisms 

摘      要：Although Fe-Ni combination performs well in transition metal-based oxygen evolution reaction(OER)electrocatalysts,there are lack of clear and general regulations mechanism to fully play the synergistic catalytic ***,we made the utmost of the interaction of Fe–Ni heteroatomic pair to obtain a highly active Fe-Ni(oxy)hydroxide catalytic layer on iron foam(IF)and nickel foam(NF)by in-situ electrochemical deposition and rapid surface reconstruction,which only required 327 and 351 mV overpotential to provide a large current of 1,000 mA·cm^(−2),*** results confirm that the moderate Ni-rich heteroatomic bonding(Ni–O–Fe–O–Ni)formed by adjusting the Ni/Fe ratio on the catalyst surface is important to offer predominant OER *** is a key component that enhances OER activity of Ni(O)OH,but Fe-rich structural surface formed by Fe–O–Ni–O–Fe bonding is not ***,the remarkable oxygen evolution performance of the prepared Ni2Fe(O)OH/IF and FeNi2(O)OH/NF can be chalked up to the optimized electronic structure of Fe–Ni heteroatomic bonding,the efficient gas spillover,the fast electron transport,and nanosheet clusters *** summary,our work suggests a comprehensive regulation mechanism for the construction of efficient Fe-Ni(oxy)hydroxide catalytic layer on inexpensive,stable,and self-supporting metallic material surface.