Promotion of the oxygen evolution performance of Ni–Fe layered hydroxides via the introduction of a proton-transfer mediator anion  

作　　者：Wenlong Li Fusheng Li Yilong Zhao Chang Liu Yingzheng Li Hao Yang Ke Fan Peili Zhang Yu Shan Licheng Sun 

机构地区：[1]State Key Laboratory of Fine Chemicals,Institute of Artificial Photosynthesis,DUT-KTH Joint Education and Research Centre on Molecular Devices,Dalian University of Technology,Dalian 116024,China [2]Department of Chemistry,School of Engineering Sciences in Chemistry,Biotechnology and Health,KTH Royal Institute of Technology,Stockholm 10044,Sweden [3]Center of Artificial Photosynthesis for Solar Fuels,School of Science,Westlake University,Hangzhou 310024,China

出　　处：《Science China Chemistry》2022年第2期382-390,共9页中国科学（化学英文版）

基　　金：financially supported by the National Natural Science Foundation of China(22172011 and 22088102);the K&A Wallenberg Foundation(KAW 2016.0072);Key Laboratory of Bio-based Chemicals of Liaoning Province of China。

摘　　要：Developing efficient catalysts with high durability and activity for the oxygen evolution reaction(OER)is imperative for sustainable energy conversion technologies,including hydrogen generation and CO_(2) reduction,as well as other electrochemical energy storage systems.To this end,a comprehensive understanding of the mechanism for the water oxidation reaction is vital.Herein,a surfactant,nonafluoro-1-butanesulfonate(FBS),was introduced into Ni-Fe layered double hydroxide(Ni Fe-FBS/CFP)via electrochemical deposition on the surface of a carbon fiber paper(CFP)substrate.The as-prepared Ni Fe-FBS/CFP electrode exhibited excellent catalytic activities for OER compared to the Ni-Fe layered double hydroxide based electrode(Ni Fe-LDH/CFP),an excellent stability of 15 h,and an ultralow Tafel slope of 25.8 m V dec-1.Furthermore,by combining the results of p H-dependent kinetics investigations,chemical probing,proton inventory studies,and isotopic and atom-protontransfer measurements,it was observed that a proton-transfer process controls the reaction rates of both the Ni Fe-LDH and Ni Fe-FBS catalysts,and the residual sulfonate groups serve as proton transfer mediator to accelerate the proton transfer rate.

关 键 词：water splitting Ni Fe–LDH proton-coupled electron transfer proton transfer mediator sulfonate group 

分 类 号：TQ426[化学工程]