文献类型：期刊文献

中文题名：Highly surface electron-deficient Co_(9)S_(8) nanoarrays for enhanced oxygen evolution

作者：Haoxuan Zhang[1,2];Jingyu Wang[1,2];Qilin Cheng[1,2];Petr Saha[1,2];Hao Jiang[1,2]

机构：[1]Key Laboratory for Ultrafine Materials of Ministry of Education,Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai,200237,China;[2]Centre of Polymer Systems,University Institute,Tomas Bata University in Zlin,Trida T.Bati 5678,Zlin,76001,Czech Republic

年份：2020

卷号：5

期号：4

起止页码：492

中文期刊名：Green Energy & Environment

外文期刊名：绿色能源与环境（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2019_2020】；

基金：supported by the National Natural Science Foundation of China(21838003,21808061 and 91534122);the Social Development Program of Shanghai(17DZ1200900);the Shanghai Scientific and Technological Innovation Project(18JC1410600);he Fundamental Research Funds for the Central Universities(222201718002).

语种：英文

中文关键词：Electron deficiency;Co_(9)S_(8);Nanoarray;Electrocatalyst;Oxygen evolution reaction

摘要：Tailoring valence electron delocalization of transition metal center is of importance to achieve highly-active electrocatalysts for oxygen evolution reaction(OER).Herein,we demonstrate a“poor sulfur”route to synthesize surface electron-deficient Co_(9)S_(8) nanoarrays,where the binding energy(BE)of Co metal center is considerably higher than all reported Co_(9)S_(8)-based electrocatalysts.The resulting Co_(9)S_(8) electrocatalysts only require the overpotentials(h)of 265 and 326 mV at 10 and 100 mA cm^(-2) with a low Tafel slope of 56 mV dec^-(1) and a 60 hlasting stability in alkaline media.The OER kinetics are greatly expedited with a low reaction activation energy of 27.9 kJ mol^-(1) as well as abundant OOH*key intermediates(24%),thus exhibiting excellent catalytic performances.The surface electron-deficient engineering gives an available strategy to improve the catalytic activity of other advanced non-noble electrocatalysts.