文献类型：期刊文献

英文题名：Cobalt Covalent Doping in MoS2 to Induce Bifunctionality of Overall Water Splitting

作者：Xiong, Qizhong[1,2];Wang, Yun[3];Liu, Peng-Fei[4];Zheng, Li-Rong[5];Wang, Guozhong[1];Yang, Hua-Gui[4];Wong, Po-Keung[6];Zhang, Haimin[1];Zhao, Huijun[1,3]

机构：[1]Chinese Acad Sci, Key Lab Mat Phys, Anhui Key Lab Nanomat & Nanotechnol, Inst Solid State Phys,Ctr Environm & Energy Nanom, Hefei 230031, Peoples R China;[2]Univ Sci & Technol China, Hefei 230026, Peoples R China;[3]Griffith Univ, Ctr Clean Environm & Energy, Gold Coast Campus, Gold Coast, NSW 4222, Australia;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[5]Chinese Acad Sci, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, 19B Yuquan Rd, Beijing 100049, Peoples R China;[6]Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China

年份：2018

卷号：30

期号：29

外文期刊名：ADVANCED MATERIALS

收录：;EI(收录号：20182305270464);WOS:【SCI-EXPANDED(收录号:WOS:000438709400027)】；

基金：This work was financially supported by the (Grant Nos. 51432009 and 51672277), the CAS Pioneer Hundred Talents Program, and the CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China.

语种：英文

外文关键词：bifunctional electrocatalysts; cobalt covalent doping; MoS2; overall water splitting; vapor-phase hydrothermal method

摘要：The layer-structured MoS2 is a typical hydrogen evolution reaction (HER) electrocatalyst but it possesses poor activity for the oxygen evolution reaction (OER). In this work, a cobalt covalent doping approach capable of inducing HER and OER bifunctionality into MoS2 for efficient overall water splitting is reported. The results demonstrate that covalently doping cobalt into MoS2 can lead to dramatically enhanced HER activity while simultaneously inducing remarkable OER activity. The catalyst with optimal cobalt doping density can readily achieve HER and OER onset potentials of -0.02 and 1.45 V (vs reversible hydrogen electrode (RHE)) in 1.0 m KOH. Importantly, it can deliver high current densities of 10, 100, and 200 mA cm(-2) at low HER and OER overpotentials of 48, 132, 165 mV and 260, 350, 390 mV, respectively. The reported catalyst activation approach can be adapted for bifunctionalization of other transition metal dichalcogenides.