Confined synthesis of MoS_(2) with rich co-doped edges for enhanced hydrogen evolution performance  

作　　者：Zongge Li Chenlei Li Jianwen Chen Xu Xing Yaqun Wang Ying Zhang Miaosen Yang Guoxin Zhang 

机构地区：[1]Al-ion Battery Research Center,Department of Energy Storage Technology,Shandong University of Science and Technology,Qingdao 266590,Shandong,China [2]State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,Shandong,China [3]School of Chemical Engineering,Northeast Electric Power University,Jilin 132012,Jilin,China

出　　处：《Journal of Energy Chemistry》2022年第7期18-26,I0002,共10页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(22071137)。

摘　　要：Activating MoS_(2) with atomic metal doping is promising to harvest desirable Pt-matched hydrogen evolution reaction(HER)catalytic performance.Herein,we developed an efficient method to access edgerich lattice-distorted MoS_(2) for highly efficient HER via in-situ sulphuration of atomic Co/Mo species that were well-dispersed in a formamide-derived N-doped carbonaceous(f-NC)substrate.Apart from others,pre-embedding Co/Mo species in f-NC controls the release of metal sources upon annealing in S vapor,grafting the as-made MoS_(2) with merits of short-range crystallinity,distorted lattices,rich defects,and more edges exposed.The content of atomic Co species embedded in MoS_(2) reaches up to 2.85 at.%,and its atomic dispersion has been systematically confirmed by using XRD,HRTEM,XPS,and XAS characterizations.The Co-doped MoS_(2) sample exhibits excellent HER activity,achieving overpotentials of 67 and155 m V at j=10 m A cm^(-2) in 1.0 M KOH and 0.5 M H_(2)SO_(4),respectively.Density functional theory simulations suggest that,compared with free-doping MoS_(2),the edged Co doping is responsible for the significantly improved HER activity.Our method,in addition to providing reliable Pt-matched HER catalysts,may also inspire the general synthesis of edge-rich metal-doped metal chalcogenide for a wide range of energy conversion applications.

关 键 词：Molybdenum sulfide Metal doping FORMAMIDE Carbon material Hydrogen evolution reaction 

分 类 号：TQ116.2[化学工程—无机化工] TQ426