Non-covalent interaction of atomically dispersed dual-site catalysts featuring Co and Ni nascent pair sites for efficient electrocatalytic overall water splitting  

作　　者：Imran Khan Yaogang Chen Zhiyang Li Wenjie Liu Salman Khan Sami Ullah Linlin Liu Amir Zada Sharafat Ali Shabana Shaheen Lei Yang 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,Shenzhen Key Laboratory of Organic Pollution Prevention and Control,School of Civil and Environmental Engineering,Harbin Institute of Technology Shenzhen,Shenzhen 518055,China [2]School of Physics and Electronics,Central South University,Changsha 410083,China [3]CNAS Accredited Test Center,Guangdong Engineering Technology Research Center of Air Purification,Healthlead Co.,Ltd.,Shenzhen 518055,China [4]Key laboratory of Functional Inorganic Material Chemistry,Ministry of Education of the People's Republic of China,Heilongjiang University,Harbin 150080,China [5]K.A.CARE Energy Research&Innovation Center(ERIC),King Fahd University of Petroleum&Minerals(KFUPM),Dhahran 31261,Saudi Arabia [6]Department of Chemistry,Abdul Wali Khan University,Mardan,Khyber Pakhtunkhwa 23200,Pakistan [7]School of Physics,University of Electronic Science and Technology of China,Chengdu 610054,China

出　　处：《Journal of Materials Science & Technology》2024年第11期210-225,共16页材料科学技术（英文版）

基　　金：National Natural Science Foundation of China(Nos.52170157 and 52111530188);Natural Science Foundation of Shenzhen(No.JCYJ20220531095408020);Major Program of Jiangxi Provincial Department of Science and Technology(No.2022KSG01004);University-Industry Collaborative Education Program(No.220902016150653);Natural Science Foundation of Shenzhen(No.GXWD20201230155427003-20200802110025006);Start-up Grant Harbin Institute of Technology(Shenzhen)(Nos.IA45001007 and HA11409066).

摘　　要：The scarcity of highly effective and economical catalysts is a major impediment to the widespread adop-tion of electrochemical water splitting for the generation of hydrogen.MoS_(2),a low-cost candidate,suffers from inefficient catalytic activity.Nonetheless,a captivating strategy has emerged,which involves the en-gineering of heteroatom doping to enhance electrochemical proficiency.This investigation demonstrates a successful implementation of the strategy by combining ultrathin MoS_(2) nanosheets with Co and Ni dual single multi-atoms(DSMAs)grown directly on 2D N-doped carbon nanosheets(CoNi-MoS_(2)/NCNs)for the purpose of improving hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).With the aid of a dual-atom doped bifunctional electrocatalyst,effective water splitting has been achieved across a broad pH range in electrolytes.The double doping of Co and Ni strengthens their interactions,thereby altering the electromagnetic composition of the host MoS_(2) and ultimately leading to improved electrocat-alytic activity.Additionally,the synergistic effect between NCNs and MoS_(2) nanosheets provided efficient electron transport channels for ions and an ample surface area with open voids for ion diffusion.Con-sequently,the CoNi-MoS_(2)/NCNs catalysts demonstrated exceptional stability and activity,producing low degree overpotentials of 180.5,124.9,and 196.4 mV for HER and 200,203,and 207 mV for OER in neu-tral,alkaline,and acidic mediums,respectively,while also exhibiting outstanding overall water-splitting performance,durability,and stability when used as an electrolyzer at universal pH.

关 键 词：Multifunctional catalyst Water splitting Functionalized carbon nanosheets Interface engineering pH-universal electrocatalysis 

分 类 号：TQ116.2[化学工程—无机化工] TQ426