Exfoliation of bulk 2H-MoS_(2)into bilayer 1T-phase nanosheets via ether-induced superlattices  

作　　者：Xiuling Shi Dongmei Lin Zhuorui Xiao Yibo Weng Hanxiang Zhou Xiaoying Long Zhiyu Ding Fuyuan Liang Yan Huang Guohua Chen Kaikai Li Tong-Yi Zhang 

机构地区：[1]School of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen 518055,China [2]Department of Mechanical Engineering,Research Institute for Smart Energy,The Hong Kong Polytechnic University,Hong Kong,China [3]School of Energy and Environment,City University of Hong Kong,Tat Chee Avenue,Kowloon,Hong Kong,China [4]The Hong Kong University of Science and Technology(Guangzhou),Guangzhou Municipal Key Laboratory of Materials Informatics,Advanced Materials Thrust and Sustainable Energy and Environment Thrust,Nansha,Guangzhou 511400,China

出　　处：《Nano Research》2024年第6期5705-5711,共7页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.12374003);the Guangdong Basic and Applied Basic Research Foundation(No.2022A1515012349);the Shenzhen Science and Technology Program(Nos.RCBS20200714114920129 and JCYJ20220531095208019);the Guangzhou Municipal Science and Technology Project(No.2023A03J0003).

摘　　要：The exfoliation of bulk 2H-molybdenum disulfide(2H-MoS_(2))into few-layer nanosheets with 1T-phase and controlled layers represents a daunting challenge towards the device applications of MoS_(2).Conventional ion intercalation assisted exfoliation needs the use of hazardous n-butyllithium and/or elaborate control of the intercalation potential to avoid the decomposition of the MoS_(2).This work reports a facile strategy by intercalating Li ions electrochemically with ether-based electrolyte into the van der Waals(vdW)channels of MoS_(2),which successfully avoids the decomposition of MoS_(2)at low potentials.The co-intercalation of Li+and the ether solvent into MoS_(2)makes a first-order phase transformation,forming a superlattice phase,which preserves the layered structure and hence enables the exfoliation of bulk 2H-MoS_(2)into bilayer nanosheets with 1T-phase.Compared with the pristine 2H-MoS_(2),the bilayer 1T-MoS_(2)nanosheets exhibit better electrocatalytic performance for the hydrogen evolution reaction(HER).This facile method should be easily extended to the exfoliation of various transition metal dichalcogenides(TMDs).

关 键 词：exfoliation of MoS_(2) phase transformations SUPERLATTICES ether electrolyte hydrogen evolution reaction(HER) 

分 类 号：TB383[一般工业技术—材料科学与工程]