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Nature chemistry v.10 no.6, 2018년, pp.638 - 643   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

High phase-purity 1T′-MoS2- and 1T′-MoSe2-layered crystals

Yu, Yifu    (Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore   ); Nam, Gwang-Hyeon    (Department of Chemistry, School of Science, Tianjin University, Tianjin, China   ); He, Qiyuan    (Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, China   ); Wu, Xue-Jun    (Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore   ); Zhang, Kang    (HealthTech NTU, Interdisciplinary Graduate School, Nanyang Technological University, Singapore, Singapore   ); Yang, Zhenzhong    (Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore   ); Chen, Junze    (Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore   ); Ma, Qinglang    (School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore   ); Zhao, Meiting    (Beijing National Laboratory for Condensed Matter Physics, Institute of  ); Liu, Zhengqing   Ran, Fei-Rong   Wang, Xingzhi   Li, Hai   Huang, Xiao   Li, Bing   Xiong, Qihua   Zhang, Qing   Liu, Zheng   Gu, Lin   Du, Yonghua   Huang, Wei   Zhang, Hua  
  • 초록  

    Phase control plays an important role in the precise synthesis of inorganic materials, as the phase structure has a profound influence on properties such as conductivity and chemical stability. Phase-controlled preparation has been challenging for the metallic-phase group-VI transition metal dichalcogenides (the transition metals are Mo and W, and the chalcogens are S, Se and Te), which show better performance in electrocatalysis than their semiconducting counterparts. Here, we report the large-scale preparation of micrometre-sized metallic-phase 1T′-MoX 2 (X = S, Se)-layered bulk crystals in high purity. We reveal that 1T′-MoS 2 crystals feature a distorted octahedral coordination structure and are convertible to 2H-MoS 2 following thermal annealing or laser irradiation. Electrochemical measurements show that the basal plane of 1T′-MoS 2 is much more active than that of 2H-MoS 2 for the electrocatalytic hydrogen evolution reaction in an acidic medium.


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