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Ultrathin Ti_(3)C_(2) nanowires derived from multi-layered bulks for high-performance hydrogen evolution reaction

查看全文 作　　者：Weiwei [1]Zhao;Beibei [1]Jin;Longlu [2]Wang;Chengbo [1]Ding;Mengyue [1]Jiang;Tiantian [1]Chen;Shuaihang [1]Bi;Shujuan [1]Liu;Qiang [1,2]Zhao 高影响力作者 机构地区：[1]Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors,Institute of Advanced Materials(IAM)Nanjing University of Posts&Telecommunications(NUPT),Nanjing 210023,China;[2]College of Electronic and Optical Engineering&College of Microelectronics,Institute of Flexible Electronics(Future Technology)Nanjing University of Posts&Telecommunications(NUPT),Nanjing 210023 China高影响力机构 出　　处：《Chinese Chemical Letters》索引2022年第33卷第1期,共5页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Nos.61804082,21671108 and 51473078);Synergetic Innovation Center for Organic Electronics and Information Displays and Projects of International Cooperation and Exchanges NSFC(Nos.51811530018);National Natural Science Foundation of China(No.61935017);the China Postdoctoral Science Foundation Funded Project(No.2018M642286);National Program for Support of Top-Notch Young Professionals,Scientific and Technological Innovation Teams of Colleges and Universities in Jiangsu Province(No.TJ215006);Priority Academic Program Development of Jiangsu Higher Education Institutions(No.YX03003);Jiangsu Planned Projects for Postdoctoral Research Funds(No.2019K047A)。 摘　　要：One-dimensional ultrathin nanowires(NWs)offer a great deal of promising properties for electrochemical energy storage and conversion due to their nanoscale confinement effect and high surface-to-volume ratios.It is highly desirable to precisely design and synthesize ultrathin Ti_(3)C_(2)NWs in the aspect of size,crystalline structure and composition.Here,we report a simple alkalization strategy to design the ultrathin Ti_(3)C_(2)NWs for hydrogen evolution reaction(HER)by modulating the surface-active sites.The design principle can well improve the amount of the defect sites and ion accessibility to increase the interactions between Ti_(3)C_(2)NWs and H^(*).The optimized Ti_(3)C_(2)NWs achieve an overpotential of 476 mV at the current density of 10 mA/cm^(2)and a Tafel slope of 129 mV/dec for HER catalysis,which are superior to that of Ti_(3)C_(2)nanosheets and m-Ti_(3)C_(2).It paves an avenue for the rational transformation of MXene bulks to one-dimensional NWs catalysts for HER. 关 键 词：MXene Ti_(3)C_(2)nanowires Ultrathin films Chemical transformation Hydrogen evolution reaction
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