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

作     者：Weiwei Zhao Beibei Jin Longlu Wang Chengbo Ding Mengyue Jiang Tiantian Chen Shuaihang Bi Shujuan Liu Qiang Zhao Weiwei Zhao;Beibei Jin;Longlu Wang;Chengbo Ding;Mengyue Jiang;Tiantian Chen;Shuaihang Bi;Shujuan Liu;Qiang Zhao

作者机构：Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for BiosensorsInstitute of Advanced Materials(IAM)Nanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China College of Electronic and Optical Engineering&College of MicroelectronicsInstitute of Flexible Electronics(Future Technology)Nanjing University of Posts&Telecommunications(NUPT)Nanjing 210023 China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2022年第33卷第1期

页      面：557-561页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

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)。 

主　　题：MXene Ti_(3)C_(2)nanowires Ultrathin films Chemical transformation Hydrogen evolution reaction 

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.