MoS_2 Nanosheet Arrays Rooted on Hollow rGO Spheres as Bifunctional Hydrogen Evolution Catalyst and Supercapacitor Electrode

作     者：Shizheng Zheng Lijun Zheng Zhengyou Zhu Jian Chen Jianli Kang Zhulin Huang Dachi Yang 

作者机构：Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Department of Electronics College of Electronic Information and Optical Engineering Nankai University School of Material Science and Engineering Tianjin Polytechnic University Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Chinese Academy of Sciences 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2018年第10卷第4期

页      面：70-80页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 081705[工学-工业催化] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the Natural Science Foundation of China (Grant No.21473093) Fundamental Research Funds for the Central Universities and Tianjin Research Program of Application Foundation and Advanced Technology (Grant No.14JCYBJC41300) Ph.D. Candidate Research Innovation Fund of Nankai University 

主　　题：MoS2 Reduced graphene oxide(rGO) Hollow spheres Hydrogen evolution reaction(HER) Supercapacitor 

摘      要：MoS_2 has attracted attention as a promising hydrogen evolution reaction(HER) catalyst and a supercapacitor electrode material. However, its catalytic activity and capacitive performance are still hindered by its aggregation and poor intrinsic conductivity. Here, hollow rGO sphere-supported ultrathin MoS_2 nanosheet arrays(hrGO@MoS_2) are constructed via a dual-template approach and employed as bifunctional HER catalyst and supercapacitor electrode material. Because of the expanded interlayer spacing in MoS_2 nanosheets and more exposed electroactive S–Mo–S edges, the constructed h-rGO@MoS_2 architectures exhibit enhanced HER performance. Furthermore, benefiting from the synergistic effect of the improved conductivity and boosted specific surface areas(144.9 m^2 g^(-1), ca. 4.6-times that of pristine MoS_2), the h-rGO@MoS_2 architecture shows a high specific capacitance(238 F g^(-1) at a current density of 0.5 A g^(-1)), excellent rate capacitance, and remarkable cycle stability. Our synthesis method may be extended to construct other vertically aligned hollow architectures,which may serve both as efficient HER catalysts and supercapacitor electrodes.