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Vol. 10 No. 4 (2018)

MoS2 Nanosheet Arrays Rooted on Hollow rGO Spheres as Bifunctional Hydrogen Evolution Catalyst and Supercapacitor Electrode

https://doi.org/10.1007/s40820-018-0215-3
Shizheng Zheng
Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Department of Electronics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, People’s Republic of China
Lijun Zheng
Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Department of Electronics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, People’s Republic of China
Zhengyou Zhu
Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Department of Electronics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, People’s Republic of China
Jian Chen
Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Department of Electronics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, People’s Republic of China
Jianli Kang
School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, People’s Republic of China
Zhulin Huang
Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
Dachi Yang
Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Department of Electronics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, People’s Republic of China

Corresponding Author: Dachi Yang

yangdachi@nankai.edu.cn

Nano-Micro Letters, Vol. 10 No. 4 (2018), Article Number: 62

Abstract

MoS2 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 MoS2 nanosheet arrays (h-rGO@MoS2) are constructed via a dual-template approach and employed as bifunctional HER catalyst and supercapacitor electrode material. Because of the expanded interlayer spacing in MoS2 nanosheets and more exposed electroactive S–Mo–S edges, the constructed h-rGO@MoS2 architectures exhibit enhanced HER performance. Furthermore, benefiting from the synergistic effect of the improved conductivity and boosted specific surface areas (144.9 m2 g−1, ca. 4.6-times that of pristine MoS2), the h-rGO@MoS2 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.


Highlights:


1 MoS2 nanosheets arrays were vertically rooted on hollow rGO spheres (h-rGO@MoS2) via an optimized dual-template strategy.
2 The bifunctional h-rGO@MoS2 architecture exhibit enhanced hydrogen evolution reaction performance (105 mV, onset potential) and higher specific capacitance (238 F g−1 at 0.5 A g−1) as a supercapacitor electrode than pristine MoS2.

Keywords

MoS2 Reduced graphene oxide (rGO) Hollow spheres Hydrogen evolution reaction (HER) Supercapacitor
Zheng, Shizheng, Lijun Zheng, Zhengyou Zhu, Jian Chen, Jianli Kang, Zhulin Huang, and Dachi Yang. 2018. “MoS2 Nanosheet Arrays Rooted on Hollow RGO Spheres As Bifunctional Hydrogen Evolution Catalyst and Supercapacitor Electrode”. Nano-Micro Letters 10 (4):62. https://doi.org/10.1007/s40820-018-0215-3.
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