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Nano Research 2017, 10(7): 2210-2222 https://doi.org/10.1007/s12274-016-1410-5
Research Article | Issue | Published: 27 March 2017

Size-controlled MoS2 nanodots supported on reduced graphene oxide for hydrogen evolution reaction and sodium-ion batteries

Show Author's Information Weiyi Sun,  Pan Li,  Xue Liu,  Jiajia Shi,  Hongming Sun,  Zhanliang Tao( ),  Fujun Li,  Jun Chen
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)Collaborative Innovation Center of Chemical Science and EngineeringCollege of ChemistryNankai UniversityTianjin300071China
Keywords:
MoS2, nanodots, electrochemical properties, monodisperse, size-controlled
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Sun W, Li P, Liu X, et al. Size-controlled MoS2 nanodots supported on reduced graphene oxide for hydrogen evolution reaction and sodium-ion batteries. Nano Research, 2017, 10(7): 2210-2222. https://doi.org/10.1007/s12274-016-1410-5
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Abstract Full text Electronic supplementary material About this article

Transition metal dichalcogenide nanodots (NDs) have received considerable interest. We report a facile bottom-up synthetic route for MoS2 NDs by using molybdenum pentachloride and L-cysteine as precursors in oleylamine. The synthesis of NDs with a narrow size distribution ranging from 2.2 to 5.3 nm, was tailored by controlling the reaction time. Because of its coating characteristics, oleyalmine leads to uniformity and monodispersity of the NDs. Moreover, the NDs synthesized have large specific surface areas providing active sites. Graphene possesses outstanding conductivity. Combining the advantages of the two materials, the 0D/2D material exhibits superior electrochemical performance because of the 2D permeable channels for ion adsorption, energy storage, and conversion. The as-prepared MoS2/rGO (~2.2 nm) showed a stable capacity of 220 mAh·g-1 after 10,000 cycles at the current density of 20 A·g-1. Furthermore, a reversible capacity ~140 mAh·g-1 was obtained at a much higher current density of 40 A·g-1. Additionally, this composite exhibited superior catalytic performance evidenced by a small overpotential (222 mV) to afford 10 mA·cm-2, and a small Tafel slope (59.8 mV·decade-1) with good acid-stability. The facile approach may pave the way for the preparation of NDs with these nanostructures for numerous applications.


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Electronic supplementary material
About this article

Size-controlled MoS2 nanodots supported on reduced graphene oxide for hydrogen evolution reaction and sodium-ion batteries

Show Author's information Weiyi Sun, Pan Li, Xue Liu, Jiajia Shi, Hongming Sun, Zhanliang Tao( ), Fujun Li, Jun Chen
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)Collaborative Innovation Center of Chemical Science and EngineeringCollege of ChemistryNankai UniversityTianjin300071China

Abstract

Transition metal dichalcogenide nanodots (NDs) have received considerable interest. We report a facile bottom-up synthetic route for MoS2 NDs by using molybdenum pentachloride and L-cysteine as precursors in oleylamine. The synthesis of NDs with a narrow size distribution ranging from 2.2 to 5.3 nm, was tailored by controlling the reaction time. Because of its coating characteristics, oleyalmine leads to uniformity and monodispersity of the NDs. Moreover, the NDs synthesized have large specific surface areas providing active sites. Graphene possesses outstanding conductivity. Combining the advantages of the two materials, the 0D/2D material exhibits superior electrochemical performance because of the 2D permeable channels for ion adsorption, energy storage, and conversion. The as-prepared MoS2/rGO (~2.2 nm) showed a stable capacity of 220 mAh·g-1 after 10,000 cycles at the current density of 20 A·g-1. Furthermore, a reversible capacity ~140 mAh·g-1 was obtained at a much higher current density of 40 A·g-1. Additionally, this composite exhibited superior catalytic performance evidenced by a small overpotential (222 mV) to afford 10 mA·cm-2, and a small Tafel slope (59.8 mV·decade-1) with good acid-stability. The facile approach may pave the way for the preparation of NDs with these nanostructures for numerous applications.

Keywords: MoS2, nanodots, electrochemical properties, monodisperse, size-controlled

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Publication history
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Acknowledgements

Publication history

Received: 29 September 2016
Revised: 05 December 2016
Accepted: 09 December 2016
Published: 27 March 2017
Issue date: July 2017

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

This work was supported by the National Key R&D Program (No. 2016YFB0901502), National Natural Science Foundation of China (Nos. 51231003, 51271094, and 21231005), Ministry of Education (Nos. B12015 and IRT13R30), and the Fundamental Research Funds for the Central Universities.

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