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Research Article

MoSe2 porous microspheres comprising monolayer flakes with high electrocatalytic activity

Yejun Zhang1, Qiufang Gong2, Lun Li1, Hongchao Yang1, Yanguang Li2, Qiangbin Wang1( )
Key Laboratory of Nano-Bio InterfaceDivision of Nanobiomedicine and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of SciencesSuzhou215123China
Institute of Functional Nano & Soft Materials (FUNSOM)Soochow UniversitySuzhou215123China
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Abstract

A facile colloidal route to synthesize MoSe2 porous microspheres with diameters of 400–600 nm made up of MoSe2 monolayer flakes (~0.7 nm in thickness) is reported. The solvents trioctylamine (TOA) and oleylamine (OAM) are found to play important roles in the formation of MoSe2 microspheres, whereby TOA determines the three-dimensional (3D) microspherical morphology and OAM directs the formation of MoSe2 monolayer flakes. The robust 3D MoSe2 microspheres exhibit remarkable activity and durability for the electrocatalytic hydrogen evolution reaction (HER) in acid, maintaining a small onset overpotential of ~77 mV and keeping a small overpotential of 100 mV for a current density of 5 mA/cm2 after 1, 000 cycles. In addition, similar 3D WSe2 microspheres can also be prepared by using this method. We expect this facile colloidal route could further be expanded to synthesize other porous structures which will find applications in fields such as in energy storage, catalysis, and sensing.

Keywords

MoSe2transition-metal chalcogenidesporous microspheresmonolayer flakeselectrocatalytic activity

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Nano Research
Volume 8 Issue 4,
April 2015
Pages 1108-1115
DOI: 10.1007/s12274-014-0590-0
Cite this article:
Zhang Y, Gong Q, Li L, et al. MoSe2 porous microspheres comprising monolayer flakes with high electrocatalytic activity. Nano Research, 2015, 8(4): 1108-1115. https://doi.org/10.1007/s12274-014-0590-0

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Received: 26 August 2014
Revised: 10 September 2014
Accepted: 16 September 2014
Published: 27 October 2014
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014
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