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MoSe2 porous microspheres comprising monolayer flakes with high electrocatalytic activity

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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.

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Authors and Affiliations

  1. Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China

    Yejun Zhang, Lun Li, Hongchao Yang & Qiangbin Wang

  2. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China

    Qiufang Gong & Yanguang Li

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  1. Yejun Zhang
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  2. Qiufang Gong
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  3. Lun Li
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  4. Hongchao Yang
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  5. Yanguang Li
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  6. Qiangbin Wang
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Correspondence to Qiangbin Wang.

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Zhang, Y., Gong, Q., Li, L. et al. MoSe2 porous microspheres comprising monolayer flakes with high electrocatalytic activity. Nano Res. 8, 1108–1115 (2015). https://doi.org/10.1007/s12274-014-0590-0

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  • DOI: https://doi.org/10.1007/s12274-014-0590-0

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