Edge-oriented MoS 2 supported on nickel/carbon core-shell nanospheres for enhanced hydrogen evolution reaction performance

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DOI

  • Yin Wang
  • ,
  • Zegao Wang, Sichuan University
  • ,
  • Qian Yang
  • An Hua, Institute of Metal Research Chinese Academy of Sciences
  • ,
  • Song Ma, Institute of Metal Research Chinese Academy of Sciences
  • ,
  • Zhidong Zhang, Institute of Metal Research Chinese Academy of Sciences
  • ,
  • Mingdong Dong

Molybdenum disulfide (MoS 2 ), as one of the important two-dimensional (2D) transition metal dichalcogenides (TMDs), has shown huge potential for catalytic applications. However, both poor conductivity and insufficient active edge sites are the main obstacles limiting MoS 2 as a highly efficient electrocatalyst. In this study, a great number of edge-oriented 2D-MoS 2 nanosheets were synthesized on the surface of nickel/carbon (Ni/C) core-shell spheres. The edge-oriented MoS 2 nanosheets not only increase the number of exposed active edges, but also promote the charge transfer between active edges and Ni/C spheres. The electrochemical results show that nickel/carbon/MoS 2 (Ni/C/MoS 2 ) nanospheres deliver the highest activity with a Tafel slope as small as 55.5 mV per decade and an overpotential as small as 275 mV at a current density of 10 mA cm −2 . Furthermore, this Ni/C/MoS 2 core-shell architecture shows good stability and durability by the proof of 2000 cycles of cyclic voltammetry followed by a 9000 s i-t curve test. The method provides an opportunity to further improve the electrochemical catalysis of MoS 2 to produce hydrogen for energy storage.

Original languageEnglish
JournalNew Journal of Chemistry
Volume43
Issue16
Pages (from-to)6146-6152
Number of pages7
ISSN1144-0546
DOIs
Publication statusPublished - 2019

    Research areas

  • ABSORPTION, CATALYSTS, COMPOSITES, DISULFIDE, ELECTROCATALYSTS, FACILE SYNTHESIS, GRAPHENE, NANOSHEETS, OXIDE

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