4.7 Article

Molybdenum and cobalt co-doped VC nanoparticles encapsulated in nanocarbon as efficient electrocatalysts for the hydrogen evolution reaction

Journal

INORGANIC CHEMISTRY FRONTIERS
Volume 9, Issue 5, Pages 870-878

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qi01313k

Keywords

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Funding

  1. National Natural Science Foundation of China [22179074, 52073166]
  2. Xi'an Key Laboratory of Green Manufacture of Ceramic Materials Foundation [2019220214SYS017CG039]
  3. Key Program for International S&T Cooperation Projects of Shaanxi Province [2020KW-038, 2020GHJD-04]
  4. Science and Technology Program of Xian, China [2020KJRC0009]
  5. Scientific Research Program - Shaanxi Provincial Education Department [20JY001]
  6. Science and Technology Resource Sharing Platform of Shaanxi Province [2020PT-022]
  7. Science and Technology Plan of Weiyang District, Xi`an [202009]
  8. Fund of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry [2021-14]
  9. Open Project of Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education [KFKT2020-06]

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This study successfully synthesized molybdenum and cobalt co-doped VC nanoparticles encapsulated in nanocarbon as a catalyst for the electrocatalytic hydrogen evolution reaction. The catalyst exhibited low overpotential and Tafel slope, as well as outstanding long-term durability. The excellent performance can be attributed to the optimized electronic structure, improved conductivity, and abundant catalytic active sites.
The development of highly active, stable and low-cost non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) is still the key issue in the field of hydrogen energy. Herein, molybdenum and cobalt co-doped VC nanoparticles encapsulated in nanocarbon (Mo, Co-VC@C) are successfully synthesized via a one-pot calcination route for the electrocatalytic hydrogen evolution reaction (HER). The Mo, Co-VC@C catalyst exhibits a low overpotential of 137 mV at a current density of 10 mV cm(-2) with a quite small Tafel slope of 93.1 mV dec(-1), as well as outstanding long-term durability for at least 110 h in 1 M KOH solution. Such excellent electrocatalytic HER performance is ascribed to the synergistic contribution of the optimized electronic structure, the improved electronic conductivity and the exposed abundant catalytic active sites of the ultrafine VC nanostructure.

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