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Golf-like (V, Ru)-co-doped NiS2 Microspheres as Efficient Electrocatalysts for Hydrogen Evolution Reaction in Alkaline Media
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1.Kunming Sino-Platinum Metals Catalyst Co., Ltd, Kunming 650106, China;2.Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650106, China;3.Kunming Institute of Precious Metals, Kunming 650106, China

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Platinum Group Metal Environmental Treatment and Key Technology Research and Application Demonstration of New Chemical Catalytic Materials (202102AB080007)

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    Abstract:

    Vanadium and ruthenium were introduced into NiS2 via solvothermal method and ruthenium drop method (room temperature) to prepare (V, Ru)-co-doped NiS2 microspheres coated on Ni foam ((V, Ru)-NiS2/NF) as electrocatalysts. The rough golf-like structure allowed the exposure of abundant active sites via sulfuration process. Moreover, the cooperation of vanadium and ruthenium could optimize the electronic structure of NiS2, provide extra catalytically active sites, and further strengthen the intrinsic catalytic activity. Besides, the addition of nickel foam could support the catalytic material, avoid the aggregation, and enhance the conductivity. Results show that the obtained (V, Ru)-NiS2/NF electrocatalysts exhibit excellent electrocatalytic performance and superior stability for hydrogen evolution reaction (HER) in alkaline media. At the current density of 10 mA·cm-2, the presented (V, Ru)-NiS2/NF delivers an overpotential of 38 mV, which is smaller than that of commercial Pt/C, and possesses lower Tafel slope (80.3 mV·dec-1), higher relative electrochemical active surface area (ECSA) and excellent durability in 1 mol/L KOH for 24 h.

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[Wang Wensi, Liu Hui, Yu Zejin, Lu Jun, Feng Feng, Huan Yuanfeng, Zhao Yunkun, Yu Jianmin, Qing Shan, Bi Xiangguang. Golf-like (V, Ru)-co-doped NiS2 Microspheres as Efficient Electrocatalysts for Hydrogen Evolution Reaction in Alkaline Media[J]. Rare Metal Materials and Engineering,2023,52(2):461~469.]
DOI:10.12442/j. issn.1002-185X.20220388

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History
  • Received:May 06,2022
  • Revised:February 02,2023
  • Adopted:August 11,2022
  • Online: March 03,2023
  • Published: February 28,2023