Abstract
Nickel selenide electrocatalysts for hydrogen evolution reaction (HER) with a high efficiency and a low-cost have a significant potential in the development of water splitting. However, the inferiority of the high overpotential and poor stability restricts their practical applications. Herein, a composite nanostructure consists of ultrasmall NiSe2 nanocrystals embedded on graphene by microwave reaction is reported. The prepared NiSe2/reduced graphite oxide (rGO) electrocatalyst exhibited a high HER activity with an overpotential of 158 mV at a current density of 10 mA/cm2 and a corresponding moderate Tafel slope of 56 mV/dec in alkaline electrolyte. In addition, a high retention of electrochemical properties (approximately 100%) was demonstrated with an unchangeable microstructure after 100 h of continuous operation.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China (No. 5007041901), the Natural Science Research Project of Anhui Provincial Education Department (KJ2020A0736 and KJ2019A0671), the Academic Funding Project for Top Talents in Disciplines of Anhui universities (gxbjZD2021 082), and Doctoral Research Foundation (No. 2019jb23) and Scientific Research Key Project (No. 2020yzd10) of Suzhou University.
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Ji, S., Lai, C., Zhou, H. et al. In situ growth of NiSe2 nanocrystalline array on graphene for efficient hydrogen evolution reaction. Front. Energy 16, 595–600 (2022). https://doi.org/10.1007/s11708-022-0827-7
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DOI: https://doi.org/10.1007/s11708-022-0827-7