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In situ growth of NiSe2 nanocrystalline array on graphene for efficient hydrogen evolution reaction |
Shuai JI1, Changgan LAI1, Huan ZHOU1, Helin WANG1, Ling MA1, Cong WANG2, Keying ZHANG3, Fajun LI3(), Lixu LEI1() |
1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China 2. School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 234000, China 3. Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, Suzhou University, Suzhou 234000, China; School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 234000, China |
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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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Keywords
nickel selenide
carbon materials
nanoparticles
hydrogen evolution reaction (HER)
microwave reaction
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Corresponding Author(s):
Fajun LI,Lixu LEI
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Online First Date: 15 June 2022
Issue Date: 21 October 2022
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