| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation and Hydrogen Evolution Performance of Carbon-supported Nitrogen-doped Nano Tungsten Carbide Electrocatalyst |
| YAN Pengpeng1, SU Wei2, WEI Xiaofeng1,*, ZHU Xuewei1, WANG Fu1
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1 School of Mechanical and Electrical Engineering,Northwest A&F University,Yangling 712100,China
2 School of Physics and Electronic Sciences,Zunyi Normal University,Zunyi 563000,China |
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Abstract Tungsten carbide(WC) is an alternative to the costly and resource-constrained Pt-based catalysts.Herein, ammonium metatungstate (AMT), glucose (C6H12O6) and dicyandiamide (DCDA) were used as W, C and N sources.A one-step facile and easily scalable approach is reported to synthesize ultrafine WC nanocrystals supported on N-doped carbon nanosheets (NC) by molten salt. The morphology,composition and phases were characterized by SEM,TEM, XRD and XPS. Moreover, the HER performance of the catalysts in 0.5 mol/L H2SO4 was determined.The results showed that WC@NC is composed of carbon sheet and WC with uniform particle distribution. The average diameter of nanoparticles is 10—30 nm.As a result, WC@NC demonstrates remarkable hydrogen evolution reaction (HER) electrocatalytic performance with overpotentials of 132 mV at a current density of 10 mA/cm2 and Tafel slope of 64.2 mV/dec in acid media, respectively. Moreover, catalysts exhibited remarkable stability during 5 000 times cycles cyclic voltammetry(CV) sweeps and 25 h testing at the fixed overpotential.
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Published: 03 August 2021
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| Fund:Basic Research Program of Natural Science of Shaanxi Province(2019JQ-584)and the National Natural Science Foundation of China(51764017). |
About author:: Pengpeng Yan is a student of School of Mechanical and Electrical Engineering, Northwest A&F University, majoring in nanomaterial.
Xiaofeng Wei is a lecturer of School of Mechanical and Electrical Engineering, Northwest A&F University, majoring in nanomaterial. |
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2021, Vol. 35 
