Preparation of WS2/C composite material and its electrocatalytic hydrogen evolution performance

With H2WO4 and EDA as precursors, WO3/C intermediate is obtained by mechanical stirring and in-situ solid-phase pyrolysis, then WS2/C composite material is obtained by high temperature vulcanization. The WS2/C composite is characterized by X-ray diffraction (XRD), scanning electron microscope (SEM),...

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Bibliographic Details
Published inJournal of fuel chemistry and technology Vol. 49; no. 9; pp. 1362 - 1370
Main Authors WAN, Lei, SHI, Chun-wei, YU, Zong-bao, WU, Hong-da, XIAO, Wei, GENG, Zhong-xing, REN, Tie-qiang, HAN, Qiao, YANG, Zhan-xu
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2021
Subjects
electrocatalysis
hydrogen evolution reaction
WS2
electrocatalysis
WS2
hydrogen evolution reaction
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Summary:With H2WO4 and EDA as precursors, WO3/C intermediate is obtained by mechanical stirring and in-situ solid-phase pyrolysis, then WS2/C composite material is obtained by high temperature vulcanization. The WS2/C composite is characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and other instrumental analysis methods. At the same time, the electrocatalytic performance of the catalyst was analyzed by the electrocatalytic steady-state polarization curve (LSV), Tafel slope (Tafel), cycle stability (CP), electrochemical impedance (PEIS) and Electrochemically Active Surface Area (ECSA) tests of the material. The results showed that when the current density of the WS2/C composite is 10 mA/cm2, overpotential is 179 mV, and Tafel slope is 98 mV/dec.
ISSN:1872-5813
1872-5813
DOI:10.1016/S1872-5813(21)60078-6