WS2/C复合材料的制备及其电催化析氢性能研究

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

  • 摘要: 以H2WO4和EDA为前驱体,通过机械搅拌与原位固相热解,得到WO3/C中间体,通过高温硫化得到WS2/C复合材料。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)等仪器分析方法对制备的WS2/C复合材料结构和形貌等进行表征。同时对材料进行了电催化稳态极化曲线(LSV)、塔菲尔斜率(Tafel)、循环稳定性(CP)和电化学阻抗(PEIS)和电化学活性表面积(ECSA)测试,分析了催化剂的电催化性能。结果表明,当WS2/C复合材料的电流密度为10 mA/cm2时,过电位为179 mV,Tafel斜率为98 mV/dec。

     

    Abstract: With H2WO4 and EDA as precursors, WO3/C intermediate was obtained by mechanical stirring and in-situ solid-phase pyrolysis, then WS2/C composite material was obtained by high temperature vulcanization. The WS2/C composite was 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 show 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.

     

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