In this paper, PtAuFe/C composite catalyst and Pt/C catalyst are prepared by sodium borohydride direct reduction method. The physical properties of the catalysts are characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The electrocatalytic hydrogen evolution performance of the prepared catalysts is tested by linear scanning voltammetry (LSV) in H₂SO₄ solution. The results show that the PtAuFe/C composite catalyst has larger specific surface area, smaller overpotential, higher polarization current density and better stability than that of the Pt/C catalyst. The hydrogen evolution mechanism of PtAuFe/C composite catalyst is determined by Tafel curve, and the results show that PtAuFe/C composite catalyst is of composite desorption mechanism. In addition, the effect of temperature and electrolyte concentration on the performance of PtAuFe/C composite catalyst is also studied.

本文采用硼氢化钠直接还原法制备了PtAuFe / C复合催化剂和Pt / C催化剂。催化剂的物理性质通过X射线衍射（XRD），扫描电子显微镜（SEM）和能量色散光谱仪（EDS）表征。通过线性扫描伏安法（LSV）在H ₂ SO _4中测试了制备的催化剂的电催化制氢性能。解。结果表明，PtAuFe / C复合催化剂比Pt / C催化剂具有更大的比表面积，较小的超电势，更高的极化电流密度和更好的稳定性。通过Tafel曲线确定了PtAuFe / C复合催化剂的析氢机理，结果表明PtAuFe / C复合催化剂具有复合解吸机理。此外，还研究了温度和电解质浓度对PtAuFe / C复合催化剂性能的影响。