质子交换膜燃料电池Pt-Fe合金催化剂的合成及性能研究

摘要

采用四步电沉积法(FSD)制备了质子交换膜燃料电池(PEMFC)用的Pt-Fe/PCE合金催化电极.利用X射线衍射光谱(XRD)和扫描电子显微镜(SEM)对催化剂的微观结构和形貌进行了表征.采用循环伏安(CV)和线性扫描伏安法(LSV)对其电化学性能进行了测试.结果表明,采用四步电沉积法制得的质子交换膜燃料电池Pt-Fe合金催化剂的颗粒粒径细小、分散性好,大大降低了催化剂的生产成本;在Pt层上镀Fe后,形成Pt-Fe合金,其催化活性也大大提高.%Pt-Fe/PCE alloy electrode catalyst for proton exchange membrane fuel cell (PEMFC) was prepared by four steps deposition (FSD).The microstructure and morphology of the as-prepared catalysts were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM).The electrocatalytic performance was measured by cyclic voltammetry (CV) and linear sweep voltammetry (LSV).The results indicated that Pt-Fe alloy catalysts for proton exchange membrane fuel cells prepared by four steps deposition had small particle size and good dispersion.The production cost of catalyst was greatly reduced.While plating Fe on the Pt layer, Pt-Fe alloy was formed, its catalytic activity was obviously improved.