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中文摘要：
采用两步化学还原法制备不同壳层厚度的核壳型Co-Pt纳米粒子。采用X射线衍射光谱（XRD）、X射线光电子能谱（XPS）及透射电镜（TEM）技术表征催化剂的结构和组成,用旋转圆盘电极动电位扫描法测试其对氧还原反应的催化性能。结果表明：核壳型Co-Pt纳米粒子直径约30 nm;相对于Pt/C,Co-Pt/C具有更高的电催化氧还原活性和抗甲醇性,催化剂随着Pt壳层厚度的增加氧还原活性增大,抗甲醇能力逐渐降低。随着甲醇浓度的增加,氧还原起始过电位增大,峰电流密度减小。
英文摘要：
Core-shell structure Co-Pt nano-particles with different thickness of Pt shell were synthesized by two-step chemical reduction method and characterized by x-ray diffraction,x-ray photoelectron spectroscopy and transmission electron microscopy.Catalytic activity and methanol-resistance of electro-catalysts were tested by the potentiodynamic method on rotating disk electrode.The results indicate that size of Co-Pt nano-particles was about 30 nm.The activity of ORR and the methanol-resistance of Co-Pt/C were better than Pt/C.With increasing Pt shell thickness,the ORR activity of the catalysts became higher,but the methanol-resistance went worse.And with increasing methanol concentration in electrolyte,onset over-potential of oxygen reduction increased and peak current density decreased.
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