Preparation of Pd-based tri-metal nano-composites and its application in direct formic acid fuel cells

Abstract

Carbon loaded Pd-Cu-Fe catalysts (Pd-Cu-Fe/C) were fabricated with a novel strategy of partly etching carbon loaded tunable binary Cu-Fe alloy templates (Cu9Fe1, Cu8Fe2, Cu7Fe3) with Pd2+. Compared with Pd/C catalysts, the anodic peak potential at the catalysts started from Cu9Fe1, Cu8Fe2 and Cu7Fe3 shifted toward negative value by 51 mV, 88 mV and 110 mV, respectively. Among them, catalyst started from exhibited the highest catalytic activity and a high stability which suggest the Cu7Fe3 template is a good candidate for the formic acid fuel cell. The characteristics of the Pd-Cu-Fe/C ternary catalysts were correlated using X-ray diffraction analysis,transmission electron microscopy, and electrochemical measurements.

碳负载的Pd-Cu-Fe（Pd-Cu-Fe / C）催化剂是由Pd2 +部分刻蚀可调二元Cu-Fe合金模板（Cu9Fe1，Cu8Fe2，Cu7Fe3）的新策略制成的。与Pd / C催化剂相比，由Cu9Fe1, Cu8Fe2 and Cu7Fe3 模板部分刻蚀所得的催化剂的阳极峰电位分别负移了51 mV，88 mV和110 mV。其中，由Cu7Fe3模板所制得的催化剂表现出很高的催化活性和稳定性。表明它是甲酸燃料电池的一个很好的催化剂候选物。本次实验研究使用了X射线衍射分析，透射电子显微镜和电化学测量的方法对Cu-Fe / C三元催化剂进行了相关性质的分析。