Abstract: Using impregnation-chemical reduction method,we prepared two Pt/C nano-catalysts with different platinum content and Pt-Mn/C,Pt-Co/C nano-alloy catalyst.The size,structure and lattice constant of these types of catalysts were characterized by XRD and TEM techniques.Then we tested the cyclic voltammetry,linear sweep voltammetry and current-time curve of the four catalysts.The results show that: the average particle size of the four catalysts are below 10 nm,and Pt-Mn/C,Pt-Co/C are smaller than two pure Pt /C catalysts;four catalysts are all face-centered cubic crystal structure;compared with Pt/C catalyst,the lattice constants of the two alloy catalysts have been reduced,and have a lower degree of crystallinity.The electrochemical performance tests show that: compared with the two kinds of pure Pt catalyst,two Pt alloy catalysts have a higher reductive peak potential and peak current,and Pt-Co/C catalyst has the highest reductive peak potential and peak current.The stability of the two kinds of alloy catalyst is superior to both pure Pt catalysts.