Abstract: (Pt/Sn)-CNT hybrids with different Pt/Sn atom ratios were prepared by impregnation using a mixed solution of chloroplatinic acid and stannous chloride using carbon nanotubes (CNTs) as the supporting material, and ethylene glycol and sodium formate as reducing agents. X-ray diffraction and transmission electron microscopy were used to characterize the microstructure of the materials and showed that Pt, Sn particles were highly dispersed on CNTs with a particle size range between 3.5-6.5nm. Sn existed both in a Pt-Sn alloy and also as SnO₂. Cyclic voltammetry analysis indicated that the atomic ratios of Pt/Sn in the materials with the best electro-catalytic activity and anti-toxic abilities were between 2.5∶1 and 3.5∶1. CNTs helped improve the electrocatalytic activity for methanol oxidation.