This work dealt with the catalytic behavior of PtCeO_x/C catalysts with different Pt:Ce molar ratios. The catalysts were preapred by co-impregnation and thier activities on MeOH electro-oxidation were evaluated by dynamic potential methods. Their properties were also investigated by means of physico-chemical characterization (XRD, TPR and BET). Carbon-manganese oxide composite(CMnO_x) as a support in DMFC anode was adopted. CMnO_x with or without heat-treatment was used for supporting Pt, and each of them showed two to three times higher activity on MeOH electro-oxidation, respectively. From the results of various characterizations, CMnO_x was believed to have better properties than carbon but for specific surface area.