中文摘要：

直接甲醇燃料电池（DMFC）是以固体聚合物为电解质，阳极以液相甲醇或蒸气相甲醇进料，阴极以空气或氧气为氧化剂．DMFC具有原料甲醇易储存、电池的理论电压高和能量效率高等特点，适于作电动车电源和便携式电源，具有广阔的发展前景．然而，在DMFC中，

英文摘要：

Four kinds of rare earth metal Ions（y^3＋ , Tb^3＋ , Eu^3＋ and Pr^3＋ ） were appended into the methanol aqueous solution respectively as an additive and the cyclic voltammograms of the aqueous solutions were studied. The results show that y^3＋ and Tb^3＋ had an obvious promotion effect on the electro-oxidation of methanol. The additives y^3＋ and Tb^3＋ could improve the methanol anodic oxidation current by 85%, and Eu^3＋ and Pr^3 ＋ had little promotion effect on the electro-oxidation of methanol. The results also show that the promotion effect of the rare earth metal ions were related with the electronic distribution of these elements and their adsorption on the Pt electrode surface.