金属蒸气法制备聚合物固载Pd—Cu燃料电池电极

利用金属蒸气法制备了三种不同金属重量比的树脂固我及活性炭负载Pd－Cu双金属催化剂。透射电镜（TEM）和X射线衍射（XRD）测定结果表明催化剂中Pd—Cu已形成合金。合金粒度极小，平均直径小于5nm。树脂固载催化剂金属粒度远小于活性炭负载催化剂的金属粒度。X－射线光电子能谱（XPS）结果表示Pd和Cu均以零价态存在。极化曲线表明，树脂固载催化剂的电催化活性接近于相应的活性炭负载催化剂。

PREPARATION OF POLYMER IMMOBILIZED Pd-Cu FUEL CELL ELECTRODE BY METAL VAPOR METHOD

The metal vapor method was used to prepare resin and active carbon supported mission electron micrograph (TEM) and X-ray diffraction(XRD) measurements showed that Pd-Cu alloy was formed and the particle sizes of the alloy were very small, with average diameters< 5. 0nm. The metal particle sizes of resin supported catalysts were much smaller than that of active carbon supported catalysts. X -ray photoelectron spectroscopy indicated that both Pd and Cu were in zero-valent state. Polarization Curves showed that the electro-catalytic activities of resin supported Pd-Cu catalysts were close to that of the active carbon supported Pd-Cu catalysts.