摘要
采用冷冻干燥-蒸汽还原法成功合成了负载Pt纳米粒子的石墨烯燃料电池催化剂。用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)对Pt/石墨烯催化剂的表面形貌及物相组成进行了表征分析。用循环伏安法(CV)研究了Pt/石墨烯催化剂对酸性条件下甲醇的电催化氧化活性。结果表明,通过冷冻干燥后水合肼蒸汽还原的Pt/石墨烯催化剂样品,Pt颗粒粒径在20～40nm,均匀负载于石墨烯的片层结构上。当Pt负载量为10%时,催化活性最高。
Pt/Graphene fuel cell catalysts were successfully synthesized with a freeze dr- ying-vapor reduction method. The surface morphology and phase composition were characterized by scanning electron microscope （SEM）, transmission electron microscope （TEM） and X-ray diffraction （XRD）. The electrocatalytic activity of the catalysts for the oxidation of methanol was investigated by the cyclic voltammetry（CV）. The results showed that the Pt nanoparticles of the Pt/graphene catalyst synthesized with the freeze drying and vapor of hydrazine hydrate reduction method were 20--40 nm in size and were well dispersed on the surface of the graphene. The samples showed the highest photocatalytic activity when the loading of Pt was 10%.
出处
《青岛科技大学学报（自然科学版）》
CAS
北大核心
2012年第4期357-361,367,共6页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
国家自然科学基金项目(50872061)
山东省自然科学基金项目(ZR2010EM035)
青岛市科技计划基金项目(10-3-4-4-12-Jch)
关键词
石墨烯
燃料电池
冷冻干燥
循环伏安
电催化
甲醇
graphene
fuel cell
freeze drying
cyclic voltammetry
electrocatalytic
methanol
