全文下载：2012040357
牟军， 高阳， 刘宝刚， 蒋全通， 朱海涛*
（青岛科技大学 材料科学与工程学院，山东 青岛 266042）
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20~40 nm，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。
关键词: 石墨烯; 燃料电池; 冷冻干燥; 循环伏安; 电催化; 甲醇
中图分类号： TQ 426.81 文献标志码： A
收稿日期：2011-12-21
基金项目： 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）.
作者简介： 牟军（1986—），男，硕士研究生. *通信联系人.
Synthesis, Characterization and Properties of Pt/Graphene Fuel Cell Catalyst
MOU Jun, GAO Yang, LIU Bao-gang, JIANG Quan-tong, ZHU Hai-tao
(College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: Pt/Graphene fuel cell catalysts were successfully synthesized with a freeze drying-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%.
Key words: graphene; fuel cell; freeze drying; cyclic voltammetry; electrocatalytic; methanol
