高负载率纳米PtRu／C催化剂的制备和表征  

Preparation and Characterization of High Loading Nano PtRu/C Catalysts

作　　者：宗晔[1] 王宇[1] 林昌健[1] 

机构地区：[1]厦门大学化学化工学院固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《物理化学学报》2006年第11期1305-1309,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20021002)资助项目

摘　　要：以Vulcan XC-72R碳黑为载体,通过在含十二烷基硫酸钠(SDS)的乙二醇溶液中直接还原氯铂酸和三氯化钌,制备了负载率为60％的纳米PtRu／C催化剂．透射电镜(TEM)和X射线衍射(XRD)分析结果表明,SDS的加入可显著改善PtRu纳米颗粒在载体表面分散性,平均粒径达到2．7 nm．电化学循环伏安法(CV)测试的结果显示,利用这种方法制备的纳米PtRu/C催化剂对于甲醇氧化具有较强的抗中毒能力和较高的电催化活性．An improved preparation method for carbon supported PtRu catalysts has been developed, by reduction of Pt（Ⅳ） and Ru（Ⅲ）, using SDS as stabilizer in ethylene glycol （EG） solution. The results indicate that high loading and high dispersion of PtRu/C catalysts, with the average particle size 2.7 nm, can be obtained by this technique. The morphology, structure, and electrochemical activity of the prepared electrodes have been analyzed by TEM, XRD, and cyclic voltammeter （CV）, Compared with the PtRu/C catalysts prepared in traditional EGI solution, the as prepared nano PtRu/C catalysts possess a higher catalytic activity and a better tolerance capacity to CO in direct methanol fuel cell （DMFC）.

关 键 词：PtRu催化剂 炭黑 乙二醇 SDS 电催化 

分 类 号：O643.36[理学—物理化学]