直接甲醇燃料电池PtRuMo/C电催化剂的制备和性质  

Preparation and Characteristics of Carbon-supported PtRuMo Electrocatalyst for DMFC

作　　者：陈胜洲[1] 林维明[1] 董新法[2] 

机构地区：[1]广州大学化学化工学院,广州510006 [2]华南理工大学化工与能源学院

出　　处：《应用化学》2006年第9期1032-1036,共5页Chinese Journal of Applied Chemistry

基　　金：广州市科技局计划项目(2005J1-C0361);广州市教育局重点项目(2052)

摘　　要：研究了混合溶液浸渍、液相还原方法制备的甲醇氧化电催化剂PtRuMo/C的物理化学和电化学性质。XPS、XRD和电化学特性研究结果表明,PtRuMo/C催化剂中存在PtRu合金相,而Mo则以氧化物的型式存在。XRD测得的催化剂平均粒经为7 nm。以自制的PtRuMo/C阳极催化剂和Pt/C催化剂为阴极催化剂,组装了直接甲醇燃料电池并测试了电池性能。结果表明,PtRuMo/C具有较好的甲醇催化氧化性能,影响阳极在大电流密度下放电的主要因素是催化层中高的质子传递电阻。XRD, XPS, EDS and electrochemical methods were used to characterize the physical and chemical properties of the carbon-supported PtRuMo catalyst prepared by the liquid-phase reduction method. It was found that there were crystalline face-centered cubic phases in the Pt/C, PtRu/C, PtRuMo/C catalysts, and PtRu alloy and MoOx species in catalyst PtRuMo/C. The particle size of the catalyst PtRuMo/C powder was about 7 nm determined by means of XRD. Membrane-electrode assemblies with the home-made anode （PtRuMo/C） and cathode（Pt/C） catalysts were manufactured and tested in DMFC. The results show that the PtRuMo/C catalyst has a good electrocatalytic activity, and a high proton conductivity in the active catalyst laver.

关 键 词：直接甲醇燃料电池 电催化剂 甲醇电氧化 

分 类 号：O646[理学—物理化学] TM911[理学—化学]