Mo对石墨烯负载PtRu催化剂甲醇电氧化促进作用  

Promoting effect of Mo in graphene supported PtRuMo catalyst for methanol electro-oxidation

作　　者：曹小荣[1] 叶飞[1,2] 余林[1] 陈胜洲[2] 林维明[2] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006 [2]广州大学化学化工学院,广东广州510006

出　　处：《电源技术》2013年第2期222-225,共4页Chinese Journal of Power Sources

摘　　要：采用Hummers液相氧化法合成氧化石墨,进而在室温下采用浸渍还原法制得石墨烯(G)负载的PtRu/G和PtRuMo/G催化剂。采用X射线衍射(XRD)、能量散射X射线谱(EDX)及扫描电镜(SEM)对氧化石墨和催化剂进行了表征,并使用交流阻抗法(EIS)、线性扫描伏安法(LSV)和计时安培法(CA)测试了催化剂催化甲醇电氧化的性能。结果表明:PtRuMo/G和PtRu/G催化剂的粒径分别为4.7、6.4 nm,PtRuMo/G催化剂催化甲醇电氧化的活性和稳定性都高于PtRu/G催化剂,Mo对PtRu/G催化剂的掺杂改性具有良好的促进作用。Graphene supported PtRuMo catalyst （PtRuMo/G） was prepared by chemical reduction of graphite oxide （GO） and metal precursors with sodium borohydride at room temperature. The crystallographic properties and composition of the catalysts were characterized by X-ray diffraction （XRD） and energy dispersive X-ray （EDX） analysis, and the catalytic activity and stability for methanol electro-oxidation were measured by electrochemical impedance spectroscopy （EIS）, linear sweep voltammetries （LSV） and chronoamperometry （CA）. The results show that the particle size of PtRuMo/G catalyst is about 4.7 nm, and the catalytic activity and stability of the PtRuMo/G catalyst are higher than those of PtRu/G catalyst.

关 键 词：石墨烯 甲醇电氧化 PtRuM0 G催化剂 直接甲醇燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]