微波辅助合成纳米SnO_2及其在乙醇电催化中的应用  

MICROWAVE ASSISTED SYNTHESIS OF SnO_2 PARTICLES AND ITS APPLICATION IN ETHANOL ELECTRO-CATALYSIS

作　　者：张新卫[1] 朱红[2] 郭志军 魏永生[1] 王芳辉[2] 

机构地区：[1]北京交通大学理学院,北京100044 [2]北京化工大学理学院现代催化研究所,北京100029

出　　处：《太阳能学报》2011年第5期756-760,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金项目(20876013);国家自然科学基金重点项目(20636060);国际科技合作项目(2009DFA63120)

摘　　要：以水合氯化亚锡、乙二醇和水为原料,常压下经微波加热制备了粒径均匀的纳米SnO2颗粒,并将其应用到催化剂Pt-SnO2/C中。通过XRD和TEM对制备的SnO2颗粒和催化剂的微观结构进行表征,结果表明,微波辅助合成的SnO2为四方晶相,大小约为2.0nm,粒径均一。循环伏安和计时电流测试表明Pt-SnO2/C比商业化催化剂具有更高的乙醇催化氧化活性。Nano-SnO2 particles were prepared by microwave heating ethylene glycol solutions containing SnCl2·2H2O and water at atmospheric pressure. Moreover, the nano-SnO2 particles were employed to synthesize Pt-SnO2/C catalyst. The microstructures of nano-SnO2 particles and catalysts were characterized by means of transmission electron microscopic （TEM）, X-ray diffraction （XRD）. TEM micrographs show that the nano-SnO2 nano-SnO2 particles are spherical shape with around 2.0nm in diameter. The XRD pattern results showed that the obtained powder is SnO2 with tetragonal crystal- line structure. Cyclic vohammetry and chronoamperometry showed that Pt-SnO2/C have much higher catalytic activity and CO tolerance for ethanol electroxidation than that of commercial Pt/C（JM）.

关 键 词：燃料电池 二氧化锡 电催化剂 乙醇氧化 

分 类 号：TM911.4[电气工程—电力电子与电力传动]