Au/Si载体负载单层Pt催化剂的制备及其电催化性能的研究  

Preparation of Mono-layer Pt Catalyst Supported on Au/Si and Its Electrochemical Properties

作　　者：佟浩[1] 张艳玲[1] 朱佳佳[1] 张校刚[1] 何卫[1] 杨苏东[1] 何建平[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《化学学报》2012年第10期1159-1165,共7页Acta Chimica Sinica

基　　金：中国博士后基金(No.2011M500910);南京航空航天大学基本科研业务费专项基金(No.NS2010165/56Y1066-062)资助项目~~

摘　　要：以Si纳米粉为载体,通过化学镀的方法在其表面部分沉积纳米Au颗粒后,再通过欠电位的方法在Au颗粒表面沉积了单层及亚单层的Pt.通过透射电子显微镜(TEM),循环伏安(CV)等方法对所制备的Pt/Au/Si催化剂进行了形貌及电化学性能的表征.结果表明,该单层Pt覆盖的Au/Si催化剂对于甲醇的质量电催化活性是商业E-TEK(Pt/C)的8倍,相比于不同层数的Pt,单层覆盖时Pt的利用率最高,该单层Pt负载Au/Si催化剂对于抑制CO的中毒的性能也比商业E-TEK(Pt/C)有明显的提高.By using underpotential deposition method,the mono-layer of Pt was prepared on the Au/Si supports fabricated by electroless deposition of Au on Si.The morphology and electrochemical properties of Pt/Au/Si catalyst was characterized by TEM and CV methods.The results show that the mass activity of mono-layer Pt supported on Au/Si is 8 times higher than that of commercial E-TEK（Pt/C） catalyst.Compared with the other multi-layer of Pt,the utilization ratio of mono-layer of Pt is the highest,leading to the higher electro-catalytic properties toward methanol and CO oxidation.

关 键 词：Si纳米粉 Au/Si载体 欠电位 单层Pt 电化学催化 

分 类 号：O643.36[理学—物理化学]