氧化锡锑负载纳米Pd催化H_2O_2电还原反应的催化性能  

Electrocatalytic Performance of Pd Supported on Sb-doped SnO2Nanoparticles for H_2O_2 Reduction

作　　者：赵钦[1] 孙丽美[1] 周淑娟[1] 甄重[1] 包英荣[1] 

机构地区：[1]内蒙古民族大学化学化工学院,内蒙古通辽028000

出　　处：《贵金属》2013年第1期13-16,共4页Precious Metals

基　　金：国家自然科学基金(21003070);内蒙古自治区自然科学基金(2012MS0208)资助

摘　　要：分别以氧化锡锑(ATO)与活性炭(Vulcan XC-72)为载体,采用化学还原法制备了Pd/ATO及Pd/C催化剂,使用X射线衍射法及循环伏安曲线对催化剂进行了表征,通过线性伏安曲线及计时电流曲线考察了2种催化剂对H2O2电还原反应的催化性能。研究结果表明:Pd/ATO与Pd/C催化剂中Pd粒子的平均粒径分别为2.94 nm和8.27 nm,Pd/ATO催化剂的电化学比表面积更高,E=0.25 V时,Pd/ATO催化剂上H2O2还原反应的电流密度较Pd/C催化剂高约350 mA/mgPd。The Pd/ATO and Pd/C catalysts supported on the Sb-doped SnO2 and Vulcan XC-72 carbon powders, respectively, were prepared with chemical reduction method. The composition and structure of the catalysts were characterized with XRD and cyclic voltammetry. And the performance of the two catalysts on H202 reduction was studied by linear voltammetry and chronoamperometry. The results showed that the average particles size of Pd in the Pd/ATO and Pd/C catalysts were 2.94 nm and 8.27 nm, respectively. And the specific surface area of the Pd/ATO catalyst is larger than that of the Pd/C catalyst. The current density of the Pd/ATO catalyst on H202 electroreduction was 350 mA/mgpd, higher than that of Pd/C catalyst at E=0.25 V. The Sb-doped SnO： advanced the performance of the Pd catalyst.

关 键 词：氧化锡锑(ATO) Pd H2O2电还原 催化 燃料电池 

分 类 号：O643.46[理学—物理化学]