太原理工大学学报2011，Vol.42Issue(5)：451-456,461,7.
Cocore Pdshell/C核壳型纳米粒子电催化氧还原性能
Performance of CocorePdshell/C Nanoparticles for Electrocatalytic Reduction of Oxygen
摘要
Abstract
The Cocore Pdshell nanoparticles with various shell thickness were prepared by template synthesis of colloid particles, and characterized by XRD, TEM and EDS. The results show that Cocore Pdshell nanoparticles are spherical and the Co nanoparticles act as seeds to guide the growth of face-centered-cubic Pd. The mean particle diameter of Co1Pd2 is about 10 nm with a relatively narrow size distribution. The electrocatalytic activities of the catalysts for oxygen reduction reaction(ORR) and methanol tolerance were characterized by electro-chemistry methods. The Ccocore Pdshell/C nano catalysts showed higher catalytic activities than Pd/C catalysts, even close to the Pt/C. For synthesized Cocore Pdshell catalysts, the highest catalytic activity for the ORR was found at n(Pd) :n(Co) atomic ratio of 2:1, giving current density of 175. 5 mA/mg. Because the Cocore Pdshell catalyst is inactive for the adsorption and oxidation of methanol, it may function as a methanol-tolerant ORR catalyst in direct methanol fuel cell.关键词
CocorePdshll/电催化/氧还原/抗甲醇/直接甲醇燃料电池Key words
Cocore Pdshell/electrocatalysis/oxygen reduction/methanol resistant property/direct methanol fuel cell rect methanol fuel cell分类
化学化工引用本文复制引用
刘世斌,李蓉,张忠林,郝晓刚,段东红,卫国强,马艳华..Cocore Pdshell/C核壳型纳米粒子电催化氧还原性能[J].太原理工大学学报,2011,42(5):451-456,461,7.基金项目
国家自然科学基金资助项目(20676088) （20676088）
教育部博士点基金资助项目(20091402110009) （20091402110009）
