有序介孔碳载钯的制备、表征及对甲酸的电催化氧化性能  

Electrooxidation of Formic Acid on Palladium Nanoparticles Supported on Ordered Mesoporous Carbon

作　　者：陈明晖[1] 贺春兰[1] 张斌伟[1] 姜艳霞[1] 陈声培[1] 孙世刚[1] 

机构地区：[1]固体表面物理化学国家重点实验室,厦门大学化学化工学院化学系,厦门361005

出　　处：《高等学校化学学报》2012年第2期331-335,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20833005,20873116,60936003)资助

摘　　要：通过浸渍法和硫引入贵金属法分别制备了主要负载在介孔碳主孔道(MPC/Pd-1)和负载在介孔碳孔壁上小介孔中[MPC/(S)Pd-2]的两类负载型钯电催化剂,用XRD,SEM,TEM和电化学等方法表征了其结构和电催化性能.循环伏安结果表明,有序介孔碳载钯催化剂MPC/Pd-1和MPC/(S)Pd-2对甲酸氧化的催化活性分别是商用钯黑催化剂的4.0和2.4倍.MPC/Pd-1中的钯位于介孔碳的主孔道上,增加了催化剂/电解质/反应物三相界面的面积,使得其比MPC/(S)Pd-2的催化活性更高.Ordered mesoporous carbon（MPC） supported palladium catalysts were prepared by impregnation（MPC/Pd-1） and the method of using sulfur to embed noble metal,respectively.The properties of the MPC/Pd were investigated by XRD,HRTEM,BET and electrochemical methods.Cyclic voltammetry and current-time curve show that MPC/Pd exhibits a very high catalytic activity for the oxidation of formic acid,which is 4.0（MPC/Pd-1） and 2.4 times that of commercial Pd black.Pd nanoparticles on MPC/Pd-1 are confined in the pores of MPC（5—6 nm）,which increases the reaction interfaces of the three-phase boundary（catalyst-electrolyte-reactive）,whereas Pd nanoparticles on MPC/（S）Pd-2 are loaded inside the small mesoporous of the pore wall（2—3 nm）,which decreases utilization of the catalyst.

关 键 词：介孔碳 钯 甲酸 电催化氧化 

分 类 号：O646[理学—物理化学]