高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (02): 331-335.doi: 10.3969/j.issn.0251-0790.2012.02.021

• 物理化学 • 上一篇    下一篇

有序介孔碳载钯的制备、表征及对甲酸的电催化氧化性能

陈明晖, 贺春兰, 张斌伟, 姜艳霞, 陈声培, 孙世刚   

  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
  • 收稿日期:2011-06-10 出版日期:2012-02-10 发布日期:2012-01-13
  • 通讯作者: 孙世刚, 男, 博士, 教授, 博士生导师, 主要从事表面电化学研究. E-mail: sgsun@xmu.edu.cn 姜艳霞, 女, 博士, 教授, 主要从事电催化研究. E-mail: yxjiang@xmu.edu.cn E-mail:sgsun@xmu.edu.cn;yxjiang@xmu.edu.cn
  • 基金资助:

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

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

CHEN Ming-Hui, HE Chun-Lan, ZHANG Bin-Wei, JIANG Yan-Xia, CHEN Sheng-Pei, SUN Shi-Gang   

  1. State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
  • Received:2011-06-10 Online:2012-02-10 Published:2012-01-13

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.

关键词: 介孔碳, 钯, 甲酸, 电催化氧化

Abstract: Ordered mesoporous carbon(MPC) supported palladium catalysts were prepared by impregnation(MPC/Pd-1) and the method of using sulfur to embed noble metal[MPC/(S)Pd-2], 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[MPC/(S)Pd-2] 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.

Key words: Mesoporous carbon, Palladium, Formic acid, Electrooxidation

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