高等学校化学学报

高等学校化学学报

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室温制备高合金化Pt-Ru/CMK-3催化剂及其对甲醇的电催化氧化

吴伟1, 曹洁明1, 陈煜2, 刘劲松1, 曹喻霖1, 房宝青1, 何建平1, 唐亚文2, 杨春2, 陆天虹2   

    1. 南京航空航天大学材料科学与技术学院, 南京 210016;
    2. 南京师范大学化学系, 南京 210097
  • 收稿日期:2006-03-24 修回日期:1900-01-01 出版日期:2006-12-10 发布日期:2006-12-10
  • 通讯作者: 曹洁明

Preparation of High Alloying Pt-Ru/CMK-3 Catalysts at Room Temperature and Electrocatalytic Oxidation of Methanol

WU Wei1, CAO Jie-Ming1, CHEN Yu2, LIU Jin-Song1, CAO Yu-Lin1, FANG Bao-Qing1, HE Jian-Ping1, TANG Ya-Wen2, YANG Chun2, LU Tian-Hong2
   

    1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. Department of Chemistry, Nanjing Normal University, Nanjing 210097, China
  • Received:2006-03-24 Revised:1900-01-01 Online:2006-12-10 Published:2006-12-10
  • Contact: CAO Jie-Ming

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被引次数

17

摘要： 通过低温络合反应制备了高分散高合金化的Pt-Ru固溶体, 并将其均匀地担载在有序介孔碳CMK-3上, 以形成二元复合金属催化剂. XRD谱图表明,fcc结构的Pt原子部分被hcp结构的Ru原子取代形成置换固溶体， 而且几乎没有未形成合金的Ru存在. TEM和XRD研究结果表明， Pt-Ru/CMK-3催化剂中Pt-Ru合金粒子的平均粒径为27 nm, 且具有良好的均一度. 还研究了催化剂对甲醇的电催化氧化性能, 并与E-TEK公司同类催化剂进行了对比, 研究结果表明, Pt-Ru/CMK-3催化剂具有较大的电化学活性面积, 对甲醇的电催化氧化性能和抗CO中毒能力明显优于其它同类催化剂.

关键词: DMFC, Pt-Ru/CMK-3, 络合反应, 介孔材料, 甲醇电催化氧化

Abstract: High-alloying Pt-Ru solid solution was prepared by complexing reaction and uniformly dispersed on rigid ordered mesoporous carbon CMK-3 to form the two-element composite catalysts. XRD patterns show that Pt atoms with fcc structure were almost replaced by Ru atoms with hcp structure. XRD and TEM measurements indicate that the average diameter is 2.7 nm with a uniform size. The electrocatalytic activity of Pt-Ru/CMK-3 for the ethanol oxidation was studied and compared with that of Pt-Ru/XC-72 of E-TEK congeneric catalyst. The results show that the catalyst of Pt-Ru/CMK-3 possesses a bigger electrocatalytic activity area, the electrocatalytic activity for the oxidation of methanol and the ability of resisting CO poison exceed the same kind catalysts because of the appropriate extent of alloying and average particle diameter.

Key words: DMFC, Pt-Ru/CMK-3, Complexing reaction, Mesoporous materials, Electrocatalytic oxidation of methanol

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