催化学报 ›› 2007, Vol. 28 ›› Issue (1): 17-21.

• 研究论文 • 上一篇    下一篇

以多聚甲醛为还原剂制备新型阳极Pt/CMK-3催化剂

吴伟1,曹洁明1,陈煜2,陆天虹2   

  1. 1 南京航空航天大学材料科学与技术学院, 江苏南京 210016; 2 南京师范大学化学与环境科学学院, 江苏南京 210097
  • 收稿日期:2007-01-25 出版日期:2007-01-25 发布日期:2010-08-28

Preparation of Pt/CMK-3 Anode Catalyst for Methanol Fuel Cells Using Paraformaldehyde as Reducing Agent

WU Wei1, CAO Jieming1*, CHEN Yu2, LU Tianhong2   

  1. 1 College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; 2 Department of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, Jiangsu, China
  • Received:2007-01-25 Online:2007-01-25 Published:2010-08-28

摘要: 以多聚甲醛为还原剂,采用液相还原法制备了Pt/CMK-3直接甲醇燃料电池(DMFC)阳极催化剂,并采用透射电镜和X射线衍射技术对其进行了表征. 结果表明,有序介孔碳CMK-3具有规整的二维有序孔道结构,为DMFC中电子和燃料的传输提供了方便的路径,同时它较大的比表面积使得Pt纳米粒子很好地分散在其表面; Pt/CMK-3催化剂中Pt粒子的平均粒径为2.8 nm, 小于E-TEK公司的商品化Pt/XC-72和以甲醇为还原剂制备的Pt/C-M催化剂,并且粒径分布范围窄,结晶度低. 察了Pt/CMK-3催化剂对甲醇的电催化氧化性能,发现Pt/CMK-3催化剂对甲醇氧化的电催化性能优于Pt/XC-72和Pt/C-M催化剂.

关键词: 铂, CMK-3介孔材料, 多聚甲醛, 甲醇, 直接甲醇燃料电池

Abstract: The Pt/CMK-3 anode catalyst for direct methanol fuel cells (DMFC) was prepared by the liquid reduction method using paraformaldehyde as the reducing agent. The catalyst was characterized by X-ray diffraction and transmission electron microscopy. The results showed that CMK-3 was a highly intriguing support material for DMFC because of its high surface area, uniform mesopores, and high thermal and chemical stability. The average particle size of Pt nanoparticles in Pt/CMK-3 was 2~8 nm, which was smaller than that of the commercial Pt/XC-72 catalyst from the E-TEK Corporation and that of the Pt/C-M catalyst prepared using methanol as the reducing agent. The particle size distribution of Pt/CMK-3 was narrow, and the relative crystallinity was low. The electroactivity of Pt/CMK-3 for ethanol oxidation was studied. The Pt/CMK-3 catalyst possessed higher electrocatalytic activity than Pt/XC-72 and Pt/C-M catalysts.

Key words: platinum, CMK-3 mesoporous material, paraformaldehyde, methanol, direct methanol fuel cell