物理化学学报 >> 2006, Vol. 22 >> Issue (08): 967-971.doi: 10.1016/S1872-1508(06)60042-9

研究论文 上一篇    下一篇

Pt/洋葱状富勒烯催化剂的结构表征及生成机理研究

杨晓伟;郭俊杰;王晓敏;刘旭光;许并社   

  1. 太原理工大学 材料科学与工程学院; 教育部新材料界面与工程重点实验室 太原030024
  • 收稿日期:2006-02-09 修回日期:2006-03-13 发布日期:2006-08-04
  • 通讯作者: 许并社 E-mail:xubs@public.ty.sx.cn

Study on Characterizations and Growth Mechanism of Pt/Onion-like Fullerenes Catalyst

YANG Xiao-Wei;GUO Jun-Jie;WANG Xiao-Min;LIU Xu-Guang;XU Bing-She   

  1. College of Materials Science and Engineering, Taiyuan University of Technology, P. R. China;Key Laboratory of Interface Science and Engineering in Advanced Materials of Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, P. R. China
  • Received:2006-02-09 Revised:2006-03-13 Published:2006-08-04
  • Contact: XU Bing-She E-mail:xubs@public.ty.sx.cn

摘要: 采用化学气相沉积法(CVD)制备了洋葱状富勒烯(onion-like fullerenes, OLFs),并通过硝酸处理法对其进行了预处理。采用浸渍还原法,使用三种不同含量的甲醛(HCHO)为还原剂,制备了Pt/OLFs催化剂。XRD谱图表明使用过量HCHO有助于Pt晶粒的生长。高分辨透射电镜(HRTEM)分析结果表明使用过量甲醛作还原剂制备的Pt/OLFs催化剂中Pt颗粒分散均匀、直径分布在2.5~3.5nm之间。实验证明过量HCHO在洋葱状富勒烯负载Pt过程中起到了重要的还原作用。

关键词: 洋葱状富勒烯, Pt/OLFs 催化剂, 还原剂, 表征, 生成机理

Abstract: Onion-like Fullerenes (OLFs) were prepared by CVD method, and purified by nitric acid treatment. 10wt. %Pt/OLFs catalyst was prepared by impregnation-reduction method with three different loadings of formaldehyde as the reducing agent and the morphology and structure were characterized. XRD patterns showed the excessive reducer benefits the growth of Pt crystals. HRTEM images showed that Pt particles with the diameter of 2.5nm~3.5nm had well distribution in the Pt/OLFs composite. FTIR spectrum also indicated lots of functional groups existed on the surface of OLFs purified. The reducing action of formaldehyde in the process of supporting was discussed.

Key words: Onion-like fullerenes(OLFs);Pt/OLFs catalyst;Reductive;Characterizations, Growth mechanism

MSC2000: 

  • 0644