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学科主题: 物理化学
题名: Catalysis Chemistry in Confined Channel of Carbon Nanotube
作者: Bao XH(包信和)
会议名称: The 3rd International Symposium on Carbon for Catalysis
会议日期: 2008-11-9
出版日期: 2008-11-09
会议地点: 德国
通讯作者: 包信和
部门归属: 五室
主办者: 德国马普学会Fritz-Haber研究所
摘要: Carbon nanotubes(CNTs) have well defined hollow interiors and exhibit unusual mechanical and thermal stability as well as electron conductivity. This opens intriguing possibilities to introduce other matter into the cacities, which may lead to nanocomposite materials with interesting properties or behaviour different from the bulk. The presentation will be focused on the application of nanorelated science and technology in the field of catalysis, with an emphasis on the electron properties of the confined systems and the synergetic confinement effects between the encapsulated metallic nanoparticle and carbon nanotubes. Two unique properties concerning the redox and catalysis of the CNT-encapsulated metals and metal oxides will be addressed. The auto-reduction of the encapsulated Fe2O3 is significantly facilitated inside CNTs with respect to the outside nanoparticles, and it becomes more facile with decreasing CNT channel diameter as evidenced by temperature programmed reaction, in situ XRD and Raman spectroscopy. The oxidation of encapulated metallic Fe nanopraricles on the other hand is retarded in comparison to that of the outside Fe particles as shown by in situ XRD and gracimetrical measurements with an lonlene microbalance. A striking enhancement of the catalytic acticity of Rh particles confined inside nanotubes for the conversion of CO and H2 to ethanol has been found. The overall formation rate of ethanol inside nanotubes exceeds that on the outside of the nanotubes by more than an order of magnitude, although the latter is much better accessible. We attribute these unique behaviours'' of transition metal nanoparicles inside CNTs to a particular electronic interaction of the encapsulates with the interior CNT surface.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/113034
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Bao XH. Catalysis Chemistry in Confined Channel of Carbon Nanotube[C]. 见:The 3rd International Symposium on Carbon for Catalysis. 德国. 2008-11-9.
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