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学科主题: 物理化学
题名: Catalysis with the Nano-Structured Carbon Materials
作者: Bao XH(包信和)
会议名称: the Second Nanotechnology International Forum RusNanoTech
会议日期: 2009-10-6
出版日期: 2009-10-06
会议地点: 俄罗斯
通讯作者: 包信和
部门归属: 五室
主办者: 俄罗斯纳米技术合作协会
摘要: Carbon materials have properties different from conventional oxides in catalysis, in particular as catalyst supports. Recently, carbon nanotubes (CNTs) interest us with their well defined tubular morphology and their electron structure in the graphene walls, where π electrons shift from the inside to the outside due to the curvature. This provides an intriguing confinement environment for nanocatalysts and catalytic reactions inside such small cavities. In the present talk, the unique effects of the electron confinement with CNT’s and the resulted modulating in catalysis will be illustrated. The techniques to introduce metal nanoparticles homogeneously inside the CNT channels has been developed and the effects of confined metal catalysts on their physio-chemical properties, as well as their catalytic activities have been studied systematically. Using Fe as a probe, it is found that the redox properties of iron oxide and metallic iron are modified when they are confined inside the CNT channels. For example, the reduction of the CNT confined iron oxide is facilitated compared to that dispersed on the outer surface of CNTs. In this way, a distinct enhancement of the CNT encapsulated Fe species to the F-T process has also been revealed, which is attributed the favourable formation of the reduced iron species, e.g. iron carbides, inside the channel of CNTs. A striking enhancement of the catalytic activity 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.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/113580
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 with the Nano-Structured Carbon Materials[C]. 见:the Second Nanotechnology International Forum RusNanoTech. 俄罗斯. 2009-10-6.
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