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学科主题: 物理化学
题名: Confinement effects of carbon nanotubes in catalytic energy conversion processes
作者: Pan XL(潘秀莲) ;  Bao XH(包信和)
会议文集: Abstract Book
会议名称: International Conference on Clean Energy Science 2011
会议日期: 2011-4-10
出版日期: 2011
会议地点: 大连
通讯作者: 潘秀莲 ;  包信和
出版者: 待补充
出版地: 待补充
合作性质: 墙报
部门归属: 502组
主办者: 大连化物所
摘要: Carbon materials have properties different from conventional oxides in catalysis, in particular as catalyst supports. Recently, carbon nanotubes (CNTs) attract attention 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. 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 with respect to those dispersed on the outer surface of CNTs. As a result, its activity for Fischer-Tropsch synthesis is obviously enhanced benefiting from formation of more catalytically active iron carbides under reaction conditions. Similarly, a significant enhancement of the catalytic activity of Rh particles confined inside nanotubes for the conversion of syngas to C2 oxygenates has also been observed compared to the outside catalyst although the latter is much better accessible to reactants. The confinement effects of CNTs in other catalytic energy conversion processes are also reported recently.
英文摘要: Carbon materials have properties different from conventional oxides in catalysis, in particular as catalyst supports. Recently, carbon nanotubes (CNTs) attract attention 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. 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 with respect to those dispersed on the outer surface of CNTs. As a result, its activity for Fischer-Tropsch synthesis is obviously enhanced benefiting from formation of more catalytically active iron carbides under reaction conditions. Similarly, a significant enhancement of the catalytic activity of Rh particles confined inside nanotubes for the conversion of syngas to C2 oxygenates has also been observed compared to the outside catalyst although the latter is much better accessible to reactants. The confinement effects of CNTs in other catalytic energy conversion processes are also reported recently.
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/116126
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:
Pan XL,Bao XH. Confinement effects of carbon nanotubes in catalytic energy conversion processes[C]. 见:International Conference on Clean Energy Science 2011. 大连. 2011-4-10.
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