State of the catalyst during carbon nanotube growth

被引：82
|
作者：
Wirth, C. T. [1 ]
Hofmann, S. [1 ]
Robertson, J. [1 ]
机构：
[1] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England
来源：
DIAMOND AND RELATED MATERIALS | 2009年 / 18卷 / 5-8期
关键词：
carbon nanotubes; growth mechanism; chemical vapour deposition; catalyst; CHEMICAL-VAPOR-DEPOSITION; GAS-PHASE SYNTHESIS; NANOPARTICLE CATALYSTS; METAL NANOPARTICLES; SUPPORTED CATALYSTS; GOLD; MECHANISM; TEMPERATURE; NUCLEATION; SPECTROSCOPY;
D O I：
10.1016/j.diamond.2009.01.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We review our in-situ X-ray photoemission (XPS) and in-situ transmission electron microscopy studies which determined that the catalyst is in the metallic state for Fe. Co and Ni catalysts. We show that the existence of surface carbide phases in related catalytic reactions could account for the observation of carbide peaks in XPS. The observed catalytic activity of gold is discussed in terms of carbon solubility. reaction rates, and surface coordination numbers. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：940 / 945
页数：6
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