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Ni-Fe Competition in the Catalytic Growth of Carbon Nanotubes

Published online by Cambridge University Press:  01 February 2011

Vladimir. Z. Mordkovich ,
D. N. Kharitonov ,
I. A. Maslov  and
E. B. Mitberg
Vladimir. Z. Mordkovich
Affiliation:
[email protected], YRD Center, Advanced Materials, Leninski pr., 55/1, str.2, Moscow, 119333, Russian Federation
D. N. Kharitonov
Affiliation:
[email protected], YRD Center, Advanced Materials, Leninski pr., 55/1, str.2, Moscow, 119333, Russian Federation
I. A. Maslov
Affiliation:
[email protected], YRD Center, Advanced Materials, Leninski pr., 55/1, str.2, Moscow, 119333, Russian Federation
E. B. Mitberg
Affiliation:
[email protected], YRD Center, Advanced Materials, Leninski pr., 55/1, str.2, Moscow, 119333, Russian Federation
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Abstract

The paper presents the results of competitive catalysis investigation of the carbon nanotube growth in situ of the partial oxidation process of methane. The competition between Ni and Fe results in suppression of Ni catalytic activity and the growth of Fe-capped carbon nanotubes. The discrimination is so strong that iron is segregated from Ni-Fe based stainless steel alloy leaving characteristic Ni-enriched corrosion caverns. The process strongly depends on temperature. Depending on particular catalyst bed composition, the nanotubes of various morphology may occur. In particular, the use of perovskite-type catalyst leads to formation of “olive-branch”-like peculiar carbon nanostructures.

Keywords

catalyticCtransmission electron microscopy (TEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 963: Symposium Q – Nanowires and Carbon Nanotubes – Science and Applications , 2006 , 0963-Q02-06
Copyright
Copyright © Materials Research Society 2007

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References

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