Synergistic effects in FeCu bimetallic catalyst for low temperature growth of single-walled carbon nanotubes

A series of MgO-supported FeCu catalysts with different metal concentrations has been studied for synthesizing single-walled carbon nanotubes (SWCNTs). Spectroscopic characterization results have revealed that the concentrations of Fe and Cu are crucial for the purity of the produced SWCNTs, but hav...

Full description

Saved in:
Bibliographic Details
Published in:Carbon (New York) 2013-02, Vol.52, p.590-594
Main Authors: He, Maoshuai, Chernov, Alexander I., Obraztsova, Elena D., Jiang, Hua, Kauppinen, Esko I., Lehtonen, Juha
Format: Article
Language:English
Subjects:
Bimetals
Carbon
Catalysts
Chirality
Copper
Iron
Nanoparticles
Single wall carbon nanotubes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A series of MgO-supported FeCu catalysts with different metal concentrations has been studied for synthesizing single-walled carbon nanotubes (SWCNTs). Spectroscopic characterization results have revealed that the concentrations of Fe and Cu are crucial for the purity of the produced SWCNTs, but have little effect on the SWCNT chirality distributions. The synergistic mechanisms of Fe and Cu in the catalysts were discussed and used for interpreting the growth results. Guided by the roles of Cu, an MgO-supported CoCu catalyst was also developed for low temperature growth of small diameter SWCNTs. All the results indicate that the Cu phase inhibits the sintering of the reduced metal particles and the active Fe or Co nanoparticles determine the chirality distribution of the SWCNTs.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2012.10.029