Mechanism study of floating catalyst CVD synthesis of SWCNTs

Giorgio Lanzani*, Toma Susi, Paola Ayala, Tao Jiang, Albert G. Nasibulin, Thomas Bligaard, Thomas Pichler, Kari Laasonen, Esko I. Kauppinen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Catalysis over metal nanoparticles is essential for carbon nanotube growth. Thus it is very important to understand the carbon chemistry on nanometer size metal particles. First-principles electronic-structure calculations have been used to investigate carbon monoxide (CO) disproportionation on an isolated Fe55 cluster. After CO dissociation, O atoms remain on the surface while C atoms move into the cluster, presumably as the initial step towards carbide formation. The lowest CO dissociation barrier found on the cluster (0.63 eV) is lower than on most studied Fe surfaces. The dissociation occurs on a vertex between the facets. A possible path for CO2 formation was also identified with a lowest reaction barrier of 1.04 eV. Proposed carbon monoxide disproportionation mechanism (Fe, brown; C, grey; O, red). © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
JournalIPPS physica status solidi (b)
Volume247
Issue number11-12
Pages (from-to)2708-2712
Number of pages5
ISSN0370-1972
DOIs
Publication statusPublished - 2010

Keywords

  • Chemical vapour deposition
  • Density functional theory
  • Mechanism
  • Nanoparticle
  • Synthesis

Cite this

Lanzani, G., Susi, T., Ayala, P., Jiang, T., Nasibulin, A. G., Bligaard, T., Pichler, T., Laasonen, K., & Kauppinen, E. I. (2010). Mechanism study of floating catalyst CVD synthesis of SWCNTs. IPPS physica status solidi (b), 247(11-12), 2708-2712. https://doi.org/10.1002/pssb.201000226