Substrate-support interactions in metal-catalyzed carbon nanofiber growth

Randy Lee Vander Wal, Thomas M. Ticich, Valerie E. Curtis

Research output: Contribution to journalArticle

154 Citations (Scopus)

Abstract

Catalyst-support interactions are critical in CVD processes for nanotube synthesis. In this article, the relative contributions of the catalyst electronic structure and support chemical composition are evaluated with Cu, Fe and Ni as catalysts and Al2O3, CaO, SiO2 and TiO2 as support media. The impact of the interaction is judged qualitatively based on nanotube growth and structure. Results are interpreted in terms of electron charge donation to the metal nanoparticle enabled by either strong-metal support interaction (SMSI) or by interaction of the catalyst nanoparticle with exposed Lewis base sites on the support material. The role of the physical structure of the support medium is explored by comparison of nanotubes grown upon powdered and fumed phases of the support oxides. Carbon nanotubes catalyzed by metal nanoparticles generated in-situ or preformed illustrate the advantage of presynthesized particles for size uniformity with attendant greatly lessened dependence upon catalyst preparation conditions. Catalyst retention and dispersion under rapid heating conditions is evaluated for the same support-catalyst systems listed above as a preliminary test for flame synthesis. Results show that SMSI interaction is critical to using the supported catalyst method in a flame.

Original languageEnglish (US)
Pages (from-to)2277-2289
Number of pages13
JournalCarbon
Volume39
Issue number15
DOIs
StatePublished - Nov 20 2001

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Carbon nanofibers
Catalyst supports
Metals
Catalysts
Nanotubes
Substrates
Metal nanoparticles
Flame synthesis
Lewis Bases
Carbon Nanotubes
Oxides
Electronic structure
Chemical vapor deposition
Carbon nanotubes
Nanoparticles
Heating
Electrons
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

Vander Wal, Randy Lee ; Ticich, Thomas M. ; Curtis, Valerie E. / Substrate-support interactions in metal-catalyzed carbon nanofiber growth. In: Carbon. 2001 ; Vol. 39, No. 15. pp. 2277-2289.
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Substrate-support interactions in metal-catalyzed carbon nanofiber growth. / Vander Wal, Randy Lee; Ticich, Thomas M.; Curtis, Valerie E.

In: Carbon, Vol. 39, No. 15, 20.11.2001, p. 2277-2289.

Research output: Contribution to journalArticle

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