Decomposition of Carbon-Containing Compounds on Solid Catalysts for Single-Walled Nanotube Production

Authors: Resasco, Daniel E.; Herrera, José E.; Balzano, Leandro

Source: Journal of Nanoscience and Nanotechnology, Volume 4, Number 4, April 2004 , pp. 398-407(10)

Publisher: American Scientific Publishers

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Abstract:

Different catalyst formulations and reaction conditions have been used to test the validity of a hypothesis that tries to elucidate the mechanism of single-walled nanotube (SWNT) formation by CO disproportionation over a highly selective cobalt-molybdenum catalyst. This model proposed an intrinsic dependence between the selectivity of the catalysts toward SWNT and the stabilization of Co species in a nonmetallic state, which in turn results from an interaction with Mo. The series of tests performed to examine this model include the doping of this highly selective catalyst with sodium, the substitution of molybdenum by tungsten in the original catalyst formulation, the variation on reaction temperature, and the introduction of hydrogen in the gas feedstock. All these modifications were carried out to modify the growth conditions in which the SWNTs are formed. The results are consistent with the hypothesis proposed by the authors.

Keywords: COMO CATALYST; COW CATALYST; NA DOPING; OPTICAL ABSORPTION; RAMAN; SINGLE WALLED CARBON NANOTUBE; TEM

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2004.064

Publication date: April 1, 2004

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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