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Title: The synergistic effect in the Fe-Co bimetallic catalyst system for the growth of carbon nanotube forests

We report the growth of multi-walled carbon nanotube forests employing an active-active bimetallic Fe-Co catalyst. Using this catalyst system, we observe a synergistic effect by which—in comparison to pure Fe or Co—the height of the forests increases significantly. The homogeneity in the as-grown nanotubes is also improved. By both energy dispersive spectroscopy and in-situ x-ray photoelectron spectroscopy, we show that the catalyst particles consist of Fe and Co, and this dramatically increases the growth rate of the tubes. Bimetallic catalysts are thus potentially useful for synthesising nanotube forests more efficiently.
Authors:
; ; ; ;  [1] ; ;  [2] ; ;  [3] ;  [4]
  1. Department of Engineering, University of Cambridge, Cambridge CB3 0FA (United Kingdom)
  2. Istituto Officina dei Materiali-CNR, Laboratorio TASC, Trieste I-34149 (Italy)
  3. Johnson Matthey Technology Centre, Sonning Common RG4 9NH (United Kingdom)
  4. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS (United Kingdom)
Publication Date:
OSTI Identifier:
22413002
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CARBON NANOTUBES; CATALYSTS; COBALT; COMPARATIVE EVALUATIONS; CRYSTAL GROWTH; IRON; PARTICLES; POTENTIALS; SYNTHESIS; X-RAY PHOTOELECTRON SPECTROSCOPY