Formation of carbon nanotubes from the carbon monoxide disproportionation reaction over Co/Al2O3 and Co/SiO2 catalysts |
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Authors: | A. Thaib G.A. Martin P. Pinheiro M.C. Schouler P. Gadelle |
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Affiliation: | (1) Institut de Recherche sur la Catalyse, 2, Avenue Albert Einstein, 69626 Villeurbanne Cedex, France;(2) Laboratoire de Thermodynamique et de Physico‐Chimie Métallurgiques, CNRS‐INPG‐UJF, Ecole Nationale Supérieure d'Electrochimie et d'Electrométallurgie de Grenoble, BP 75, 38402 Saint‐Martin d'Hères, France |
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Abstract: | The ammonia method has been successfully used for preparing thermostable and well dispersed alumina‐supported catalysts with a surface average size of cobalt particle D s= 5.7 nm. The disproportionation reaction of CO over this Co/Al2O3 catalyst and a similar Co/SiO2 catalyst leads to the formation of carbon nanotubes demonstrating the same morphology. The amount of nanotubes over Co/Al2O3, however, is much larger than that obtained over Co/SiO2, because of a faster ageing in the latter solid. Similar support effects have already been reported for other catalytic reactions involving carbon oxides. This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | carbon nanotubes CO dismutation Co/SiO2 catalyst Co/Al2O3 catalyst support effect |
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