Abstract
The catalyzed growth of ordered filamentous carbon from a hydrogen/ethylene feedstock has been studied using Ni/SiO 2 doped with LiBr. The introduction of the alkali halide resulted in a significant increase in carbon yield while the catalytically generated carbon exhibited a higher degree of structural order. The latter has been determined from high-resolution transmission electron microscopy (HRTEM) and temperature programmed oxidation (TPO) analyses. Carbon yield and structural enhancement is linked to a restructuring of the active sites that facilitates a destructive chemisorption of ethylene and the dissolution and precipitation of carbon in an ordered fashion.
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