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Formation of carbon nanofibers (CNFs) and carbon nanotubes (CNTs) through the decomposition of ethylene at 973 K was achieved using various metal catalysts covered with silica layers. CNFs of various diameters were formed by ethylene decomposition over a Co metal catalyst supported on the outer surface of the silica. In contrast, silica-coated Co catalysts formed CNTs with uniform diameters by ethylene...
Methane decomposition into hydrogen and carbon nanofibers was carried out over Ni/SiO 2 . The catalytic activity of Ni/SiO 2 decreased with time on stream and finally the catalyst was deactivated completely. The initial catalytic activity and the yields of hydrogen and carbon nanofibers until complete deactivation of the catalysts depended strongly on the loading amount of Ni. The...
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