Experimental study of the influence of hydrogenation on synthesis of carbon nanostructures in a reactor with activated hydrogen |
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Authors: | L A Apresyan D V Vlasov T V Vlasova and A A Klimanov |
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Institution: | 1.Prokhorov General Physics Institute,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The role of backward pyrolysis of carbon during hydrogenation of unstructured carbon black and nanotube growth in a reactor
with hydrogen activated by diffusion through a heated metallic wall is studied. If the wall is heated nonuniformly, the amorphous
unstructured carbon deposit “climbs” in the course of hydrogenation by active hydrogen and deposits again when falling on
the heated metal surface, self-organizing into more ordered nanofibers and nanotubes as a result of forward pyrolysis. It
is shown that this effect can be used for raising the concentration of carbon nanotubes growing on catalyst particles in the
deposited layer. |
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