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Lithium interaction with catalytic carbon nanotubes under high-pressure conditions was studied. A large amount of Li (2Li/C) reacted with the carbon nanotubes forming an intercalation compound (I c ∼4.1 ) which follows from X-ray diffraction and IR spectroscopy data. We cannot exclude also the possibility of insertion of a part of Li into the channel of the nanotubes.
Carbon nanotubes were prepared by thermal decomposition of acetylene over silica-supported cobalt catalysts. Subsequent chemical treatments with concentrated hydrofluoric acid and dilute nitric acid, respectively, eliminated the silica substrate and the remaining catalyst. The complete removal of cobalt was very difficult due to encapsulation of part of it in the shells, but a graphitization at...
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