期刊
APPLIED SURFACE SCIENCE
卷 242, 期 1-2, 页码 192-198出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2004.08.014
关键词
catalyst; nanotube; Ni/Cr hydrotalcite
Carbon nanotubes have been prepared by the catalytic decomposition of acetylene over Ni/Cr hydrotalcite-type anionic clay catalyst. Ni/Cr hydrotalcite-type anionic clay precursors have been prepared by co-precipitation technique. The role of stability of Ni nanoparticles obtained in situ from the decomposition of the catalyst oil the growth of MWNTs is discussed. The as-synthesized and purified carbon nanotubes are characterized by thermogravimetry, IR spectroscopy, X-ray diffraction, BET analysis, scanning electron microscopy, transmission electron microscopy and Raman spectroscopy measurements. The hydrogen adsorption capacity of as-synthesized and purified multiwalled carbon nanotubes at 298 K has been obtained using a high-pressure hydrogen adsorption set-up and the results are discussed. (C) 2004 Elsevier B.V. All rights reserved.
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