Production of carbon nanotube by ethylene decomposition over silica-coated metal catalysts

Toshiyuki Iguchi, Sakae Takenaka, Keizo Nakagawa, Yoshiki Orita, Hideki Matsune, Masahiro Kishida

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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 decomposition. Silicacoated Ni/SiO2 and Pt/carbon black also formed CNTs with uniform diameters, while CNFs and CNTs with various diameters were formed over Ni/SiO2 and Pt/carbon black without a silica coating. These results indicate that silica layers that envelop metal particles prevent sintering of the metal particles during ethylene decomposition. This results in the preferential formation of CNTs with a uniform diameter.

Original languageEnglish
Pages (from-to)563-570
Number of pages8
JournalTopics in Catalysis
Volume52
Issue number6-7
DOIs
Publication statusPublished - Jun 1 2009

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Carbon Nanotubes
Silicon Dioxide
Carbon nanotubes
Ethylene
Metals
Silica
Carbon nanofibers
Decomposition
Catalysts
Soot
Carbon black
Catalyst supports
Sintering
ethylene
Coatings

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Production of carbon nanotube by ethylene decomposition over silica-coated metal catalysts. / Iguchi, Toshiyuki; Takenaka, Sakae; Nakagawa, Keizo; Orita, Yoshiki; Matsune, Hideki; Kishida, Masahiro.

In: Topics in Catalysis, Vol. 52, No. 6-7, 01.06.2009, p. 563-570.

Research output: Contribution to journalArticle

Iguchi, Toshiyuki ; Takenaka, Sakae ; Nakagawa, Keizo ; Orita, Yoshiki ; Matsune, Hideki ; Kishida, Masahiro. / Production of carbon nanotube by ethylene decomposition over silica-coated metal catalysts. In: Topics in Catalysis. 2009 ; Vol. 52, No. 6-7. pp. 563-570.
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