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Production of Carbon Nanotube by Ethylene Decomposition over Silica-Coated Metal Catalysts.
- Source :
-
Topics in Catalysis . Jun2009, Vol. 52 Issue 6/7, p563-570. 8p. 7 Diagrams, 1 Graph. - Publication Year :
- 2009
-
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. Silica-coated 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10225528
- Volume :
- 52
- Issue :
- 6/7
- Database :
- Academic Search Index
- Journal :
- Topics in Catalysis
- Publication Type :
- Academic Journal
- Accession number :
- 39980986
- Full Text :
- https://doi.org/10.1007/s11244-009-9191-7