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The effect of reduction temperature on Co-Mo/Al2O3 catalysts for carbon nanotubes formation

Paper ID Volume ID Publish Year Pages File Format Full-Text
43526 45975 2007 7 PDF Available
Title
The effect of reduction temperature on Co-Mo/Al2O3 catalysts for carbon nanotubes formation
Abstract

Catalyst reduction temperature was observed to affect the yield and diameter uniformity of carbon nanotubes (CNTs) produced on Co-Mo/Al2O3 catalysts. The results show that on the whole, the reduced catalysts gave higher carbon yield. The CNTs obtained from the unreduced catalyst and the catalysts reduced at 400, 550, and 700 °C had diameters of 9.0 ± 1.4, 11.0 ± 1.8, 11.2 ± 1.8, and 12.1 ± 2.7 nm, respectively, showing that an increase in catalyst reduction temperature produced a slightly larger average diameter and wider diameter distribution. Raman spectra further elucidate that better-graphitized CNTs were produced on the catalysts reduced with increasing reduction temperatures.

Graphical abstractCatalyst reduction temperature was observed to affect the yield and diameter uniformity of carbon nanotubes (CNTs) produced on Co-Mo/Al2O3 catalysts. The results show that on the whole, the reduced catalysts gave higher carbon yield. An increase in catalyst reduction temperature produced a slightly larger average diameter and wider diameter distribution. Raman spectra further elucidate that better-graphitized CNTs were produced on the catalysts reduced with increasing reduction temperatures. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Carbon nanotubes; Methane decomposition; Catalyst reduction; Co-Mo/Al2O3 catalysts
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The effect of reduction temperature on Co-Mo/Al2O3 catalysts for carbon nanotubes formation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 326, Issue 2, 15 July 2007, Pages 173–179
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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