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

Siang Piao Chai; Sharif Hussein Sharif Zein; Abdul Rahman Mohamed

doi:10.1016/j.apcata.2007.04.020

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

Siang Piao Chai, Sharif Hussein Sharif Zein, Abdul Rahman Mohamed

Research output: Contribution to journal › Article › peer-review

69 Citations (Scopus)

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.

Original language	English
Pages (from-to)	173-179
Number of pages	7
Journal	Applied Catalysis A: General
Volume	326
Issue number	2
DOIs	https://doi.org/10.1016/j.apcata.2007.04.020
Publication status	Published - Jul 15 2007
Externally published	Yes

Bibliographical note

Funding Information:
The authors gratefully acknowledge the financial support provided by the Academy of Sciences Malaysia under Scientific Advancement Grant Allocation (SAGA) (project: A/C No. 6053001).

ASJC Scopus Subject Areas

Catalysis
Process Chemistry and Technology

Access to Document

10.1016/j.apcata.2007.04.020

Cite this

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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.",

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