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Title: Fabrication of CNTs with controlled diameters and their applications as electrocatalyst supports for DMFC
Authors: Lo, A.-Y.
Yu, N.
Huang, S.-J.
Hung, C.-T.
Liu, S.-H.
Lei, Z. 
Kuo, C.-T.
Liu, S.-B.
Keywords: Carbon nanotube
Chemical vapor deposition
Direct methanol fuel cell
Hexagonal mesoporous silica
Templating synthesis
Issue Date: Mar-2011
Citation: Lo, A.-Y., Yu, N., Huang, S.-J., Hung, C.-T., Liu, S.-H., Lei, Z., Kuo, C.-T., Liu, S.-B. (2011-03). Fabrication of CNTs with controlled diameters and their applications as electrocatalyst supports for DMFC. Diamond and Related Materials 20 (3) : 343-350. ScholarBank@NUS Repository.
Abstract: A facile synthesis procedure based on chemical vapor deposition (CVD) process has been developed to fabricate carbon nanotubes (CNTs) with controlled diameters and high yields utilizing Fe-containing ordered hexagonal mesoporous silicas (HMSs) such as MCM-41 and SBA-15 having varied pore sizes as the catalysts as well as the templates. It is found that unlike Fe/HMS catalysts prepared by co-precipitation method, samples prepared by the impregnation method gave rise to multi-wall CNTs with uniform diameters, which were largely dictated by the pore size of the Fe/HMS catalysts. Among these uniform MWCNTs, sample with a larger diameter (≥ 8 nm) was found to be more favorable as support for Pt catalyst, leading to a homogeneous dispersion of metal nanoparticles. Consequently, the Pt/CNT electrocatalysts so prepared gave rise to superior methanol oxidation activities as well as tolerances for CO poisoning compared to Pt supported on commercial single-wall CNT (Pt/SWCNT) and XC-72 activated carbon (Pt/XC-72) having a similar metal loading. © 2011 Elsevier B.V. All rights reserved.
Source Title: Diamond and Related Materials
ISSN: 09259635
DOI: 10.1016/j.diamond.2011.01.002
Appears in Collections:Staff Publications

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