Journal ArticleDOI
Preparation and Characterization of Multiwalled Carbon Nanotube-Supported Platinum for Cathode Catalysts of Direct Methanol Fuel Cells
TLDR
In this paper, a multiwalled carbon nanotube-supported Pt (Pt/MWNT) nanocomposites were prepared by both the aqueous solution reduction of a Pt salt (HCHO reduction) and the reduction of an ion salt in ethylene glycol solution.Abstract:
Multiwalled carbon nanotube-supported Pt (Pt/MWNT) nanocomposites were prepared by both the aqueous solution reduction of a Pt salt (HCHO reduction) and the reduction of a Pt ion salt in ethylene glycol solution. For comparison, a Pt/XC-72 nanocomposite was also prepared by the EG method. The Pt/MWNT catalyst prepared by the EG method has a high and homogeneous dispersion of spherical Pt metal particles with a narrow particle-size distribution. TEM images show that the Pt particle size is in the range of 2-5 nm with a peak at 2.6 nm, which is consistent with 2.5 nm obtained from the XRD broadening calculation. Surface chemical modifications of MWNTs and water content in EG solvent are found to be the key factors in depositing Pt particles on MWNTs. In the case of the direct methanol fuel cell (DMFC) test, the Pt/MWNT catalyst prepared by EG reduction is slightly superior to the catalyst prepared by aqueous reduction and displays significantly higher performance than the Pt/XC-72 catalyst. These differences in catalytic performance between the MWNT-supported or the carbon black XC-72-supported catalysts are attributed to a greater dispersion of the supported Pt particles when the EG method is used, in contrast to aqueous HCHO reduction and to possible unique structural and higher electrical properties when contrasting MWNTs to carbon black XC-72 as a support.read more
Citations
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Journal ArticleDOI
Formation of COx-Free H2 and Cup-Stacked Carbon Nanotubes over Nano-Ni Dispersed Single Wall Carbon Nanohorns
Shuwen Wang,Tsutomu Itoh,Toshihiko Fujimori,Mateus Monteiro de Castro,Ana Silvestre-Albero,Francisco Rodríguez-Reinoso,Tomonori Ohba,Hirofumi Kanoh,Morinobu Endo,Katsumi Kaneko,Katsumi Kaneko +10 more
TL;DR: SWCNH was superior to Al(2)O(3) as the catalyst support of Ni for the CH(4) decomposition reaction.
Journal ArticleDOI
Performance Comparison of Pt1–xPdx/Carbon Nanotubes Catalysts in Both Electrodes of Polymer Electrolyte Membrane Fuel Cells
TL;DR: In this paper, the catalytic activity of Pt1-xPdx nanoparticles supported on carbon nanotubes (CNTs) was evaluated for both the hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs) using a colloidal method.
Journal ArticleDOI
Double-Walled Carbon Nanotubes as Catalyst Support in Direct Methanol Fuel Cells
TL;DR: In this article, double-walled carbon nanotubes (DWCNTs) with a large specific surface area, good crystallization, and netlike structure were synthesized by chemical vapor deposition.
Journal ArticleDOI
Post-γ -irradiation effects on structural, optical and morphological properties of chemical vapour deposited MWCNTs
TL;DR: In this paper, the effect of γ-irradiation with 1.25-MeV average energy (Co-60) was studied on the structural, optical and morphological properties of chemical vapour deposited MWCNTs at 10-60kGy dose.
Journal ArticleDOI
Electrocatalytic hydrogenation of cinnamaldehyde in a PEM cell: The role of sodium hydroxide and platinum loading
TL;DR: In this paper, the influence of the cathode Pt loading on the performance of the XC-72 supported Pt catalyst was evaluated in order to improve the electrocatalytic performance of a PEM cell.
References
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