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
Effect of gradual reduction of graphene oxide on the CO tolerance of supported platinum nanoparticles
I. Abidat,Cláudia Morais,Stéphane Pronier,Nadia Guignard,J.D. Comparot,Christine Canaff,Teko W. Napporn,Aurélien Habrioux,Anne-Sophie Mamede,Jean-François Lamonier,Kouakou Boniface Kokoh +10 more
TL;DR: In this article, the reduction extent of the carbon-based materials affects the electron density on Pt thus engendering modifications in the adsorption strength of CO molecule, and it was shown that reduction processes allow removing oxygenated functional groups.
Journal ArticleDOI
Excellent Durability of Substoichiometric Titanium Oxide As a Catalyst Support for Pd in Alkaline Direct Ethanol Fuel Cells
TL;DR: In this article, the performance of the three catalysts, Pd/TinO2n-1 showed the best activity and stability for ethanol electrooxidation in alkaline media.
Journal ArticleDOI
Plasma deposition of catalytic thin films: Experiments, applications, molecular modeling
TL;DR: In this paper, a review of plasma deposition of catalytic thin films is presented in view of highlighting some interesting features, such as magnetron sputtering, plasma enhanced chemical vapor, and metalorganic chemical vapor.
Journal ArticleDOI
Facile Fabrication of Pt Nanoparticles on 1-Pyrenamine Functionalized Graphene Nanosheets for Methanol Electrooxidation
TL;DR: In this paper, noncovalent functionalized graphene nanosheets are prepared through solvent-exfoliation expanded graphite with the aid of supercritical (SC) CO2 and 1-pyrenamine (PA).
Patent
Organically complexed nanocatalysts for improving combustion properties of fuels and fuel compositions incorporating such catalysts
TL;DR: In this article, a mixture of nanocatalyst particles made using a dispersing agent is applied to a solid fuel substrate to reduce the amount of CO, hydrocarbons and soot produced by the fuel during combustion.
References
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Journal ArticleDOI
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