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
Improved catalytic activity in methanol electro-oxidation over the nickel form of aluminum-rich beta-SDS zeolite modified electrode
TL;DR: In this paper, a glass carbon electrode was modified by the nickel form of an aluminum-rich beta-SDS zeolite synthesized from an organotemplate-free and seed-directed route.
Journal ArticleDOI
In situ PEI and formic acid directed formation of Pt NPs/MWNTs hybrid material with excellent electrocatalytic activity.
TL;DR: The cationic polyelectrolyte PEI not only favored the homogenous dispersion of carbon nanotubes in water, but also provided sites for the adsorption of anionic ions PtCl(4)(2-) on the MWNTs' sidewalls.
Patent
Tobacco catalyst and methods for reducing the amount of undesirable small molecules in tobacco smoke
TL;DR: In this article, the authors have disclosed that tobacco products and articles that include a nanoparticle catalyst include a dispersing agent that inhibits the deactivation of the nanoparticles, which is capable of degrading undesirable small molecules in tobacco smoke.
Journal ArticleDOI
Phase-transfer synthesis of amorphous palladium nanoparticle-functionalized 3D helical carbon nanofibers and its highly catalytic performance towards hydrazine oxidation
TL;DR: Amorphous palladium nanoparticles functionalized helical carbon nanofibers (ApPd-HCNFs) were synthesized using a phase-transfer method.
Patent
Low temperature preparation of supported nanoparticle catalysts having increased dispersion
Clementine Reyes,Bing Zhou +1 more
TL;DR: In this article, the anchoring agent molecules include at least two functional groups, one functional group is selected to bond with the catalyst atoms and the other functional group was selected to connect the anchor with the support material.
References
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