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
Activity Modulated Low Platium Content Oxygen Reduction Electrocatalysts Prepared by Inducing Nano-Order Dislocations on Carbon Nanofiber through N2-Doping
TL;DR: In this paper, surface unsaturation developed during small order buckling of graphene interlayer upon doping iron nitride (i.e., FeNx) moieties in carbon nanofiber can be utilized as a very efficient mode of surface activation to establish fine distribution of Pt nanoparticles with 10 wt %.
Journal ArticleDOI
Functionalization of multi-walled carbon nanotubes with pramipexole for immobilization of palladium nanoparticles and investigation of catalytic activity in the Sonogashira coupling reaction
Sahar Abbasi,Malak Hekmati +1 more
TL;DR: Pramipexole drug was attached to the surface of multi-walled carbon nanotubes (MWCNTs) by reaction of acylated carbon nanotsubes with pramipexoles for the first time as mentioned in this paper.
Journal ArticleDOI
Colloid-imprinted carbon with tailored nanostructure as an unique anode electrocatalyst support for formic acid oxidation
TL;DR: Colloid-imprinted carbon (CIC) with tailored mesopore size of ca. 22nm and highly developed interconnected nanoporous structure was synthesized and explored for the first time as an anode catalyst support in direct formic acid fuel cell.
Journal ArticleDOI
Competitive paths for methanol decomposition on ruthenium: a DFT study
Ana S. Moura,Ana S. Moura,José L. C. Fajín,Ana S.S. Pinto,Marcos Mandado,M. Natália D. S. Cordeiro +5 more
TL;DR: In this paper, the mechanism of methanol decomposition on ruthenium surfaces was investigated using density functional theory and a periodic supercell approach, and the possible pathways, involving either initial C-H, C-O or O-H scission, were defined from experimental evidence regarding the methanoil decomposition.
Book ChapterDOI
Carbon-Based Nanostructured Materials for Energy and Environmental Remediation Applications
TL;DR: In this article, advances in the fabrication of novel nanosized materials for treatment of contaminants and production of energy are described, and research trends and outlines of future opportunities in environmental and energy applications are briefly discussed.
References
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Journal ArticleDOI
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