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
Interconnected nanoparticle-stacked platinum-based nanosheets as active cathode electrocatalysts for passive direct methanol fuel cells
TL;DR: In this article, a two-dimensional Pt and porous PtNi alloy nanosheets are synthesized via galvanic replacement of Ni nanobelts for passive direct methanol fuel cells (DMFCs).
Journal ArticleDOI
Preparation of highly crystalline graphitic nanocarbon for the electro-oxidation of methanol
TL;DR: In this paper, high crystalline graphitic nanocarbons (GNC) have been prepared by the wet-air treatment of hydrothermally derived graphitic porous carbon.
Journal ArticleDOI
Nanocomposites of HDPE/LDPE/Nylon 6 reinforced with MWCNT, Kenaf fiber, nano Mg(OH)2, and PEPA with enhanced mechanical, thermal, and flammability characteristics
M. Ameen Khan,R. R. N. Sailaja +1 more
TL;DR: In this article, the effect of combination of magnesium hydroxide (Mg(OH)2) and Multiwall Carbon Nanotubes (MWCNT) on the thermal, flammable, and mechanical properties of ternary blends was investigated.
Book ChapterDOI
CHAPTER 19 – Solvent and Simple Ion-Stabilized Metal Nanoclusters: Chemical Synthesis and Application
Yuan Wang,Xiaodong Wang +1 more
Integrated Electrocatalytic Processing of Levulinicacid and Formic Acid to Produce Biofuelintermediate Valeric Acid
TL;DR: In this article, an integrated electrocatalytic processing of simulated acid-catalyzed cellulose hydrolysis downstream (levulinic acid + formic acid) to the biofuel intermediate valeric acid (VA) was reported.
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