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
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Book
Designing and building fuel cells
TL;DR: This chapter discusses Fuel Cell Characterization, which describes the design requirements and parameters of a fuel cell system, and the design specifications, which describe the products that will be produced.
Journal ArticleDOI
An overview of unsolved deficiencies of direct methanol fuel cell technology: factors and parameters affecting its widespread use
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N-doped graphene/carbon composite as non-precious metal electrocatalyst for oxygen reduction reaction
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Construction of Pd-based nanocatalysts for fuel cells: opportunities and challenges
TL;DR: In this paper, a review article provides an overview of recent advances in Pd-based electrocatalysts with a well-defined structure that can be applied for alcohol oxidation and oxygen reduction in an alkaline medium in direct alcohol fuel cells.
Journal ArticleDOI
Metal-free and electrocatalytically active nitrogen-doped carbon nanotubes synthesized by coating with polyaniline
Chen Jin,Tharamani Chikka Nagaiah,Wei Xia,Bernd Spliethoff,Shanshan Wang,Michael Bron,Wolfgang Schuhmann,Martin Muhler +7 more
TL;DR: The sample synthesized from 30 wt% MnO2 followed by carbonization at 850 degrees C showed the best electrochemical performance indicating efficient nitrogen doping, and was used as catalysts for the oxygen reduction reaction.
References
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TL;DR: A general strategy for the synthesis of highly ordered, rigid arrays of nanoporous carbon having uniform but tunable diameters is described, which gives rise to promising electrocatalytic activity for oxygen reduction and could prove to be practically relevant for fuel-cell technologies.
Journal ArticleDOI
Large-Scale Synthesis of Aligned Carbon Nanotubes
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Carbon nanotubule membranes for electrochemical energy storage and production
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