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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Dissertation
Development of Catalysts and Catalyst Supports for Polymer Electrolyte Fuel Cells
TL;DR: In this article, a graphitic carbon nitride (GCN) was used as a low-cost anode catalyst for polymer electrolyte membrane fuel cells (PEMFCs).
Book ChapterDOI
Modeling the Gas Diffusion Layers
TL;DR: In this article, the theory and commonly used equations for modeling the fuel cell gas diffusion layer (GDL) are described, and the basics and modes of transport of modeling porous media, and types of models are discussed.
Journal ArticleDOI
Carbon Nanotube Fibers Prepared by Activating Deactivated Iron Particles in Floating Catalyst Chemical Vapor Deposition Tail Gas
Yancai Zhang,Shuaishuai Han +1 more
TL;DR: In this paper, the deactivated iron nanoparticles in tail gas can be successfully activated in a double furnace system under certain conditions, and the double-walled carbon nanotubes (DWNTs) were successfully prepared using the activated iron particles by adding the precursor without the catalyst.
Book ChapterDOI
Electrospun Nanofibers for Low-Temperature Proton Exchange Membrane Fuel Cells
Surya Subianto,Stefano Giancola,Giorgio Ercolano,Yannick Nabil,Deborah J. Jones,Jacques Rozière,Sara Cavaliere +6 more
Journal ArticleDOI
Synthesis and Property of Carbon Nanotube-Supported Pd and Pt Nanoparticles
Hyung-Kun Kim,R. Y. Lee +1 more
TL;DR: In this article, Pd and Pt nanoparticles supported on HNO3-treated CNT were prepared by microwave-assisted heating of the polyol process using PdCl2 and H2PtCl6•6H2O precursors, respectively, and were then characterized by SEM, TEM, and Raman.
References
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
Large-Scale Synthesis of Aligned Carbon Nanotubes
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Journal ArticleDOI
Carbon nanotubule membranes for electrochemical energy storage and production
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