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
Effect of polymer-coating on carbon blacks for Pt utilization efficiency of polymer electrolyte membrane fuel cells
Samindi Madhubha Jayawickrama,Samindi Madhubha Jayawickrama,Tsuyohiko Fujigaya,Tsuyohiko Fujigaya +3 more
TL;DR: In this article, the effect of polybenzimidazole (PBI) wrapping on carbon blacks (CBs) for the improvement of the Pt utilization efficiency in polymer electrolyte membrane fuel cells is investigated using CBs having a high surface area (HSA) and a low surface area(LSA).
Book ChapterDOI
CO-tolerant Catalysts
TL;DR: In this article, the authors discuss the most significant barriers that polymer electrolyte membrane fuel cells (PEMFCs) must overcome to achieve complete commercialization, including the choice of fuel (gasoline, methanol, or hydrogen), efficient fuel processing, and development of anode electrocatalysts tolerant to CO at levels of 50 ppm (with a noble metal loading of 0.1 mg cm-2 or less).
Journal ArticleDOI
Poly(3-hydroxyalkanoate)-grafted carbon nanotube nanofillers as reinforcing agent for PHAs-based electrospun mats
Carine Mangeon,Samia Mahouche-Chergui,D.L. Versace,Mohamed Guerrouache,Benjamin Carbonnier,Valérie Langlois,Estelle Renard +6 more
TL;DR: In this article, poly(3-hydroxyalkanoate)s, PHAs, have been covalently grafted onto the surface of multi-walled carbon nanotubes, MWCNTs, providing nanofillers (MWCNT-graft-PHAs) with enhanced compatibility and reinforcement effect towards PHAs.
Journal ArticleDOI
Eutectic mixture-functionalized carbon nanomaterials for selective amperometric detection of nitrite using modified glassy carbon electrode
TL;DR: Choline chloride-urea (CU) was used to functionalize two types of carbon nanomaterials (CNMs); multiwall carbon nanotube (MWCNT) and graphene (Gr) as discussed by the authors.
Journal ArticleDOI
Study of the activity and backscattered electron image of Pt/CNTs prepared by the polyol process for flue gas purification
TL;DR: In this article, the Pt/CNTs catalyst showed a good redox reaction for NO removal, and toluene is a better reductant than CO. Based on the backscattered electron image, platinum dispersion on carbon supports can be observed clearly.
References
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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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