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
Bulk synthesis of green carbon nanomaterials from Desmostachya bipinnata for the development of functional polyurethane hybrid coatings
TL;DR: In this paper, an easy synthesis of carbon nanomaterials from the grass Desmostachya bipinnata was reported, where fresh grass was collected and dried completely under the sun and was subjected to complete incineration in atmospheric oxygen.
Journal ArticleDOI
Design and mechanical characterization of a novel carbon-based hybrid foam: A molecular dynamics study
Unal Degirmenci,Mesut Kirca +1 more
TL;DR: In this article, a new hybrid nanostructure that will be named as graphene nanoribbon-fullerene (GNR-F) network is introduced by providing its tensile and compressive mechanical characteristics through molecular dynamics simulations.
Journal ArticleDOI
Reducing the Cost and Preserving the Reactivity in Noble-Metal-Based Catalysts: Oxidation of CO by Pt and Al-Pt Alloy Clusters Supported on Graphene.
TL;DR: The oxidation mechanisms of CO to CO2 on graphene-supported Pt and Pt-Al alloy clusters are elucidated by reactive dynamical simulations and provides a generalizable strategy for the design of efficient, yet sustainable, Pt-based catalysts at reduced cost.
Journal ArticleDOI
Microwave-assisted poly(glycidyl methacrylate)-functionalized multiwall carbon nanotubes with a ‘tendrillar’ nanofibrous polyaniline wrapping and their interaction at bio-interface
Sujata Pramanik,Rocktotpal Konwarh,Ramesh C. Deka,Lipika Aidew,Nilakshi Barua,Alak Kumar Buragohain,Dambarudhar Mohanta,Niranjan Karak +7 more
TL;DR: In this paper, multiwall carbon nanotubes (MWCNTs) were activated by microwave irradiation and covalently functionalized with poly(glycidyl methacrylate) (PGMA) through free radical polymerization using "fishing process" when the propagating polymer radicals were attached onto the graphitic surface of the nanotube.
Journal ArticleDOI
Hybrid gas sensor based on platinum nanoparticles/poly(methyl methacrylate)-coated single-walled carbon nanotubes for dichloromethane detection with a high response magnitude
Worawut Muangrat,Visittapong Yordsri,Rungroj Maolanon,Sirapat Pratontep,Supanit Porntheeraphat,Winadda Wongwiriyapan +5 more
TL;DR: In this article, a dichloromethane (DCM) sensor with a high response magnitude was successfully fabricated using the integration of single-walled carbon nanotubes (SWNTs), poly(methyl methacrylate) (PMMA) and platinum nanoparticles (Pt NPs).
References
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Helical microtubules of graphitic carbon
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Ordered nanoporous arrays of carbon supporting high dispersions of platinum nanoparticles
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.
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Large-Scale Synthesis of Aligned Carbon Nanotubes
TL;DR: Large-scale synthesis of aligned carbon nanotubes was achieved by using a method based on chemical vapor deposition catalyzed by iron nanoparticles embedded in mesoporous silica to form an aligned array of isolated tubes with spacings between the tubes.
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Carbon nanotubule membranes for electrochemical energy storage and production
TL;DR: In this paper, template-synthesized carbon tubules are fabricated as free-standing nanoporous carbon membranes, and a narrower, highly ordered graphitic carbon nanotubes can be prepared within the membrane's tubules.