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
Surface dealloyed PtCo nanoparticles supported on carbon nanotube: facile synthesis and promising application for anion exchange membrane direct crude glycerol fuel cell
Ji Qi,Le Xin,Zhiyong Zhang,Kai Sun,Haiying He,Fang Wang,David J. Chadderdon,Yang Qiu,Changhai Liang,Wenzhen Li +9 more
TL;DR: In this paper, carbon nanotube-supported surface dealloyed PtCo nanoparticles are synthesized as highly active glycerol oxidation catalysts via a facile surfactant and thermo free process.
Journal ArticleDOI
Green synthesis of a Pt nanoparticle/polyoxometalate/carbon nanotube tri-component hybrid and its activity in the electrocatalysis of methanol oxidation
TL;DR: In this article, an easy, room temperature and environmentally friendly synthesis of Pt nanoparticle-decorated carbon nanotubes (CNTs) is reported, where polyoxometalates (POMs) were used to serve as both reducing and bridging molecules.
Journal ArticleDOI
Gamma radiation induced distribution of gold nanoparticles into carbon nanotube-polyaniline composite
Kwang-Pill Lee,Anantha Iyengar Gopalan,Anantha Iyengar Gopalan,Padmanabhan Santhosh,Se Hee Lee,Young Chang Nho +5 more
TL;DR: In this paper, a one-pot synthesis using γ-radiation as source for initiation of polymerization and generation of Au nanoparticles was described, and the nanocomposites were characterized for the structure, morphology and electronic properties through X-ray diffraction analysis (XRD), Fourier transform infra red spectroscopy (FT-IR), field emission transmission microscopy (FETEM) and UV-visible spectroscope.
Journal ArticleDOI
Multiamino-functionalized carbon nanotubes and their applications in loading quantum dots and magnetic nanoparticles
TL;DR: In this article, two strategies were employed to synthesize amino-functionalized multiwalled carbon nanotubes (MWNTs) by growing poly(2-dimethylaminoethyl methacrylate) (PDMAEMA) from the surfaces of MWNTs by in situ atom transfer radical polymerization (ATRP).
Journal ArticleDOI
Multiwalled Carbon Nanotube@Reduced Graphene Oxide Nanoribbon as the Counter Electrode for Dye-Sensitized Solar Cells
Min-Hsin Yeh,Lu-Yin Lin,Chia-Liang Sun,Yow-An Leu,Jin-Ting Tsai,Chen-Yu Yeh,R. Vittal,Kuo-Chuan Ho +7 more
TL;DR: In this article, a new core-shell heterostructure of multiwalled carbon nanotube@reduced graphene oxide nanoribbon (MWCNT@rGONR) was prepared by modified microwave-assisted synthesis step and a chemical reduction.
References
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Journal ArticleDOI
Helical microtubules of graphitic carbon
TL;DR: Iijima et al. as mentioned in this paper reported the preparation of a new type of finite carbon structure consisting of needle-like tubes, which were produced using an arc-discharge evaporation method similar to that used for fullerene synthesis.
Journal ArticleDOI
Large-scale synthesis of carbon nanotubes
TL;DR: In this article, the authors used a variant of the standard arc-discharge technique for fullerene synthesis under a helium atmosphere, where a carbonaceous deposit formed on one of the graphite rods, consisting of a macroscopic (diameter of about 5 mm) cylinder.
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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.