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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High loading and monodispersed Pt nanoparticles on multiwalled carbon nanotubes for high performance proton exchange membrane fuel cells
TL;DR: In this paper, a new method using glacial acetic acid as a reducing agent was proposed to synthesize composite electrodes consisting of Pt nanoparticles supported on multiwalled carbon nanotubes grown directly on carbon paper.
Journal ArticleDOI
Carbon nanotubes decorated with Pt nanoparticles via electrostatic self-assembly: a highly active oxygen reduction electrocatalyst
TL;DR: X-ray diffraction and transmission electron microscope images reveal that Pt nanoparticles with an average size of ∼2.6 nm are uniformly dispersed on CNT surface and exhibit unexpectedly high activity towards oxygen reduction reaction, which can be attributed to the large electrochemical surface area.
Journal ArticleDOI
Electrophoretic deposition of carbon nanotube–ceramic nanocomposites
TL;DR: A comprehensive overview of the development of carbon nanotube (CNT)-ceramic nanocomposites by electrophoretic deposition (EPD) can be found in this article.
Journal ArticleDOI
Degradation of aqueous 2,4,4'-Trihydroxybenzophenone by persulfate activated with nitrogen doped carbonaceous materials and the formation of dimer products.
Xiaoxue Pan,Jing Chen,Nannan Wu,Yumeng Qi,Xinxin Xu,Jiali Ge,Xinghao Wang,Chenguang Li,Ruijuan Qu,Virender K. Sharma,Zunyao Wang +10 more
TL;DR: This report is the first to describe the transformation mechanism of 2,4,4'-HBP in nitrogen doped carbonaceous materials catalyzed PS system, and pyrrolic nitrogen was found to play a highly important role in the activation of PS.
Journal ArticleDOI
Fuel cell electrocatalyst using polybenzimidazole-modified carbon nanotubes as support materials.
TL;DR: This review article summarized the fundamental properties of the CNT/PBIs/Pt and discussed their potential as a new electrocatalyst for the PEFC in comparison with the conventional ones, including use of the materials for oxygen reduction catalysts and reinforcement of PBI films are summarized.
References
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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.