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
Progress in catalysis in China during 1982-2012: Theory and technological innovations
TL;DR: Wang et al. as discussed by the authors proposed the development of catalytic science and technology in China dates from the early 20th century, and the efforts of our predecessors gave an initial period of steady development, then in the 1960s, there were serious obstacles by human factors during which the development was stagnant and we lost more than ten years of development opportunity.
Journal ArticleDOI
Catalyst Preparation by Electroless Plating and Hydrogen Direct Reduction Methods: Practical Application for a High Cell Performance PEFC
TL;DR: In this article, high performance Pt catalysts for polymer electrolyte fuel cells (PEFCs) were prepared by both the electroless plating and hydrogen direct reduction methods, and the catalysts were then characterized by cyclic voltammetry (CV), transmission electron microscopy (TEM), and cell performance testing.
Book ChapterDOI
Synthesis of carbon nanomaterials by chemical vapor deposition method using green chemistry principles
Diana Litzajaya García-Ruiz,Francisco Gabriel Granados-Martínez,Carmen Judith Gutiérrez-García,Jael Madaí Ambriz-Torres,José de Jesús Contreras-Navarrete,Nelly Flores-Ramírez,Francisco Méndez,Lada G. Domratcheva-Lvova +7 more
TL;DR: In this paper, the application of green-chemistry principles to the synthesis of various carbon nanomaterials is discussed, focusing on the development of emerging nanostructures; such obtained from environmental care precursors as well as reutilized materials.
Book ChapterDOI
Bio-Inspired Engineering of 3D Carbon Nanostructures
TL;DR: In this paper, the authors describe recent attractive focused progress on the synthesis of graphene-based three-dimensional (3D) nanostructures and their applications to energy-related systems.
Book ChapterDOI
Catalyst Layer Degradation, Diagnosis and Failure Mitigation
TL;DR: In this article, the authors proposed a proton exchange membrane fuel cell (PEMFC) for zero emission vehicles, stationary applications, backup power units, materials handling, and small electronics.
References
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Journal ArticleDOI
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Journal ArticleDOI
Ordered nanoporous arrays of carbon supporting high dispersions of platinum nanoparticles
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Journal ArticleDOI
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.
Journal ArticleDOI
Carbon nanotubule membranes for electrochemical energy storage and production
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