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
Recent progress in nanostructured electrocatalysts for PEM fuel cells
TL;DR: A review of the recent progress in fuel cell electrocatalysts, which involves catalyst supports, Pt and Pt-based electrocar catalysts, and non-Pt electrocatalyst, can be found in this article.
Journal ArticleDOI
Highly Dispersed Pt Catalysts on Single-Walled Carbon Nanotubes and Their Role in Methanol Oxidation
TL;DR: Well-dispersed Pt catalysts with very high utilization efficiencies for fuel cell reactions have been prepared by ethylene glycol reduction on polymer-wrapped single-walled carbon nanotubes (SWCNTs) to achieve better dispersion.
Journal ArticleDOI
Intermetallic catalyst for carbon nanotubes (CNTs) growth by thermal chemical vapor deposition method
TL;DR: In this paper, the optimum reaction conditions of the formation of multi-wall carbon nanotubes (MWCNTs) can be obtained by using a 50mg of nano-MgNi alloy under pyrolysis of the pure CH 4 gas with the flow rate about 100-120 cm 3 /min at 650°C for 30min.
Journal ArticleDOI
Pt-Ru supported on double-walled carbon nanotubes as high-performance anode catalysts for direct methanol fuel cells.
TL;DR: The Pt-Ru/DWNTs catalyst shows the highest specific activity for methanol oxidation reaction in rotating disk electrode experiments and the highest performance as an anode catalyst in direct meethanol fuel cell (DMFC) single cell tests.
Journal ArticleDOI
Trends in the Adsorption of 3d Transition Metal Atoms onto Graphene and Nanotube Surfaces: A DFT Study and Molecular Orbital Analysis
TL;DR: In this article, the functionalization of (8,0) single-walled carbon nanotubes (SWCNTs) with individual 3D transition metal (TM) atoms was modeled using density functional theory (DFT) calculations.
References
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