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
Partially unzipped carbon nanotubes as a superior catalyst support for PEM fuel cells
TL;DR: The unique hybrid structure of 1D nanotube and 2D double-side graphene resulted in an outstanding electrocatalytic performance for PEM fuel cells.
Journal ArticleDOI
High density polyethylene/cenosphere composites reinforced with multi-walled carbon nanotubes: Mechanical, thermal and fire retardancy studies
TL;DR: In this article, an epoxy functionalized high density polyethylene (HDPE) along with lightweight hollow fly ash cenospheres and acid functionalized multi-walled carbon nanotubes (MWCNT) have been developed.
Journal ArticleDOI
Polymeric Ruthenium Porphyrin-Functionalized Carbon Nanotubes and Graphene for Levulinic Ester Transformations into γ-Valerolactone and Pyrrolidone Derivatives
Ting Zhang,Ting Zhang,Ting Zhang,Yao Ge,Yao Ge,Yao Ge,Xuefeng Wang,Jinzhu Chen,Jinzhu Chen,Xueli Huang,Yinnian Liao +10 more
TL;DR: Both Ru- PP/CNTs and Ru-PP/RGO showed excellent catalytic performance toward hydrogenation of biomass-related ethyl levulinate to γ-valerolactone (GVL) with Ru-centered porphyrin units as the catalytic active species.
Journal ArticleDOI
Recent developments in graphene and graphene oxide materials for polymer electrolyte membrane fuel cells applications
TL;DR: In this article , the potential role of graphene and graphene oxide (GO) in the membranes' structural modifications, and utilization of polymer matrices such as SPEEK, PBI, PANI, SPAES, Nafion, and PVA polymers is discussed.
Patent
Method for reducing NOx during combustion of coal in a burner
Bing Zhou,Sukesh Parasher,Jeffrey Hare,N. Stanley Harding,Stephanie E. Black,Kenneth R. Johnson +5 more
TL;DR: An organically complexed nanocatalyst composition is applied to or mixed with coal prior to or upon introducing the coal into a coal burner in order to catalyze the removal of coal nitrogen from the coal and its conversion into nitrogen gas prior to combustion of the coal as mentioned in this paper.
References
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