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
Catalytic activity of Pt anchored onto graphite nanofiber-poly (3,4-ethylenedioxythiophene) composite toward oxygen reduction reaction in polymer electrolyte fuel cells
S. Gouse Peera,K. K. Tintula,Akhila Kumar Sahu,Akhila Kumar Sahu,Sangaraju Shanmugam,Parthasarathi Sridhar,S. Pitchumani +6 more
TL;DR: In this paper, the potential of graphite nanofiber (GNF)-Poly(3,4-ethylenedioxythiophene) (PEDOT) composite is explored as a catalyst support for polymer electrolyte fuel cells (PEFCs).
Journal ArticleDOI
Highly durable Pt nanoparticle-supported carbon catalysts for the oxygen reduction reaction tailored by using an ionic liquid thin layer
Kazuki Yoshii,Keisuke Yamaji,Tetsuya Tsuda,Hiroaki Matsumoto,Takeshi Sato,Reiko Izumi,Tsukasa Torimoto,Susumu Kuwabata +7 more
TL;DR: In this article, the durability of a Pt nanoparticle-supported single-walled carbon nanotubes (Pt-SWCNTs) and a Pt-Vulcan-based catalysts was evaluated.
Journal ArticleDOI
Ni@Pt nanodisks with low Pt content supported on reduced graphene oxide for methanol electrooxidation in alkaline media
Jonathan Flórez-Montaño,Alfredo Calderón-Cárdenas,Alfredo Calderón-Cárdenas,William H. Lizcano-Valbuena,José L. Rodríguez,Elena Pastor +5 more
TL;DR: Ni@Pt/RGO nanodisks were synthesized and the electrooxidation of CO and methanol studied in this paper, which showed that Pt galvanostatically replaced Ni atoms maintaining the original (111 and 200) crystalline domains.
Journal ArticleDOI
Hydrophobic carbon nanotubes for removal of oils and organics from water
TL;DR: In this paper, the p-phenylenediamine modified carbon nanotubes (P-CNTs) were synthesized by diazotization reaction, and the resulting material showed a BET surface area of 285m2g−1 and a total volume of 0.65m3g −1 with abundant mesopores.
Journal ArticleDOI
Degradation of the Ionic Pathway in a PEM Fuel Cell Cathode
Sehkyu Park,Yuyan Shao,Haiying Wan,Vilayanur V. Viswanathan,Silas A. Towne,Peter C. Rieke,Jun Liu,Yong Wang,Yong Wang +8 more
TL;DR: In this paper, the degradation of the ionic pathway throughout the catalyst layer in proton exchange membrane fuel cells was studied under an accelerated stress test of the catalyst support (potential hold at 1.2 V).
References
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