Nanostructure and Surface Composition of Pt and Ru Binary Catalysts on Polyaniline-Functionalized Carbon Nanotubes

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50909

Title:	Nanostructure and Surface Composition of Pt and Ru Binary Catalysts on Polyaniline-Functionalized Carbon Nanotubes
Authors:	Lee,HY;Vogel,W;Chu,PPJ
Contributors:	化學學系
Keywords:	METHANOL FUEL-CELLS;IN-SITU;ELECTROCATALYTIC PROPERTIES;SUPPORTED PLATINUM;HIGH DISPERSION;ELECTROOXIDATION;NANOPARTICLES;CO;ELECTRODES;ALLOYS
Date:	2011
Issue Date:	2012-03-27 18:12:42 (UTC+8)
Publisher:	國立中央大學
Abstract:	Pt-Ru binary catalysts were prepared on a polyaniline-functionalized multiwalled carbon nanotube (PANi/MWCNT). PANi/MWCNT composites were synthesized by the polymerization of aniline in the presence of a carbon nanotube suspension using FeSO(4) and (NH(4))(2)S(2)O(8) as the oxidants. The Pt-Ru/PANi/MWCNT catalysts were formed by the chemical reduction of H(2)PtCl(6) and RuCl(3) using NaBH(4) as the reducing agent. The binary component catalyst is sharply distributed, with particle sizes ranging from 2.0 to 4.0 nm, and the Pt and Ru distributions are homogeneous when supported on PANi/MWCNT. In comparison, the binary catalyst supported on bare MWCNT displayed a Pt-rich core and a Ru-rich shell nanostructure. The surface composition deduced from CO stripping potentials confirms that the Ru surface content (chi(Ru)) is approximately 50% for the Pt-Ru alloy on PANi/MWCNT, and the catalyst on bare MWCNT shows nearly 70% Ru on the surface. Pt-Ru binary catalysts supported on PANi/MWCNT have higher activity, a higher Pt utilization efficiency, and much better durability when compared to other catalyst supports on bare MWCNT or on Vulcan XC-72.
Relation:	LANGMUIR
Appears in Collections:	[Department of Chemistry] journal & Dissertation

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