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Electrostatic interaction based hollow Pt and Ru assemblies toward methanol oxidation

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Electrostatic interaction based hollow Pt and Ru assemblies toward methanol oxidation

Content Provider	Royal Society of Chemistry (RSC)
Author	Hu, Weiwei Yang, Jinhua Zeng, Jianhuang Yang, Jun Liu, Hui Liao, Shijun Ye, Feng
Copyright Year	2012
Abstract	Mastery over the structure and/or composition of metal nanoparticles is an effective way to improve their catalytic activity on a mass basis. Herein, we report a facile solution route for the assembly of hollow Pt nanospheres (hPt) and ultrafine Ru nanoparticles based on electrostatic interactions. In this approach, negatively charged hollow Pt nanospheres with an average size of 12 nm and positively charged ultrafine Ru nanoparticles with an average size of 0.9 nm are first prepared, followed by the successful fabrication of hPt–Ru assemblies upon mixing the particles with opposite charges. The hPt–Ru assemblies at a Pt/Ru molar ratio of 2 : 1 exhibit superior catalytic activity toward methanol oxidation in direct methanol fuel cells for the presence of a mixed-phase containing Pt and an effective oxophilic metal, and a smaller dilution effect on the Pt surface induced by Ru in the assemblies. This study offers a vivid example to demonstrate the integration of a second oxophilic metal into the active Pt catalyst capable of enhancing its catalytic properties by means of a physical construction.
Starting Page	7479
Ending Page	7486
Page Count	8
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	2
Issue Number	19
Journal	RSC Advances
DOI	10.1039/c2ra21140h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Direct methanol fuel cell Vivid (band) Oxophilicity Molar concentration Methanol
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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