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ID 48987
FullText URL
Author
Kinumoto, Taro
Fujii, Eiji
Yamamoto, Aki
Abstract
We produced carbon hybrid materials of graphene sheets decorated with metal or metal oxide nanoparticles of gold, silver, copper, cobalt, or nickel from cation exchanged graphite oxide. Measurements using powder X-ray diffraction, transmission electron microscopy, and X-ray absorption spectra revealed that the Au and Ag in the materials (Au-Gr and Ag-Gr) existed on graphene sheets as metal nanoparticles, whereas Cu and Co in the materials (Cu-Gr and Co-Gr) existed as a metal oxide. Most Ni particles in Ni-Gr were metal, but the surfaces of large particles were partly oxidized, producing a core-shell structure. The Ag-Gr sample showed a catalytic activity for the oxygen reduction reaction in 1.0 M KOH aq. under an oxygen atmosphere. Ag-Gr is superior as a cathode in alkaline fuel cells, which should not be disturbed by the methanol cross-over problem from the anode. We established an effective approach to prepare a series of graphene-nanoparticle composite materials using heat treatment.
Published Date
2011-04
Publication Title
Carbon
Volume
volume49
Issue
issue4
Start Page
1118
End Page
1125
ISSN
0008-6223
NCID
AA00598943
Content Type
Journal Article
Official Url
http://dx.doi.org/10.1016/j.carbon.2010.11.017
language
英語
Copyright Holders
(C) 2010 Elsevier Ltd. All rights reserved.
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author
Refereed
True
DOI
Web of Sience KeyUT