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ID 48987
フルテキストURL
著者
Gotoh, Kazuma Okayama Univ
Kinumoto, Taro Oita Univ
Fujii, Eiji Ind Technol Ctr
Yamamoto, Aki Okayama Univ
Hashimoto, Hideki Okayama Univ
Ohkubo, Takahiro Okayama Univ
Itadani, Atsushi Okayama Univ
Kuroda, Yasushige Okayama Univ
Ishida, Hiroyuki Okayama Univ
抄録
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.
発行日
2011-04
出版物タイトル
Carbon
49巻
4号
開始ページ
1118
終了ページ
1125
ISSN
0008-6223
NCID
AA00598943
資料タイプ
学術雑誌論文
オフィシャル URL
http://dx.doi.org/10.1016/j.carbon.2010.11.017
言語
English
著作権者
(C) 2010 Elsevier Ltd. All rights reserved.
論文のバージョン
author
査読
有り
DOI
Web of Sience KeyUT