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