Exfoliated graphene sheets decorated with metal/metal oxide nanoparticles: Simple preparation from cation exchanged graphite oxide

被引：112

作者：

Gotoh, Kazuma ^{[1
]}

Kinumoto, Taro ^{[2
]}

Fujii, Eiji ^{[3
]}

Yamamoto, Aki ^{[1
]}

Hashimoto, Hideki ^{[1
]}

Ohkubo, Takahiro ^{[1
]}

Itadani, Atsushi ^{[1
]}

Kuroda, Yasushige ^{[1
]}

Ishida, Hiroyuki ^{[1
]}

机构：

[1] Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan

[2] Oita Univ, Fac Engn, Oita 8701192, Japan

[3] Ind Technol Ctr, New Mat Grp, Okayama 7011296, Japan

来源：

CARBON | 2011年 / 49卷 / 04期

关键词：

ANCHORING SEMICONDUCTOR; METAL NANOPARTICLES; OXYGEN REDUCTION; PD NANOPARTICLES; SUPPORT; COMPOSITES;

D O I：

10.1016/j.carbon.2010.11.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1118 / 1125

页数：8

共 33 条

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