start-ver=1.4
cd-journal=joma
no-vol=49
cd-vols=
no-issue=4
article-no=
start-page=1118
end-page=1125
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=201104
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Exfoliated graphene sheets decorated with metal / metal oxide nanoparticles: simple preparation from cation exchanged graphite oxide
en-subtitle=
kn-subtitle=
en-abstract=
kn-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.
en-copyright=
kn-copyright=

en-aut-name=GotohKazuma
en-aut-sei=Gotoh
en-aut-mei=Kazuma
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=KinumotoTaro
en-aut-sei=Kinumoto
en-aut-mei=Taro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=FujiiEiji
en-aut-sei=Fujii
en-aut-mei=Eiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=YamamotoAki
en-aut-sei=Yamamoto
en-aut-mei=Aki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=HashimotoHideki
en-aut-sei=Hashimoto
en-aut-mei=Hideki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=OhkuboTakahiro
en-aut-sei=Ohkubo
en-aut-mei=Takahiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=ItadaniAtsushi
en-aut-sei=Itadani
en-aut-mei=Atsushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

en-aut-name=KurodaYasushige
en-aut-sei=Kuroda
en-aut-mei=Yasushige
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=

en-aut-name=IshidaHiroyuki
en-aut-sei=Ishida
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama Univ

affil-num=2
en-affil=
kn-affil=Oita Univ

affil-num=3
en-affil=
kn-affil=Ind Technol Ctr

affil-num=4
en-affil=
kn-affil=Okayama Univ

affil-num=5
en-affil=
kn-affil=Okayama Univ

affil-num=6
en-affil=
kn-affil=Okayama Univ

affil-num=7
en-affil=
kn-affil=Okayama Univ

affil-num=8
en-affil=
kn-affil=Okayama Univ

affil-num=9
en-affil=
kn-affil=Okayama Univ
END