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Preparation of Platinum Nanoparticles Using Linear Polyethyleneimine as a Stabilizer by Liquid-phase Reduction Method

Published online by Cambridge University Press:  31 January 2011

Takanori Imai ,
Yoshimoto Abe ,
Keishi Nishio ,
Ryuji Tamura ,
Hirobumi Shibata ,
Tohru Kineri  and
Takahiro Gunji
Takanori Imai
Affiliation:
j7208615@ed.noda.tus.ac.jp, Tokyo University of Science, Department of Pure and Applied Chemistry, Noda, Japan
Yoshimoto Abe
Affiliation:
abeyoshi@rs.noda.tus.ac.jp, Tokyo University of Science, Department of Pure and Applied Chemistry, Noda, Japan
Keishi Nishio
Affiliation:
k-nishio@rs.noda.tus.ac.jp, Tokyou University of Science, Materials Science and Technology, 2641 yamazaki, Noda-shi, 278-8510, Japan
Ryuji Tamura
Affiliation:
Tokyo University of Science, Department of Materials Science and Technology, Noda, Japan
Hirobumi Shibata
Affiliation:
shibata@rs.noda.tus.ac.jp, Tokyo University of Science, Department of Materials Science and Technology, Noda, Japan
Tohru Kineri
Affiliation:
tkineri@ed.yama.tus.ac.jp, Tokyo University of Science, Yamaguchi, Materials Science & Environmental Engineering, Sanyo-Onoda-shi, Japan
Takahiro Gunji
Affiliation:
gunji@rs.noda.tus.ac.jp, Tokyo University of Science, Department of Pure and Applied Chemistry, 2641 Yamazaki, Noda, 278-8510, Japan, +81-4-7122-9499, +81-4-7123-9890
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Abstract

Platinum nanoparticles stabilized by linear polyethyleneimine were prepared by the liquid-phase reduction of chloroplatinic(IV) acid with sodium borohydride. The particle sizes were 3.26 nm and 1.76 nm when the molecular weights of linear polyethyleneimine were 25000 and 2150, respectively. These nanoparticles were well-dispersed in water in the range of pH 1-6. Branched polyethyleneimine also provided nanoparticles that dispersed in water in the range of pH 0-8. Linear poly(ethyleneimine-co-N-methylethyleneimine) gave nanoparticles that dispersed in water in the range of pH 0-10. The dispersibility of the nanoparticles decreased with increasing content of the N-methyl group.

Keywords

nanostructurePtchemical synthesis
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1217: Symposium Y – Catalytic Materials for Energy, Green Processes and Nanotechnology , 2009 , 1217-Y08-17
Copyright
Copyright © Materials Research Society 2010

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