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EXAFS Study on Nanosized PtRu Catalyst for Direct Methanol Fuel Cell

Published online by Cambridge University Press:  01 February 2011

Hiroaki Nitani,
Takahiro Ono,
Yusuke Honda,
Akiko Koizumi,
Takashi Nakagawa,
Takao A. Yamamoto,
Hideo Daimon and
Yukiko Kurobe
Hiroaki Nitani
Affiliation:
h-nitani@mit.eng.osaka-u.ac.jp, Graduate School of Engineering, Osaka University, Dept. of Management of Industry and Technology, 2-1 Yamada-oka, Suita city, Osaka pref., 565-0871, Japan, +81 6 6879 7886, +81 6 6879 7886
Takahiro Ono
Affiliation:
t-ono@mit.eng.osaka-u.ac.jp, Graduate School of Engineering, Osaka University, Japan
Yusuke Honda
Affiliation:
y-honda@mit.eng.osaka-u.ac.jp, Graduate School of Engineering, Osaka University, Japan
Akiko Koizumi
Affiliation:
a-koizumi@mit.eng.osaka-u.ac.jp, Graduate School of Engineering, Osaka University, Japan
Takashi Nakagawa
Affiliation:
nakagawa@mit.eng.osaka-u.ac.jp, Graduate School of Engineering, Osaka University, Japan
Takao A. Yamamoto
Affiliation:
takao@mit.eng.osaka-u.ac.jp, Graduate School of Engineering, Osaka University, Japan
Hideo Daimon
Affiliation:
hideo-daimon@maxell.co.jp, Hitachi Maxell Ltd., Development & Technology Division, Japan
Yukiko Kurobe
Affiliation:
yukiko-kurobe@maxell.co.jp, Hitachi Maxell Ltd., Development & Technology Division
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Abstract

Nano-sized PtRu catalysts supported on carbon nanoparticles were synthesized by a polyol process. The PtRu catalyst prepared at pH=3 indicated higher catalysis for methanol oxidation than one prepared at pH=5.5. The samples were analyzed by techniques of the extended X-ray absorption fine structure (EXAFS), transmission electron microscope (TEM), X-ray diffraction (XRD) and X-ray fluorescence (XRF). Their results showed that the pH of the precursor solution during the polyol process affected the substructure of the PtRu nanoparticles. The correlation of the substructure with the catalytic activity was studied.

Keywords

catalyticnanostructureextended x-ray absorption fine structure(EXAFS)

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References

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