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Improved Electrochemical Durability of PtRuAu/C Catalyst Synthesized by Radiolytic Process

Published online by Cambridge University Press:  02 February 2011

Satoru Kageyama ,
Akio Murakami ,
Satoshi Seino ,
Takashi Nakagawa ,
Hideo Daimon  and
Takao A. Yamamoto
Satoru Kageyama
Affiliation:
Grad. Sch. Eng., Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan.
Akio Murakami
Affiliation:
Grad. Sch. Eng., Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan.
Satoshi Seino
Affiliation:
Grad. Sch. Eng., Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan.
Takashi Nakagawa
Affiliation:
Grad. Sch. Eng., Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan.
Hideo Daimon
Affiliation:
Hitachi Maxell, Ltd., 1-1-88 Ushitora, Ibaraki, Osaka, 567-8567, Japan.
Takao A. Yamamoto
Affiliation:
Grad. Sch. Eng., Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan.
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Abstract

Nanoparticle catalyst of PtRuAu/C for direct methanol fuel cell anodes was synthesized by a radiolytic process. Its methanol oxidation activity and the electrochemical durability were evaluated by using the linear sweep voltammetry and the cyclic voltammety. The Au addition significantly improved the durability in comparison with PtRu/C catalyst without losing its high activity. The atomic structure was characterized with techniques of the transmission electron microscopy, the X-ray diffraction, the X-ray fluorescence spectroscopy and the X-ray absorption fine structure. These results implied that the arrangement of Pt and Ru atoms in the PtRuAu/C has no significant difference from that without Au, possessing a structure of Pt rich core and PtRu alloy shell. We concluded that the improvement in durability could originate from these PtRu nanoparticles decorated with Au, but not from particles with high Au contents.

Keywords

catalyticPtRu
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1311: Symposium GG – Next-Generation Fuel Cells—New Materials and Concepts , 2011 , mrsf10-1311-gg06-05
Copyright
Copyright © Materials Research Society 2011

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References

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