Hostname: page-component-788cddb947-t9bwh Total loading time: 0 Render date: 2024-10-11T15:21:02.837Z Has data issue: false hasContentIssue false

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

Published online by Cambridge University Press:  02 February 2011

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.
Get access

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

Type
Research Article
Copyright
Copyright © Materials Research Society 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Watanabe, M. and Motoo, S., Journal of Electroanalytical Chemistry, 60, 267 (1975).Google Scholar
2. Zhang, J., Sasaki, K., Sutter, E. and Adzic, R. R., Science, 315, 220 (2007).Google Scholar
3. Liang, Z.X., Zhao, T.S. and Xu, J.B., Journal of Power Sources, 15, 166 (2008).Google Scholar
4. Sasaki, K., Wang, J.X., Naohara, H., Marinkovic, N., More, K., Inada, H. and Adzic, R.R., Journal of Power Sources, 185, 166 (2008).Google Scholar
5. Yamamoto, T. A., Nakagawa, T., Seino, S. and Nitani, H., Applied Catalysis A: General, 387, 195 (2010).Google Scholar
6. Belloni, J., Catalysis Today. 113, 141 (2006).Google Scholar
7. Daimon, H. and Kurobe, Y., Catalysis Today. 111, 182 (2006).Google Scholar
8. Onodera, T., Suzuki, S., Takamori, Y. and Daimon, H., Applied Catalysis A-General. 379, 69 (2010).Google Scholar
9. Hogarth, M. P., Platinum Metals Review, 40, 150 (1996).Google Scholar
10. To be reported elsewhere.Google Scholar
11. Nitani, H., Nakagawa, T., Daimon, H., Kurobe, Y., Ono, T., Honda, Y., Koizumi, A., Seino, S. and Yamamoto, T.A., Applied Catalysis A-General. 326, 194 (2007).Google Scholar