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Pt and Sn Doped Sputtered CeO2 Electrodes for Fuel Cell Applications

✍ Scribed by V. Matolín; M. Cabala; I. Matolínová; M. Škoda; M. Václavů; K.C. Prince; T. Skála; T. Mori; H. Yoshikawa; Y. Yamashita; S. Ueda; K. Kobayashi

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
447 KB
Volume
10
Category
Article
ISSN
1615-6846

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✦ Synopsis

Abstract

The interaction of Pt with CeO~2~ layers was investigated by using photoelectron spectroscopy. Thirty‐nanometre‐thick Pt and Sn doped CeO~2~ layers were deposited simultaneously by rf‐magnetron sputtering on a Si(001) substrate and a carbon diffusion layer of a polymer membrane fuel cell by using a composite CeO~2~–Pt–Sn target. The laboratory XPS and synchrotron radiation soft X‐ray and hard X‐ray photoemission spectra showed the formation of cerium oxide with completely ionised Pt^2+,4+^ species, and with Pt^4+^ embedded in the film bulk. Hydrogen/air fuel cell activity measurements normalised to the amount of Pt used revealed high specific power of up to 5.4 × 10^4^ mW mg^–1^ (Pt). The activity of these materials is explained by the strong activity of embedded Pt^n^^+^ cations.

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