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Pt and Sn Doped Sputtered CeO 2 Electrodes for Fuel Cell Applications
Author(s) -
Matolín V.,
Cabala M.,
Matolínová I.,
Škoda M.,
Václavů M.,
Prince K.C.,
Skála T.,
Mori T.,
Yoshikawa H.,
Yamashita Y.,
Ueda S.,
Kobayashi K.
Publication year - 2010
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.200900036
Subject(s) - x ray photoelectron spectroscopy , materials science , analytical chemistry (journal) , substrate (aquarium) , sputter deposition , hydrogen , cerium , doping , anode , sputtering , carbon fibers , cerium oxide , electrode , oxide , chemical engineering , thin film , composite number , nanotechnology , optoelectronics , chemistry , metallurgy , composite material , oceanography , organic chemistry , chromatography , engineering , geology
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.