Title of article
Synchrotron radiation photoelectron spectroscopy study of metal-oxide thin film catalysts: Pt–CeO2 coated CNTs
Author/Authors
I. Matol?nov?، نويسنده , , R. Fiala، نويسنده , , I. Khalakhan، نويسنده , , M. Vorokhta، نويسنده , , Z. Sofer، نويسنده , , H. Yoshikawa، نويسنده , , K. Kobayashi، نويسنده , , V. Matol?n، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
4
From page
2161
To page
2164
Abstract
The interaction of Pt with CeO2 layers was investigated by using high resolution hard X-ray photoelectron spectroscopy. Pt doped CeO2 layers were deposited simultaneously by rf-magnetron sputtering on a SiO2/Si substrate and carbon nanotubes (CNTs) grown on a carbon diffusion layer of a polymer membrane fuel cell. In the case of the CNT support photoelectron spectra showed the formation of ionic platinum rich cerium oxide with Pt2+,4+ species, and with the Pt2+/Pt4+ ratio strongly dependent on the amount of platinum. Ce reveals 4+/3+ mixed valent character with Ce3+ concentration increasing with Pt content. In the case of the SiO2/Si substrate the film revealed Ce4+ and Pt4+ species only.
Keywords
Cerium oxide , Magnetron sputtering , Hard X-ray photoelectron spectroscopy , Platinum
Journal title
Applied Surface Science
Serial Year
2012
Journal title
Applied Surface Science
Record number
1004423
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