Journal
LANGMUIR
Volume 26, Issue 15, Pages 12824-12831Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la100399t
Keywords
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Funding
- Ministry of Education of the Czech Republic [MSM 0021620834, ME08056, MSM6046137302]
- postdoctoral project GACR [202/08/P006]
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The interaction of Pt with CeO2 layers was investigated by using photoelectron spectroscopy. The 30 nm thick Pt doped CeO2 layers were deposited simultaneously by rf-magnetron sputtering on a Si(001) substrate, multiwall carbon nanotubes (CNTs) supported by a carbon diffusion layer of a polymer membrane fuel cell and on CNTs grown on the silicon wafer by the CVD technique. The synchrotron radiation X-ray photoelectron spectra showed the formation of cerium oxide with completely ionized Pt-2+,Pt-4+ species, and with the Pt2+/Pt4+ ratio strongly dependent on the substrate. The TEM and XRD study showed the Pt2+/Pt4+ ratio is dependent on the film structure.
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