The Interaction of Cobalt with CeO2(111) Prepared on Cu(111)
Vari G, Ovari L, Papp C, Steinrück HP, Kiss J, Konya Z (2015)
Publication Status: Published
Publication Type: Journal article
Publication year: 2015
Journal
Publisher: American Chemical Society
Book Volume: 119
Pages Range: 9324-9333
Journal Issue: 17
Abstract
The interaction of cobalt with an ultrathiri CeO2(111) film on Cu(111) was studied by low energy ion scattering spectroscopy and X-ray photoelectron spectroscopy. At room temperature, Co grows three-dimensionally on the ceria film. For small Co coverages (0.2 ML), oxidation to Co2+ occurs together with the formation Of Ce3+ in the ceria. At higher Co coverages (07 and 2 ML), an increasing fraction of Co remained Metallic after deposition. Annealing to higher temperatures induced diffusion of Co2+ ions into the ceria film, and for metallic Co, presumably agglomeration occurs. At T >= 800 K, oxidation of significant amounts of Co-0 to Co2+ is found, along with diffusion, into the ceria. film, and partly also in the copper crystal underneath. On a reduced CeOx surface, the redox reaction between cobalt and cerium was hindered, which, in turn, slowed down cobalt migration into the ceria film.
Authors with CRIS profile
Christian Papp
Lehrstuhl für Physikalische Chemie II
Hans-Peter Steinrück
Lehrstuhl für Physikalische Chemie II
Additional Organisation(s)
Involved external institutions
Hungary (HU)How to cite
APA:
Vari, G., Ovari, L., Papp, C., Steinrück, H.-P., Kiss, J., & Konya, Z. (2015). The Interaction of Cobalt with CeO2(111) Prepared on Cu(111). Journal of Physical Chemistry C, 119(17), 9324-9333. https://dx.doi.org/10.1021/acs.jpcc.5b00626
MLA:
Vari, Gabor, et al. "The Interaction of Cobalt with CeO2(111) Prepared on Cu(111)." Journal of Physical Chemistry C 119.17 (2015): 9324-9333.
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