The Interaction of Cobalt with CeO2(111) Prepared on Cu(111)

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Vari G, Ovari L, Papp C, Steinrück HP, Kiss J, Konya Z
Zeitschrift: Journal of Physical Chemistry C
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2015
Band: 119
Heftnummer: 17
Seitenbereich: 9324-9333
ISSN: 1932-7447
eISSN: 1932-7455


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.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Papp, Christian PD Dr.
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Einrichtungen weiterer Autorinnen und Autoren

University of Szeged / József Attila Tudományegyetem Szeged


Forschungsbereiche

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

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.

BibTeX: 

Zuletzt aktualisiert 2019-06-08 um 09:05