Publication at Faculty of Mathematics and Physics |
2011
Abstract
Interaction of aluminium with cerium oxide was studied by photoelectron spectroscopy of Al/CeO(2)(1 1 1) and CeO(2)/Al(1 1 1) model systems. It was found in both cases that metallic aluminium was immediately oxidized, CeO(2) was partially reduced and a mixed oxide with cerium present as Ce(3+) was formed.
The compound is probably cerium aluminate CeAlO(3) mixed with Al(2)O(3) or Ce(2)O(3). In both cases the intermixing was limited by the diffusion of aluminium into ceria.
The excess of deposited material above this limit formed AlO(x) and CeO(2) overlayers on the top of the mixed oxide + aluminate/CeO(2) and mixed oxide + aluminate/Al films, respectively. (C) 2010 Elsevier B.V. All rights reserved.