Anomalous Oxidation States in Multilayers for Fuel Cell Applications (pages 2664–2674)
James M. Perkins, Sarah Fearn, Stuart N. Cook, Rajagopalan Srinivasan, Chris M. Rouleau, Hans M. Christen, Geoff D. West, Richard J. H. Morris, Hamish L. Fraser, Stephen J. Skinner, John A. Kilner and David W. McComb
Article first published online: 2 JUL 2010 | DOI: 10.1002/adfm.201000279
Multilayer ceria/doped ceria (CeO2/Ce0.85Sm0.15O2) thin films are grown on MgO substrates by pulsed laser deposition. Ceria valence state is mapped using high resolution scanning transmission electron microscopy (STEM), showing discrete regions of 3+ and 4+ ceria cations. This anomaly is relevant to the oxygen ion conductivity of the thin film.