6533b836fe1ef96bd12a0a27
RESEARCH PRODUCT
Effects of Grain Boundary Decoration on the Electrical Conduction of Nanocrystalline CeO2
Piero LupetinFrancesco GianniciJoachim MaierGiuliano GregoriAntonino Martoranasubject
Materials scienceEXAFS ceria oxide ion conductorCondensed matter physicsRenewable Energy Sustainability and the EnvironmentElectrical conductionMaterials ChemistryElectrochemistryGrain boundaryCondensed Matter PhysicsNanocrystalline materialSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialsdescription
In this study, we investigate the effect of decorating the grain boundaries of nanocrystalline undoped ceria on the electrical transport properties. For the decoration, different acceptors (Yb, Y, Bi) were chosen. On decoration, the conduction switches from electronic to ionic. Upon sintering the grains are characterized by a core-shell configuration, in which the core remains undoped while the shell is heavily doped as a consequence of the diffusion of the acceptors toward the grain interior. The shell dominates the overall transport properties of the nanocrystalline ceria and is found to be in the mesoscopic regime.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 | Journal of The Electrochemical Society |