Effects of Grain Boundary Decoration on the Electrical Conduction of Nanocrystalline CeO2

Francesco Giannici; Antonino Martorana; Piero Lupetin; Joachim Maier; Giuliano Gregori

Effects of Grain Boundary Decoration on the Electrical Conduction of Nanocrystalline CeO2

Francesco Giannici, Antonino Martorana, Piero Lupetin, Joachim Maier, Giuliano Gregori

Fisica e Chimica - Emilio Segrè

Risultato della ricerca: Article › peer review

21 Citazioni (Scopus)

Abstract

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.

Lingua originale	English
pagine (da-a)	B417-B425
Numero di pagine	9
Rivista	Journal of the Electrochemical Society
Volume	159
Stato di pubblicazione	Published - 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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year = "2012",

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T1 - Effects of Grain Boundary Decoration on the Electrical Conduction of Nanocrystalline CeO2

AU - Giannici, Francesco

AU - Martorana, Antonino

AU - Lupetin, Piero

AU - Maier, Joachim

AU - Gregori, Giuliano

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

UR - http://hdl.handle.net/10447/61882

UR - http://jes.ecsdl.org/content/159/4/B417

M3 - Article

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SP - B417-B425

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JF - Journal of the Electrochemical Society

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