Effect of chemical redox on Gd-doped ceria mass diffusion

De Wei Ni; D.Z. de Florio; Debora Marani; Andreas Kaiser; V.B. Tinti; Vincenzo Esposito

doi:10.1039/c5ta05537g

Effect of chemical redox on Gd-doped ceria mass diffusion

De Wei Ni, D.Z. de Florio, Debora Marani, Andreas Kaiser, V.B. Tinti, Vincenzo Esposito

Department of Energy Conversion and Storage

Universidade Federal do ABC

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The valence and size of cations influence mass diffusion and oxygen defects in ceria. Here we show that reduction of Ce⁴⁺ to Ce³⁺, at high temperatures and low oxygen activity, activates fast diffusion mechanisms which depend on the aliovalent cation concentration. As a result, polycrystalline solid solutions with enhanced electrochemical properties are formed.

Original language	English
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	37
Pages (from-to)	18835-18838
Number of pages	4
ISSN	2050-7488
DOIs	https://doi.org/10.1039/c5ta05537g
Publication status	Published - 2015

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title = "Effect of chemical redox on Gd-doped ceria mass diffusion",

abstract = "The valence and size of cations influence mass diffusion and oxygen defects in ceria. Here we show that reduction of Ce4+ to Ce3+, at high temperatures and low oxygen activity, activates fast diffusion mechanisms which depend on the aliovalent cation concentration. As a result, polycrystalline solid solutions with enhanced electrochemical properties are formed.",

author = "Ni, {De Wei} and {de Florio}, D.Z. and Debora Marani and Andreas Kaiser and V.B. Tinti and Vincenzo Esposito",

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T1 - Effect of chemical redox on Gd-doped ceria mass diffusion

AU - Ni, De Wei

AU - de Florio, D.Z.

AU - Marani, Debora

AU - Kaiser, Andreas

AU - Tinti, V.B.

AU - Esposito, Vincenzo

PY - 2015

Y1 - 2015

N2 - The valence and size of cations influence mass diffusion and oxygen defects in ceria. Here we show that reduction of Ce4+ to Ce3+, at high temperatures and low oxygen activity, activates fast diffusion mechanisms which depend on the aliovalent cation concentration. As a result, polycrystalline solid solutions with enhanced electrochemical properties are formed.

AB - The valence and size of cations influence mass diffusion and oxygen defects in ceria. Here we show that reduction of Ce4+ to Ce3+, at high temperatures and low oxygen activity, activates fast diffusion mechanisms which depend on the aliovalent cation concentration. As a result, polycrystalline solid solutions with enhanced electrochemical properties are formed.

U2 - 10.1039/c5ta05537g

DO - 10.1039/c5ta05537g

M3 - Journal article

SN - 2050-7488

VL - 3

SP - 18835

EP - 18838

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 37

ER -

Effect of chemical redox on Gd-doped ceria mass diffusion

Abstract

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