Protonic conduction in Rh-doped AZrO3 (A=Ba, Sr and Ca)

被引：52

作者：

Shimura, T ^{[1
]}

Esaka, K ^{[1
]}

Matsumoto, H ^{[1
]}

Iwahara, H ^{[1
]}

机构：

[1] Nagoya Univ, Ctr Integrated Res Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

SOLID STATE IONICS | 2002年 / 149卷 / 3-4期

关键词：

protonic conduction; perovskite; hydrogen concentration cell; hydrogen pump;

D O I：

10.1016/S0167-2738(02)00400-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The conduction behavior of rhodium-doped AZrO(3) (A=Ba, Sr and Ca) was investigated using electrical and electrochemical methods at elevated temperatures. The protonic conductivity of the Rh-doped AZrO(3) in hydrogen was close to that of the Y-doped AZrO(3). The transport numbers of the ions in hydrogen were unity in all the samples examined in this study. Under high-oxygen partial pressures, the conductivities of the Rh-doped AZrO(3) were lower than those of the Y- or In-doped AZrO(3), suggesting the low conductivity of electron holes. The oxygen partial pressure dependence of the conductivity indicates that a change in the valence of the rhodium ion might suppress the generation of mobile holes under a high-oxygen partial pressure condition. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：237 / 246

页数：10

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