Influence of the transition-metal doping on conductivity of a BaCeO3-based protonic conductor

被引：74

作者：

Shimura, T ^{[1
]}

Tanaka, H

Matsumoto, H

Yogo, T

机构：

[1] Nagoya Univ, EcoTopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

SOLID STATE IONICS | 2005年 / 176卷 / 39-40期

关键词：

perovskite; protonic conduction; transition metal;

D O I：

10.1016/j.ssi.2005.09.027

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 effect of transition metal (Mn, Fe and Co) doping to the Ce-site of the perovskite-type protonic conductor BaCe0.90Y0.10O3 - delta was examined. Single-phase samples of BaCe0.90-xY0.10MxO3 - delta were obtained at 0 <= x <= 0.10 for M=Mn and Co and at 0 <= x <= 0.075 for M=Fe. The conductivity of the samples in air decreased with transition-metal doping. Among the doped samples, Mn-doped solutions showed the lowest conductivity and the highest activation energy of conduction. The conductivity of these samples was independent of the concentration of the transition metals (x). This behavior of the conductivity could be explained by supposing the generation of the impurity state by transition-metal doping inside the band gap. In hydrogen, samples showed ionic conduction. The influence of transition-metal doping on the conduction behavior in hydrogen is small. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：2945 / 2950

页数：6

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