On the proton conductivity in pure and gadolinium doped nanocrystalline cerium oxide

被引：87
|
作者：
Shirpour, Mona [1 ]
Gregori, Giuliano [1 ]
Merkle, Rotraut [1 ]
Maier, Joachim [1 ]
机构：
[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 03期
关键词：
D O I：
10.1039/c0cp01702g
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：
Conductivity measurements were performed on microcrystalline and nanocrystalline ceria (undoped and doped) in dry as well as wet atmosphere. Below 200-250 degrees C, the nanocrystalline samples exhibit an enhanced total conductivity under wet conditions, which increases with decreasing temperature. In addition, thermo-gravimetric analysis revealed a strong water uptake below 200 degrees C. DC-polarization measurements confirm the ionic character of conductivity in the nanocrystalline samples at low temperatures. The role of both grain boundaries and residual porosity on the enhanced conductivity below 200 degrees C is discussed.
引用
收藏
页码：937 / 940
页数：4
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