Metallic Nanoparticles and Proton Conductivity: Improving Proton Conductivity of BaCe0.9Y0.1O3-δ and La0.75Sr0.25Cr0.5Mn0.5O3-δ by Ni-doping

被引：5

作者：

Caldes, M. T. ^{[1
]}

Kravchyk, K. V. ^{[1
]}

Benamira, M. ^{[1
]}

Besnard, N. ^{[1
]}

Joubert, O. ^{[1
]}

Bohnke, O.

Gunes, V.

Jarry, A. ^{[1
]}

Dupre, N. ^{[1
]}

机构：

[1] Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, F-44322 Nantes 3, France

来源：

IONIC AND MIXED CONDUCTING CERAMICS 8 | 2012年 / 45卷 / 01期

关键词：

D O I：

10.1149/1.3701303

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work we have used metallic nanoparticles to improve proton conductivity of the ceramic electrolyte BaCe0.9Y0.1O3-delta (BCY) and of the electrode material La0.75Sr0.25Cr0.5Mn0.5O3-delta (LSCM). Instead of adding metallic nanoparticles as a separate phase, they were dissolved in the compounds as their oxidized form (Ni2+). The metal nanoparticles precipitated from compounds upon heating under reducing atmosphere. Below 600 degrees C under reducing atmosphere, BaCe0.9-xY0.1NixO3-delta compounds exhibit higher conductivity than BCY. Thus, an increase of one order of magnitude was observed for BaCe0.7Y0.1Ni0.2O3-delta. A protonic contribution to the total conductivity is observed below 600 degrees C. This phenomenon is more pronounced for the compounds containing more nickel in surface which can facilitate the dissociation of hydrogen and the incorporation of protons in the structure. La0.75Sr0.25Cr0.5Mn0.5-xNixO3-delta compounds show also a protonic contribution to the total conductivity below 400 degrees C. NMR results confirmed that these compounds contain protons.

引用

页码：143 / 154

页数：12

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