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Journal of Materials Science

, Volume 43, Issue 5, pp 1587–1592 | Cite as

Proton and oxide-ionic conduction in Sr- and Zn-doped LaGaO3

  • Feng Zhang
  • Linluan Sun
  • Jianli Zhu
  • Bo Pan
  • Rui Xu
  • Guilin Ma
Article

Abstract

The ionic conduction behaviors in La0.9Sr0.1Ga0.9Zn0.1O3−α under different atmospheres at 600–1,000 °C were studied by various electrochemical methods including ac impedance, hydrogen and oxygen concentration cells, electrochemical hydrogen and oxygen pumping, etc. The proton conduction in this oxide was investigated for the first time. The hydrogen concentration cell and oxygen concentration cell showed stable electromotive forces close to the theoretical ones calculated from Nernst’s equation, indicating that the conduction was almost pure ionic under hydrogen atmosphere or dry oxygen atmosphere. The electrochemical hydrogen pumping rates coincided with the theoretical ones calculated from Faraday’s law, confirming that La0.9Sr0.1Ga0.9Zn0.1O3−α is a proton conductor under hydrogen atmosphere. A similar result for electrochemical oxygen pumping was obtained, indicating that it is an oxide-ionic conductor under dry oxygen atmosphere. The ionic conductivity was about 0.06 S cm−1 at 1,000 °C.

Keywords

Proton Conduction Hydrogen Atmosphere pH2O Electrochemical Hydrogen Hydrogen Evolution Rate 

Notes

Acknowledgement

The present study was supported by the Natural Science Foundation of China (No. 20771079).

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Feng Zhang
    • 1
    • 2
  • Linluan Sun
    • 1
  • Jianli Zhu
    • 1
  • Bo Pan
    • 1
  • Rui Xu
    • 1
  • Guilin Ma
    • 1
  1. 1.Key Laboratory of Organic Synthesis of Jiangsu Province, School of Chemistry and Chemical EngineeringSuzhou UniversitySuzhouChina
  2. 2.Analysis and Testing CenterSuzhou UniversitySuzhouChina

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