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A Theoretical Study on Proton Conduction Mechanism in BaZrO3 Perovskite

  • Taku OnishiEmail author
  • Trygve Helgaker
Part of the Progress in Theoretical Chemistry and Physics book series (PTCP, volume 27)

Abstract

Hybrid Kohn-Sham calculations were performed to clarify the proton conduction mechanism in BaZrO3 perovskite, from the viewpoint of energetics and bonding. The calculated activation energy for proton conduction was much larger than the experimental one. It is because O–H covalent bonding formation affects the low-frequency real part in AC impedance spectra. The higher proton conductivity in wet condition is derived from “proton pumping effect”. We concluded that N-doping at oxygen site enhances the proton conductivity, due to the existence of much hydrogen atoms. We also investigated hydrogen defect around zirconium vacancy.

Keywords

Proton Conduction Potential Energy Curve Oxygen Site Covalent Bonding Formation Total Energy Difference 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was partially supported by The Norwegian Research Council through the CoE Centre for Theoretical and Computational Chemistry (Grant No. 179568/V30).

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Copyright information

© Springer International Publishing Switzerland 2013

Authors and Affiliations

  1. 1.Department of Chemistry for Materials, Graduate School of EngineeringMie UniversityTsuJapan
  2. 2.The Center of Ultimate Technology on Nano-ElectronicsMie University (MIE-CUTE)TsuJapan
  3. 3.The Centre for Theoretical and Computational Chemistry (CTCC), Department of ChemistryUniversity of OsloOsloNorway

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