Issue 11, 2003
From the journal:

Physical Chemistry Chemical Physics

Effect of water vapour on oxygen exchange kinetics of ceria and zirconia solid electrolytes†

Natsuko Sakai,a   Katsuhiko Yamaji,a   Teruhisa Horita,a   Haruo Kishimoto,a   Yue Ping Xionga  and  Harumi Yokokawaa  

a National Institute of Advanced Industrial Science and Technology, AIST Central 5, Tsukuba, Japan
E-mail: n-sakai@aist.go.jp
Fax: +81 29 861 4540
Tel: +81 29 861 4890

Abstract

The effect of water vapour on the oxygen isotope exchange reaction was investigated for gadolinium doped ceria (GDC), scandium stabilized zirconia (ScSZ), and iron doped ScSZ (Fe-ScSZ). A slight amount of water vapour addition made a great enhancement of surface exchange rate of oxygen isotope (18O) on the surface. The surface exchange rate constant of ScSZ and Fe-ScSZ increases with partial pressure of water vapour, whereas the oxygen isotope diffusivity has no dependence. The temperature and water vapour pressure dependences of surface exchange rate are in good agreement with the dependences of water coverage reported on yttria stabilized zirconia (YSZ) surface, which indicates that the adsorbed water molecule plays an important role on the surface exchange reaction.

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Article information

DOI
https://doi.org/10.1039/B300227F
Article type
Paper
Submitted
07 Jan 2003
Accepted
28 Feb 2003
First published
12 Mar 2003

Phys. Chem. Chem. Phys., 2003,5, 2253-2256

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Effect of water vapour on oxygen exchange kinetics of ceria and zirconia solid electrolytes

N. Sakai, K. Yamaji, T. Horita, H. Kishimoto, Y. P. Xiong and H. Yokokawa, Phys. Chem. Chem. Phys., 2003, 5, 2253 DOI: 10.1039/B300227F

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