Abstract
The electrode reaction was examined on ceria coated YSZ by a platinum point electrode in H2-H2O atmosphere at 973 K- 1173 K. The thickness of the ceria coating layer was altered from 0 to 2.5 µm, fabricated by a laser ablation and by a vacuum vapor deposition method on YSZ single crystals. The electrode / electrolyte interface conductivity increased with 1/4 powers ofp(H2) andp(H2O) on both ceria coated and non-coated YSZ. The interface conductivity was significantly improved on a thicker ceria coating surface than 1 µm. The effective electrode reaction radius also increased in a thick ceria coating. The18O/16O exchange experiment at low oxygen partial pressure revealed that the oxygen surface exchange rate of ceria is not high compared with that of YSZ. It can be concluded that the bulk ionic conduction of ceria makes a more effective contribution to the electrode reaction than the surface catalytic activity in H2-H2O atmosphere.
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References
T. Takahashi, H. Iwahara, and I. Ito,Denki Kagaku 38, 509 (1970).
H. Yahiro, Y. Baba, K. Eguchi, and H. Arai,J. Electrochem. Soc. 135, 2077 (1988).
M. Mogensen, B. Kindl and B. Malmgren-Hansen, Program and Abstract of 1990 Fuel Cell Seminar, 1990, Phoenix, Arizona (Fuel Cell Seminar Organization, 1990) pp. 195.
K. Eguchi, T. Setoguchi, T. Inoue, and H. Arai,Solid State Ionic 52, 165, (1992).
H. Miyamoto, M. Sumi, I. Koshino, F. Nanjo, and M. Funatsu, Proc. 3rd Int. Symp. on SOFC, Hawaii, 1993, eds. S. C. Singhal and H. Iwahara, (PV93–4, The Electrochemical Soceity Inc., 1993) pp.504.
H. Uchida, N. Mochizuki, and M. Watanabe,J. Electrochem. Soc. 143, 1700 (1996).
M. Watanabe, H. Uchida, and M. Yoshida,J. Electrochem. Soc. 144, 1739 (1997).
T. Tsai and S. A. Barnett,Solid State Ionics 93, 207 (1997).
T. Tsai and S. A. Barnett,Solid State Ionics 98, 191 (1997).
T. Tsai, E. Perry, and S. Barnett,J. Electrochem. Soc. 144, L130 (1997).
Y. Matsuzaki and M. Hishinuma, Program and Abstract of 1996 Fuel Cell Seminar, Orlando, Florida (1996), pp.119.
T. Horita, N. Sakai, H. Yokokawa, M. Dokiya, and T. Kawada,Solid State Ionics 86–88, 1259 (1996).
T. Horita, N. Sakai, H. Yokokawa, M. Dokiya, and T. Kawada, Proc. of the 17 th Risø International Symposium on Materials Science, Roskilde, Denmark (1996), pp. 281.
M. Kleitz, T. Kloidt, and L. Dessemond, Proc. of the 14 th Risø International Symposium on Materials Science, Roskilde, Denmark (1993), pp. 89.
J. Newman,J. Electrochem. Soc. 113, 501, (1966).
J. Fleig and J. Maier,Solid State Ionics 85, 17 (1996).
J. Fleig and J. Maier,Solid State Ionics 86–88, 1351 (1996).
T. Kawada, T. Horita, N. Sakai, H. Yokokawa, M. Dokiya, and J. Mizusaki, to be published in Proc. the 2nd International Meetings of Pacific Ceramic Societies, Cairns, Australia (1997).
R. J. Chaters, S. Carter, J. A. Kilner, and B. C. H. Steele,Solid State Inics 53–56, 859 (1992).
J. A. Kilner, Proc. of the 2nd International Symposium on Ionic and Mixed Conducting Ceramics, 1994, PV94-12, The Electrochemical Society Inc., Pennington, NJ, USA (1994), pp.174.
P. S. Manning, J. D. Sirman, J. A. Kilner,Solid State Ionics 93, 125, (1997).
J. Crank, The mathematics of Diffusion, 2nd ed. (Oxford University Press) Oxford, 1975.
J. Van Herle, T. Horita, T. Kawada, N. Sakai, H. Yokokawa, and M. Dokiya,J. European Ceramic Society 16, 961 (1996).
J-H. Park and Blumenthal,J. Electrochem. Soc. 136, 2867 (1989).
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Horita, T., Yamaji, K., Sakai, N. et al. Electrode reaction at platinum / ceria surface modified YSZ interface. Ionics 3, 67–74 (1997). https://doi.org/10.1007/BF02375526
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DOI: https://doi.org/10.1007/BF02375526