Study of the oxygen electrode reaction using mixed conducting oxide surface layers. Part II: Small signal analysis

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Dijk, M.P. van and Vries, K.J. de and Burggraaf, A.J. (1986) Study of the oxygen electrode reaction using mixed conducting oxide surface layers. Part II: Small signal analysis. Solid State Ionics, 21 (1). pp. 83-94. ISSN 0167-2738

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Abstract:The oxygen gas electrode has been studied for a number of mixed conducting oxide surface layers on top of Gd2Zr2O7 (TGZO) solid electrolytes. In part II of this paper we present the results of frequency dispersion measurements for the electrode reaction, supplying additional information to the results of current-overvoltage experiments presented in part I. For both kinds of experiments the same trends were observed for the electrode polarization. Best results are obtained for a surface layer of TGZO, while p-type mixed conducting oxides give less decreased values of the electrode polarization. High electrode capacitances were found in the case of mixed conducting surface layers (about 700 F/m2). The electrode reactions follow a Butler-Volmer type of equation. Most probably a diffusion process is rate controlling the overall charge transfer process.
Item Type:Article
Copyright:© 1986 Elsevier Science
Link to this item:http://purl.utwente.nl/publications/69600
Official URL:http://dx.doi.org/10.1016/0167-2738(86)90012-3
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