Application of microelectrodes for investigation of the oxygen electrode reaction in selected solid electrolytes

• Autorzy: Raźniak A. , Tomczyk P.
• Języki publikacji: EN

Abstrakty

EN

In a solid oxide fuel cell (SOFC), the most often used solid electrolyte is yttria stabilized zirconia. Usually, SOFC of a tubular geometry operates at ca. 1000 °C. To decrease the temperature of the cell, it is necessary to reduce the thickness of electrolyte or replace yttrium-stabilized zirconium with an other electrolyte of a much higher ionic conductivity. A potential candidate for an electrolyte in intermediate temperature SOFC is gadolinia doped ceria. The largest energetic losses in a fuel cell of this type, apart of ohmic polarizations, are attributed to slow kinetics of the cathodic process. In this work, investigated oxygen electrode reaction for two various electrolytes: yttria stabilized zirconia and gadolinia doped ceria. The measurements were conducted using microelectrodes for which analysis of kinetic parameters of the electrode reaction is easier. Gold electrodes were applied in the experiments. Although Au is a good electrocatalyst for oxygen reduction, almost no research has been done for this metal so far. The performance of the electrode and results of impedance measurements have been presented and discussed.

Słowa kluczowe

EN

fuel cell; oxygen electrode; microelectrode; solid electrolyte; YSZ; GDC

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2008
• Tom: Vol. 26, No. 1
• Strony: 195--206
• Opis fizyczny: Bibliogr. 23 poz.

Twórcy

autor

Raźniak A.

autor

Tomczyk P.

• Faculty of Fuels and Energy, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland,

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