论文信息 - Interfacial impedance behaviour of polished and paint platinum electrodes at Na2WO4-Na2MoO4 solid electrolytes

Interfacial impedance behaviour of polished and paint platinum electrodes at Na2WO4-Na2MoO4 solid electrolytes

Abstract Interfacial impedances of the cell systems polished Pt/Na2WO4-Na2MoO4 and painted Pt/Na2WO4-Na2MoO4 were studied as a function of temperature and oxygen partial pressure by a.c. and pulse methods. The impedances are probably related to rate determining surface reactions of oxygen atoms and molecules. With Pt-paint, a particular type of impedance behaviour characterized by a constant phase angle, CPA, is observed: Zp=Kp(jω)−p (Kp and p independent of ω). No simple physical models were found to explain this behaviour, which is probably due to highly inhomogeneous current distribution effects.

G. Broers | P. H. Bottelberghs | G.H.J. Broers

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