Electrode properties of Sr-doped LaMnO{sub 3} on yttria-stabilized zirconia. 2: Electrode kinetics
- Netherlands Energy Research Foundation ECN, Petten (Netherlands)
- Univ. of Twente, Enschede (Netherlands). Dept. of Chemical Technology
A series of six cathodes Sr{sub 0.15}La{sub 0.85}MnO{sub 3} (SLM) on yttria-stabilized zirconia with different morphology of the electrode/electrolyte interface were characterized by ac impedance and dc polarization measurements. It is found that the electrode kinetics at elevated temperature (945 C) are governed by two serial processes. An activation process can be identified to occur at high cathodic overpotential, whereas a transport process competes with charge-transfer at comparatively low overpotential. Attention is drawn to the profound change in the electrocatalytic properties of Sr{sub 0.15}La{sub 0.85}MnO{sub 3} upon current passage and its influence in elucidation of the interfacial kinetics.
- Sponsoring Organization:
- Commission of the European Communities, Brussels (Belgium)
- OSTI ID:
- 452220
- Journal Information:
- Journal of the Electrochemical Society, Vol. 144, Issue 1; Other Information: PBD: Jan 1997
- Country of Publication:
- United States
- Language:
- English
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