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ECN publication
Title:
Electrode properties of Sr-doped LaMnO3 on yttria stabilized zirconia: pt.2: electrode kinetics
 
Author(s):
Heuveln, F.H. van; Bouwmeester, H.J.M.
 
Published by: Publication date:
ECN 1996
 
ECN report number: Document type:
ECN-RX--96-015 Other
 
Number of pages: Full text:
23 Download PDF  

Abstract:
A series of six cathodes Sr0.15La0.85MnO3 (SLM) on stabilisedzirconia (YSZ) with different morphology of the electrode/electrolyte interface were characterised by ac-impedance and dc-polarisation measurements. It is found that the electrode kinetics at elevated temperature (945C) are governed by two serial processes. An activation process can be identified to occur at high cathodic over potential, whereas a transport process competes with charge transfer at comparatively low overpotential. Attention is drawn to the profound change in the electrocatalytic properties of SLM upon current passage, and its influence in elucidation of the interfacial kinetics. 8 figs., 5 tabs., 11 refs.


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