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