Study of oxygen electrode reactions on symmetrical porous SrTi0.30Fe0.70O3-δ electrodes on Ce0.8Gd0.2O1.9 electrolyte at 800 °C–500 °C

Iron doped strontium titanates (SrTi1-xFexO3-δ) are an interesting mixed ionic-electronic conductor model used to study basic oxygen reduction/oxidation reactions. In this work, we performed an impedance spectroscopy study on symmetrical porous SrTi0.30Fe0.70O3-δ (STF70) electrodes on a ceria-based...

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Bibliographic Details
Published in:Electrochimica acta 2020-06, Vol.346, p.136285, Article 136285
Main Authors: Mroziński, Aleksander, Molin, Sebastian, Jasiński, Piotr
Format: Article
Language:English
Subjects:
Cerium oxides
Charge transfer
Circuits
Conductors
Data analysis
Distribution of relaxation times
Electrode polarization
Electrodes
Electrolytes
Impedance spectroscopy
Mixed ionic electronic conductor
Oxidation
Oxygen
Oxygen electrodes
Solid oxide cells
Strontium titanates
Surface diffusion
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Summary:Iron doped strontium titanates (SrTi1-xFexO3-δ) are an interesting mixed ionic-electronic conductor model used to study basic oxygen reduction/oxidation reactions. In this work, we performed an impedance spectroscopy study on symmetrical porous SrTi0.30Fe0.70O3-δ (STF70) electrodes on a ceria-based electrolyte. The sample was measured in varying oxygen concentration: from 0.3% to 100% in 800 °C–500 °C temperature range. Low polarisation resistance (e.g.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2020.136285