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Performance of cubic-(La,Sr)TiO3+δ as SOFC anodes

Authors: Marrero-López, D.; Irvine, J. T. S.; Ballesteros, B.; Ruiz-Morales, J. C.; Canales-Vázquez, J.;

Performance of cubic-(La,Sr)TiO3+δ as SOFC anodes

Abstract

[ES] En este trabajo se presentan las prestaciones y el potencial uso de las fases cúbicas de la serie homóloga con fórmula La4Srn-4TinO3n+2 (n≥12) preparadas por reacción en el estado sólido. A pesar de que estas fases pueden describirse como perovskitas cúbicas mediante difracción de rayos-X (DRX), existe una cantidad de oxígeno superestequiométrico respecto a la composición ideal de la perovskita ABO3 localizado en defectos lineales análogos a las capas ricas en oxígeno en La2Ti2O7. En el presente trabajo, se muestran ensayos en pilas de combustible realizados en las composiciones n=12,14 and 16 de la serie La4Srn-4TinO3n+2 , donde se muestran respuestas moderadas en hidrógeno, así como una cierta activación que favorece la oxidación del metano.

[EN] The performance and potential application of the cubic members of the La4Srn-4TinO3n+2 series of compounds, i.e. n≥12, prepared by solid state reaction are discussed. Although these phases can be indexed as cubic perovskites by X-ray diffraction (XRD), there exists some oxygen beyond the ABO3 stoichiometry accommodated in linear defects reminiscent to the oxygen rich layers in La2Ti2O7. In the present work, we report preliminary fuel cell tests of the n=12,14 and 16 of the La4Srn-4TinO3n+2 series, which reveal moderate responses under hydrogen, but also some promising results implying activation favouring methane oxidation.

The authors are indebted to Judith Oró-Solé (ICMABCSIC, Spain) and Dr Wuzong Zhou (University of St Andrews, UK) for their help with electron microscopy and the Ministerio de Ciencia y Tecnología (Spain) for a Juan de la Cierva (J. C-V) and Ramón y Cajal fellowships (J. C-V and J. C. R-M) and the Albacete Science & Technology Park for funding.

Peer reviewed

Keywords

current collector, titanates, Titanatos, ánodos, anodes, Clay industries. Ceramics. Glass, composites, TP785-869, Pilas de Combustible de Óxido Sólido, Colector de corriente, colector de corriente, titanatos, Titanates, Current collector, Anodes, Solid Oxide Fuel Cell, Composites, Ánodos

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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