Skip to content

Research at St Andrews

Effect of the synthesis conditions on the properties of La0.15Sm0.35Sr0.08Ba0.42FeO3 − δ cathode material for SOFCs

Research output: Research - peer-reviewArticle



K. Vidal, A. Larrañaga, A. Morán-Ruiz, M. A. Laguna-Bercero, R. T. Baker, M. I. Arriortua

School/Research organisations


The perovskite La0.15Sm0.35Sr0.08Ba0.42FeO3 − δ has been prepared by the glycine nitrate (GNC) route, varying the fuel/oxidizer ratio (glycine/nitrate, G/N = 1 and 2) and cooling rate (slow cooling and air-quenched), in order to study the influence of sample preparation on the materials' properties, in the context of their application as a cathode material for SOFCs. For this, the performance of the prepared mixed ion and electron conducting perovskite oxides is dictated by their structure, oxygen stoichiometry (3 − δ), chemical composition and thermal expansion properties. High-resolution Synchrotron X-ray powder diffraction patterns were collected at room temperature and at 700 and 800 °C. It was found that the materials had a cubic crystal structure at these temperatures. As expected, 3 − δ decreased as temperature increased, and was slightly smaller for the quenched sample. Higher electrical conductivity values were obtained for the sample with G/N = 1 (air-quenched) in the cooling rate. At 700 and 800 °C the cathode synthesized with G/N = 1 and air-quenched showed the smallest polarization resistance values in impedance spectroscopy studies. Therefore, the physicochemical and electrochemical characterization clearly demonstrated the influence of the synthetic conditions on the cathode performance.


Original languageEnglish
Pages (from-to)131-139
Number of pages9
JournalPowder Technology
Early online date13 Sep 2017
StatePublished - Dec 2017

    Research areas

  • Chemical synthesis, Oxygen content, Cathode material, SOFC, Impedance spectroscopy

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Physicochemical properties of nanostructured Pd/lanthanide-doped ceria spheres with high catalytic activity for CH4 combustion

    Fuentes, R. O., Acuña, L. M., Leyva, A. G., Baker, R. T., Pan, H., Chen, X. & Delgado-Jaén, J. F. 7 May 2018 In : Journal of Materials Chemistry A. 6, 17, p. 7488-7499 12 p.

    Research output: Research - peer-reviewArticle

  2. Ionic conductivity in multiply substituted ceria-based electrolytes

    Coles-Aldridge, A. V. & Baker, R. T. Mar 2018 In : Solid State Ionics. 316, p. 9-19 11 p.

    Research output: Research - peer-reviewArticle

  3. Influence of electrolytes of Li salts, EMIMBF4 and mixed phases on electrochemical and physical properties of Nafion membrane

    Safari, M., Naji, L., Baker, R. T. & Afshar Taromi, F. 15 Sep 2017 In : Journal of Applied Polymer Science. 134, 35, 45239

    Research output: Research - peer-reviewArticle

  4. Acetylene hydrogenation over structured Au-Pd catalysts

    McCue, A. J., Baker, R. & Anderson, J. A. 1 Jul 2016 In : Faraday Discussions. 188, p. 449-523 25 p.

    Research output: Research - peer-reviewArticle

  5. Visualisation of single atom dynamics in water gas shift reaction for hydrogen generation

    Gai, P. L., Yoshida, K., Ward, M. R., Walsh, M., Baker, R., van der Water, L., Watson, M. J. & Boyes, E. D. 7 Apr 2016 In : Catalysis Science & Technology. 6, 7, p. 2214-2227

    Research output: Research - peer-reviewArticle

ID: 251061112