Effect of Ba Content on the Activity of La1-xBaxMnO3 Towards the Oxygen Reduction Reaction

Gael P.A. Gobaille-Shaw, Veronica Celorrio*, Laura Calvillo, Louis J. Morris, Gaetano Granozzi, David J. Fermín

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
216 Downloads (Pure)

Abstract

The electrocatalytic activity of La1-xBaxMnO3 nanoparticles towards the oxygen reduction reaction (ORR) is investigated as a function of the A-site composition. Phase-pure oxide nanoparticles with a diameter in the range of 40 to 70 nm were prepared by using an ionic liquid route and deposited onto mesoporous carbon films. The structure and surface composition of the nanoparticles are probed by XRD, TEM, EDX, and XPS. Electrochemical studies carried out under alkaline conditions show a strong correlation between the activity of La1-xBaxMnO3 and the effective number of reducible Mn sites at the catalysts layer. Our analysis demonstrates that, beyond controlling particle size and surface elemental segregation, understanding and controlling Mn coordination at the first atomic layer is crucial for increasing the performance of these materials.

Original languageEnglish
Pages (from-to)1922-1927
Number of pages6
JournalChemElectroChem
Volume5
Issue number14
Early online date6 Apr 2018
DOIs
Publication statusPublished - 11 Jul 2018

Keywords

  • Electrocatalysis
  • kinetics
  • LaBaMnO
  • oxygen reduction reaction
  • perovskite nanoparticles

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