Surface chemistry evolution in LnBaCo2O5 + δ double perovskites for oxygen electrodes

Helena Téllez, John Druce, Young Wan Ju, John Kilner, Tatsumi Ishihara

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

The electro-catalytically active surfaces of mixed ionic electronic conductors (MIECs) are critically important for the operation of electrochemical devices such as solid oxide electrolyser cells (SOECs) and fuel cells (SOFCs). However, the composition and morphology of surfaces of real samples are often poorly characterized, and thus our understanding of the influence of these factors on the surface exchange reactions is rudimentary. In this work, we apply low energy ion scattering (LEIS) spectrometry and atomic force microscopy (AFM) to investigate the evolution of the surface composition and morphology of two layered perovskite type materials, showing the dynamic nature of these surfaces even at room temperature.

Original languageEnglish
Pages (from-to)20856-20863
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number35
DOIs
Publication statusPublished - Dec 3 2014

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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