Effect of Co3O4 and Co3O4/CeO2 infiltration on the catalytic and electro-catalytic activity of LSM15/CGO10 porous cells stacks for oxidation of propene

Davide Ippolito, Kent Kammer Hansen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The objective of this work was to study the effect of Co3O4 and Co3O4/CeO2 infiltration on the propene oxidation catalytic activity of a La0.85Sr0.15MnO3/Ce0.9Gd0.1O1.95 electrochemical porous cell stack (11 layers, 5 single cells in series). The effect of the infiltration of Co3O4 and Co3O4/CeO2 on the electrochemical properties of the porous cell stack was also investigated by electrochemical impedance spectroscopy (EIS). Co3O4 and Co3O4/CeO2 exhibited high catalytic activity for propene oxidation. The increase of propene oxidation rate with +4 V (0.8 V/cell) polarization reached 10% for the Co3O4 infiltrated reactor and 48% of efficiency at 300 °C. The Co3O4/CeO2 co-infiltration decreased the reactor polarization resistance, while Co3O4 infiltration had negligible effect on reactor electrochemical performance. The beneficial effect of CeO2 on the electrode activity was attributed to the increased concentration of stable oxygen species on the electrode surface.
Original languageEnglish
JournalElectrochimica Acta
Volume159
Pages (from-to)23-28
Number of pages6
ISSN0013-4686
DOIs
Publication statusPublished - 2015

Keywords

  • Catalytic oxidation
  • Electrochemical impedance spectroscopy
  • Electrodes
  • Manganese oxide
  • Oxidation
  • Polarization
  • Propylene
  • Beneficial effects
  • Electrocatalytic activity
  • Electrochemical performance
  • Electrode activity
  • Electrode surfaces
  • Oxygen species
  • Polarization resistances
  • Propene oxidation
  • Catalyst activity

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