Influence of substitution of Co with Ti on the oxygen adsorption properties of La-Sr-Co-Fe-O perovskite-type oxide

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Abstract

The effects of total substitution of Cobalt (Co) by Titanium (Ti) on the oxygen uptake capacities and oxygen adsorption kinetics of La 0.6Sr0.4Co0.2Fe0.8O3-d (LSCoF) perovskite-type oxides were investigated by thermal analysis. The novel La0.6Sr0.4Ti0.2Fe0.8O3-d (LSTiF) perovskite-type oxides were studied in attempts to obtain higher oxygen sorption capacities. The nature of the transition metals clearly affects the oxygen uptake capacities. In both perovskite-type oxides, an increase of temperature from 700 °C to 900 °C increases the oxygen update capacity but with a substitution of Cobalt by Titanium in LSCoF, the oxygen adsorption capacity decreases to about ~2 ml/g at 900 °C.

Original languageEnglish
Pages (from-to)56-58
Number of pages3
JournalMaterials Letters
Volume127
DOIs
StatePublished - 15 Jul 2014

Keywords

  • Adsorption
  • LSCF
  • LSTF
  • Oxygen separation
  • Perovskite
  • Titanium

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