Sr0.95Ca0.05Fe0.5Co0.5 O3-δ and Sr0.5Ca0.5Fe0.5Co0.5 O3-δ perovskites were studied by 57Fe emission Mössbauer spectroscopy. It was found that Co prefers lower valence and lower coordination number than Fe in both compounds. The comparison of the emission and transmission Mössbauer spectra of the CO2 treated materials revealed a preferred formation of Fe-containing products in reaction with CO2 in Sr0.5Ca0.5Fe0.5Co0.5 O3-δ, and it is proposed that such a reaction can be responsible for phase separation in Sr0.95Ca0.05Fe0.5Co0.5 O3-δ after absorption and partial desorption of CO2 at 950 °C.
ASJC Scopus subject areas
- Analytical Chemistry
- Nuclear Energy and Engineering
- Radiology Nuclear Medicine and imaging
- Public Health, Environmental and Occupational Health
- Health, Toxicology and Mutagenesis