Decomposition of Potassium Ferrate(VI)(K{sub 2}FeO{sub 4}) and Potassium Ferrate(III)(KFeO{sub 2}): In-situ Moessbauer Spectroscopy Approach
- Nanomaterial Research Centre, Palacky University in Olomouc, Svobody 26, 771 46 Olomouc (Czech Republic)
- Chemistry Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901 (United States)
- Department of Nuclear Chemistry, Eoetvoes Lorand University, H-1117 Budapest, Pazmany P. s. 1/A, Budapest (Hungary)
Moessbauer spectroscopy was shown to be very useful technique studying the mechanism of thermal decomposition or aging processes of the most known ferrate(VI), K{sub 2}FeO{sub 4}. In-situ Moessbauer spectroscopy approach was used to monitor the phase composition during the studied processes. The experimental set-up was designed to perform in-situ measurements at high temperatures and at different air humid conditions at room temperature. The potassium ferrate(III), KFeO{sub 2} was demonstrated to be the primary product of thermal decomposition of K{sub 2}FeO{sub 4}. The KFeO{sub 2} was unstable in a humid air at room temperature and reacted with components of air, H{sub 2}O and CO{sub 2} to give Fe{sub 2}O{sub 3} nanoparticles and KHCO{sub 3}. The aging kinetics of K{sub 2}FeO{sub 4} and KFeO{sub 2} under humid air were significantly dependent on the relative air humidity.
- OSTI ID:
- 21251637
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1070; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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