N2O decomposition over Fe-FER: A Mössbauer study of the active sites

0364619 - ÚFCH JH 2012 RIV NL eng J - Journal Article
Tabor, Edyta - Závěta, K. - Sathu, Naveen Kumar - Vondrová, Alena - Sazama, Petr - Sobalík, Zdeněk
N2O decomposition over Fe-FER: A Mössbauer study of the active sites.
Catalysis Today. Roč. 175, č. 1 (2011), s. 238-244. ISSN 0920-5861. E-ISSN 1873-4308
R&D Projects: GA AV ČR KAN100400702; GA ČR GA203/09/1627; GA ČR GP203/08/P593
Institutional research plan: CEZ:AV0Z40400503
Keywords : iron ferrierites * N2O decomposition * cationic sites
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 3.407, year: 2011

Iron ferrierites with low iron content (Fe/Al between 0.018 and 0.072) were used as model catalysts to evaluate the participation of individual iron species, with special interest in the role of iron in β cationic sites, for formation of active sites for N2O decomposition. Despite low iron content, the catalysts with prevailing iron located in β sites of two types exhibited high conversions of N2O and activity increase with increase of iron loading. These results indicate formation of the active iron species already at very low concentrations, while at higher concentration level would part of the iron enter also into less active positions. Semi-quantitative analysis of the TOF values of individual iron centers was done using the recently established Mössbauer parameters of the Fe(II) parameters for individual iron cationic species, i.e. β (β-1 and β-2) and α sites [1].
Permanent Link: http://hdl.handle.net/11104/0200057