Počet záznamů: 1

Tailoring of Fe-ferrierite for N2O decomposition: On the decisive role of framework Al distribution for catalytic activity of Fe species in Fe-ferrierite

  1. 1.
    0363452 - UFCH-W 2012 RIV NL eng J - Článek v odborném periodiku
    Sobalík, Zdeněk - Nováková, Jana - Dědeček, Jiří - Sathu, Naveen Kumar - Tabor, Edyta - Sazama, Petr - Štastný, P. - Wichterlová, Blanka
    Tailoring of Fe-ferrierite for N2O decomposition: On the decisive role of framework Al distribution for catalytic activity of Fe species in Fe-ferrierite.
    Microporous and Mesoporous Materials. Roč. 146, 1-3 (2011), s. 172-183 ISSN 1387-1811
    Grant CEP: GA ČR GAP106/11/0624; GA ČR GA203/09/1627; GA AV ČR IAA400400904; GA AV ČR KAN100400702
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: N2O decomposition * Fe-ferrierite * Al distribution in zeolites
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 3.285, rok: 2011

    Two parent ferrierites with similar Si/Al ratio (8.5 and 10.5), a commercial and a laboratory specimen with different distribution of Al atoms in the framework, were used for the preparation of model Fe-ferrierite catalysts for N2O decomposition. As proven by UV–Vis analysis of the fully exchanged Co(II)-ferrierites, the two ferrierites differ in the distribution of framework Al between Al–O–(Si–O)2–Al sequences in one ring (Al pairs) and single Al atoms in different rings (Al–O–(Si–O)n>2–Al sequences). The part of the framework Al atoms arranged in Al pairs mostly in β six-member rings was 66% and 30% of Al for the two ferrierites. Two series of Fe-ferrierites with low concentration between 0.4 and 2.1 wt.% Fe were prepared, containing Fe ions in cationic sites, and valence and siting analyzed by Mössbauer spectroscopy of 57Fe isotope enriched (96%) samples.
    Trvalý link: http://hdl.handle.net/11104/0199329