Počet záznamů: 1

Characterization of iron cationic sites in ferrierite using Mössbauer spectroscopy

  1. 1.
    0360062 - UFCH-W 2012 RIV NL eng J - Článek v odborném periodiku
    Tabor, Edyta - Závěta, K. - Sathu, Naveen Kumar - Tvarůžková, Zdenka - Sobalík, Zdeněk
    Characterization of iron cationic sites in ferrierite using Mössbauer spectroscopy.
    Catalysis Today. Roč. 169, č. 1 (2011), s. 16-23 ISSN 0920-5861
    Grant CEP: GA AV ČR KAN100400702; GA ČR GA203/09/1627
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: iron ferrierites * cationic site * Mössbauer spectroscopy
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 3.407, rok: 2011

    Iron ferrierites with low iron content and well-defined cation occupation supported by FTIR, UV–vis and EPR analysis, were utilized in order to settle the Mössbauer parameters of individual iron cationic species. These samples thus could serve as standard for establishing parameters for the Mössbauer spectroscopy analysis. In accordance with the analysis and supported by the published DFT modeling iron ions were present in three types of cationic sites (one α and two β). For the first time, experimental evidence supporting the proposed existence of two types of β sites for Fe(II) bonding has been presented. Fe(II) in two types of β sites were characterized by IS = 0.92 mm/s and QS = 0.44 mm/s, and IS = of 0.94 mm/s and QS = 0.70 mm/s. The Mössbauer parameters of the Fe(II) in α sites has been established with IS = 1.02 mm/s and QS = 2.02 mm/s.
    Trvalý link: http://hdl.handle.net/11104/0197702