Počet záznamů: 1  

Role of Pt(0) in bimetallic (Pt,Fe)-FER catalysts in the N2O decomposition

  1. 1. 0379902 - UFCH-W 2014 RIV NL eng J - Článek v odborném periodiku
    Tabor, Edyta - Jíša, Kamil - Nováková, Jana - Bastl, Zdeněk - Vondrová, Alena - Závěta, K. - Sobalík, Zdeněk
    Role of Pt(0) in bimetallic (Pt,Fe)-FER catalysts in the N2O decomposition.
    Microporous and Mesoporous Materials. Roč. 165, JAN 2013 (2013), s. 40-47. ISSN 1387-1811
    Grant CEP: GA ČR GA203/09/1627
    Institucionální podpora: RVO:61388955
    Klíčová slova: bimetallic Pt,Fe-FER * Pt-FER * Pt(0) clusters
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 3.209, rok: 2013

    Presence of metallic Pt clusters highly enhances catalytic activity of iron ferrierite in N2O decomposition, even at low Pt loading (Pt/Al > 0.003). Platinum (II) cations in ferrierite are inactive; only some low activity appears with pre-reduced samples. The behavior of bimetallic Pt,Fe-ferrierites samples is strongly dependent on the sequence of introduction of platinum and iron ions into the ferrierite. This sequence does not affect cationic state of iron ions, however, it changes the state of platinum: metallic Pt clusters are formed in samples where platinum was introduced as the first component. Formation of Pt(0) clusters has been assigned to reduction of Pt ions by the decomposing acetylacetone in solution used for the ion exchange of iron ions. The presence of Pt(0) in iron ferrierite samples changes the composition of the products of decomposition of the surface NOx species formed during the decomposition of nitrous oxide. It decreases the fraction of nitrogen dioxide and increases that of nitric oxide in the desorbing products.
    Trvalý link: http://hdl.handle.net/11104/0215637