Distant binuclear vanadium V(II) cationic sites in zeolites and their reactivity

Title : Distant binuclear vanadium V(II) cationic sites in zeolites and their reactivity

Abstract:

Divalent cations stabilized in the framework of silicon rich zeolites represents redox catalytic sites applied in number of redox catalytic reactions (e.g. N₂O and NOx abatement, selective oxidation of methane to methanol). Nevertheless, the attention was focussed on metals with significantly preferred divalency as Cu, Co, Ni, Fe. In this paper, we present the first report on the preparation of silicon rich zeolite (of ferrierite topology with Si/Al 8.5) with bare divalent vanadium cations in extra-framework cationic sites. Moreover, activity of pairs of cooperating V(II) ions in binuclear cationic sites towards small important molecules is discussed.

Biography:

Jiri Dedecek Head of the Department of Structure and Dynamics in Catalysis of J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Czech Republic. His work is oriented on the application of multi-spectroscopic approach for the characterization of zeolite catalysts on an atomic level and for rational design of zeolite catalysts.