title: Identification of the silver state in the framework of Ag-containing zeolite by XRD, FTIR, photoluminescence,109Ag NMR, EPR, DR UV-vis, TEM and XPS investigations.
abstract: Silver has been identified in the framework of AgxSiBEA zeolites (where x = 3-6 Ag wt%) by the combined use of XRD,109Ag MAS NMR, FTIR, diffuse reflectance UV-visible, EPR and XPS spectroscopy. The incorporation of Ag ions into the framework of SiBEA zeolite has been evidenced by XRD. The consumption of OH groups as a result of their reaction with the silver precursor has been monitored by FTIR and photoluminescence spectroscopy. The changes in the silver state as a function of Ag content and thermal and hydrogen treatment at 573 K have been identified by109Ag MAS NMR, EPR, DR UV-visible, TEM and XPS investigations. The acidity of AgSiBEA has been investigated by FTIR spectroscopy of adsorbed CO and pyridine used as probe molecules.
authors.affiliation: L.V. Pisarzhevsky Institute of Physical Chemistry of the NAS of Ukraine, 31 Prosp. Nauky, 03028 Kyiv, Ukraine.
authors.forename: Nataliia
authors.initials: N
authors.lastname: Popovych
authors.affiliation: L.V. Pisarzhevsky Institute of Physical Chemistry of the NAS of Ukraine, 31 Prosp. Nauky, 03028 Kyiv, Ukraine.
authors.forename: Pavlo
authors.initials: P
authors.lastname: Kyriienko
authors.affiliation: L.V. Pisarzhevsky Institute of Physical Chemistry of the NAS of Ukraine, 31 Prosp. Nauky, 03028 Kyiv, Ukraine.
authors.forename: Sergiy
authors.initials: S
authors.lastname: Soloviev
authors.affiliation: AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland and Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7197, Laboratoire de Réactivité de Surface, 4 place Jussieu, F-75252, Paris, France. stanislaw.dzwigaj@upmc.fr.
authors.forename: Rafal
authors.initials: R
authors.lastname: Baran
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7197, Laboratoire de Réactivité de Surface, 4 place Jussieu, F-75252, Paris, France. stanislaw.dzwigaj@upmc.fr.
authors.forename: Yannick
authors.initials: Y
authors.lastname: Millot
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7197, Laboratoire de Réactivité de Surface, 4 place Jussieu, F-75252, Paris, France. stanislaw.dzwigaj@upmc.fr.
authors.forename: Stanislaw
authors.initials: S
authors.lastname: Dzwigaj