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

Nataliia Popovych; Pavlo Kyriienko; Sergiy Soloviev; Rafal Baran; Yannick Millot; Stanislaw Dzwigaj

doi:10.1039/c6cp05263k

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

Phys Chem Chem Phys. 2016 Oct 26;18(42):29458-29465. doi: 10.1039/c6cp05263k.

Authors

Nataliia Popovych¹, Pavlo Kyriienko¹, Sergiy Soloviev¹, Rafal Baran², Yannick Millot³, Stanislaw Dzwigaj³

Affiliations

¹ L.V. Pisarzhevsky Institute of Physical Chemistry of the NAS of Ukraine, 31 Prosp. Nauky, 03028 Kyiv, Ukraine.
² 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.
³ 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.

PMID: 27738686
DOI: 10.1039/c6cp05263k

Abstract

Silver has been identified in the framework of Ag_xSiBEA 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 by ¹⁰⁹Ag 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.