TY - JOUR T1 - Role of Silver Nanoparticles in Enhanced Xenon Adsorption Using Silver-Loaded Zeolites JF - Journal of Physical Chemistry C Y1 - 2014 A1 - Deliere, Ludovic A1 - Topin, Sylvain A1 - Benoit A. Coasne A1 - Fontaine, Jean-Pierre A1 - De Vito, Sophie A1 - Den Auwer, Christophe A1 - Solari, Pier Lorenzo A1 - Daniel, Cecile A1 - Schuurman, Yves A1 - David Farrusseng AB -
Abstract Image

Molecular simulation is used to unravel the adsorption mechanisms of xenon on Ag-doped ZSM-5 zeolite. We show that silver nanoparticles, which form at the external surface of zeolite crystallites, are responsible for enhanced xenon physisorption at very low pressure. We also propose a simple model of adsorption on such composite materials made up of silver-exchanged zeolites and silver nanoparticles adsorbed at the zeolite surface. This model, which allows predicting the adsorption of other gases without any additional parameters, provides a tool to characterize the amount of reduced silver as well as the silver particle size distribution (in good agreement with transmission electron microscopy images). The presence of a majority of silver nanoparticles is further characterized by means of X-ray diffraction and X-ray Absorption Spectroscopy at the silver K edge.

VL - 118 IS - 43 ER -