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Journal of Chemistry
Volume 2016, Article ID 2152180, 9 pages
Research Article

Effect of Water Adsorption on Cation-Surface Interaction Energy in the Na-Mordenite of 5.5 : 1 Si/Al Ratio

Laboratoire de Chimie-Physique, Unité de Formation et de Recherche en Sciences des Structures de la Matière et Technologie (UFR-SSMT), Université FHB de Cocody-Abidjan, 22 BP 582, Abidjan 22, Côte d’Ivoire

Received 2 October 2015; Accepted 18 January 2016

Academic Editor: Talhi Oualid

Copyright © 2016 Sekou Diaby. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The mobility of the Na+ cations localized at the inner surface of the studied mordenite zeolite depends on the material surface properties. In this work, we show that the activation energy, , relating to the Na+ cation hopping displacement is associated to the surface potential and therefore can be used to get a better insight into the zeolite surface properties. Indeed, when molecules as water are adsorbed at the surface, they modify the surface potential energy and hence influence the value of . If the adsorbed molecules are polar they directly interact with the cations which become more mobile. The more the value is, the less the amount of adsorbed water molecules is. Alterations of the value with respect to the amount of adsorbed water molecules are interpreted using the Dubinin model which is based on simple adsorption principle.