Surface adsorption in strontium chloride ammines

Andreas L. Ammitzbøll, Steen Lysgaard, Agata Klukowska, Tejs Vegge, Ulrich J. Quaade

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An adsorbed state and its implications on the ab- and desorption kinetics of ammonia in strontium chloride ammine is identified using a combination of ammonia absorption measurements, thermogravimetric analysis, and density functional theory calculations. During thermogravimetric analysis, ammonia desorption originating from the adsorbed state is directly observed below the bulk desorption temperature, as confirmed by density functional theory calculations. The desorption enthalpy of the adsorbed state of strontium chloride octa-ammine is determined with both techniques to be around 37-39 kJ/mol. A simple kinetic model is proposed that accounts for the absorption of ammonia through the adsorbed state.
Original languageEnglish
JournalJournal of Chemical Physics
Issue number16
Pages (from-to)164701
Number of pages6
Publication statusPublished - 2013

Bibliographical note

Copyright (2013) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Chem. Phys. 138, 164701 (2013) and may be found at


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