Quasifree Mg-H thin films
Baldi Coll, Antoni. (Vrije Universiteit Amsterdam)
Palmisano, V. (Vrije Universiteit Amsterdam)
González Silveira, Marta (Universitat Autònoma de Barcelona. Departament de Física)
Pivak, Y. (Vrije Universiteit Amsterdam)
Slaman, M. (Vrije Universiteit Amsterdam)
Schreuders, H. (Vrije Universiteit Amsterdam)
Dam, B. (Delft University of Technology. DelftChemTech)
Griessen, R. (Vrije Universiteit Amsterdam)
American Physical Society

Date:	2009
Abstract:	The thermodynamics of hydrogen absorption in Pd-capped Mgfilms are strongly dependent on the magnesium thickness. In the present work, we suppress such dependency by inserting a thin Ti layer between Mg and Pd. By means of optical measurements, we show that the surface energy contribution to the destabilization of MgH2 is negligible. The inserted Ti layer prevents Mg-Pd alloy formation at the Mg/Pd interface, leading to quasifree Mgfilms and enhancing the kinetics of hydrogen desorption. Our observations are important for the development of thin film devices.
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Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Magnesium ; Hydrogen storage ; Metallic thin films ; Elasticity ; Thermodynamic properties ; Desorption ; Sputter deposition ; Thin films ; Enthalpy ; Solution thermodynamics
Published in:	Applied physics letters, Vol. 95, Issue 7 (August 2009) , p. 071903/1-071903/3, ISSN 1077-3118

DOI: 10.1063/1.3210791

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