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Theoretical investigation of catalysed MgH2
Department of Physics, University of Uppsala.
Department of Physics, University of Uppsala.
Department of Physics, Virginia Commonwealth University, Richmond.
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2006 (English)Conference paper, Presentation (Refereed)
Abstract [en]

MgH2 has attracted much attention for being a good hydrogen storage material due to its light weight, low manufacturing cost and high storage capacity (7.6 wt%). But its slow absorption/desorption kinetics and high dissociation temperature (nearly 300 C) limit its practical applications for hydrogen storage. To overcome this, much effort has been paid mainly by making nanocrystalline Mg and/or by adding alloying elements. In this work, we provide a theoretical investigation of the electronic and structural properties of pure and M-doped MgH2 (with M=Sc, Ti, V, Fe, Ni, Al). We have made calculations for both the crystalline state and 1.0 nm particles. The self-consistent total energy calculations are performed within density functional theory using the VASP package for crystals and TURBOMOLE package for clusters. One aim of this study is to see if the alloying elements can weaken the Mg-H bonds, resulting in improved thermodynamics and faster kinetics. Another one is to understand the differences in the thermodynamics of clusters and crystals

Place, publisher, year, edition, pages
2006.
Identifiers
URN: urn:nbn:se:ltu:diva-39791Local ID: eaab5985-d4b8-4bb5-84f9-c5b9176e6d8dOAI: oai:DiVA.org:ltu-39791DiVA: diva2:1013309
Conference
APS March Meeting : 13/03/2006 - 17/03/2006
Note
Upprättat; 2006; 20131030 (andbra)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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