First principles calculations and experiments to determine the hydrogenation process of Cu-Li-Mg

M. H. Braga, M. H. Sá, J. A. Ferreira, L. L. Daemen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Density Functional Theory (DFT) calculations were performed. They were firstly implemented to optimize the structure and refine the stoichiometry of the only ternary compound, CuLi0.08Mg1.92 of the Cu-Li-Mg system. Furthermore using DFT, several possible structures of CuMg2Hx were optimized. Since most of the hydrides are cubic structures or can be considered as distortions of a cubic structure, we have started calculations for CuMg2Hx (x = 4 - 6) with tetragonal and monoclinic structures, similar to those of the hydrides formed by the nearest neighbors of Cu and Mg in the periodic table: NiMg2H4 and CoMg2H5 (e.g. monoclinic C2/c and tetragonal P4/nmm, respectively). It can be concluded that the most stable configuration corresponds to CuMg2H5 with C2/c structure. We have performed several neutron scattering experiments that are in agreement with the first principles calculations.

Original languageEnglish
Title of host publicationAdvanced Materials Forum VI
EditorsAna Maria Pires Pinto, Antonio Sergio Pouzada
PublisherTrans Tech Publications Ltd
Pages799-804
Number of pages6
ISBN (Print)9783037854938
DOIs
StatePublished - 2013
Externally publishedYes
Event6th International Materials Symposium, Materiais 2011 - Guimaraes, Portugal
Duration: Apr 18 2011Apr 20 2011

Publication series

NameMaterials Science Forum
Volume730-732
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference6th International Materials Symposium, Materiais 2011
Country/TerritoryPortugal
CityGuimaraes
Period04/18/1104/20/11

Keywords

  • Cu-Li-Mg-h
  • Density functional theory (DFT)
  • Neutron scattering
  • Phonons

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