Combinatorial synthesis and hydrogenation of Mg/Al libraries prepared by electron beam physical vapor deposition

Gemma Garcia, Roger Doménech-Ferrer, Francesc Pi, Josep Santiso, Javier Rodríguez-Viejo

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26 Citations (Scopus)

Abstract

We have grown thin film libraries of the Mg-Al system using a high-throughput synthesis methodology that combines the sequential deposition of pure elements (Mg and Al) by an electron-beam (e-beam) evaporation technique and the use of a special set of moving shadow masks. This novel mask has been designed to simultaneously prepare four identical arrays of different compositions that will permit the characterization of the same library after several treatments. Wavelength dispersive spectroscopy (WDS) and micro-X-ray diffraction have been used as high-throughput screening techniques for the determination of the composition and structure of every member of the library in the as-deposited state and after hydrogenation at 1 atm of H2 during 24 h at three different temperatures: 60, 80, and 110°C. We have analyzed the influence of the Mg-Al ratio on the hydrogenation of magnesium, as well as on the appearance of complex hydride phases. We have also found that aluminum can act as a catalyzer for the hydrogenation reaction of magnesium. © 2007 American Chemical Society.
Original languageEnglish
Pages (from-to)230-236
JournalJournal of Combinatorial Chemistry
Volume9
DOIs
Publication statusPublished - 1 Mar 2007

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