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Hydrogen storage in 2NaBH4 + MgH2 mixtures: destabilization by additives and nanoconfinement

Mulas, Gabriele Raimondo Celestino and Campesi, Renato and Garroni, Sebastiano and Napolitano, Emilio and Milanese, Chiara and Dolci, Francesco and Pellicer, Eva and Baró, Maria Dolores and Marini, Amedeo (2012) Hydrogen storage in 2NaBH4 + MgH2 mixtures: destabilization by additives and nanoconfinement. Journal of Alloys and Compounds, Vol. 536 (Suppl. 1), S236-S240. eISSN 1873-4669. Article.

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DOI: 10.1016/j.jallcom.2011.12.042

Abstract

We focus on the H2 desorption properties of the 2NaBH4 + MgH2 system destabilized by different methods. Nanostructured powder mixtures were prepared by ball milling the starting hydrides and nanoconfined reactive composites were obtained by melting infiltration of the hydrides into a Si-based SBA-15 support. NbF5 was tested as catalyst in both the preparations.
Structural characterization by X Ray Diffraction and Transmission Electron Microscopy allowed evaluating the successful synthesis of SBA15 matrix, the microstructural features of ball milled and nanoconfined hydrides as well as the success of infiltration process. The evaluation of the sorption properties, by manometric Sievert-type apparatus and thermal desorption spectroscopy, revealed the efficiency of the hydride destabilization, obtained by the different routes, in decreasing the hydrogen release temperature and improving desorption kinetics.

Item Type:Article
ID Code:8688
Status:Published
Refereed:Yes
Uncontrolled Keywords:Hydrogen absorbing materials, metal hydrides, mechanochemical processing nanostructured materials, transmission electron microscopy (TEM), x-ray diffraction
Subjects:Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > INSTM-Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali, Unità di ricerca di Sassari
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
Publisher:Elsevier
eISSN:1873-4669
Deposited On:25 Feb 2013 16:03

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