Comparison of hydrogen storage properties of Mg-Ni from different preparation methods

Ranjbar, A., Aminorroaya, S., Guo, Z. P., Cho, Y., Liu, H. K. and Dahle, A. (2011) Comparison of hydrogen storage properties of Mg-Ni from different preparation methods. Materials Chemistry and Physics, 127 1-2: 405-408. doi:10.1016/j.matchemphys.2011.02.033


Author Ranjbar, A.
Aminorroaya, S.
Guo, Z. P.
Cho, Y.
Liu, H. K.
Dahle, A.
Title Comparison of hydrogen storage properties of Mg-Ni from different preparation methods
Journal name Materials Chemistry and Physics   Check publisher's open access policy
ISSN 0254-0584
1879-3312
Publication date 2011-05-16
Sub-type Article (original research)
DOI 10.1016/j.matchemphys.2011.02.033
Open Access Status
Volume 127
Issue 1-2
Start page 405
End page 408
Total pages 4
Place of publication Lausanne, Switzerland
Publisher Elsevier
Language eng
Formatted abstract
In this work, a systematic study on the fabrication of Mg–Ni hydrogen storage materials is presented. Mg–6 wt% Ni base alloys were fabricated by a melting and casting process, and then ball milled by planetary ball milling. As a comparison, a sample of Mg + 6 wt% Ni was also prepared by ball milling pure elemental powders. X-ray diffraction patterns of the cast and ball-milled (BM)-cast samples show the existence of both Mg and Mg2Ni phases, while in the BM-powder sample there are some peaks corresponding to Ni particles. Hydrogen sorption properties of the samples were measured at 200 °C and 250 °C. The thermodynamic behaviour of hydrogenated samples was also investigated by differential scanning calorimetry.

The ball-milled samples show enhanced hydrogen sorption properties in comparison with the cast samples, and ball-milling after casting results in superior hydrogen absorption/desorption properties in comparison with the ball-milled powder. Our discussion demonstrates that by ball-milling after casting, the Ni particles can penetrate into the deeper layers of magnesium particles and show a combination of the catalytic roles in terms of both hydrogen dissociation and hydrogen pumping to the interface between the catalyst and the Mg.
Keyword Hydrogen storage
Nickel
Ball milling
Casting
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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