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

RANJBAR, A., AMINORROAYA YAMINI, Sima, 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.

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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.

Item Type: Article
Uncontrolled Keywords: Hydrogen storage; Nickel; Ball milling; Casting; Catalytic effects
Research Institute, Centre or Group - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Engineering Research
Identification Number:
Page Range: 405-408
Depositing User: Sima Aminorroaya Yamini
Date Deposited: 25 Jul 2017 16:03
Last Modified: 18 Mar 2021 11:15

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