Journal
JOURNAL OF MATERIALS SCIENCE
Volume 52, Issue 5, Pages 2392-2399Publisher
SPRINGER
DOI: 10.1007/s10853-016-0533-0
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [51271061, 51571065, 51401055]
- Foundation of Guangxi Educational Committee [2013YB006]
- Guangxi Natural Science [2013GXNSFGA019007]
Ask authors/readers for more resources
Mg-Al alloys were prepared via sintering combined with ball milling, and the effect of a transition metal (TM = Ti, V, Ni) on the hydrogen storage properties of these alloys was investigated; the alloys were characterized via X-ray diffraction, pressure composition isotherms, and differential scanning calorimetry. The results showed that the alloys were mainly composed of Mg and the Mg17Al12 phase, and the cell volume of these phases decreased after the addition of TM (TM = Ti, V, Ni), which is attributed to the improved hydrogenation kinetics of Mg-Al alloy. Moreover, the hydrogenation/dehydrogenation temperature of the Mg-Al alloy decreased with the addition of TM (TM = Ti, V, Ni). Ti, Ni, and V acted as a catalyst, thereby lowering the reaction barrier for dehydrogenation and promoting the reversible hydrogenation reaction of the Mg-Al alloy. The onset temperature of dehydrogenation of the Mg-Al-V alloy was similar to 244 A degrees C, which was 66 A degrees C lower than that of the Mg-Al alloy (similar to 310 A degrees C). And the apparent activation energy of the Mg-Al-V alloy was 80.1 kJ mol(-1), where it was 34.6 kJ mol(-1) lower than that of Mg-Al alloy.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available