In our previous work, TaF
5 and VCl
3 were added to Mg, leading to the preparation of samples with good hydriding and dehydriding properties. In this work, Ni was added together with TaF
5 and VCl
3 to increase the reaction rates
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In our previous work, TaF
5 and VCl
3 were added to Mg, leading to the preparation of samples with good hydriding and dehydriding properties. In this work, Ni was added together with TaF
5 and VCl
3 to increase the reaction rates with hydrogen and the hydrogen-storage capacity of Mg. The addition of Ni together with TaF
5 and VCl
3 improved the hydriding and dehydriding properties of the TaF
5 and VCl
3-added Mg. MgH
2 was also added with Ni, TaF
5, and VCl
3 and Mg-x wt% MgH
2-1.25 wt% Ni-1.25 wt% TaF
5-1.25 wt% VCl
3 (x = 0, 1, 5, and 10) were prepared by reactive mechanical milling. The addition of MgH
2 decreased the particle size, lowered the temperature at which hydrogen begins to release rapidly, and increased the hydriding and dehydriding rates for the first 5 min. Adding 1 and 5 wt% MgH
2 increased the quantity of hydrogen absorbed for 60 min, H
a (60 min), and the quantity of hydrogen released for 60 min, H
d (60 min). The addition of MgH
2 improved the hydriding–dehydriding cycling performance. Among the samples, the sample with x = 5 had the highest hydriding and dehydriding rates for the first 5 min and the best cycling performance, with an effective hydrogen-storage capacity of 6.65 wt%.
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