Hydriding properties of an Mg–Al–Ni–Nd hydrogen storage alloy

This work presents the development of an Mg–Al–Ni–Nd alloy for hydrogen storage purposes. The hydrogen storage properties of the alloy were analyzed using pressure–composition isotherms and hydrogen desorption kinetic curves at different temperatures. The characterization of the microstructures, before and after hydrogenation, was performed using X-ray diffraction, scanning electron microscopy and energy-dispersive spectrometry. Hydrogenation caused significant changes in the alloy microstructure. Two pressure plateaus were observed. The maximum hydrogen storage reversible capacity measured was 4 wt.% at 573 K.