An increasing trend was observed with the extension of milling duration for the same alloy.
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Improved hydrogen storage kinetics of nanocrystalline and amorphous Ce-Mg-Ni-based CeMg<sub>12</sub>-type alloys synthesized by mechanical milling.
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The sentences
The HRD values show an increasing trend at first and then a decreasing trend with the increase in milling duration; the maximum HRD values of the as-milled ( x = 100, 200) alloys are 72.20% and 77.55% respectively, which are nearly equivalent to those of RE-based AB 5 -type alloy electrodes that have exceptional kinetic performances.