Significantly improved hydrogen desorption property of La2Mg17 alloy modified with Ni–Al nanocrystalline

A simple method was developed for improving the hydrogen storage properties through adding nano Ni–Al compounds using as a stable catalyst to the La2Mg17 alloys by a PVD method. With the trace addition of the catalyst, hydrogen absorption and desorption rate are all substantially improved for the La–Mg based alloys. The alloys formation process has been determined, and the activity energy of the hydride dehydrogenation reaction before and after Ni–Al nanocrystalline addition was also calculated.

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