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The effect of La on Al/NaBH 4  hydrolysis was elaborated in the present paper. Hydrogen generation amount increases but hydrogen generation rate decreases with La content increasing. There is an optimized composition that Al-15 wt% La-5 wt% NiCl 2 /NaBH 4  mixture (Al-15 wt% La-5 wt% NiCl 2 /NaBH 4  weight ratio, 1 : 3) has 126 mL g −1  min −1  maximum hydrogen generation rate and 1764 mL g −1  hydrogen generation amount within 60 min. The efficiency is 88%. Combined with NiCl 2 , La has great effect on NaBH 4  hydrolysis but has little effect on Al hydrolysis. Increasing La content is helpful to decrease the particle size of Al-La-NiCl 2  in the milling process, which induces that the hydrolysis byproduct Ni 2 B is highly distributed into Al(OH) 3  and the catalytic reactivity of Ni 2 B/Al(OH) 3  is increased therefore. But hydrolysis byproduct La(OH) 3  deposits on Al surface and leads to some side effect. The Al-La-NiCl 2 /NaBH 4  mixture has good stability in low temperature and its hydrolytic performance can be improved with increasing global temperature. Therefore, the mixture has good safety and can be applied as on board hydrogen generation material.

Hydrogen Generation from Al-NiCl2/NaBH4Mixture Affected by Lanthanum Metal

Hydrogen Generation from Al-NiCl₂/NaBH₄Mixture Affected by Lanthanum Metal