抄録
Air exposure of LaNi5, which yields the growth of surface oxide layer, results in the decreased H2 absorption rate and the accelerated pulverization of the sample at the subsequent hydriding cycles. Recently effect of alkaline pretreatment and/or of Pd catalysis addition onto the LaNi5 powder were reported. Accelated molecular dessociation on the oxide surface by these treatments improve the absorption kinetics drastically even after significant oxidation.
In this report the effect of these treatments on the sample pulverization was investigated. The existence of surface alkaline hydroxide (LiOH) layer accelerated the pulverization, while no difference was observed at the addition of Pd catalysis.
