Abstract

The addition of LaNi 5 allows a considerable increase in the hydrogenation rate of magnesium according to Tanguy et al. [ Mater. Res. Bull. 11, 1441 (1976)]. The rate-controlling step was determined by comparing their empirical results with the rate equations of each step of the kinetic hydriding model established earlier. The initial rate of the reaction is controlled by the step involving hydrogen adsorption on the metal surface after which the rate-controlling step changes to the diffusion of hydrogen through the hydride phase.

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