Abstract

This work is aimed at quantifying mechanochemical effects in reactive solid–gas systems. It deals in particular with the kinetics of H₂ absorption processes on a Mg₂Ni composite under thermal and mechanical activation. In a first series of experiments, powders were exposed to H₂ under static conditions for selected time intervals and successively subjected to mechanical treatment. In a second series, the latter was instead started in coincidence with the exposure of powders to H₂. The effects of mechanical processing on the H₂ absorption processes have been quantified via the accurate description of the absorption kinetics with suitable model curves. A tentative rationalization of experimental observations is proposed.

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