Review Article

Atoms and Nanoparticles of Transition Metals as Catalysts for Hydrogen Desorption from Magnesium Hydride

Table 3

Evaluated values of the half-reaction time ( ) at T = 623 K, order of reaction (n), activation energy (Ea), and pre-exponential factor (A) of pure and TM-doped (TM: Nb, Fe, and Zr + Fe) MgH2 samples.

Sample (s) (kJ mol-1 H)A (s-1)

Pure Mg3250 ± 504141 ± 5 108
Mg + 5 at.% Nb110 ± 10151 ± 5 102
Mg + 1 at.% Nb290 ± 101.578 ± 5 104
Mg + 5 at.% Fe100 ± 10151 ± 5 102
Mg + (Fe-Zr)70 ± 101.594 ± 5 108