Dual tuning of the de-/hydrogenation thermodynamics and kinetics of the Mg–Ni alloy by introducing the Ag–H bond: enhanced hydrogen storage properties at moderate temperatures

The onset dehydrogenation temperature of Mg 85 Ni 14.8 Ag 0.2 reduces to 178 °C due to the enhanced hydrogen pumping effect of Mg 2 NiH 4 by adjusting the Ni–H bond.