The hydrogen absorption/desorption kinetic properties of MgH₂ can be effectively enhanced by doping specific catalysts. In this work, MOFs-derived NiCu@C nanoparticles (~15 nm) with regular core-shell structure were successfully prepared and introduced into MgH₂ (denoted as MgHNiCu@C). The onset and peak temperatures of hydrogen desorption of MgH₂–11 wt.% NiCu@C are 175.0 ℃ and 282.2 ℃, respectively. The apparent activation energy of dehydrogenated reaction is 77.2 ± 4.5 kJ/mol for MgH₂–11 wt.% NiCu@C, which is lower than half of that of the as-milled MgH₂. Moreover, MgH₂–11 wt.% NiCu@C displays great cyclic stability. The strengthening "hydrogen pumping" effect of reversible solid solutions Mg₂Ni(Cu)/Mg₂Ni(Cu)H₄ is proposed to explain the remarkable improvement in hydrogen absorption/desorption kinetic properties of MgH₂. This work offers a novel perspective for the design of bimetallic nanoparticles and beyond for application in hydrogen storage and other energy related fields.