Abstract
The slow hydrogenation/dehydrogenation kinetics and high thermodynamic stability of MgH bond are the two major limitations for large-scale utilization of MgH2. Constructing Mg nanoparticles (NPs) with large specific surface area and short hydrogen diffusion distance and adding effective catalysts to facilitate the sorption kinetics are the main ways to solve the remained shortages of Mg/MgH2 system. This article reviews the recent advances in the Mg-based nanocomposites with multiple catalysts produced by different approaches. The multiple catalysts was classified into transition metals and/or their hydrides (TM and/or TMH), TM together with metal oxides, TM and/or TMH together with metal hadlies, TM and/or TMH together with metal sulfides, TM and/or TMH together with Mg2M and other multiple catalysts systems. Compared with single catalyst, the multiple catalysts display enhanced synergistic catalytic effects on the hydrogen absorption and desorption rates.
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