Structure, hydrogen storage kinetics and thermodynamics of Mg-base Sm5Mg41 alloy

A review on design strategies for metal hydrides with enhanced reaction thermodynamics for hydrogen storage applications

“…Zhang et al designed nonstoichiometric Zr‐based Laves phase alloys to investigate their hydrogenation thermodynamics parameters and hydrogen storage capacities . Yuan et al prepared a Mg‐based Sm 5 Mg 41 alloy via a vacuum induction melting technique to investigate its structural, thermodynamic, and kinetic properties . The alloy was found to follow the mechanism of “Sm 5 Mg 41 + SmMg 3 + H 2 → Sm 3 H 7 + MgH 2 ↔ Sm 3 H 7 + Mg + H 2 ” during the hydrogenation and dehydrogenation processes.…”

Microstructure and hydrogen storage kinetics of Mg89RE11 (RE = Pr, Nd, Sm) binary alloys

“…Among them, adding RE elements attracts extensive interest for the Mg-based alloys due to its excellent improvement of the hydriding/dehydriding rate, which may be a better choice to meet the requirements of future hydrogen energy storage systems. [24][25][26][27][28][29] Therefore, the addition of rare earth elements into Mg-based alloys as alloying elements shed light on the better hydrogen storage properties for alloys. The hydrogen storage capacity of La 2 Mg 17 reaches 6 wt% at the temperature of 350 C. 30 The Mg 3 La compound prepared by induction melting can absorb 2.89 wt% of hydrogen reversibly at 296 C. 31 Wu et al 32 investigated the hydrogen storage properties and phase transitions of Mg 17 Ba 2 , which has reversible hydrogen capacity of 4.0 wt% H 2 .…”

A comparison of TiF3 and NbF5 catalytic effects on hydrogen absorption and desorption kinetics of a ball-milled Mg85Zn5Ni10 alloy

“…Some researches have conrmed that alloying Mg with transition metals such as Ni, [23][24][25] Zn, 26,27 Ti, Cr, Nb, Cu and Fe [28][29][30][31] can enhance the hydrogenation/dehydrogenation rates. Also, some rare earth elements, [32][33][34] intermetallic compounds, 35 metallic oxides, 36,37 and uorides [38][39][40] are proven to have a good catalytic effect on accelerating the storage and release of hydrogen. Yavari et al 41 added FeF 3 into MgH 2 to manufacture nanostructured MgH 2 composites and found that hydrogenation/dehydrogenation rates were clearly enhanced.…”