The new ternary intermetallic NdNiMg5: Hydrogen sorption properties and more

Hydrogen generation from Mg NdNiMg15 composites by hydrolysis reaction

“…The MgeNdNiMg 15 composites were prepared using neodymium pieces, nickel rods, and magnesium rods (all purities higher than 99.8%) as starting materials. The details of the synthesis were reported in previous paper for the NdNiMg 5 phase [19]. The hydrolysis reaction was carried out in a salted water solution (3.5 wt % NaCl) and more details can be found in reference [9].…”

Phase Equilibria, Crystal Structure and Hydriding/Dehydriding Mechanism of Nd4Mg80Ni8 Compound

“…The Nd-Mg-Ni ternary compounds are expected to be the hydrogen storage alloys with excellent properties because the uniform composition would leads to in - situ formation of the ultrafine MgH 2 -NdH x -Ni/Mg 2 NiH 4 composites 11 21 26 . From the reported literature and our experimental work, it can be found that there are seven ternary compounds in the Nd-Mg-Ni system: Nd 4 Mg 80 Ni 8 , NdMg 8 Ni, NdMg 5 Ni 27 , NdMg 2 Ni 9 , Nd 2 MgNi 2 28 , NdMgNi 4 29 and NdMg 2 Ni 9 30 .…”

“…In order to compare the hydriding rate of Nd 4 Mg 80 Ni 8 with that of other Nd-Mg-Ni alloys in literatures 12 13 16 18 26 , the calculated results of characteristic reaction time are listed in Table S2 . Figure 6(d) shows the comparison of hydrogen storage capacity and hydriding rate of those alloys at 300 °C.…”

The Mg-Rich Phase NdNiMg15: Structural and Magnetic Properties

“…The Mg-rich corner of many RE-TM-Mg ternary systems (RE = Rare-Earth, TM = Transition Metal) have been also studied for solid hydrogen storage, in order to combine the low weight of magnesium and the catalytic effect of rare-earth and transition metal 13,14,15 . Among these systems one can cite the La-Ni-Mg 15,16 and Nd-Ni-Mg [17][18][19][20][21] systems. The different studies show a decomposition of the intermetallic compounds into MgH2, binary rareearth hydrides (e.g.…”

“…The LPSO phases are long period stacking variants of the structure of hexagonal close-packed (hcp)-Mg and the most frequently observed polytypes crystallizing with a 18R, 14H, or 10H structure. , The RE and Zn atoms are located in some of the layers, and they form Zn 6 RE 8 clusters. The Mg-rich corner of many RE–TM–Mg ternary systems (TM = transition metal) have been also studied for solid hydrogen storage, to combine the low weight of magnesium and the catalytic effect of rare-earth and transition metal. − Among these systems one can cite the La–Ni–Mg , and Nd–Ni–Mg − systems. The different studies show a decomposition of the intermetallic compounds into MgH 2 , binary rare-earth hydrides (e.g., LaH 3 ), and ternary magnesium transition-metal hydrides (e.g., Mg 2 NiH 4 ).…”