Effects of metal-based additives on dehydrogenation process of 2NaBH4 + MgH2 system

Insights into an Amorphous NiCoB Nanoparticle-Catalyzed MgH2 System for Hydrogen Storage

“…It is worth noting that the MgB 2 and Mg 2 Ni/Mg 2 NiH 4 phases appeared after ball milling, and in the subsequent cycle, MgB 2 and the transition between Mg 2 Ni and Mg 2 NiH 4 were also observed (Figure S2). It means that NiCoB experienced partial decomposition in the milling process, reacting with MgH 2 to form MgB 2 and Mg 2 NiH 4 …”

“…It means that NiCoB experienced partial decomposition in the milling process, reacting with MgH 2 to form MgB 2 and Mg 2 NiH 4 . 49 Furthermore, TEM, HRTEM, and energy-dispersive X-ray spectroscopy (EDS) observations were executed for the MgH 2 + 9 wt % NiCoB composite to check the microstructural morphology. Figure 7a shows that the particle size of MgH 2 + 9 wt % NiCoB was in the range of 200−500 nm, with larger particles formed due to the polymerization of smaller particles.…”