Ti cations in sodium alanate

Hydrogen Dynamics in Lightweight Tetrahydroborates

“…Interestingly, the sorption reaction is only reversible under technically applicable conditions, if the material is doped with transition-metal compounds, most efficiently with titanium compounds [68][69][70]. A multitude of experimental and theoretical methods have been applied to unravel the mechanism of the formation and decomposition process of NaAlH 4 -so far without a conclusive model [71][72][73][74][75][76][77][78][79][80][81]. Furthermore, similar effective additives for other complex hydrides e.g.…”

TEM characterization of pure and transition metal enhanced NaAlH4

“…The efforts made to solve this question span over a wide range of experimental techniques, including X-ray diffraction (XRD) [3][4][5][6], neutron diffraction [7], infrared (IR) and Raman spectroscopy [8], anelastic spectroscopy [9], differential scanning calorimetry (DSC) [10,11], electron paramagnetic resonance (EPR) [12], X-ray absorption spectroscopy (XAS) [13][14][15], X-ray photoelectron spectroscopy (XPS) [16][17][18], inelastic and quasielastic neutron scattering [19,20], nuclear magnetic resonance (NMR) [21,22], muon spin rotation (SR) [23], scanning electron microscopy (SEM) [3,18,24], and transmission electron microscopy (TEM) [24][25][26][27][28][29]. In addition, numerous density functional theory (DFT) calculations have studied possible Ti substitution scenarios in the bulk and at the surface of NaAlH 4 [30][31][32][33][34][35][36][37][38].…”

Improved dehydrogenation performance of LiBH4/MgH2 composite with Pd nanoparticles addition

“…3), which is close to the theoretical capacity. The above results obviously show that under the catalyst effect of nano-Pd, the hydrogen can be totally released from LiBH 4 /MgH 2 mixtures as the following formula LiBH 4 + 1/2MgH 2 → LiH + 1/2MgB 2 + 2H 2 (8) To explore structural change during the rehydrogenation process, a sequence of XRD measurements is shown in Fig. 7.…”

“…One of the ways to overcome this difficulty is using high hydrogen content compounds such as MH x (e.g. LiH or MgH 2 ) [4][5][6], amides (NH 2 − ) [7], alanate (AlH 4 − ) [8,9] and borohydride (BH 4 − ) [10][11][12][13][14][15], which possess hydrogen gravimetric capacity >5 wt.%. Among them LiBH 4 has quite high theoretical gravimetric (18.5 wt.%) and volumetric (121 g L −1 ) hydrogen storage capacities, potentially being a superior hydrogen storage material.…”