Compositions and synthesis procedures of the investigated samples. Molar weight (M), nominal H-content and average weight loss (Δm) of independent TG-DSC measurements are presented as well as the H loss in percent of the total hydrogen content calculated from ΔTG data (decomposition from RT to 450 °C).
| Sample name | Composition | Procedure | M (g mol−1) | H-content (wt%) | Δm (wt%) | H loss (%) | Sample name after 23 h H → D exchange at 120 °C |
|---|---|---|---|---|---|---|---|
| S1 | γ-Mg(BH4)2 | As received | 53.99 | 14.94 | 13.5 ± 0.3 | 90 ± 2 | S1-D |
| S2 | γ-Mg(BH4)2 | Ball milling | 53.99 | 14.94 | 13.1 ± 0.3 | 87 ± 2 | S2-D |
| S3 | γ-Mg(BH4)2 + 2 mol% Ni3B | Ball milling | 57.73 | 13.97 | 12.3 ± 0.1 | 88 ± 1 | S3-D |
| S4 | γ-Mg(BH4)2 + 2 mol% Nb2O5 | Ball milling | 59.31 | 13.60 | 11.8 ± 0.5 | 86 ± 3 | S4-D |