Hydrogen evolution rates (based on 100 kg of material) for the metastable metal hydrides α-AlH3 and LiAlH4 (first step only) compared to catalyzed and uncatalyzed NaAlH4 (first step only) [19, 30, 93]. The dotted line shows the US Department of Energy (DOE) H2 rate target for a 50 kW fuel cell (1 gH2/s).
