Approximate van’t Hoff plots for several reversible and nonreversible hydrides [20, 37, 43, 44, 83, 84]. The compounds in the lower left (shaded) region are stable while the compounds in the upper right are unstable or metastable at ambient pressure and temperature. The box represents the thermodynamic target for “on-board reversible” hydrides. Reproduced by permission of The Royal Society of Chemistry [94].
