Advanced Hydrogen‐Storage Materials Based on Sc‐, Ce‐, and Pr‐Doped NaAlH4

The most favorable dopants for solid‐state hydrogen‐storage materials are still considered to be compounds of titanium in spite of intensive research on other catalysts. Here, we show that NaAlH4 doped with ScCl3 is a highly efficient dopant, both with respect to storage capacity and kinetics: 2 mol % ScCl3 exhibits a nearly theoretical hydrogen‐storage capacity (4.9 wt %, see graph). Other rare‐earth metal trichlorides are also investigated.