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


  • This work was partially supported by General Motors Fuel Cell Activities in addition to the basic funding by the Max-Planck-Gesellschaft. We would also like to acknowledge the input of the other members of the hydrogen storage team, J. M. Bellosta von Colbe, J. Kornatowski, M. Mamatha, W. Schmidt, G. Streukens, C. Weidenthaler, and B. Zibrowius. Supporting Information is available online from Wiley InterScience or from the author.


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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.