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Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH4

  • Jianjiang Hu (a1), Raiker Witter (a1) (a2), Shuhua Ren (a1) and Maximilian Fichtner (a1)

Abstract

Cerium in various chemical forms was introduced into NaAlH4 to study the hydrogen sorption properties of the resulted material. Although all the Ce precursors tested in this work resulted in a reversible hydrogen storage material, an immediate enhancement in the desorption kinetics could be achieved by a heating treatment, resulting in the in situ formation of cerium aluminide (CeAl4) in the material. While the use of CeAl4 instead of CeCl3 can increase the hydrogen capacity by bypassing the formation of the ineffective NaCl, the highest capacity of 4.9 wt% was obtained from NaAlH4 doped directly with commercial metallic cerium, which may provide a much simplified process for a possible up-scaling preparation of this hydrogen storage material.

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Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH4

  • Jianjiang Hu (a1), Raiker Witter (a1) (a2), Shuhua Ren (a1) and Maximilian Fichtner (a1)

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