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

Published online by Cambridge University Press:  18 May 2012

Jianjiang Hu ,
Raiker Witter ,
Shuhua Ren  and
Maximilian Fichtner
Jianjiang Hu
Affiliation:
Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
Raiker Witter
Affiliation:
Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany Technomedicum, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
Shuhua Ren
Affiliation:
Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
Maximilian Fichtner
Affiliation:
Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
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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.

Keywords

catalyticCekinetics
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1441: Symposium P – Advanced Materials and Nanoframeworks for Hydrogen Storage and Carbon Capture , 2012 , mrss12-1441-p06-01
Copyright
Copyright © Materials Research Society 2012

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