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Hydrogen absorption and desorption properties of a novel ScNiAl alloy

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Abstract

A new hydrogen absorbing material has been discovered, ScNiAl, which can store 1.5 wt.% hydrogen reversibly. In this compound, hydrogen absorption is a two-step process; solid solution of hydrogen at temperatures below 180°C and decomposition into ScH2 and NiAl at higher temperatures. Detailed analysis of the hydrogen absorption/desorption has been performed using in situ synchrotron radiation powder X-ray diffraction and thermal desorption spectroscopy. The apparent activation energy for hydrogen desorption was determined to be 182 kJ/mol and the material is stable during cycling.

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Authors and Affiliations

  1. Department of Materials Chemistry, Uppsala University, Uppsala, Sweden

    Adam Sobkowiak, Jonas Ångström & Martin Sahlberg

  2. Center for Energy Materials, Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Aarhus C, Denmark

    Thomas Kollin Nielsen & Torben R. Jensen

  3. MAX-lab, Lund University, 22100, Lund, Sweden

    Yngve Cerenius

Authors
  1. Adam Sobkowiak
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  2. Jonas Ångström
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  3. Thomas Kollin Nielsen
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  4. Yngve Cerenius
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  5. Torben R. Jensen
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  6. Martin Sahlberg
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Corresponding author

Correspondence to Martin Sahlberg.

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Sobkowiak, A., Ångström, J., Nielsen, T.K. et al. Hydrogen absorption and desorption properties of a novel ScNiAl alloy. Appl. Phys. A 104, 235–238 (2011). https://doi.org/10.1007/s00339-010-6116-z

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  • DOI: https://doi.org/10.1007/s00339-010-6116-z

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