Journal of Materials Science

, Volume 41, Issue 19, pp 6403–6408

An investigation of the effect of Ti, Pd and Zr on the dehydriding kinetics of MgH2

Authors

    • Pure and Applied ChemistryUniversity of Strathclyde
  • P. Honnor
    • Pure and Applied ChemistryUniversity of Strathclyde
  • P. J. Hall
    • Chemical and Process EngineeringUniversity of Strathclyde
  • S. Morris
    • Structures and Materials Centre-A7QinetiQ Ltd.
  • S. B. Dodd
    • Structures and Materials Centre-A7QinetiQ Ltd.
Article

DOI: 10.1007/s10853-006-0732-1

Cite this article as:
Berlouis, L.E.A., Honnor, P., Hall, P.J. et al. J Mater Sci (2006) 41: 6403. doi:10.1007/s10853-006-0732-1

Abstract

The effect of additives Ti, Pd and Zr on the rate of hydrogen desorption from MgH2 is investigated using high-pressure differential scanning calorimetry. Van’t Hoff analysis as well as X-ray powder diffraction measurements confirm that no new intermetallic phases are formed in these systems but enhanced dehydriding kinetics are obtained in the presence of Pd and Zr. For the Mg–Zr composite, Zr precipitates are formed throughout the material on heating to 500 °C but these do not grow with further thermal cycling. The desorption rate for all the composites was found to increase with temperature as well as pressure difference between experimental and equilibrium pressures. A value of 114 ± 4 kJ mol−1 was obtained for the activation energy for dehydriding of the Mg–Ti–Pd composite.

Copyright information

© Springer Science+Business Media, LLC 2006