2024-03-19T12:32:50Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1134992022-03-24T11:13:39Zcom_10261_66com_10261_3col_10261_319
00925njm 22002777a 4500
dc
Ponthieu, M.
author
Fernández, J. F.
author
Cuevas, Fermín
author
Bodega, J.
author
Ares, José R.
author
Adeva, Paloma
author
Sánchez, C.
author
2014
© 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. Mg6(Pd,TM) (TM = Ag, Cu and Ni) pseudo-binary compounds have been synthesized at the TM solubility limit to determine the influence of TM on the thermodynamics and reaction pathways of the Mg6Pd-H system. All compounds exhibit a two-plateau pressure behaviour, being the value of the high plateau pressure well above that of the Mg/MgH2 system. Such destabilization is explained by the formation of different Mg-(Pd,TM) intermetallics and/or Mg2NiH4 hydride phases during the hydrogenation reaction. The formation of these phases not only increases the enthalpy of hydrogenation but also enhances disorder leading to a limited destabilization of the hydrogenated state. This compensation effect is characterized by a linear correlation between enthalpy and entropy terms. In addition, this work also provides the assessment at 623 K of the ternary Mg-Pd-Cu phase diagram in the Mg-rich corner.
International Journal of Hydrogen Energy 39 (32): 18291-18301 (2014)
http://hdl.handle.net/10261/113499
10.1016/j.ijhydene.2014.09.034
Metal hydrides
Thermodynamic properties
Mg-based intermetallics
Hydrogen storage
Thermodynamics and reaction pathways of hydrogen sorption in Mg6(Pd,TM) (TM = Ag, Cu and Ni) pseudo-binary compounds