Neutron diffraction study of the Pd

M. Catti, O. Fabelo, A. Filabozzi, A. Pietropaolo, S. Tosti, A. Pozio, A. Santucci

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Abstract

Experiments of deuterium absorption/desorption were performed on a foil of Pd77Ag23(wt%) alloy in the 78–196��C temperature and 1–4�bar pressure ranges under the neutron beam at ILL (Grenoble). Powder diffraction patterns were collected on the D1B diffractometer (λ�=�1.2871��) on the Pd0.772Ag0.228Dνdeuterated alloy, and the face-centred-cubic structure was Rietveld-refined locating the D atom in the octahedral site with a variable occupancy ν (=D/M ratio). The results of ν(T) curves at different p(D2) pressures are discussed in comparison with literature data on H and D absorption into Pd[sbnd]Ag alloys from thermodynamic measurements. A negative deviation from predictions of Sieverts' law is shown by the dependence of D occupancy on pressure. This effect relates the behaviour of the activity coefficient γDto D–D and D–M interactions in the solid solution phase.
Original languageEnglish
Pages (from-to)6787 - 6792
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number10
DOIs
Publication statusPublished - 9 Mar 2017

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Catti, M., Fabelo, O., Filabozzi, A., Pietropaolo, A., Tosti, S., Pozio, A., & Santucci, A. (2017). Neutron diffraction study of the Pd. International Journal of Hydrogen Energy, 42(10), 6787 - 6792. https://doi.org/10.1016/j.ijhydene.2017.01.130