Hydrogen sorption properties of V

S. Tosti, A. Santucci, A. Pietropaolo, S. Brutti, O. Palumbo, F. Trequattrini, A. Paolone

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

An alloy with nominal composition V85Ni15was prepared in a vacuum induction melting apparatus. The chemical analysis of the sample showed a V (Ni) content of 82.63 (15.68) at% and small contaminations by carbon and aluminum. XRD measurements confirmed that the bcc Ni-V solid solution phase is the main constituent of the sample. However, a minor impurity (approximately 6.5 wt%) due to the precipitation of the sigma NiV3-xphase is present in the sample. Hydrogen sorption measurements extending from 150 °C up to 400 °C in a wide pressure range (up to 90 bar) were performed. Upon hydrogenation below 250 °C, one observes the subsequent presence of an α phase and of two hydride phases with different values of dehydrogenation enthalpy: ΔHdehydr= 21 ± 1 kJ/mol for 0.15 ≤ H/M ≤ 0.30 and ΔHdehydr= 26 ± 2 kJ/mol for 0.53 ≤ H/M ≤ 0.59. Above 300 °C, there is no evidence of the formation of hydrides and only an α phase is present up to the maximum measured composition, with a hydrogenation enthalpy ΔHhydr= 10.0 ± 0.5 kJ/mol.
Original languageEnglish
Pages (from-to)2817 - 2822
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number5
DOIs
Publication statusPublished - 1 Feb 2018
Externally publishedYes

    Fingerprint

All Science Journal Classification (ASJC) codes

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

Cite this

Tosti, S., Santucci, A., Pietropaolo, A., Brutti, S., Palumbo, O., Trequattrini, F., & Paolone, A. (2018). Hydrogen sorption properties of V. International Journal of Hydrogen Energy, 43(5), 2817 - 2822. https://doi.org/10.1016/j.ijhydene.2017.12.123