High-Pressure Raman and Calorimetry Studies of Vanadium(III) Alkyl Hydrides for Kubas-Type Hydrogen Storage

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

External organisations

  • Science and Sport, University of Glamorgan
  • Hydro Quebec

Abstract

Reversible hydrogen storage under ambient conditions has been identified as a major bottleneck in enabling a future hydrogen economy. Herein, we report an amorphous vanadium(III) alkyl hydride gel that binds hydrogen through the Kubas interaction. The material possesses a gravimetric adsorption capacity of 5.42 wt % H2 at 120 bar and 298 K reversibly at saturation with no loss of capacity after ten cycles. This corresponds to a volumetric capacity of 75.4 kgH2 m-3. Raman experiments at 100 bar confirm that Kubas binding is involved in the adsorption mechanism. The material possesses an enthalpy of H2 adsorption of +0.52 kJ mol-1 H2, as measured directly by calorimetry, and this is practical for use in a vehicles without a complex heat management system.

Details

Original languageEnglish
Pages (from-to)822-828
Number of pages7
JournalChemPhysChem
Volume17
Issue number6
Early online date20 Jan 2016
Publication statusPublished - 16 Mar 2016

Keywords

  • hydrides, hydrogen storage, materials science, Raman spectroscopy, transition metals