Hydrogen Sorption Properties of a Novel Refractory Ti-V-Zr-Nb-Mo High Entropy Alloy

High entropy alloys belong to a new and promising class of functional materials for solid-state hydrogen storage. In this context, novel single-phase body centered cubic (bcc) high alloy Ti0.30V0.25Zr0.10Nb0.25Mo0.10 was prepared. The physicochemical sorption properties have been determined by both laboratory large-scale facilities. This can quickly absorb up 2.0 H/M (2.8 wt.%) at room temperature forms face (fcc) hydride, as proven synchrotron X-ray diffraction. Pressure–Composition Isotherm in situ neutron diffraction during hydrogen/deuterium desorption reaction suggest that the experiences reversible single step phase transition (bcc↔fcc). PDF analysis from total scattering data points out hydride possesses an average fcc structure with random atoms distribution small lattice distortion. Despite initial fading capacity, withstands 20 absorption/desorption cycling without decomposition, demonstrated kinetic measurements coupled microstructural study SEM-EDS. Moreover, complete absorption occurs less than 30 s improves cycling.