Abstract: A hydrogen storage composition comprises a particulate alloy comprising grains of magnesium, wherein the grain boundaries contain phases comprising nickel and at least one non-nickel transition metal, wherein the nickel is present at levels of ?5 wt % based on the composition as a whole, and wherein the at least one non-nickel transition metal is present at levels of ?0.5 wt % based on the composition as a whole.

Abstract: A hydrogen supply system (FIG. 1) comprises a first hydrogen storage material (1), which may be an AB5 type material, and a second hydrogen storage material (2) which may be a MgH2 type material; wherein the two hydrogen stores are separate. The first hydrogen storage material can be activated to release hydrogen at a lower temperature than can the second hydrogen storage material and at least a proportion of the hydrogen released from the first hydrogen storage material is utilised to activate the second hydrogen storage material. Hydrogen released from the second hydrogen storage material is made available to a hydrogen consumption system (3). The system is particularly suited for use as a mobile hydrogen supply, for example to provide hydrogen to a fuel cell powered vehicle.

Abstract: A process for the manufacture of a hydrogen storage material comprises comminuting a source of magnesium under a reducing atmosphere for a time sufficient to produce particles of a required particle size and crystallite size. At least one reducible PGM compound is introduced and substantially reduced during comminution such that it is distributed substantially at the surface of the particles.