The widespread of hydrogen-related energies necessitates the production of hydrogen at a large scale and competitive cost. One method of production consists in separating, at high temperature, hydrogen molecules from a gas by means of the permeation technique. Pd-based membranes are currently the most commonly used materials for this application however the price of Pd elements stimulates the search for alternative candidate materials. For that purpose, this study was undertaken to develop new compositions of metallic amorphous alloys with performance at least similar to those of Pd-based membranes. In this paper, we will present the hydrogen permeation properties of Ni-Nb-Zr-Ta amorphous alloy prepared in the form of thin ribbon of about ~30 μm thick. At low temperature, the hydrogen permeability of the Ni-Nb-Zr-Ta alloy was found to be similar to that of Pd-Cu alloy while for temperature larger than 400^oC, the hydrogen permeability decreased slightly. The variation in the properties of the Ni-Nb-Zr-Ta amorphous alloy will be discussed based on microstructural modifications detected by XRD, XPS and TEM analyses.

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