Surface-Modified AB_5 Alloys with Enhanced Flydrogen Absorption Kinetics

摘要

Surface engineering approaches were adopted in the preparation of advanced materials based on "low-temperature" AB_5 hydride-forming intermetallide. The approaches used included micro-encapsulation with palladium, as well as with palladium-containing mixed coatings. The influence of these modifications on surface morphology and hydro-genation characteristics of the material were investigated. It was found that palladium-nickel encapsulation improves the hydrogenation kinetics of the intermetallide in the absorption of hydrogen at low pressure and room temperature, and after long-term pre-exposure to air. The developed surface-modified materials may potentially find their application in highly-selective hydrogen extraction and purification processes.