Two-Fold Materials for Hydrogen Energy Applications: Synthesis and Characterization

In this work, two-fold materials are synthesized and characterized. The materials are designed for applications in both hydrogen gross purification and hydrogen compression. The synthesis unifies steps of the different unitary process to lower costs. (La,Ce,Nd, Pr)Ni5 intermetallics are obtained by mechanical alloying. The structural and hydrogen sorption properties are improved by treatment in Ar. The material is stable from room temperature up to 600 ¡C. This material is applied to a one-stage hydrogen compression scheme. The same material is treated under air. It decomposes at 120 ¡C. As a result, a intimate mixture of oxides is obtained. This product is designed to be applied to hydrogen gross purification. Applications of the materials for the hydrogen technology are discussed along to the structural properties.