Improvement in H-sorption kinetics of MgH powders by using Fe nanoparticles generated by reactive FeF addition

• DOI: 10.1016/j.scriptamat.2004.12.020
• Publication Date: 2005-01-25T14:49:35Z
• Authors: A YAVARI; A LEMOULEC; F DECASTRO; S DELEDDA; O FRIEDRICHS; W BOTTA; G VAUGHAN; T KLASSEN; A FERNANDEZ; A KVICK
• Keywords: Fluorine

Abstract We report the development of new nanostructured MgH2 composites in which fluorine and TM catalysts are introduced through the addition of TM fluorides such as FeF3. A fluorine transfer reaction then occurs to generate protective MgF2 plus Fe nanoparticles catalyst. The powders show sharply accelerated H-sorption kinetics at 300 °C. H-sorption at rates acceptable for applications can be obtained at temperatures much lower than those reported for MgH2 with other catalysts without significant loss of capacity.