title: Hydrogenation of nanocrystalline Mg at room temperature in the presence of TiH(2).
abstract: Magnesium and magnesium-based alloys are considered attractive candidates as rechargeable hydrogen storage materials because of their high hydrogen storage capacities (theoretically up to 7.6 wt %), reversibility, and low cost. In this work, the hydrogenation of nanocrystalline magnesium at room temperature in the presence of TiH(2) was studied. The magnesium was derived by dehydrogenation of nanostructured MgH(2)-0.1TiH(2) prepared by using an ultra-high-energy and high-pressure planetary milling technique. Significant uptake of hydrogen by magnesium at room temperature was observed. The results demonstrate that the nanostructured MgH(2)-0.1TiH(2) system is superior to undoped nano- or micrometer-scaled MgH(2) with respect to the hydrogenation properties of magnesium at room temperature. This finding is potentially useful for a range of energy applications including mobile or stationary hydrogen fuel cells, cooling medium in electricity generation, and differential pressure compressors.
authors.affiliation: Department of Metallurgical Engineering, University of Utah, 135 South 1460 East, Room 412, Salt Lake City, Utah 84112-0114, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Lu
authors.forename: Young Joon
authors.initials: YJ
authors.lastname: Choi
authors.forename: Zhigang Zak
authors.initials: ZZ
authors.lastname: Fang
authors.forename: Hong Yong
authors.initials: HY
authors.lastname: Sohn
authors.forename: Ewa
authors.initials: E
authors.lastname: Rönnebro