X-ray diffraction measurement of the hydrogenation and dehydrogenation of aluminum and characterization of the recovered AlH

Saito, Hiroyuki; Sakurai, Yoko; Machida, Akihiko; Katayama, Yoshinori; Aoki, Katsutoshi

Pristine aluminum was hydrogenated to form AlH at 8.9 GPa and 600 C. The cyclic formation and decomposition of the hydride were measured by synchrotron X-ray diffraction measurement. AlH synthesized under high pressure and temperature was recovered at ambient conditions. The recovered AlH was characterized by the conventional powder X-ray diffraction measurement and Raman spectroscopy. The result of the characterizations was consistent with that obtained for chemically prepared AlH and indicated that single phase -AlH was obtained.