ChemInform Abstract: High‐Pressure Synthesis of Novel Hydrides Mg_7‐xA_xTiH_16‐x (A: Li, Na, K; x = 0—1.0) and Their Reversible Hydrogen Storage Properties.

Abstract

.0) and Their Reversible Hydrogen Storage Properties. -The title compounds are prepared by reaction of MgH2, TiH2, and MH (M: Li, Na, K) (8 GPa H2, 873 K, 1 h) and characterized by powder XRD. Addition of LiH and NaH greatly enhances the yield of the Mg7TiH16 phase (space group Fm3m) and improves the reversibility of the hydrogen releasing and insertion reactions. Mg 7-x M x TiH 16-x phases exhibit reversible hydrogen storage capacities of about 3-4 wt.% around 523-573 K. -(TAKASAKI*, T.; MUKAI, T.; KITAMURA, N.; TANASE, S.; SAKAI, T.; J. Alloys