Synthesis and Hydrogen Storage Properties of Mg-Based Complex Hydrides with Multiple Transition Metal Elements.

ABSTRACT: Mg₂TMH_n complex hydrides, where TM represents various combinations of transition metals, were synthesized by reactive ball milling of Mg and TM powders under H₂ pressure. TM was an equimolar mixture of three (Fe, Co, and Ni), four (Mn, Fe, Co, and Ni), or five (Cr, Mn, Fe, Co, and Ni) elements. The Mg/TM ratio was either 2:1 or 3:1. For 2:1 samples, a single fcc hydride phase Mg₂TMH_n with a K₂PtCl₆-type structure was detected by X-ray diffraction along with a residual, unreacted metal phase. By contrast, in samples where the Mg/TM ratio was 3:1, the tetragonal MgH₂ hydride was also observed. The formation of Mg₃TMH_n complex hydrides, previously reported for TM = Cr and Mn under hig

SUBMITTER: Pericoli E 

PROVIDER: S-EPMC12042823 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature