Characteristics of titanium-based C14-type Laves phase alloys and their hydride electrodes

Abstract The pressure-composition-temperature (PCT) isotherms, lattice parameters and electrode properties of titanium-based Laves phase alloys with various compositions were studied in this work. The as-cast pseudobinary Ti 1-x Zr x Fe 0.15 Mn 1.21-y V 0.64 Ni y alloys ( x = 0–0.2, y = 0–0.6) were found to have the same crystal structure of the C14-type Laves phase by analysis of X-ray diffraction patterns. The equilibrium characteristics of their hydrides obtained by measuring PCT isotherms at 30 °C were attributed to both geometric and electronic factors. The electrode properties of the hydrides were dependent on both the plateau pressure of the PCT curves and the electrocatalytic activity of their alloys.