Abstract
The intermetallic compound Zr 1-xTi xCo was prepared and its suitability for hydrogen storage was investigated. The alloys obtained by magnetic levitation melting with the composition of Zr 1-xTi xCo (x =0, 0.1, 0.2 and 0.3, at. %) show single cubic phase by X-ray diffraction. A single sloping plateau was observed on each isothermal, and pressure-composition-temperature (PCT) measurement results show that the equilibrium hydrogen desorption pressure of Zr 1-xTi xCo alloy increases with increasing Ti content. The desorption temperatures for supplying 100 kPa hydrogen are about 665, 642, 621 and 614 K for ZrCo, Zr 0.9 Ti 0.1Co, Zr 0.8Ti 0.2Co and Zr 0.7Ti0.3Co alloy, respectively. Repeated hydrogen absorption and desorption cycles do not generate separated ZrCo, TiCo and ZrH 2 phases, indicating that alloys have good thermal and hydrogen stabilization.
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