Dehydrogenation characteristic of Zr1-xMxCo (M=Hf, Sc) alloy

作者：Tan Gong li; Liu Xiao peng^*; Jiang Li jun; Wang Shu mao; Li Zhi nian; Li Hua ling

来源：Transactions of Nonferrous Metals Society of China, 2007, 17: S949-S953.

• hydrogen storage alloy
• ZrCo
• Zr1-xHfxCo
• Zr1-xScxCo
• intermetallic compound

The intermetallic compound Zr1-xHfxCo and Zr1-xScxCo (x=0, 0.1, 0.2, 0.3) were prepared and their suitability for hydrogen storage was investigated. The alloys show single cubic phase identical with ZrCo by X-ray diffraction. Pressure-composition-temperature(PCT) measurement results show that the equilibrium dehydrogenation pressure of Zr1-xHfxCo alloy increases obviously with increasing Hf content while it changes little with increasing Sc content for Zr1-xScxCo alloy. The dehydrogenation temperatures for supplying 100 kPa hydrogen are about 673, 627, and 650 K for ZrCo, Zr0.7Hf0.3Co and Zr0.7Sc0.3CO alloy, respectively. Thermodynamics calculation results indicate that dehydrogenation Delta H for Zr1-xHfxCo alloy decreases with increasing Hf content but increases with increasing Sc content for Zr1-xScxCo alloy, which are coincident with their dehydrogenation property. The maximal hydrogen storage capacity of both Zr1-xHfxCo and Zr1-xScxCo alloy at room temperature are high enough.

• 出版日期2007-11
• 单位北京有色金属研究总院