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

摘要：

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 Zr1xHfxCo alloy increases obviously with increasing Hf content while it changes little with increasing Sc content for Zr1xScxCo 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 H for Zr1xHfxCo alloy decreases with increasing Hf content but increases with increasing Sc content for Zr1xScxCo alloy,which are coincident with their dehydrogenation property.The maximal hydrogen storage capacity of both Zr1xHfxCo and Zr1xScxCo alloy at room temperature are high enough.

关键词： hydrogen storage alloy ZrCo Zr1-xHfxCo Zr1-xScxCo intermetallic compound

作者: TAN Gong-li LIU Xiao-peng JIANG Li-jun WANG Shu-mao LI Zhi-nian LI Hua-ling

作者单位: General Research Institute for Nonferrous Metals,Beijing 100088,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）