| Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO／Al2O3 composites |
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| 引用本文： | Wang XL,Tu JP,Chen CP,Zhang XB,Zhao XB. Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO／Al2O3 composites[J]. Journal of Zhejiang University. Science. B, 2005, 6(3): 208-212 |
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| 作者姓名： | Wang XL Tu JP Chen CP Zhang XB Zhao XB |
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| 作者单位： | Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China,Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China,Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China,Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China,Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China |
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| 基金项目： | Project (No. TG20000264-06) supported by the Special Funds forMajor States Basic Research Project of MOST, China |
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| 摘 要： | INTRODUCTION Mg-based alloys are considered as potentialcandidates for hydrogen storage materials because oftheir large hydrogen capacity (Reilly and Wiswall,1968; Pedersen and Larsen, 1993). However, asMg-based alloys desorb hydrogen at temperatureshigher than 600 K, they are not applicable to practicaluse. Many researches have studied to improve hy-driding/dehydriding kinetics and to lower the workingtemperature (Wang et al., 2002; Tsushio et al., 1998;Spassov and K?ster, 1998; Orim…
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| 关 键 词： | Mg2Ni0.8Cr0.2-CoO／Al2O3 合成物 镁镍基化合物 储氢合金 球磨机 催化剂 |
Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO/Al2O3 composites |
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| Wang Xiu-Li,Tu Jiang-Ping,Chen Chang-Pin,Zhang Xiao-Bin,Zhao Xin-Bing. Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO/Al2O3 composites[J]. Journal of Zhejiang University. Science. B, 2005, 6(3): 208-212 |
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| Authors: | Wang Xiu-Li Tu Jiang-Ping Chen Chang-Pin Zhang Xiao-Bin Zhao Xin-Bing |
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| Affiliation: | Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China. |
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| Abstract: | Mg2Ni0.8Cr0.2-x wt.% CoO/Al2O3 (x=0.5, 1, 2 and 3) composites were prepared by mechanically milling sintered Mg2Ni0.8Cr0.2 alloy and CoO/Al2O3 compound for 45 h. The addition of CoO/Al2O3 compound resulted in the good kinetics properties of hydriding/dehydriding reaction of the composites. The composite with 1.0 wt.% CoO/Al2O3 catalyst could reach the maximum hydrogen absorption capacity (2.9 wt.%) within 5 min at 393 K under H2 pressure of 4 MPa, and can desorb rapidly at 493 K. The decomposition and synthesis of hydrogen molecule on Mg2Ni0.8Cr0.2 alloy surface was promoted by addition of CoO/Al2O3 catalyst. In addition, the formation of metallic Ni particles, strain and defects during the ball milling process also resulted in the improved hydrogenation performance of Mg2Ni-based alloys. |
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| Keywords: | Mg2Ni-based composite Hydrogen storage Ball milling Catalyst Hydriding/dehydriding kinetics |
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