| Materials Science & Chemical Engineering |
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| Hydrogen storage properties of ball-milled Mg-based composite with PdCl2 additive |
| WANG Xiu-li, TU Jiang-ping, ZHANG Pei-long, ZHAO Xin-bing |
| Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Mg-25 wt% Mg2Ni composite was prepared by sintered method, hydrided at 613 K and then ball-milled with 1.5 wt% PdCl2 additive for 51 h. The effects of PdCl2 on the hydriding and dehydriding behavior of Mg-25 wt% Mg2Ni composite were investigated. The absorption and desorption rate of the composite with PdCl2 is fast and the hydrogen storage capacity is more than that of the composite without PdCl2. The maximum hydrogen storage capacity reached 3.48 wt% at 373 K, and 5.05 wt% H at 453 K, respectively. The improvement of sorption and desorption kinetics is attributed to the catalytic effect of PdCl2, and the grain refining and lattice strain introduced by ball milling.
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Received: 05 February 2007
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