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Hydrogen-storage properties of a Mg-based mixture prepared by reactive mechanical grinding with ultrafine Fe2O3 particles and Ni |
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| Authors: | MyoungYoup Song SungNam Kwon Seong-Hyeon Hong ChanGi Park SungHwan Baek HyoSuk Kim Daniel R Mumm Jong-Soo Bae |
| Affiliation: | aDivision of Advanced Materials Engineering, Research Center of Advanced Materials Development, Engineering Research Institute, Chonbuk National University, 664-14 1ga Deogjindong Deogjingu, Jeonju, Chonbuk 561-756, Republic of Korea bPowder Materials Research Center, Korea Institute of Machinery & Materials, 66 Sangnamdong, Changwon, Kyungnam 641-010, Republic of Korea cDepartment of Chemical Engineering and Materials Science, University of California, Irvine, CA 92697-2575, USA |
| Abstract: | The sample Mg-10 wt.% (Fe2O3, Ni) was prepared by grinding Mg mechanically under H2 (reactive mechanical grinding) with ultrafine Fe2O3 particles and Ni particles. The sample Mg-10 wt.% (Fe2O3, Ni) as milled absorbed 4.24 wt.% hydrogen at 593 K under 12 bar H2 for 60 min. Its activation was accomplished only by one hydriding–dehydriding cycle. The activated sample absorbed 4.05 wt.% hydrogen at 593K, 12 bar H2 for 60 min and desorbed 3.05 wt.% hydrogen at 593 K, 1.0 bar H2 for 60 min. After hydriding–dehydriding cycling, Fe2O3 was reduced, Mg2Ni was formed by the reaction of Mg with Ni, and a small fraction of Mg was oxidized. |
| Keywords: | H2-sorption properties of Mg Addition of ultrafine Fe2O3 and Ni Reactive mechanical grinding Reduction of Fe2O3 Mg2Ni formation Oxidation of Mg Catalytic role of Mg2NiH4 for the decomposition of MgH2 |
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