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Influence of Boron, Single-layer Graphene and Multi-layer Graphene on Hydrogen Storage Property of Mg-Al Alloy |
Xiantun HUANG( ), Peilin QING, Weihe SHI |
Department of Materials Science and Engineering, Baise College, Baise 533000, China |
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Cite this article:
Xiantun HUANG, Peilin QING, Weihe SHI. Influence of Boron, Single-layer Graphene and Multi-layer Graphene on Hydrogen Storage Property of Mg-Al Alloy. Chinese Journal of Materials Research, 2017, 31(12): 931-938.
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Abstract Mg-Al alloy was prepared via mechanical alloying under hydrogen atmosphere protection, and then the influence of doping substance such as: boron (B), single-layer graphene (SG) and multi-layer graphene (MG) (in 5%, mass fraction) respectively on the hydrogen storage property of Mg-Al alloy was investigated systematically. The results show that the prepared alloy is mainly composed of Mg17Al12, while the hydrogen storage performance for the Mg-Al alloy is improved obviously by doping graphene SG and MG respectively. The initial desorption temperature for Mg-Al-5 (SG and MG) alloy is 64 K and 82 K lower than that of the plain Mg-Al alloy (575 K), and correspondingly their dehydrogenation peak temperature was 76 K and 74 K lower. Besides, with the incorporation of SG and MG, the apparent activation energy of the Mg-Al alloy decreases from 328.9 kJ/mol to 231.5 kJ/mol and 289.4 kJ/mol respectively.
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Received: 20 December 2016
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Fund: Supported by Natural Science Foundation of Guangxi Province (No. 2014GXNSFAA118346) and Guangxi Colleges and Universities Key Subject of Material Physics and Chemistry (Baise College) (No. KS16ZD06) |
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