Superior hydrogen storage properties of Mg95Ni5+10 wt.% nanosized Zr0.7Ti0.3Mn2+3 wt.% MWCNT prepared by hydriding combustion synthesis followed by mechanical milling (HCS+MM)
Superior hydrogen storage properties of Mg95Ni5+10 wt.% nanosized Zr0.7Ti0.3Mn2+3 wt.% MWCNT prepared by hydriding combustion synthesis followed by mechanical milling (HCS+MM)
复制标题
优%20氢%20存储%20性能%20of%20Mg95Ni5%20+%2010%20wt.%%20纳米%20Zr0.7Ti0.3Mn2%20+%203%20wt.%%20MWCNT%20制备%20by%20氢化%20燃烧%20合成%
DOI：
10.1016/j.ijhydene.2012.08.060
复制
发表时间：
2012-11-01
影响因子：
7.2
通讯作者：
Li, Liquan
中科院分区：
文献类型：
--
作者：
Wei, Lingjun;Gu, Hao;Li, Liquan
采用先燃烧合成（HCS）再机械球磨（MM）的方法，并添加纳米Zr 0. 7 Ti 0. 3 Mn 2和MWCNT，可显著提高镁基材料的储氢性能。掺杂10重量%的Mg 95 Ni 5纳米Zr0.7Ti0.3Mn2和3 wt.%通过HCS + MM工艺制备的MWCNT吸收6.07 wt.%在373 K下，第一次解吸循环在100 s内完成，在523 K下，第一次解吸循环在1800 s内完成，解吸率为95.1%。在此条件下，氢容量可达5.58wt.%在423 K下，第10次循环在100 s内。该体系的脱氢活化能为83.7 kJ/mol，远低于原始MgH 2的脱氢活化能。根据HCS + MM过程的结构特征以及纳米Zr0.7Ti0.3Mn2和MWCNT的协同催化作用，提出了一种可能的加氢-脱氢机理。版权所有（C）2012，氢能出版物有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
Significant improvement of the hydrogen storage property of the magnesium-based materials was achieved by the process of hydriding combustion synthesis (HCS) followed by mechanical milling (MM) and the addition of nanosized Zr0.7Ti0.3Mn2 and MWCNT. Mg95Ni5 doped by 10 wt.% nanosized Zr0.7Ti0.3Mn2 and 3 wt.% MWCNT prepared by the process of HCS + MM absorbed 6.07 wt.% hydrogen within 100 s at 373 K in the first hydriding cycle and desorbed 95.1% hydrogen within 1800 s at 523 K. The high hydriding rate remained well and the hydrogen capacity reached 5.58 wt.% within 100 s at 423 K in the 10th cycle. The dehydrogenation activation energy of this system was 83.7 kJ/mol, which was much lower than that of as-received MgH2. A possible hydrogenation - dehydrogenation mechanism was proposed in terms of the structural features derived from the HCS + MM process and the synergistic catalytic effects of nanosized Zr0.7Ti0.3Mn2 and MWCNT. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.