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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of synthesis route on the hydrogen storage properties of 2MgH(2)-Fe compound doped with LiBH4
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Effect of synthesis route on the hydrogen storage properties of 2MgH(2)-Fe compound doped with LiBH4

机译：合成路线对掺杂LiBH4的2MgH（2）-Fe化合物储氢性能的影响

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摘要

The hydrogen storage properties of a 2:1 mol ratio of MgH2 and Fe with or without 10 wt.% of LiBH4 were investigated. Two doping methods were used: the first one consisted of two steps: first the 2MgH(2) + Fe mixture was ball milled for 10 h and subsequently LiBH4 was added and milling resumed for 1 more hour. In the second method all materials were mixed and ball milled for 10 h. The first method produced materials with an hydrogen dehydrogenation capacity of 2.69 wt.% at 623 K and that could re-absorb 2.93 wt.% H-2. The materials made by the second method presented a hydrogen dehydrogenation capacity of 2.98 wt.% at 623 K and re-absorbed 3.10 wt.% H-2. For both methods, the rehydrided sample consisted only of MgH2. The reversibility of the reaction was enhanced with the LiBH4, but this additive, by acting as a catalyst for the formation of MgH2, precludes the formation of Mg2FeH6. (C) 2015 Elsevier B.V. All rights reserved.
机译：研究了MgH2和Fe有或没有10 wt。％LiBH4的摩尔比为2：1的储氢性能。使用了两种掺杂方法：第一种由两个步骤组成：首先将2MgH（2）+ Fe混合物球磨10小时，然后添加LiBH4，并继续进行1小时的研磨。在第二种方法中，将所有材料混合并球磨10小时。第一种方法生产的材料在623 K下的氢脱氢能力为2.69 wt。％，并且可以重新吸收2.93 wt。％H-2。用第二种方法制得的材料在623K下的氢脱氢能力为2.98wt。％，再吸收了3.10wt。％的H-2。对于这两种方法，再水化的样品仅包含MgH2。 LiBH4增强了反应的可逆性，但是这种添加剂通过充当MgH2形成的催化剂，阻止了Mg2FeH6的形成。 （C）2015 Elsevier B.V.保留所有权利。

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