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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 >Dehydrogenation kinetics of 2LiBH_4 + MgH_2 enhanced by hydrogen back pressure and a CuCl_2 catalyst
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Dehydrogenation kinetics of 2LiBH_4 + MgH_2 enhanced by hydrogen back pressure and a CuCl_2 catalyst

机译：氢背压和CuCl_2催化剂增强2LiBH_4 + MgH_2的脱氢动力学

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摘要

In this work, the dehydrogenation kinetics of the 2LiBH_4 + MgH_2 composite under different hydrogen back pressures was studied. The applied hydrogen back pressure significantly influenced the hydrogen release rate of the uncatalyzed composite. Higher hydrogen pressures enhanced the nucleation of MgB_2. resulting in better dehydrogenation kinetics and cycle stability. The composite with a CuCl_2 catalyst demonstrated significantly improved dehydrogenation kinetics because the nucleation of MgB_2 was promoted by heterogeneous nuclei. However, similar effects of hydrogen back pressure on dehydrogenation kinetics were also observed for the CuCl_2-catalyzed composite. The extraordinary results suggest that hydrogen back pressure plays an indispensable role in the formation of MgB_2, which determines not only the reaction pathway but also the kinetics of dehydrogenation for the 2LiBH_4 + MgH_2 composite.
机译：在这项工作中，研究了2LiBH_4 + MgH_2复合材料在不同氢气背压下的脱氢动力学。施加的氢背压显着影响了未催化复合材料的氢释放速率。较高的氢气压力增强了MgB_2的成核作用。导致更好的脱氢动力学和循环稳定性。具有CuCl_2催化剂的复合材料显示出显着改善的脱氢动力学，因为MgB_2的成核是由异质核促进的。然而，对于CuCl_2催化的复合材料，也观察到氢气背压对脱氢动力学的类似影响。非凡的结果表明，氢背压在MgB_2的形成中起着不可或缺的作用，这不仅决定了2LiBH_4 + MgH_2复合物的反应途径，而且还决定了脱氢动力学。

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