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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Ultrafast Reaction between LiH and NH_3 during H_2 Storage in Li_3N
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Ultrafast Reaction between LiH and NH_3 during H_2 Storage in Li_3N

机译：Li_3N中H_2储存期间LiH和NH_3之间的超快反应

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摘要

Li_3N is a potential H_2 storage material due to its high theoretical H_2 capacity (10.4 wt %). A critical potential issue regarding this N-based storage material is the generation of NH_3, which consumes some H_2 and also constitutes a poison for the downstream processes. In this Letter, by using the temperature-programmed decomposition of a two-layer material (LiNH_2 and LiH), we demonstrate that NH_3 produced via the decomposition of LiNH_2 is completely captured by LiH even at very short contact times (25 ms) with the carrier gas. This ultrafast reaction between NH_3 generated during the dehydrogenation of the hydrogenated Li_3N to escape into the H_2 stream. However, if the hydrogenated Li_3N was previously exposed to the atmosphere, some NH_3 could escape into the H_2 stream during the H_2 desorption, due to the partial oxidation of LiH by the water present in air.
机译：Li_3N由于其高的理论H_2容量（10.4 wt％）而成为潜在的H_2储存材料。关于这种基于N的存储材料，一个潜在的关键潜在问题是NH_3的产生，NH_3消耗一些H_2，并且也构成下游过程的毒物。在这封信中，通过使用两层材料（LiNH_2和LiH）的程序升温分解，我们证明了即使在很短的接触时间（25毫秒）下，LiH仍可以完全捕获LiH完全捕获通过LiNH_2分解产生的NH_3。载气。在氢化的Li_3N脱氢过程中产生的NH_3之间的这种超快反应逃逸到H_2流中。但是，如果氢化的Li_3N事先暴露在大气中，则由于H2会被空气中的水部分氧化，因此一些NH_3可能会在H_2解吸期间逸出到H_2流中。

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