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2-Aminoimidazole borohydride as a hydrogen carrier

机译:2-氨基咪唑硼氢化物作为氢载体

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2-Aminoimidazole borohydride (Im-NH _(2) BH _(4) ) is synthesized via the reaction between 2-aminoimidazole hemisulfate ((Im-NH _(2) ) _(2) SO _(4) ) and sodium borohydride by a simple ball milling method. This compound holds theoretical hydrogen capacity of 8.1 wt%. It is designed based on the strategy of destabilizating BH _(4) ~(?) using a large conjugated cation, Im-NH _(2) ~(+) and maximizing the protonic-hydridic hydrogen interaction by balancing their numbers. Thermal dehydrogenation analyses demonstrate that it can release about 3.2 wt% hydrogen (Na _(2) SO _(4) included) without gaseous impurities below 320 °C. The decomposition process has three exothermal steps and the onset dehydrogenation temperature is 50.5 °C. These results indicate that the above strategy is effective. The dehydrogenation process of this compound is discussed and the product at 320 °C is proposed to be C _(3) N _(3) H _(3) BH.
机译:通过2-氨基咪唑半硫酸盐之间的反应合成2-氨基咪唑硼氢化硼(IM-NH _(2)BH _(4))((IM-NH _(2))_(2)所以_(4))和钠通过简单的球磨方法硼化氢化物。该化合物具有理论氢容量为8.1wt%。它是基于使用大缀合阳离子,IM-NH _(2)〜(+)的不稳定BH _(4)〜(α)的策略,并通过平衡它们的数量来最大化质子 - 氢氢相互作用。热脱氢分析表明它可以释放约3.2wt%的氢(Na _(2)SO _(4)),其中包括低于320℃的气态杂质。分解过程具有三个放热步骤,发病脱氢温度为50.5℃。这些结果表明上述战略是有效的。讨论该化合物的脱氢过程,并提出在320℃下的产物为C _(3)N _(3)H _(3)BH。

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