High-Pressure Raman and Calorimetry Studies of Vanadium(III) Alkyl Hydrides for Kubas-Type Hydrogen Storage
High-Pressure Raman and Calorimetry Studies of Vanadium(III) Alkyl Hydrides for Kubas-Type Hydrogen Storage
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用于 Kubas 型储氢的烷基钒氢化物的高压拉曼和量热研究
DOI：
10.1002/cphc.201600116
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发表时间：
2016
期刊：
影响因子：
2.9
通讯作者：
Morris L
中科院分区：
文献类型：
--
作者：
Morris L
环境条件下的可逆储氢已被确定为实现未来氢经济的主要瓶颈。在此，我们报道了一种通过库巴斯相互作用结合氢的无定形烷基氢化钒(III)凝胶。该材料在 120 bar 和 298 K 条件下具有 5.42 wt % H2 的重量吸附容量，在饱和状态下可逆，十个循环后容量没有损失。这对应于 75.4 kgH2m−3 的体积容量。 100bar 的拉曼实验证实 Kubas 结合参与了吸附机制。通过量热法直接测量，该材料的 H2 吸附焓为 +0.52 kJ mol−1H2，这对于没有复杂热管理系统的车辆来说是实用的。
Reversible hydrogen storage under ambient conditions has been identified as a major bottleneck in enabling a future hydrogen economy. Herein, we report an amorphous vanadium(III) alkyl hydride gel that binds hydrogen through the Kubas interaction. The material possesses a gravimetric adsorption capacity of 5.42 wt % H2at 120 bar and 298 K reversibly at saturation with no loss of capacity after ten cycles. This corresponds to a volumetric capacity of 75.4 kgH2m−3. Raman experiments at 100 bar confirm that Kubas binding is involved in the adsorption mechanism. The material possesses an enthalpy of H2adsorption of +0.52 kJ mol−1H2, as measured directly by calorimetry, and this is practical for use in a vehicles without a complex heat management system.