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Interaction between hydrogen molecules and metallofullerenes

机译:氢分子与金属富勒烯之间的相互作用

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Within first-principles density functional theory, we explore the feasibility of usingmetallofullerenes as efficient hydrogen storage media. In particular, we systematically investigatethe interaction between hydrogen molecules and La encapsulated all-carbon fullerenes, C_n (20 n82), focusing on the role of transferred charges between the metal atoms and fullerenes on theaffinity of hydrogen molecules to the metallofullerenes. Our calculations show that three electronsare transferred from La atom to fullerene cages, while the induced charges are mostly screened bythe fullerene cages. We find the local enhancement of molecular hydrogen affinity to the fullerenesto be sensitively dependent on the local bonding properties, rather than on the global chargingeffects
机译:在第一性原理密度泛函理论中,我们探索了使用金属富勒烯作为有效氢存储介质的可行性。特别是,我们系统地研究了氢分子与La封装的全碳富勒烯C_n(20 n82)之间的相互作用,重点研究了金属原子和富勒烯之间转移的电荷对氢分子与金属富勒烯亲和力的作用。我们的计算表明,三个电子从La原子转移到富勒烯笼中,而感应电荷大部分被富勒烯笼屏蔽。我们发现分子氢对富勒烯的亲和力的局部增强敏感地取决于局部键合特性,而不是全局充电效应

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