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We carry out density functional theory calculations to study the adsorption of hydrogen molecules on Eu‐decorated single‐ and double‐sided graphene sheets. It is found that Eu prefers to adsorb on the hollow site of carbon ring above both the single‐ and double‐sided graphene. The hybridization of Eu on graphene is mainly between the Eu‐5d orbital and the C‐2p orbital. The charge of Eu is enhanced...
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