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Ultra-small rhenium clusters supported on graphene.

ABSTRACT: The adsorption of very small rhenium clusters (2-13 atoms) supported on graphene was studied by high-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM). The atomic structure of the clusters was fully resolved with the aid of density functional theory calculations and STEM simulations. It was found that octahedral and tetrahedral structures work as seeds to obtain more complex morphologies. Finally, a detailed analysis of the electronic structure suggested that a higher catalytic effect can be expected in Re clusters when adsorbed on graphene than in isolated ones.

SUBMITTER: Miramontes O

PROVIDER: S-EPMC4365820 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature

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Ultra-small rhenium clusters supported on graphene.

Miramontes Orlando O Bonafé Franco F Santiago Ulises U Larios-Rodriguez Eduardo E Velázquez-Salazar Jesús J JJ Mariscal Marcelo M MM Yacaman Miguel José MJ

Physical chemistry chemical physics : PCCP 20150301 12

The adsorption of very small rhenium clusters (2-13 atoms) supported on graphene was studied by high-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM). The atomic structure of the clusters was fully resolved with the aid of density functional theory calculations and STEM simulations. It was found that octahedral and tetrahedral structures work as seeds to obtain more complex morphologies. Finally, a detailed analysis of the electronic structure suggested that a high ...[more]

PMID: 25721176

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