title: 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.
authors.affiliation: Department of Physics and Astronomy, University of Texas at San Antonio, USA. miguel.yacaman@utsa.edu.
authors.forename: Orlando
authors.initials: O
authors.lastname: Miramontes
authors.forename: Franco
authors.initials: F
authors.lastname: Bonafé
authors.forename: Ulises
authors.initials: U
authors.lastname: Santiago
authors.forename: Eduardo
authors.initials: E
authors.lastname: Larios-Rodriguez
authors.forename: Jesús J
authors.initials: JJ
authors.lastname: Velázquez-Salazar
authors.forename: Marcelo M
authors.initials: MM
authors.lastname: Mariscal
authors.forename: Miguel José
authors.initials: MJ
authors.lastname: Yacaman
mesh_terms: D000327:Adsorption; D006108:Graphite / Q000737:chemistry*; D017348:Microscopy, Electron, Scanning Transmission; D056004:Molecular Dynamics Simulation; D012211:Rhenium / Q000737:chemistry*
chemical_list: D012211:Rhenium; D006108:Graphite