{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Missaoui G"],"funding":["Deutsche Forschungsgemeinschaft","Ministry of Lower Saxony"],"pagination":["45026-45032"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12367229"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["17(31)"],"pubmed_abstract":["The mixing characteristics of oxide materials largely depend on the dimensionality of the system, and many oxide-alloy structures in three dimensions (3D) do not have a 2D analog. To unravel fundamental alloying mechanisms in 2D, V/Cr mixing into oxide thin films is investigated on Pt(111) by scanning tunneling microscopy and density functional theory. The experiments reveal flat, double-stack islands made of a compact bottom and a honeycomb top layer with a 4.5 Å total height. The energetically most favorable structure-match comprises an O-Cr-O trilayer at the interface to the Pt(111) capped by a mixed V/Cr honeycomb top layer. The structure is stabilized by strong interlayer adhesion, reinforced by a charge transfer toward the central trilayer from the metal support and the honeycomb plane. A negative V/Cr mixing enthalpy arises from the presence of two distinct surface sites that enable formation of tetrahedrally coordinated V<sup>5+</sup> and octahedrally coordinated Cr<sup>3+</sup> cations. The identified thin-film structure bears resemblance to a (111) cut of a hypothetical V/Cr spinel, a unique 2D configuration without bulk equivalent that is stabilized solely by its nanoscale thickness and a strong coupling to the Pt support."],"journal":["ACS applied materials & interfaces"],"pubmed_title":["Chromium/Vanadium Mixed Oxide Films on Pt(111): Revealing Oxide Alloying Mechanisms in Two Dimensions."],"pmcid":["PMC12367229"],"funding_grant_id":["Ni 650/5_2"],"pubmed_authors":["Missaoui G","Wemhoff PI","Noguera C","Nilius N","Goniakowski J"],"additional_accession":[]},"is_claimable":false,"name":"Chromium/Vanadium Mixed Oxide Films on Pt(111): Revealing Oxide Alloying Mechanisms in Two Dimensions.","description":"The mixing characteristics of oxide materials largely depend on the dimensionality of the system, and many oxide-alloy structures in three dimensions (3D) do not have a 2D analog. To unravel fundamental alloying mechanisms in 2D, V/Cr mixing into oxide thin films is investigated on Pt(111) by scanning tunneling microscopy and density functional theory. The experiments reveal flat, double-stack islands made of a compact bottom and a honeycomb top layer with a 4.5 Å total height. The energetically most favorable structure-match comprises an O-Cr-O trilayer at the interface to the Pt(111) capped by a mixed V/Cr honeycomb top layer. The structure is stabilized by strong interlayer adhesion, reinforced by a charge transfer toward the central trilayer from the metal support and the honeycomb plane. A negative V/Cr mixing enthalpy arises from the presence of two distinct surface sites that enable formation of tetrahedrally coordinated V<sup>5+</sup> and octahedrally coordinated Cr<sup>3+</sup> cations. The identified thin-film structure bears resemblance to a (111) cut of a hypothetical V/Cr spinel, a unique 2D configuration without bulk equivalent that is stabilized solely by its nanoscale thickness and a strong coupling to the Pt support.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Aug","modification":"2026-05-05T12:35:32.074Z","creation":"2026-04-07T21:42:15.356Z"},"accession":"S-EPMC12367229","cross_references":{"pubmed":["40711980"],"doi":["10.1021/acsami.5c05932"]}}