Single Rh Adatoms Stabilized on α-Fe<sub>2</sub>O<sub>3</sub>(1102) by Coadsorbed Water
Florian Kraushofer, Lena Haager, Moritz Eder, Ali Rafsanjani‐Abbasi, Zdeněk Jakub, Giada Franceschi, Michele Riva, Matthias Meier, Michael Schmid, Ulrike Diebold, Gareth S. Parkinson
Abstract
mbar of water at room temperature, in marked contrast to the rapid sintering observed under UHV conditions. Annealing to 50 °C in UHV desorbs all water from the substrate leaving only the OH groups coordinated to Rh, and high-resolution ncAFM images provide a direct view into the internal structure. We provide direct evidence of the importance of OH ligands in the stability of single atoms and argue that their presence should be assumed when modeling single-atom catalysis systems.
Topics & Concepts
Scanning tunneling microscopeX-ray photoelectron spectroscopyDangling bondCatalysisChemistryAnnealing (glass)OxideMetalAdsorptionRhodiumMoleculeCrystallographyPhysical chemistryAnalytical Chemistry (journal)Materials scienceNanotechnologyHydrogenChemical engineeringEngineeringComposite materialBiochemistryChromatographyOrganic chemistryIron oxide chemistry and applicationsElectrocatalysts for Energy ConversionCatalytic Processes in Materials Science