Structure of the (Bi)carbonate Adlayer on Cu(100) Electrodes
Reihaneh Amirbeigiarab, Alexander Bagger, Jing Tian, Jan Rossmeisl, Olaf M. Magnussen
Abstract
Abstract (Bi)carbonate adsorption on Cu(100) in 0.1 M KHCO 3 has been studied by in situ scanning tunneling microscopy. Coexistence of different ordered adlayer phases with ( ×6 )R45° and (4×4) unit cells was observed in the double layer potential regime. The adlayer is rather dynamic and undergoes a reversible order‐disorder phase transition at 0 V vs. the reversible hydrogen electrode. Density functional calculations indicate that the adlayer consists of coadsorbed carbonate and water molecules and is strongly stabilized by liquid water in the adjacent electrolyte.
Topics & Concepts
Scanning tunneling microscopeElectrolyteCarbonateElectrodeChemistryAdsorptionElectrode potentialElectrochemistryCrystallographyMoleculeHydrogenAnalytical Chemistry (journal)Inorganic chemistryMaterials sciencePhysical chemistryNanotechnologyOrganic chemistryChromatographyCO2 Reduction Techniques and CatalystsMolecular Junctions and NanostructuresIonic liquids properties and applications