Electrochemical Deposition of Copper on a Gold Electrode in Sulfuric Acid: Resolution of the Interfacial Structure
- 11 December 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 75 (24) , 4472-4475
- https://doi.org/10.1103/physrevlett.75.4472
Abstract
The structure of electrochemically deposited submonolayer Cu on Au(111) in sulfuric acid has been extensively investigated but is still poorly known. We report an x-ray scattering determination of this structure that explains existing data. The Cu adatoms form a honeycomb lattice and are adsorbed on threefold hollow sites, while sulfate anions occupy the honeycomb centers. Three oxygens of each sulfate bond to Cu atoms. This stabilizes the structure and illustrates that anion effects can be important in electrodeposited structures. Our results indicate that previous scanning tunneling and atomic force microscopy measurements imaged the sulfate molecules not the Cu atoms.Keywords
This publication has 24 references indexed in Scilit:
- The adsorption of sulfate on gold(111) in acidic aqueous media: adlayer structural inferences from infrared spectroscopy and scanning tunneling microscopeJournal of Electroanalytical Chemistry, 1994
- Coadsorption of Cu2+ and SO42− at the Au(111) electrodeJournal of Electroanalytical Chemistry, 1994
- An in-situ electrochemical quartz crystal microbalance study of the underpotential deposition of copper on Au(111) electrodesJournal of Electroanalytical Chemistry, 1994
- Investigations of SO42− adsorption at the Au(111) electrode in the presence of underpotentially deposited copper adatomsJournal of Electroanalytical Chemistry, 1994
- Detailed underpotential deposition of copper on gold(III) in aqueous solutionsJournal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1991
- Electronic and structural characterization of underpotentially deposited submonolayers and monolayer of copper on gold (111) studied byin situx-ray-absorption spectroscopyPhysical Review Letters, 1991
- Atomic structure of ordered copper adlayers on single-crystalline gold electrodesJournal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 1991
- Atomic-Resolution Electrochemistry with the Atomic Force Microscope: Copper Deposition on GoldScience, 1991
- Atomic structure of Cu adlayers on Au(100) and Au(111) electrodes observed byin situscanning tunneling microscopyPhysical Review Letters, 1990
- In-plane structure of underpotentially deposited copper on gold(111) determined by surface EXAFSLangmuir, 1988