Abstract
In situ X-ray absorption spectroscopy (XAS) in fluorescence detection mode and at grazing incidence is a powerful technique for the investigation of the electronic structure and the local environment of thin layers at the electrolyte-electrode interfaces. We present the application of XAS to study the structure of UPD metal monolayers and submonolayers on gold single crystal substrates. The oxidation state of the adsorbed species and the partial charge transfer are obtained from XANES spectra; the structure of the adlayers is extracted from the EXAFS oscillations. Results on copper, nickel, and zinc electrodeposited onto gold single crystal electrode are presented and discussed.
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