Electrodeposition of Tin onto a Well-Defined Pt(111) Surface from Aqueous HBr Solutions. Studies by LEED and Auger Electron Spectroscopy

摘要

We wish to report an instance in which the energetic driving force for electrosorption, in this case the substantial affinity of tin oxygen monolayers for the Pt surface, was sufficient to cause spontaneous deposition of monolayer quantities of material upon immersion (of Pt into Sn(II) solutions) at open circuit. Since the electrodeposition of Sn species occurred without flow of current in the external circuit, the deposited species were detected, identified, and quantitated by Auger electron spectroscopy (1) along the lines of previous work from this laboratory (2). After cleaning and annealing, the electrode was examined by LEED and Auger spectroscopy to directly verify surface structural and compositional purity.