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Underpotential deposition of Cu on bromide-modified Au(111): an in situ scanning tunneling microscopy study.
J. Valenzuela-Benavides1 and A. Martínez-Ruiz2.
1Centro de Ciencias de la Materia Condensada, U.N.A.M.. Apdo. Postal 2681,
Ensenada, B.C. 22800, México.
2Facultad de Ciencias, Universidad Autónoma de Baja California, Apdo. Postal
1820, Ensenada, B.C. 22800, México.

 
Continuing with our recent study of Cu undepotential deposition (UPD) on iodine-modified Au(111), we present results from Cu UPD on bromide-modified Au(111) electrode surfaces in sulfuric acid solutions. As in the case of iodine, the bromide adlayer undergoes structural changes as copper deposition proceeds until the completion of a Cu monolayer is reached. Scanning tunneling images and cyclic voltammetry results are presented during copper deposition and stripping  on and from the  Au surface.



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