Underpotential Deposition upd of Monolayers

The modifleation of a metal electrode surface by the controlled deposition of a mono-layer of a second metal at potentials positive to the bulk deposition potential is known as underpotential deposition (upd) [22]. This area of research has proved to be especially 

It is interesting to compare the observations of Lucas et al, that Pb deposition has an effect on the Pt interlayer spacing [31], with Fleischmann s observation of loss of order in the low-angle region for Pb deposition onto roughened Ag [2], and the lack of such an 

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The electrodeposition of alloys at potentials positive of the reversible potential of the less noble species has been observed in several binary alloy systems. This shift in the deposition potential of the less noble species has been attributed to the decrease in free energy accompanying the formation of solid solutions and/or intermetallic compounds [61, 62], Co-deposition of this type is often called underpotential alloy deposition to distinguish it from the classical phenomenon of underpotential deposition (UPD) of monolayers onto metal surfaces [63],... 

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