Abstract
AbstractIn situ IR spectra of CO adsorbed onto a smooth polycrystalline Pd electrode in 1 M HCIO4 were obtained as a function of surface coverage. CO surface coverage was obtained by direct electrochemical oxidation of the adsorbed CO. At low coverages a single, broad adsorption band was observed at a vibrational frequency attributed to CO in a three‐coordinate surface site. Three‐coordinated species are completely converted, over a relatively narrow coverage range, into an overlayer comprising CO adsorbed on a two‐coordinate site. This layer coexists with an increasing amount of linearly bonded CO as the coverage is increased up to the saturation value.
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