Abstract
The carbon monoxide (CO) adsorption on Pt(111) single-crystal electrode surfaces in acidic or neutral solution was studied by FT-IRRAS. The adsorption behavior on two types of surfaces, i.e. well-ordered and reconstructed (111) surfaces formed by different preparation methods, were compared with respect to surface morphology. On the well-ordered surface, three kinds of species, on-top (2080−2040 cm −1), bridge (1840−1810 cm −1) and three-fold (1785−1770 cm −) CO, were detected. A structural change between these species in the CO overlayer was induced by the applied potential and/or the coverages of CO on the electrode surface. On the reconstructed surface, no three-fold CO appeared due to the disordering of the (111) terrace caused by the surface reconstruction.
Published Version
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