About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Journal of Electron Spectroscopy and Related Phenomena
Paper
Yet another vibrat1onal study of the adsorption system Pt{111}-CO
Abstract
Infrared spectra of CO adsorbed on Pt{111} indicate only one linear and one bridging species below θ = 0.5. The linear band is subject to a positive dipole-coupling shift and a negative chemical one, both of which exhibit a maximum when plotted as a function of coverage. When q > 0.50, a complex temperature-dependent pattern of shifts and splittings arises in both bands. The temperature-dependent behaviour of the bridging band reported in an earlier paper by Hayden and Bradshaw was not observed. In addition to the bands characteristic of the perfect surface, a second linear band, about 15 cm-1 below the first, is produced by defect sites: we show that such defects are likely to have produced very significant effects in earlier studies of the Pt{111}-CO system. We also propose a real-space interpretation of the low-coverage LEED patterns first reported by Steininger et al. © 1987.