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
The Journal of Chemical Physics
Paper
The orientation of CO at the step sites of the Pt(321) surface and its implications for catalytic oxidation
Abstract
Angle-resolved photoemission spectroscopy employing polarized He II(40.8 eV) radiation has been used to characterize two distinct types of CO bonding, associated with terrace and step sites, that were shown to exist on the Pt(321) surface in an earlier TDS study. CO was found to be oriented normal to the (111) terraces of Pt(321) as it is to Pt(111). The step site CO was found to be oriented asymmetrically with respect to the Pt(321) normal and to be 40°±20° from [321] in the direction of [214]. This existence of such a tilted CO orientation has been postulated to explain the dynamics of the CO oxidation reaction on Pt surfaces in several recent studies. © 1984 American Institute of Physics.