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INFRARED SPECTRA OF ADSORBATES ON ELECTRODE SURFACES

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/17265

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Title: INFRARED SPECTRA OF ADSORBATES ON ELECTRODE SURFACES
Creators: Severson, Mark W.; Schmidt, P. P.
Issue Date: 1987
Abstract: We present in situ infrared spectra of triatomic ions such as azide and tetrahedral ions such as sulfate adsorbed on a platinum metal electrode. To describe these systems, we use a simple model in which the interaction between the adsorbate and the surface is represented by a sum of two-center potential functions. Two effects contribute to the shifts in the vibrational frequencies upon adsorption. The first arises from the changes in the intramolecular force constants; these changes are due to the distorted geometry of the adsorbed molecule. The second effect is due to the force constants which arise from the intermolecular potential energy functions. The model is used to obtain information on the adsorbate orientation, and on the relative strength of the surface-adsorbate interaction.
URI: http://hdl.handle.net/1811/17265
Other Identifiers: 1987-RC-10
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