Accession Number : ADA193747

Title :   An Analysis of the Vibrational Spectrum of Carbon Monoxide on Platinum Metal Electrodes.

Descriptive Note : Technical rept.,

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF CHEMISTRY

Personal Author(s) : Pons, Stanley ; Korzeniewski, Carol ; Schmidt, P ; Severson, M

PDF Url : ADA193747

Report Date : 30 Jul 1986

Pagination or Media Count : 38

Abstract : The vibrational frequencies of carbon monoxide adsorbed on a platinum metal electrode are obtained in terms of discrete interatomic interactions. We show that for linear changes in the binding energy of carbon and oxygen to the surface there is a linear dependence of the shift in CO vibrational frequency. Based on our model, we suggest that there is a direct, linear relationship between the binding energy and the applied electrostatic potential. As a result, we predict a linear dependence of the frequency on electrochemical potential in accord with experiment. We demonstrate that the application of a relatively large external electric field cannot account entirely for the observed vibrational frequency shift. We conclude that a combination of chemical bonding and electric field interactions are required to account for the observed spectral shifts.

Descriptors :   *CARBON MONOXIDE, *ELECTROCHEMISTRY, *VIBRATIONAL SPECTRA, CARBON, CHEMICAL BONDS, ELECTRIC FIELDS, ELECTRODES, ELECTROSTATICS, FREQUENCY, FREQUENCY SHIFT, INTERACTIONS, LINEARITY, NUCLEAR BINDING ENERGY, OXYGEN, PLATINUM, SHIFTING, SPECTRA, VIBRATION, MOLECULE MOLECULE INTERACTIONS, POTENTIAL ENERGY, SURFACE REACTIONS

Subject Categories : Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE