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.

Report Date:

1986-07-30

Pagination or Media Count:

38.0

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