Abstract
Three intense Raman bands were observed at 158, 180 and 2142 cm -1 after the exposure of the silver film to about 0.5 L of carbon monoxide (CO) at 80 K. We found that oxygen coadsorbed with CO induces an upward peak shift of the C-O stretching Raman band to a frequency above that of a gas phase CO. The re-enforcement of the bond between CO and the substrate by the presence of the coadsorbed oxygen was confirmed by the observation of the upward peak shifts of the low frequency bands. Discussion on the change in the adsorption state of CO due to the coadsorption is given in relation to an electronegativity of the coadsorbate. The proposed scheme consistently explains not only the peak shift of the C-O stretching band but also the change in the bond strength between CO and the substrate.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
