An IR study of CO surface diffusion on submonolayer metal overlayers
نویسنده
چکیده
The adsorption and surface diffusion of CO on Pd/W( 110) and Cu/Rh( 100) surfaces have been studied using infrared reflection-absorption spectroscopy (IRA.?). For CO adsorbed on 0.14 ML Pd on W ( I lo), the CO is found to diffuse from Pd to W at approximately 200 K. Likewise, CO adsorbed on ~0.1 ML Cu on Rh( 100) will diffuse from the Cu to the Rh at approximately 250 K. In addition, the CO adsorbed on the copper is blue-shifted relative to the gas phase CO stretching frequency of 2143 cm I.
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