Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5425762 | Surface Science | 2006 | 7 Pages |
Adsorption probability measurements (molecular beam scattering) have been conducted to examine the adsorption dynamics (i.e. the gas-surface energy transfer processes) of CO2 adsorption on the Zn-on-Cu(1Â 1Â 0) bimetallic system. The results indicate surface alloy formation, which is in agreement with prior studies. Depositing Zn at 300Â K on Cu(1Â 1Â 0), above the condensation temperature of CO2, leads to a “blocking” of CO2 adsorption sites by Zn which is incorporated in the Cu(1Â 1Â 0) surface. This apparent site blocking effect indicates a lowering of the CO2 binding energy on the alloyed surface as compared with the clean Cu(1Â 1Â 0) support. The Zn coverage has been calibrated by Auger electron spectroscopy and thermal desorption spectroscopy.