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CO oxidation activity of Au/TiO2(110) and Au/CeOx/TiO2(110) as a function of Au coverage. The area of TiO2(110) covered by CeOx was measured with ISS, before depositing gold, and found to be ≈16% of the clean substrate. The reported values for the production of CO2 were obtained after exposing the catalysts to 4 Torr of CO and 2 Torr of O2 at 300 K for 5 min. The number of CO2 molecules produced is normalized by the sample surface area.
