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The reactivity of Cu, Ag, and Au nanoparticles and of the corresponding (111) surfaces of these elements toward CO oxidation and NO2 reduction has been investigated by means of DFT and DFT-D calculations. The co-adsorption energies of CO and O on Ag and Au surfaces are smaller than that corresponding to Cu surface but the oxidation reaction is energetically more favored for the heavier metals. The...