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Adsorption of CO 2 at 90K on the Zn-terminated surface of ZnO leads to the detection of two peaks in thermal desorption spectroscopy (TDS) curves with desorption temperatures of 125K and 170K that shift to lower temperatures with coverage. These structures can be assigned to adsorption on pristine and intrinsic defect sites, respectively, of the surface with binding energies of 34.4kJ/mol...
Molecular beam scattering has been combined with TDS to provide consistent evidence for metal-support interactions (MSI). CO2 adsorbs on the Cu cluster and populated the perimeter of the clusters. The Cu-free areas of the support remain essentially clean. Hence, a synergistic effect such as MSI is present.
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