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Influence of a Cu-Zirconia Interface Structure on CO2 Adsorption and Activation
preprintsubmitted on 07.03.2021, 12:28 and posted on 09.03.2021, 05:52 by Lars Gell, Aku Lempelto, toni Kiljunen, Karoliina Honkala
We have screened different Cu-ZrO2 interface structures and analysed the influence of the interface structure on CO2 binding strength using density functional theory calculations. Our results demonstrate that a Cu nanorod favours one position on both tetragonal and monoclinic ZrO2 surfaces, where the bottom Cu atoms are placed close the lattice oxygens. CO2 prefers a bent bidentate configuration at the interface and the molecule is clearly activated being negatively charged. Altogether, our results highlight that CO2 adsorption and activation depend sensitively on the chemical composition and atomic structure of the interface used in the calculations.