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Influence of a ZrO2 Support and Its Surface Structures on the Stability and Nucleation of Ptn (n = 1-5) Clusters: A
1Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China.
Abstract:
Density functional theory calculations together with periodic slab models are applied to investigate the influence of a ZrO2 support and its surface structures on the stability and nucleation of Ptn (n = 1-5) clusters. The three surfaces of ZrO2 include cubic ZrO2(c-ZrO2) (111), monoclinic ZrO2(m-ZrO2) (-111), and tetragonal ZrO2(t-ZrO2) (101) surfaces. Our results show that the stability of the Ptn clusters on the three surfaces and the isolated Ptn clusters follows the trend m-ZrO2(-111) > t-ZrO2(101) > c-ZrO2(111) > isolated cluster, whereas the nucleation ability over the three surfaces follows the opposite trend: isolated cluster > c-ZrO2(111) > t-ZrO2(101) > m-ZrO2(-111). Therefore, Ptn clusters can have a better stability and dispersion due to the effect of the support.
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