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Adsorption on Oxide Surfaces

Adsorption on Oxide Surfaces

  • Gold on V2O3
  • Mg phthalo-cyanine on V2O3
  • Determination of absorption sites for molecular (CO, H2O, MgPc) and atomic species (Au, Pd, Fe, Ag)
  • Exploring the role of lattice defects and charge-transfer processes in the adsorption behavior
  • Identifying adiabatic and diabatic diffusion prior to adsorption

                                                                                           

Gold atoms on V2O3

  • Oxide defects irrelevant for Au-adsorption
  • Spatial distribution of Au given by band-bending effects due to bulk defects

https://uol.de/fileadmin/_processed/1/2/csm_Adsorption_1_6786f386d3.jpg

Topography and state-density maps for empty (middle) and filled states (right) of V2O3 films with atomic Au species  (15×15nm2)

For details: Nilius et al., New J. Phys. 11 (2009) 093007; Phys. Rev. Lett. 116 (2016) 236101.

 

 

Mg phthalocyanine on V2O3

  • MgPc preferentially binds to defects
  • Asymmetric appearance of MgPc marks local defect interaction

MgPc molecules bound to V2O3 thin films exhibiting V=O vacancies (23×23 nm2)

 

For details:

Simic-Milosevic, J. Phys. Chem. C 112 (2008) 10027.

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