Surface structure of nickel oxide layers on a Rh(111) surface

► Two monolayer oxide phases with (6 × 1)-Ni5O5 and (2√3 × 2)-Ni8O10 stoichiometries ► Above 1 ML a p(2 × 2) chemisorbed oxygen structure on Ni(111)-like layers forms. ► Under oxygen-rich conditions the NiOx films converge to bulk-like NiO(100) phases.