Fig. 7From: The effect of surface oxidation on the catalytic properties of Ga3Ni2 intermetallic compound for carbon dioxide reductionGa 2p3/2 XPS high-resolution spectra at several depths between the surface and 30 nm at 25 °C of a the Ga3Ni2 oxidized monocrystalline surface (prior to the annealing experiments) and b after annealing at 600 °C. The corresponding Ni 2p3/2 spectra of c the oxidized surface and d after annealing at 600 °C. The spectra are not normalizedBack to article page