fig1

Figure 1. All the possible low-index facets and adsorption sites studied in this work. (A and B) Cr₁Ce₁ (001) surface with Cr and Ce termination, respectively; (C-F): (100), (101), (110) and (111) surfaces. Green and ochre spheres represent Cr and Ce atoms, respectively. The different adsorption sites: top, bridge, 3-fold and 4-fold hollow sites are illustrated in Figure 1A.