Fig. 1.

(A) STM image of 0.2 ML Pt/Fe₃O₄ (001). The surface Fe_oct atoms are imaged as rows along the [110] direction (illustrated by the parallel blue lines). The bright features on the rows of Fe (example highlighted by cyan arrow) are due to surface OH groups (37, 38). The red and yellow frames highlight Pt adatoms in two different geometries: bridging surface O atoms in between (Pt₁) and parallel to (Pt₁*) the Fe_oct rows. (B and C) DFT+U-based force-relaxed structural models of the two adsorption configurations.