Figure 2: ADF–STEM images and elemental mapping.

Modelled structure, ADF-STEM image, and 2D EELS maps of each element and composites of Pd3Cu/C (a) and Pd6CoCu/C (b). Scale bar, 2 nm. (c) Elemental maps of a Pd₆CoCu particle’s surface and subsurface volume extracted from an atomic-scale EELS map. Scale bar, 1 nm.