Fig. 3. STEM images of Pt/ZnRh₂O₄/Ag/Bi₄V₂O₁₁. HAADF-STEM image (a) and the BF enlargement (b) in which Pt is indicated by arrows, and EDS elemental maps (c–f), in which blue (c), yellow (d), pink (e), and green (f) colors correspond to Bi, Ag, Rh, and Pt, respectively. In (a), the line along which the elemental analysis was performed is shown (A to B). Atomic percentages of Bi, V, Zn, Rh, Ag, and Pt measured from the area of Bi₄V₂O₁₁ (A) to that of ZnRh₂O₄ (B) (g). Enlarged images of (a)–(f) are shown in ESI-5.†.