Fig. 2: Synthetic illustration and morphology of Au@Pd core-shell catalysts.
From: Conjugated dual size effect of core-shell particles synergizes bimetallic catalysis
a Schematic illustration of the synthesis of Aux@yML-Pd core-shell bimetallic catalysts with varied Au core sizes and Pd shell thicknesses by combining the DP method with selective Pd ALD. HAADF-STEM images of Au2.8@2.9ML-Pd (b), Au4.3@2.9ML-Pd (c), Au5.6@2.9ML-Pd (d), and Au6.8@2.9ML-Pd (e) at low magnifications. The insets show their corresponding particle size distributions. STEM image and the corresponding EDS elemental mapping of Pd Lα1, Au Lα1, and constructed Pd + Au signals of Au2.8@2.9ML-Pd (f) and Au6.8@2.9ML-Pd (g) at low magnifications as well as a Au@Pd particle in Au6.8@2.9ML-Pd (h) at high magnification. Line profiles across the Au@Pd particle in (h) along the yellow arrow are also demonstrated. Representative atomic-resolution HAADF-STEM images of Au6.8@1.1ML-Pd (i), Au6.8@2ML-Pd (j), and Au6.8@2.9ML-Pd (k), along with the corresponding line intensity profiles along the numbered dashed rectangles to show the distance of the interplanar distance and lattice distance.
