Fig. 2: Synthesis and characterization of the Ru/Pd/MCMOS cascade catalyst.

a Schematic illustration for the fabrication of Ru/Pd/MCMOS. b–d HAADF-STEM images of Ru/MCMOS (b), Pd/MCMOS (c) and Ru/Pd/MCMOS (d). e–g High-magnification HAADF-STEM image (e), EDX element mapping (f) and EDX line-scanning profile (g) of Ru/Pd/MCMOS.