Efficiently multifunctional catalysts of 3D ordered meso-macroporous Ce0.3Zr0.7O2-supported PdAu@CeO2 core-shell nanoparticles for soot oxidation: Synergetic effect of Pd-Au-CeO2 ternary components

•PdAu@CeO2/3DOMM-CZ catalyst was successfully fabricated by EISA-CCT method.•3DOMM structure can enhance contact efficiency between reactants and catalysts.•Supported PdAu@CeO2 NPs can improve the activation property for gaseous reactants.•PdAu@CeO2/3DOMM-CZ catalyst exhibits excellent catalytic activity for soot oxidation.•Synergetic effect of Pd-Au-CeO2 ternary components promotes the rate determining step.