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This work introduces a highly effi cient dual-heterostructured catalyst consisting of magnetic Fe 3 O 4 cores, CeO 2 shells and coated with noble metal nanoparticles. The synergistic catalytic eff ect and redox eff ect features are benefi cial for superior catalytic and electrochemical performance. This synthetic strategy provides a new methodology for the preparation of highly effi cient dual-heterostructured catalysts.We report the creation of highly efficient, dual-heterostructured catalysts consisting of magnetic Fe 3 O 4 cores and CeO 2 shells coated with noble metal nanoparticles (NMNPs) (Pt, Pd and Pt-Pd nanoparticles).These intriguing dual-heterostructural features that favor reactant diffusion and exposure of active sites can enhance synergistic catalytic effects between the NMNPs and CeO 2 nanoparticles. The synergistic catalytic effect and redox effect features between Fe 3 O 4 and CeO 2 are beneficial for superior catalytic and electrochemical performance. Impressively, the resultant Fe 3 O 4 @CeO 2 /Pd (3 wt%) andFe 3 O 4 @CeO 2 /Pt (20 wt%) catalysts manifest superior catalytic efficiency and electrocatalytic reactivity toward the reduction of 4-nitrophenol and oxidation of methanol in alkaline solution, demonstrating the significance of the dual heterostructure of these recyclable catalysts. This synthetic strategy provides a new methodology for the fabrication of other high-performance and multifunctional catalysts, which would be very useful in various catalytic reactions.