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Mesoporous Nanorattle Structured Pd@PtRu Electrocatalyst.

Pt-based nanomaterials play important roles in the catalytic process toward oxygen reduction reaction (ORR). Rationally regulating the composition and morphology of the catalysts could enhance the catalytic performance effectively. In this work, an effective method is presented to synthesize Pd@ mesoporous PtRu nanorattles (Pd@mPtRu NRs) containing Pd core and mesoporous PtRu shell. Owning to the unique structure and PtRu alloy composition, the prepared Pd@mPtRu NRs exhibit enhanced catalytic performance and durability toward ORR relative to mesoporous PtRu hollow nanoparticles (mPtRu HNs) and commercial Pt/C. The proposed approach may provide a general way to synthesize Pt-based yolk-shell structures with different compositions.