A Mesoporous Nanorattle-Structured Pd@PtRu Electrocatalyst

Graphical Being rattled : Pt-based nanorattle-structured materials consisting of Pd core and mesoporous PtRu shell (Pd@mPtRu NRs) have been prepared by a facile method. Benefitting from the superior morphology and composition, the obtained Pd@mPtRu NRs could be used as efficient electrocatalyst for oxygen reduction reaction. 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 a Pd core and a mesoporous PtRu shell. Owing to the unique structure and PtRu alloy composition, the prepared Pd@mPtRu NRs exhibit an 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.