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• W2912081437 startingPage "5322" @default.
• W2912081437 abstract "Abstract The rational design and implementation of a one‐pot method is reported for the facile synthesis of Pd@Pt n L ( n L denotes the number of Pt atomic layers) core‐shell icosahedral nanocrystals in a single step. The success of this method relies on the use of Na 2 PdCl 4 and Pt(acac) 2 as the precursors to Pd and Pt atoms, respectively. Our quantitative analysis of the reduction kinetics indicates that the Pd II and Pt II precursors are sequentially reduced with a major gap between the two events. Specifically, the Pd II precursor is reduced first, leading to the formation of Pd‐based icosahedral seeds with a multiply‐twinned structure. In contrast, the Pt II precursor prefers to take a surface reduction pathway on the just‐formed icosahedral seeds. As such, the otherwise extremely slow reduction of the Pt II precursor can be dramatically accelerated through an autocatalytic process for the deposition of Pt atoms as a conformal shell on each Pd icosahedral core. Compared to the conventional approach of seed‐mediated growth, the throughput for the one‐pot synthesis of Pd@Pt n L core‐shell nanocrystals can be increased by more than 30‐fold. When used as catalysts, the Pd@Pt 4.5L core‐shell icosahedral nanocrystals show specific and mass activities of 0.83 mA cm −2 and 0.39 A mg Pt −1 , respectively, at 0.9 V toward oxygen reduction. The Pt‐based nanocages derived from the core‐shell nanocrystals also show enhanced specific (1.45 mA cm −2 ) and mass activities (0.75 A mg Pt −1 ) at 0.9 V, which are 3.8 and 3.3 times greater than those of the commercial Pt/C, respectively." @default.
• W2912081437 created "2019-02-21" @default.
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• W2912081437 date "2019-03-18" @default.
• W2912081437 modified "2023-10-17" @default.
• W2912081437 title "One‐Pot Synthesis of Pd@Pt _{<i>n</i> L} Core‐Shell Icosahedral Nanocrystals in High Throughput through a Quantitative Analysis of the Reduction Kinetics" @default.
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• W2912081437 doi "https://doi.org/10.1002/chem.201900229" @default.
• W2912081437 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30768814" @default.
• W2912081437 hasPublicationYear "2019" @default.
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