Conjugating plasmonic metals with catalytically active materials with controlled configurations can harness their light energy harvesting ability in catalysis. Herein, we present a well-defined core–shell nanostructure composed of an octahedral Au nanocrystal core and a PdPt alloy shell as a bifunctional energy conversion platform for plasmon-enhanced electrocatalysis. The prepared Au@PdPt core–shell nanostructures exhibited significant enhancements in electrocatalytic activity for methanol oxidation and oxygen reduction reactions under visible-light irradiation. Our experimental and computational studies revealed that the electronic hybridization of Pd and Pt allows the alloy material to have a large imaginary dielectric function, which can efficiently induce the shell-biased distribution of plasmon energy upon illumination and, hence, its relaxation at the catalytically active region to promote electrocatalysis.

中文翻译：

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引导核壳纳米结构中的能量流以实现高效等离子体增强电催化

将等离子体金属与具有受控配置的催化活性材料结合可以利用它们在催化中的光能收集能力。在此，我们提出了一种由八面体 Au 纳米晶核和 PdPt 合金壳组成的明确定义的核壳纳米结构，作为等离子体增强电催化的双功能能量转换平台。制备的 Au@PdPt 核壳纳米结构在可见光照射下对甲醇氧化和氧还原反应的电催化活性显着增强。我们的实验和计算研究表明，Pd 和 Pt 的电子杂化使合金材料具有较大的虚介电函数，这可以在光照下有效地诱导等离激元能量的壳偏分布，因此，