Incorporation of catalytically active materials into plasmonic metal nanostructures can efficiently merge the reactivity and energy-harvesting abilities of both types of materials for visible light photocatalysis. Herein, we explore the influence of electromagnetic hotspots in the ability of plasmonic core–shell colloidal structures to induce chemical transformations. For this study, we developed a synthetic strategy for the fabrication of Au nanoparticle (NP) trimers in aqueous solution through fine controlled galvanic replacement between Ag nanoprisms and Au precursors. Core–shell Au@M NP trimers with catalytically active metals (M = Pd, Pt) were subsequently synthesized using Au NP trimers as templates. Our experimental and computational results highlight the synergy of geometry and composition in plasmonic catalysts for plasmon-driven chemical reactions.

中文翻译：

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核-壳双金属纳米颗粒三聚体，可实现高效的光化学能转化

将催化活性材料掺入等离子体金属纳米结构中可以有效地合并两种类型的可见光光催化材料的反应性和能量收集能力。在本文中，我们探讨了电磁热点对等离激元核-壳胶体结构诱导化学转化的能力的影响。对于本研究，我们开发了一种通过在Ag纳米棱镜和Au前驱体之间进行精细控制的电置换来在水溶液中制备Au纳米粒子（NP）三聚体的合成策略。随后使用Au NP三聚体作为模板合成具有催化活性金属（M = Pd，Pt）的核-壳Au @ M NP三聚体。