核-壳双金属纳米粒子三聚体用于高效的光-化学能量转换
Core-Shell Bimetallic Nanoparticle Trimers for Efficient Light-to-Chemical Energy Conversion
摘要：
将催化活性物质结合到等离子体金属纳米结构中可以有效地合并两种类型的材料对于可见光发光的反应性和能量收集能力。在这里，我们探讨了电磁热点的等离子体核壳胶体结构的能力，以诱导化学转化的影响。在这项研究中，我们开发了一种合成策略，用于在水溶液中通过精细控制Ag纳米棱镜和Au前体之间的电流替换来制造Au纳米颗粒（NP）三聚体。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。我们的实验和计算结果突出了等离子体激元驱动的化学反应的等离子体激元催化剂的几何形状和组成的协同作用。
英文摘要：
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. Here 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.
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