Plasmon‐driven catalysis has attracted great attention in recent years, but the reaction efficiency remains to be improved. Photothermal Fe₅C₂@Au core–shell nanostructures are fabricated through a self‐assembly process of Fe₅C₂ and Au nanoparticles (NPs) with the assistance of hexanethiol, which can be highly efficient surface enhanced Raman spectroscopy (SERS) platforms for the study of plasmon‐driven dimerization of 4‐aminothiophenol (4‐ATP) and 4‐nitrothiophenol (4‐NTP). As compared to bare Au NPs, much accelerated reaction kinetics can be achieved on the Fe₅C₂@Au core–shell nanostructures by quantitatively determining the Raman intensity of the ν(N=N) band in the generated 4,4′‐dimercaptobenzene (DMAB). The photothermal effect from the Fe₅C₂ NPs may lower the energy barrier and generate more hot electrons for the plasmon‐driven catalysis. This photothermal route may open up new avenues for enhancing the reaction rate and broadening the research area of the plasmon‐driven catalysis.

中文翻译：

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Fe5C2 @ Au核-壳纳米结构的光热增强等离子体驱动催化

等离子体驱动的催化法近年来引起了极大的关注，但反应效率仍有待提高。Fe ₅ C ₂ @Au光热核壳纳米结构是通过在己硫醇的帮助下通过Fe ₅ C ₂和Au纳米颗粒（NPs）的自组装过程制备的，这可以是高效的表面增强拉曼光谱（SERS）平台，对4-氨基硫代苯酚（4-ATP）和4-硝基硫代苯酚（4-NTP）的等离激元驱动的二聚化的研究。与裸金纳米粒子相比，通过定量确定ν的拉曼强度，可以在Fe ₅ C ₂ @Au核-壳纳米结构上获得大大加速的反应动力学。生成的4,4'-二巯基苯（DMAB）中的（N = N）带。Fe ₅ C ₂ NPs的光热效应可能会降低能垒，并为等离激元驱动的催化反应产生更多的热电子。这种光热途径可能为提高反应速率和扩大等离激元驱动的催化研究领域开辟新途径。