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首页> 外文期刊>RSC Advances >Improving the rates of Pd-catalyzed reactions by exciting the surface plasmons of AuPd bimetallic nanotriangles
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Improving the rates of Pd-catalyzed reactions by exciting the surface plasmons of AuPd bimetallic nanotriangles

机译：通过激发AuPd双金属纳米三角形的表面等离子体激元来提高Pd催化反应的速率

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Gold nanoparticles exhibit unique optical properties due to surface plasmon oscillations when they interact with light. By utilizing their optical properties, the rates of many chemical reactions have been improved in the presence of visible light. The properties of plasmonic nanoparticles are highly tunable based on the size and shape of the nanoparticle. Here, we have used anisotropic AuPd bimetallic nanotriangles to improve the rates of Pd-catalyzed reactions in the presence of visible light. We synthesized AuPd core–shell bimetallic nanotriangles and performed Suzuki cross-coupling and hydrogenation reactions in light and dark conditions. Upon illuminating AuPd nanotriangles with an array of green LEDs (power ～ 500 mW), enhanced catalytic activity of palladium was observed. In order to understand the relative contributions of individual plasmonic effects, such as plasmonic hot electron transfer and plasmonic heating effects, the reaction temperatures were monitored, and careful control experiments were run at different temperatures. Our results indicated that the enhancement in the rate of these Pd-catalyzed reactions is primarily due to the plasmonic heating effect.
机译：当金纳米颗粒与光相互作用时，由于表面等离子激元振荡，它们具有独特的光学性能。通过利用它们的光学性质，在可见光存在下，许多化学反应的速率得到了提高。基于纳米粒子的尺寸和形状，等离子体纳米粒子的性质是高度可调的。在这里，我们已经使用各向异性的AuPd双金属纳米三角形在可见光存在的情况下提高了Pd催化反应的速率。我们合成了AuPd核-壳双金属纳米三角形，并在明暗条件下进行了Suzuki交叉偶联和氢化反应。用绿色LED阵列（功率〜500 mW）照亮AuPd纳米三角形后，观察到钯的催化活性增强。为了理解各个等离激元效应的相对贡献，例如等离激元热电子转移和等离激元加热效应，监测反应温度，并在不同温度下进行仔细的控制实验。我们的结果表明，这些Pd催化反应速率的提高主要归因于等离子体热效应。

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