4.8 Article

Controlling Selectivity in Plasmonic Catalysis: Switching Reaction Pathway from Hydrogenation to Homocoupling Under Visible-Light Irradiation

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WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202216398

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Bimetallic; Nanocatalysis; Photocatalysis; Selectivity; Surface Plasmon Resonance

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Plasmonic catalysis enables the use of light to accelerate molecular transformations and control reaction selectivity. The plasmonic properties in AgPd nanoparticles allow different reaction pathways for tunable product formation under visible-light irradiation. This study provides important insights into the understanding of reaction selectivity with light and brings the vision of light-driven transformations with target selectivity one step closer to reality.
Plasmonic catalysis enables the use of light to accelerate molecular transformations. Its application to the control reaction selectivity is highly attractive but remains challenging. Here, we have found that the plasmonic properties in AgPd nanoparticles allowed different reaction pathways for tunable product formation under visible-light irradiation. By employing the hydrogenation of phenylacetylene as a model transformation, we demonstrate that visible-light irradiation can be employed to steer the reaction pathway from hydrogenation to homocoupling. Our data showed that the decrease in the concentration of H species at the surface due to plasmon-enhanced H-2 desorption led to the control in selectivity. These results provide important insights into the understanding of reaction selectivity with light, paving the way for the application of plasmonic catalysis to the synthesis of 1,3-diynes, and bringing the vision of light-driven transformations with target selectivity one step closer to reality.

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