Modulating the Plasmon-Mediated Decarboxylation Reaction on Silver Nanoparticles by Changing the Surface Adsorption of Molecular Cocatalysts of p-Hydroxythiophenol
JOURNAL OF PHYSICAL CHEMISTRY C(2024)
摘要
The decarboxylation reaction can be accelerated with the assistance of localized surface plasmon resonance under mild conditions, benefiting from the enhanced light utilization and excitation of high-energy hot carriers. However, the reaction rate remains far below the theoretical limit since plasmon-excited hot carriers easily recombine due to their ultrashort lifetime. Herein, we effectively accelerate the decarboxylation reaction of p-mercaptobenzoic acid (PMBA) on the surface of silver nanoparticles (AgNPs) by coadsorbing p-hydroxythiophenol (PHTP) molecules as molecular cocatalysts. More importantly, the period of this coadsorption is crucial to the obtained reaction rate acceleration. Compared with short-period coadsorption, long-period coadsorption could lead to a larger acceleration in reaction rate, due to the further promoted separation of plasmon-generated hot carriers. This work provides a simple, convenient, and effective strategy to boost the decarboxylation reactions on silver surfaces. This strategy holds potential for developing a variety of highly efficient plasmon-based catalysts in the near future.
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