Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 33, Pages 38302-38310Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c08327
Keywords
surface plasmon; plasmon-molecule interface; p-mercaptophenylboronic acid; in situ Raman; thiophenol molecule
Funding
- National Natural Science Foundation of China [11974180, 62022040]
- Six Talent Peaks Project in Jiangsu Province [XCL-038]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJCX21_0472, KYCX21_1104]
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This study demonstrates the acceleration of plasmon-mediated reduction reaction by introducing a molecular cocatalyst on the surface of silver nanoparticles. The strategy of using a molecular cocatalyst provides a simple and cost-effective approach to promote plasmonic photochemical reactions.
Localized surface plasmon resonance (LSPR) has been demonstrated to be highly effective in the initialization or acceleration of chemical reactions because of its unique optical properties. However, because of the ultrashort lifetime (fs to ps) of plasmon-generated hot carriers, the potential of LSPR in photochemical reactions has not been fully exploited. Herein, we demonstrate an acceleration of the plasmonmediated reduction of p-nitrothiophenol (PNTP) molecules on the surface of silver nanoparticles (AgNPs) with in situ Raman spectroscopy. p-Mercaptophenylboronic acid (PMPBA) molecules coadsorbed on AgNP surfaces act as a molecular cocatalyst in the plasmon-mediated reaction, resulting in a boosting of the PNTP reduction. This boosting is attributed to the improved transfer and separation of the plasmon-generated hot carriers at the interface of the AgNPs and coadsorbed PMPBA molecules. Our finding provides a highly simple, cost-effective, and highly effective strategy to promote plasmonic photochemistry by introducing a molecular cocatalyst, and this strategy can be extended to promote various plasmon-mediated reactions.
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