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Photocatalyzed organic transformations have spurred immense interest in synthetic chemistry for the efficient conversion of solar energy into chemical energy. However, the crucial roles of support, which fixes catalytic sites and improves the light-harvesting ability, are often ignored in photoredox transformations. Herein, we report the utilization of spherical SiO2 support to engineer AuPd alloy particles (denoted as AuPd/SiO2), conceptually different from traditional methods for tuning optical absorption of plasmonic Au or AuPd particles, to manipulate light-harvesting ability of AuPd particles for highly selective and efficient photocatalytic Suzuki cross-coupling reactions. In this deliberately designed system, typically without the size and shape alternation of AuPd particles, the supported AuPd particles recycle the scattering light from spherical SiO2 support and achieve the significant broad light-harvesting ability instead of the surface plasmon resonance peak. The engineered AuPd/SiO2 composites by the use of near-field scattering-promoted optical absorption showcase the remarkably enhanced activity for visible-light-induced photocatalytic Suzuki cross-coupling reactions in comparison with that using commercial SiO2 support, highlighting the spherical-support-effect induced efficient utilization of scattered light. This work highlights the feasibility of manipulating the light-harvesting capability of bimetallic particles by the near-field scattering-promoted optical absorption model toward efficient photo-driven Suzuki cross-coupling reaction and other C–C coupling organic synthesis to produce high value-added chemicals.

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Publication history

Received: 29 December 2021
Revised: 29 December 2021
Accepted: 17 January 2022
Published: 02 July 2022
Issue date: March 2022

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© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

The support from the National Natural Science Foundation of China (Nos. 22172030, 22072023, 21872029, and U1463204), the Program for National Science and Technology Innovation Leading Talents (No. 00387072), the 1st Program of Fujian Province for Top Creative Young Talents, the Award Program for Minjiang Scholar Professorship, the Natural Science Foundation (No. 2019J0106) of Fujian Province, and the Natural Science Foundation of Fujian Province for Distinguished Young Investigator Rolling Grant (No. 2017J07002) is gratefully acknowledged.

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Email: nanores@tup.tsinghua.edu.cn

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