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.

光催化有机转化激发了人们对合成化学的极大兴趣，以将太阳能有效地转化为化学能。然而，固定催化位点和提高光捕获能力的载体的关键作用在光氧化还原转化中经常被忽略。在此，我们报告了使用球形 SiO ₂载体来设计 AuPd 合金颗粒（表示为 AuPd/SiO ₂)，在概念上不同于用于调节等离子 Au 或 AuPd 粒子的光学吸收的传统方法，以操纵 AuPd 粒子的光捕获能力，以实现高选择性和高效的光催化 Suzuki 交叉偶联反应。在这个精心设计的系统中，通常没有 AuPd 颗粒的尺寸和形状变化，负载的 AuPd 颗粒回收来自球形 SiO ₂载体的散射光，并实现显着的宽光捕获能力，而不是表面等离子体共振峰。工程化的 AuPd/SiO _{2与使用商业 SiO 2}载体相比，通过使用近场散射促进的光吸收的复合材料展示了可见光诱导的光催化 Suzuki 交叉偶联反应的显着增强活性，突出了球形载体效应诱导的有效利用的散射光。这项工作强调了通过近场散射促进的光吸收模型来操纵双金属颗粒的光捕获能力，以实现高效的光驱动铃木交叉偶联反应和其他 CC 偶联有机合成，以生产高附加值化学品的可行性。