The Suzuki-Miyaura cross-coupling reaction is an effective process for C-C bond formation in organic synthesis. Herein, we report a NiO nanodot-decorated Pd/SiC catalyst, synthesized by atomic layer deposition, which shows high photocatalytic activity for the Suzuki-Miyaura coupling of both aryl bromides and chlorides with phenylboronic acid at 30 °C in air. The Mott-Schottky contact in SiC/Pd enhances the rapid transfer of the photogenerated electrons from SiC to Pd nanoparticles. Moreover, the energy different between the highest occupied molecular orbital of the ultrafine NiO nanodots and the Fermi level of Pd forces a spontaneous electron transfer from NiO to Pd. As a result, the concentrated electrons in the Pd nanoparticles can facilitate the cleavage of C-Br or C-Cl bonds, which normally requires rather high temperatures in thermal processes. The holes left on the SiC support can assist the cleavage of the C-B bond.

铃木-宫浦的交叉偶联反应是有机合成中CC键形成的有效过程。在本文中，我们报道了一种通过原子层沉积合成的NiO纳米点修饰的Pd / SiC催化剂，该催化剂在30°C的空气中对芳基溴化物和氯化物与苯基硼酸的Suzuki-Miyaura偶联反应显示出高光催化活性。SiC / Pd中的Mott-Schottky接触增强了光生电子从SiC到Pd纳米颗粒的快速转移。此外，超细NiO纳米点的最高占据分子轨道与Pd的费米能级之间的能量差迫使电子自发地从NiO转移到Pd。结果，Pd纳米粒子中的集中电子可以促进C-Br或C-Cl键的裂解，通常在热处理过程中需要很高的温度。留在SiC载体上的孔可以帮助CB键断裂。