Su Yu, Li Ying, Li Chunping, Xu Tong, Sun Yinghui, Bai Jie
College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, People's Republic of China.
Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, People's Republic of China.
ACS Omega. 2022 Aug 15;7(34):29747-29754. doi: 10.1021/acsomega.2c02400. eCollection 2022 Aug 30.
The stability of metal nanoparticles is one of the key issues for their catalytic applications. In this study, we fabricated a sandwich structure to protect the metal nanoparticles. A carbon layer was used to wrap the PdNi nanoparticles on the carbon fiber, and the whole preparation process was simple and green. Electron transfer occurs between the carbon layer and the metal nanoparticles, making the two more closely combined. As a catalyst for the Suzuki reaction, it exhibits highly efficient catalysis and excellent stability. The calculated TOF reaches 18 662 h. After nine cycles, there was almost no decrease in performance. Additionally, we found that the addition of iodobenzene into the chlorobenzene reaction system could significantly improve the chlorobenzene conversion, and we proved that the catalyst has fine activity and stability with a bright future in commercial applications. The possible catalytic mechanism of Suzuki reaction was proposed based on experimental results. This study provides a simple and green method to prepare encapsulated metal nanoparticle catalysts and gives a deep insight into Suzuki reaction.
金属纳米颗粒的稳定性是其催化应用的关键问题之一。在本研究中，我们制备了一种三明治结构来保护金属纳米颗粒。使用碳层包裹碳纤维上的PdNi纳米颗粒，整个制备过程简单且绿色。碳层与金属纳米颗粒之间发生电子转移，使两者结合更紧密。作为铃木反应的催化剂，它表现出高效催化和优异的稳定性。计算得到的TOF达到18 662 h⁻¹。经过九个循环后，性能几乎没有下降。此外，我们发现向氯苯反应体系中加入碘苯可以显著提高氯苯转化率，并且证明该催化剂具有良好的活性和稳定性，在商业应用中具有广阔前景。基于实验结果提出了铃木反应可能的催化机理。本研究提供了一种制备封装金属纳米颗粒催化剂的简单绿色方法，并对铃木反应有了深入了解。
