Enhancing the catalytic efficiency of the Heck coupling reaction by forming 5 nm Pd octahedrons using kinetic control

Heterogeneous catalysis occurs through a process of interfacial reactions; therefore, both surface facet and size control can increase catalytic efficiency. Octahedral Pd nanocrystals, enclosed by {111} facets, should be the ideal geometrical shape for Heck coupling reactions; however, it is challenging to synthesize 5 nm Pd octahedrons with a relatively uniform size distribution using existing capping-agent techniques. Here, we used palladium as a model system to investigate how the kinetics of atomic addition could be precisely controlled using a syringe pump. As a result, our method produced Pd octahedrons as small as 5 nm, which increased the catalytic efficiency of Heck coupling reactions while reducing the weight of catalyst used.

异构的催化作用通过界面的反应的一个过程发生；因此，表面方面和尺寸控制能增加催化效率。八面的 Pd nanocrystals，围住由 { 111 } 方面，应该是理想的几何形状为哎呀联合反应；然而，综合是挑战性的有用存在帽子代理人技术的相对一致的尺寸分布的 5 nm Pd 八面体。这里，我们把钯用作一个模型系统调查原子增加的动力学怎么能精确用注射泵被控制。作为结果，我们的方法生产了象 5 nm 一样小的 Pd 八面体，它增加了催化效率哎呀当减少使用的催化剂的重量时，联合反应。