低温合成钯单原子负载的SAPO-31催化剂及其在选择性加氢中的应用

Low-temperature synthesis of atomically dispersed palladium atoms over the SAPO-31 support and its application in selective hydrogenation reactions

单原子催化已成为异相催化的前沿热点之一。研究采用一种简易的低温合成方法制备钯单原子催化剂,通过低温抑制金属原子的迁移团聚,实现在SAPO-31载体上制备单原子催化剂。该催化剂在对溴苯乙炔、4-甲基苯乙炔及硝基苯选择性加氢反应中展现了优异的催化活性、选择性及转换频率。研究验证了低温合成法制备单原子催化剂的可行性,由于其制备方法简单,并且该单原子催化剂具有高催化活性,因而具有潜在的应用前景。

Supported single-atom catalysis have become one of the most exciting new frontiers in heterogeneous catalysis.Herein,we report an efficient and operationally simple low-temperature synthesis method for the construction of singly dispersed palladium atoms on SAPO-31 with exceptional selective hydrogenation performance.This catalyst showed excellent catalytic activity,selectivity,and turnover frequency in hydrogenation of bromo-4-ethynylbenzene,4-methylphenylene acetylene and nitrobenzene.This study demonstrates the feasibility of low-temperature synthesis of atomically dispersed metal species over the support,and how to tune the activity and selectivity of these materials to meet the needs of practical applications.