>>Greening Oxidation Catalysis: Water as a Solvent for Efficient Alkene Epoxidation over a Titanosilicate/H2O2 System
题名：Greening Oxidation Catalysis: Water as a Solvent for Efficient Alkene Epoxidation over a Titanosilicate/H2O2 System
来源：ACS Sustainable Chemistry & Engineering
发表年代：2022
作者：Yunkai Yu, Nan Fang, Zhen Chen, Dongxu Liu, Yueming Liu, Mingyuan He
Abstract：Herein, we disclose the application of water (H2O) solvent in titanosilicate-catalyzed epoxidation of alkenes. A highly efficient H2O-solvent propylene epoxidation system (Ti-MWW/H2O/H2O2/propylene/K+) was achieved, possessing high activity, selectivity, and stability. Our investigation shows that this excellent catalytic performance is ascribed to the structure variation of H2O induced by K+. The superior H2O structure is the one that donates two and accepts one hydrogen bond (HB), which is known as the “DDA” H2O structure. This work benefits sustainable applications in titanosilicate-catalyzed alkene epoxidation and conforms to the principles of green chemistry.
