Catalysis Communications ( IF 3.7 ) Pub Date : 2018-05-26 , DOI: 10.1016/j.catcom.2018.05.012 Xiangqing Fang , Lizhi Wu , Yunkai Yu , Le Sun , Yueming Liu
A facile strategy is carried out to improve the performance of TS-1 via implanting heteroatom Zn in alkaline conditions. The Zn modified TS-1 exhibits an excellent activity and selectivity in the alkene epoxidation. Combined with various investigations, such a good performance mainly is attributed to the promoted electropositivity near the Ti sites and the more relaxed structure near Ti sites in TS-1-Zn, which are beneficial to facilitate the active intermediate formation. The better selectivity of epoxides could mainly be ascribed to the neutralization of acid sites with Zn species. And the strategy is successfully applied to Ti-MWW.
中文翻译:
通过Zn(AC)2改性提高TS-1的催化性能
通过在碱性条件下注入杂原子Zn,可以采取一种简便的策略来提高TS-1的性能。锌修饰的TS-1在烯烃环氧化中表现出出色的活性和选择性。结合各种研究,这种良好的性能主要归因于TS-1-Zn中Ti位附近的正电性增强和Ti位附近的更松弛的结构,这有利于促进活性中间体的形成。环氧化物的较好选择性主要归因于用锌物种中和酸位。并且该策略已成功应用于Ti-MWW。