New penta-and hexa-coordinated titanium sites in titanium silicalite-1 catalyst for propylene epoxidation
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DOI:
文献链接: https://doi.org/10.1016/j.apcatb.2023.122396
其他信息:
Y Wang, H Yang, Y Zuo, D Tian, G Hou, Y Su…
Applied Catalysis B …, 2023
Elsevier
Creating and identifying catalytically active titanium sites is vital to further enhance performance of titanium-containing zeolites, particularly for environmentally friendly titanium silicalite-1 catalyst (TS-1). Herein, we prepared a typical TS-1 with two new Ti-sites including the penta-coordinated Ti (OH) 2 (OSi) 3 and hexa-coordinated Ti (OH) 4 (OSi) 2. They are identified by UV resonance Raman spectroscopy and their coordination structures delineated by density functional theory calculations. Evaluated by propylene epoxidation to …
