Epoxidation of olefins on catalysts with highly isolated transition metal ions
Li, C
KeywordOlefin Epoxidation Highly Isolated TransitIon Metal Ion Framework Atom Ion Beam implantatIon Chemical Grafting Ultraviolet Raman Spectroscopy Styrene Cyclohexene
Indexed BySCI
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
AbstractThe framework transition metal ions in microporous and mesoporous materials such as Ti-Silicalite-1 (TS-1), Fe-ZSM-5 and V-MCM-41 have been identified based on the UV resonance Raman spectroscopy. It is pointed out that the conventionally used IR (Raman) band at 960 cm(-1) is not directly associated with the framework titanium ions in TS-1, while a resonance Raman band at 1125 cm(-1) is found to be essentially due to the asymmetric vibration of framework Ti-O-Si. To mimic the highly isolated transition metal ions in the framework of zeolites, Ti/SiO2, Fe/SiO2 and V/SiO2 catalysts were prepared using ion beam implantation and Ti/SiO2 and Si/Ti/SiO2 catalysts were prepared by chemical grafting. These catalysts show pretty high activity and selectivity for the epoxidation of styrene and cyclohexene using H2O2 as the oxidant. This work further confirms that the highly isolated transition metal ions are selective and active for the selective oxidation using H2O2 (ROOH) as the oxidant and the catalysts with highly isolated transition metal ions can be prepared with alternative methods instead of zeolitic synthesis.
WOS IDWOS:000171867100018
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Li, C. Epoxidation of olefins on catalysts with highly isolated transition metal ions[J]. CHINESE JOURNAL OF CATALYSIS,2001,22(5):479-483.
APA Li, C.(2001).Epoxidation of olefins on catalysts with highly isolated transition metal ions.CHINESE JOURNAL OF CATALYSIS,22(5),479-483.
MLA Li, C."Epoxidation of olefins on catalysts with highly isolated transition metal ions".CHINESE JOURNAL OF CATALYSIS 22.5(2001):479-483.
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