Journal
ACS CATALYSIS
Volume 8, Issue 12, Pages 11979-11986Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.8b03002
Keywords
concerted benzene C-H functionalization; selective phenol synthesis; confined single site catalysis; alkali and alkaline earth metal ions/zeolite
Categories
Funding
- JSPS/MEXT [16F16078, 16F16383]
- JSPS Postdoctoral Fellowship for Foreign Researchers
- Grants-in-Aid for Scientific Research [16F16383, 16F16078] Funding Source: KAKEN
Ask authors/readers for more resources
The well-known cumene process via an explosive cumene hydroperoxide intermediate in liquid phase currently employed for phenol production is energy-intensive and not environmentally friendly. Therefore, there is a demand for an alternative single-step gas-phase catalysis process. According to the conventional catalysis concept, selective oxidation reactions are promoted by redox catalysts and not by acid-base catalysts. In general, alkali and alkaline earth metal ions cannot activate each of benzene, O-2 and N2O when they adsorb separately. However, we observed an unprecedented catalysis of single alkali and alkaline earth metal ion sites incorporated into zeolite pores for the selective oxidation of benzene to phenol with N2O and O-2 + NH3, thereby providing a single-site catalytic platform with high selectivity. Among alkali and alkaline earth metal ions, single Cs+ and Rb+ sites with ion diameters of >300 pm in the pores of beta-zeolites exhibited remarkable selectivity for benzene C-H activation to phenol catalysis in a concerted reaction pathway.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available