The oxidation of cyclohexene was studied using nanostructured CeO2, CeO2/SiO2, CeO2-Sm2O3, and CeO2-Sm2O3/SiO2 catalysts. The CeO2-Sm2O3/SiO2 catalyst shows ~ 96% cyclohexene conversion and ~ 91% selectivity to allylic products, namely, 2-cyclohexen-1-one (~ 53%) and 2-cyclohexen-1-ol (~ 38%) owing to favorable redox (oxygen vacancies) and acid sites stimulated by synergistic interactions of dopant (Sm) and support (SiO2) with CeO2. In contrast, only ~ 40, ~ 55, and ~ 78% of cyclohexene conversions were observed, respectively, over CeO2, CeO2/SiO2, and CeO2-Sm2O3 catalysts. With the increase of reaction time, temperature, and molar ratio of cyclohexene/oxidant, the conversion of cyclohexene and the selectivity of 2-cyclohexen-1-one are increased considerably. © 2017 Elsevier B.V.

Sudarsanam Putla

Department of Chemistry

B. Govinda Rao

P.R.G. Nallappareddy

M. Yugandhar Reddy

T. Venkateshwar Rao

B.M. Reddy

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Catalysis Communications

Selective allylic oxidation of cyclohexene catalyzed by nanostructured Ce-Sm-Si materials

Journal	Data powered by TypesetCatalysis Communications
Publisher	Data powered by TypesetElsevier B.V.
ISSN	15667367