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Zr-doped CeO2 nanorods as versatile catalyst in the epoxidation of styrene with tert-butyl hydroperoxide as the oxidant

Paper ID Volume ID Publish Year Pages File Format Full-Text
39253 45815 2015 7 PDF Available
Title
Zr-doped CeO2 nanorods as versatile catalyst in the epoxidation of styrene with tert-butyl hydroperoxide as the oxidant
Abstract

•Zr-doped CeO2 nanorods in the selective oxidation of styrene to styrene oxide.•Zr content affects the intrinsic nature and activity.•Zr-doped ceria nanorods exhibited high activity and stability.•Ce3+ coupled with large sized oxygen vacancy clusters are active sites.•The mechanism for the epoxidation of styrene was proposed.

The CeO2 nanorods with various Zr dopant concentrations were studied in terms of their activity in the selective oxidation of styrene to styrene oxide using tert–butyl hydroperoxide as the oxidant. Several techniques were used to characterize the synthesized Zr-doped CeO2 nanorods. The results indicated that Zr ions were doped into the ceria lattice and formed fluorite-like solid solutions, resulting in an increase in oxygen vacancy concentration. It was also found that Zr content has a significant impact on intrinsic natures of the catalyst, namely, the specific surface area, oxygen vacancy concentration and the content of Ce3+ ions, which were found to determine the catalytic efficiency of the catalyst in the epoxidation of styrene. It is interesting that the remarkably increased catalytic performance of the ceria nanorods with 10 mol% zirconium is mainly attributed to the more oxygen vacancy and the higher percentage of Ce3+. Furthermore, recycling studies proved the heterogeneous zirconium-doped ceria nanorods did not lose the initial high catalytic activity after five successive recycles.

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Keywords
Zr-doped CeO2 nanorods; Styrene; Oxygen vacancies; Selective oxidation; TBHP
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Zr-doped CeO2 nanorods as versatile catalyst in the epoxidation of styrene with tert-butyl hydroperoxide as the oxidant
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 503, 25 August 2015, Pages 117–123
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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