fulltext.study @t Gmail

Shape effect of microstructured CeO2 with various morphologies on CO catalytic oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
51857 46856 2011 6 PDF Available
Title
Shape effect of microstructured CeO2 with various morphologies on CO catalytic oxidation
Abstract

Novel 3D-like CeO2 microflowers and microspheres were synthesized by facile precipitation methods and tested for CO oxidation. Characterization by UV-Vis, PL, XPS and H2-TPR revealed that 3D-like ceria show great superiority for favoring formation of oxygen vacancies, which in turn leads to higher oxygen mobility and reducibility. A direct relationship between the band gap of ceria and its catalytic activity towards CO oxidation was established. The activity and thermal stability of 3D-like ceria were much better than that of CeO2 nanoparticles. The results indicated that the highly active ceria could be obtained by turning their shapes with a high concentration of oxygen vacancies.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Novel 3D-like CeO2 microflowers and microspheres were synthesized by facile precipitation methods and tested for CO oxidation. ► They exhibit an excellent low-temperature activity toward CO oxidation compared with CeO2 nanoparticles. ► A direct relationship was established between the bandgap of CeO2 and its catalytic activity towards CO oxidation. ► The higher activity of CeO2-s or CeO2-f may be attributed to the shape effect of the CeO2 with various morphologies, resulting in the formation of abundant defects in the CeO2.

Keywords
CeO2 microflowers and microspheres; CO oxidation; Shape effect; Oxygen vacancies
First Page Preview
Shape effect of microstructured CeO2 with various morphologies on CO catalytic oxidation
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
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 14, 15 August 2011, Pages 1374–1379
Authors
, ,
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
Full-text PDF Download
Online Support
Any Questions? feel free to contact us