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

Hongjing Wu; Liuding Wang

doi:10.1016/j.catcom.2011.05.018

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

Hongjing Wu, Liuding Wang

School of Physical Science and Technology

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

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.

Original language	English
Pages (from-to)	1374-1379
Number of pages	6
Journal	Catalysis Communications
Volume	12
Issue number	14
DOIs	https://doi.org/10.1016/j.catcom.2011.05.018
State	Published - 15 Aug 2011

Keywords

CeO microflowers and microspheres
CO oxidation
Oxygen vacancies
Shape effect

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10.1016/j.catcom.2011.05.018

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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.",

keywords = "CeO microflowers and microspheres, CO oxidation, Oxygen vacancies, Shape effect",

author = "Hongjing Wu and Liuding Wang",

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T1 - Shape effect of microstructured CeO2 with various morphologies on CO catalytic oxidation

AU - Wu, Hongjing

AU - Wang, Liuding

PY - 2011/8/15

Y1 - 2011/8/15

N2 - 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.

AB - 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.

KW - CeO microflowers and microspheres

KW - CO oxidation

KW - Oxygen vacancies

KW - Shape effect

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DO - 10.1016/j.catcom.2011.05.018

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AN - SCOPUS:79957889043

SN - 1566-7367

VL - 12

SP - 1374

EP - 1379

JO - Catalysis Communications

JF - Catalysis Communications

IS - 14

ER -

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

Abstract

Keywords

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