Redox property of Co3O4/CeO2 and the effect of reaction conditions on its performance in CO oxidation

SHAO Jian-jun; ZHU Xi; SHEN Wen-jie

Volume 40 Issue 01

Jan. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > 40(01): 75-79

SHAO Jian-jun, ZHU Xi, SHEN Wen-jie. Redox property of Co3O4/CeO2 and the effect of reaction conditions on its performance in CO oxidation[J]. Journal of Fuel Chemistry and Technology, 2012, 40(01): 75-79.

Citation:

SHAO Jian-jun, ZHU Xi, SHEN Wen-jie. Redox property of Co₃O₄/CeO₂ and the effect of reaction conditions on its performance in CO oxidation[J]. Journal of Fuel Chemistry and Technology, 2012, 40(01): 75-79.

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Redox property of Co₃O₄/CeO₂ and the effect of reaction conditions on its performance in CO oxidation

1.
Post-doctoral Scientific Research Station in 92493 Unit, Chinese People Liberation Army, Dalian 116041, China;
2.
Department of Naval Architecture &|Ocean Engineering, Naval University of Engineering, Wuhan 430033, China;
3.
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116041, China

Received Date: 2011-02-11
Rev Recd Date: 2011-05-27
Publish Date: 2012-01-31

Abstract

Abstract

Co₃O₄/CeO₂ catalysts were prepared by co-precipitation-oxidation method and characterized by using X-ray diffraction (XRD), surface area (S_BET) measurement and temperature-programmed reduction (TPR). The effect of cobalt content in Co₃O₄/CeO₂ on its physical properties and catalytic performance in CO oxidation was investigated under both the humid and dry conditions. The results indicated that the Co₃O₄/CeO₂ composite with a Co/Ce atomic ratio of 9 (calcined at 723 K) exhibits much smaller particle size and higher surface area than pure Co₃O₄; the addition of cerium to Co₃O₄ is beneficial to obtain Co₃O₄ with small particle size. The average particle size and BET surface area of Co₃O₄ in the Co₃O₄/CeO₂ composite (Co/Ce atomic ratio=9) calcined at 538 K are 7.2 nm and 167.6 m²/g, respectively. Accordingly, the Co₃O₄/CeO₂ composite exhibits excellent redox property.
- Co₃O₄,
- CeO₂,
- carbon monoxide,
- low temperature,
- oxidation

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References(24)

References

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