Effect of reduction-oxidation pretreatment on the catalytic performance of Co3O4 catalyst in N2O decomposition

ZHENG Ke; WANG Yong-zhao; HU Xiao-bo; WU Rui-fang; LIU Xiao-li; ZHAO Yong-xiang

Volume 47 Issue 4

Apr. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(4): 455-463

ZHENG Ke, WANG Yong-zhao, HU Xiao-bo, WU Rui-fang, LIU Xiao-li, ZHAO Yong-xiang. Effect of reduction-oxidation pretreatment on the catalytic performance of Co3O4 catalyst in N2O decomposition[J]. Journal of Fuel Chemistry and Technology, 2019, 47(4): 455-463.

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ZHENG Ke, WANG Yong-zhao, HU Xiao-bo, WU Rui-fang, LIU Xiao-li, ZHAO Yong-xiang. Effect of reduction-oxidation pretreatment on the catalytic performance of Co₃O₄ catalyst in N₂O decomposition[J]. Journal of Fuel Chemistry and Technology, 2019, 47(4): 455-463.

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Effect of reduction-oxidation pretreatment on the catalytic performance of Co₃O₄ catalyst in N₂O decomposition

ZHENG Ke^{1, 2},
WANG Yong-zhao^{1
,
,},
HU Xiao-bo^{1, 2},
WU Rui-fang¹,
LIU Xiao-li^{1, 2},
ZHAO Yong-xiang¹

1.
Engineering Research Center of Ministry of Education for Fine Chemicals, Taiyuan 030006, China
2.
School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China

Funds:

the National Natural Science Foundation of China U1710221

More Information

Corresponding author: WANG Yong-zhao, Tel: 0351-7010588, E-mail: catalyst@sxu.edu.cn
Received Date: 2018-12-21
Rev Recd Date: 2019-02-25

Available Online: 2021-01-23

Publish Date: 2019-04-10

Abstract

Abstract

In this paper, Co₃O₄ catalysts were prepared by the liquid precipitation method, and further was subjected to reduction-oxidation pretreatment to obtain Co₃O₄-RO. The catalysts were characterized by XRD, N₂-physisorption, Raman, H₂-TPR, XPS and O₂-TPD. Their catalytic activities in N₂O decomposition were tested on a fixed-bed continuous flow microreactor. The results show that both the crystallinity and the crystallite size of Co₃O₄-RO decrease in comparison with Co₃O₄. Especially the structural reconstruction resulted from the reduction-oxidation pretreatment weakens the Co-O bond and enhances the oxygen desorption capacity on the catalyst surface, which endows the Co₃O₄-RO a lower activation energy. Thus the catalytic activity of the Co₃O₄-RO in N₂O decomposition increases significantly. At the same time, Co₃O₄-RO shows strong resistance to O₂ (2% in feed)and H₂O (2.3% in feed).
- Co₃O₄,
- reduction-oxidation pretreatment,
- catalytic decomposition of N₂O

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References(38)

References

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