Effect of preparation parameters on the catalytic performance of hydrothermally synthesized Co3O4 in the decomposition of N2O

LI He-jian; ZHENG Li; ZHAO Tian-qi; XU Xiu-feng

Volume 46 Issue 6

Jun. 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(6): 717-724

LI He-jian, ZHENG Li, ZHAO Tian-qi, XU Xiu-feng. Effect of preparation parameters on the catalytic performance of hydrothermally synthesized Co3O4 in the decomposition of N2O[J]. Journal of Fuel Chemistry and Technology, 2018, 46(6): 717-724.

Citation:

LI He-jian, ZHENG Li, ZHAO Tian-qi, XU Xiu-feng. Effect of preparation parameters on the catalytic performance of hydrothermally synthesized Co₃O₄ in the decomposition of N₂O[J]. Journal of Fuel Chemistry and Technology, 2018, 46(6): 717-724.

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Effect of preparation parameters on the catalytic performance of hydrothermally synthesized Co₃O₄ in the decomposition of N₂O

School of Chemistry and Chemical Engineering, Institute of Applied Catalysis, Yantai University, Yantai 264005, China

Funds:

the Shandong Provincial Natural Science Foundation ZR2017MB020

Graduate Innovation Foundation of Yantai University YDZD1816

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Corresponding author: XU Xiu-feng, E-mail: xxf@ytu.edu.cn
Received Date: 2018-02-24
Rev Recd Date: 2018-05-01

Available Online: 2021-01-23

Publish Date: 2018-06-10

Abstract

Abstract

With hexadecyl trimethyl ammonium bromide (CTAB) as the template, cobaltosic oxide precursors were hydrothermally synthesized. Co₃O₄ catalysts were then prepared by calcining the cobaltosic oxide precursors, which was further modified by impregnation with K₂CO₃ solution and used in the decomposition of N₂O. The catalysts were characterized by means of X-ray diffraction (XRD), nitrogen physisorption, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H₂-TPR), and oxygen temperature-programmed desorption (O₂-TPD); the effect of CTAB concentration, CTAB/cobalt molar ratio and urea/cobalt molar ratio on the catalytic activity of Co₃O₄ was investigated. The results indicated that the Co₃O₄ catalyst prepared by using 0.05 mol/L CTAB solution, with a CTAB to cobalt molar ratio of 1 and a urea to cobalt molar ratio of 4, exhibits high activity in N₂O decomposition. The catalytic performance of Co₃O₄ can be further enhanced by modifying with K. Over the 0.02 K/Co₃O₄ catalyst, the N₂O conversion remains over 91% at 400 ℃ after conducting the N₂O decomposition reaction for 50 h in the presence of oxygen and steam.
- Co₃O₄,
- hydrothermal synthesis,
- preparation parameters,
- catalytic decomposition,
- N₂O

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References(21)

References

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