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. shu

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

Corresponding author: XU Xiu-feng, xxf@ytu.edu.cn
Received Date: 24 February 2018
Revised Date: 1 May 2018

Fund Project: Graduate Innovation Foundation of Yantai University YDZD1816The project was supported by the Shandong Provincial Natural Science Foundation (ZR2017MB020) and Graduate Innovation Foundation of Yantai University (YDZD1816)the Shandong Provincial Natural Science Foundation ZR2017MB020

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

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