Citation: ZHAO Tian-qi, GAO Qiang, LIAO Wei-ping, XU Xiu-feng. Effect of Nd-incorporation and K-modification on catalytic performance of Co₃O₄ for N₂O decomposition[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(9): 1120-1128. shu

Effect of Nd-incorporation and K-modification on catalytic performance of Co₃O₄ for N₂O decomposition

School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China

Corresponding author: XU Xiu-feng, xxf@ytu.edu.cn
Received Date: 6 May 2019
Revised Date: 10 July 2019

Fund Project: The project was supported by the Shandong Natural Science Foundation (ZR2017MB020) and Graduate Innovation Foundation of Yantai University (YDYB1909)the Shandong Natural Science Foundation ZR2017MB020Graduate Innovation Foundation of Yantai University YDYB1909

Figures(13)

Nd-Co₃O₄ catalysts were prepared by hydrothermal and co-precipitation methods to catalyze the decomposition of N₂O. The catalysts prepared by hydrothermal method showed higher activity. Among the hydrothermal Nd-Co₃O₄ catalysts, the catalyst with Nd/Co molar ratio of 0.01 had higher activity. 0.01Nd-Co₃O₄ catalyst was then impregnated by K₂CO₃ solution to prepare K-modified catalyst. The catalysts were characterized by means of X-ray diffraction (XRD), nitrogen physisorption, scanning electrons microscopy (SEM), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H₂-TPR), and oxygen temperature-programmed desorption (O₂-TPD). The results show that Nd-Co₃O₄ and K-modified catalysts exhibit spinel structure. In contrast to bare Nd-Co₃O₄, the K-modified catalyst with higher activity is due to its weaker strength of Co-O bond and easier desorption of surface oxygen species. In addition, over 90% conversion of N₂O can be reached over 0.02K/0.01Nd-Co₃O₄ at 350 ℃ for 40 h under the co-presence of oxygen and steam in feed gases.
- catalytic decomposition of N₂O,
- Nd-Co₃O₄ catalysts,
- K-modified catalysts,
- catalytic activity
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Effect of Nd-incorporation and K-modification on catalytic performance of Co₃O₄ for N₂O decomposition