Citation: Baoming Zhao, Yanfei Jian, Zeyu Jiang, Reem Albilali, Chi He. Revealing the unexpected promotion effect of EuO_x on Pt/CeO₂ catalysts for catalytic combustion of toluene[J]. Chinese Journal of Catalysis, ;2019, 40(4): 543-552. doi: S1872-2067(19)63292-4 shu

Revealing the unexpected promotion effect of EuO_x on Pt/CeO₂ catalysts for catalytic combustion of toluene

a Xi'an Modern Chemistry Research Institute, Xi'an 710065, Shaanxi, China;
b State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China;
c Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam 31441, Saudi Arabia;
d National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, China

Received Date: 21 November 2018
Revised Date: 22 December 2018

Pt/Eu₂O₃-CeO₂ materials with different Eu concentrations were prepared and applied to toluene destruction, and the remarkable promotion impact of EuO_x on Pt/CeO₂ can be observed. The characterization results reveal that the presence of EuO_x significantly enhances the redox property, lattice O concentration, and Ce³⁺ ratio of the Pt/CeO₂ material, which facilitates the dispersion and activity of Pt active sites and thus accelerates the decomposition process of toluene. Among all catalysts, a sample with an Eu content of 2.5 at.% (Pt/EC-2.5) possesses the best catalytic activity with 0.09 vol% of toluene completely destructed at 200℃ under a relatively high GHSV of 50000 h^-1. The possible reaction pathway and mechanism of toluene combustion over Pt/Eu₂O₃-CeO₂ samples are presented according to in-situ DRIFTS, which confirms that the toluene oxidation process obeys the Mars-van Krevelen mechanism with aldehydes and ketones as primary organic intermediates.
- Pt/Eu₂O₃-CeO₂ material,
- Promotion effect,
- Toluene,
- Catalytic oxidation,
- In-situ DRIFTS,
- Reaction mechanism
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Revealing the unexpected promotion effect of EuOx on Pt/CeO2 catalysts for catalytic combustion of toluene

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通讯作者: 陈斌, bchen63@163.com

Revealing the unexpected promotion effect of EuO_x on Pt/CeO₂ catalysts for catalytic combustion of toluene