Citation: Xin Xing, Ting Zhao, Jie Cheng, Xiaoxiao Duan, Wenpeng Li, Ganggang Li, Zhongshen Zhang, Zhengping Hao. Promotional effect of Cu additive for the selective catalytic oxidation of n-butylamine over CeZrO_x catalyst[J]. Chinese Chemical Letters, ;2022, 33(6): 3065-3072. doi: 10.1016/j.cclet.2021.09.056 shu

Promotional effect of Cu additive for the selective catalytic oxidation of n-butylamine over CeZrO_x catalyst

Xin Xing ^{a, b} ,
Ting Zhao ^a ,
Jie Cheng ^{a, *,} ,
Xiaoxiao Duan ^a ,
Wenpeng Li ^a ,
Ganggang Li ^a ,
Zhongshen Zhang ^a ,
Zhengping Hao ^a

a.
National Engineering Laboratory for VOCs Pollution Control Material & Technology, Research Center for Environmental Material and Pollution Control Technology, University of Chinese Academy of Sciences, Beijing 101408, China
b.
College of Environmental Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China

jiecheng@ucas.ac.cn

Received Date: 26 July 2021
Revised Date: 20 August 2021
Accepted Date: 16 September 2021
Available Online: 23 September 2021

Figures(4)

The catalytic elimination of nitrogen-containing volatile organic compounds (NVOCs) still encounters bottlenecks in NO_x formation and low N₂ selectivity. Here, a series of Cu-promoted Ce-Zr mixed oxide catalysts were synthesized using a simple precipitation approach, and n-butylamine was adopted as the probe pollutant to evaluate their catalytic performance. The CeCu_10%ZrO_x catalyst exhibited the best catalytic activity, with 100% n-butylamine conversion and 90% N₂ selectivity at 250 ℃. Concurrently, this sample also displayed good water resistance. A detailed characterization of the catalyst was performed through a series of experimental studies and theoretical calculations. The addition of Cu increased the redox property and promoted the production of oxygen vacancies, all of which were favorable for the greatest n-butylamine selective catalytic oxidation performance. The changes of oxygen vacancies over CeCu_10%ZrO_x in reaction process were studied by in situ Raman spectra. Moreover, in situ diffuse reflectance infrared Fourier transform spectra (DRIFTs) and theoretical calculations were employed to explore the reaction mechanism of n-butylamine selective oxidation. The high activity and selectivity of this catalyst confirm the practical feasibility of the selective oxidation of n-butylamine to CO₂ and N₂, and the exploration of the reaction mechanism provides new insights into the further design of catalysts.
- N-Butylamine,
- CeCu_aZrO_x mixed oxide,
- Selective oxidation,
- Oxygen vacancies,
- Reaction mechanism
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Promotional effect of Cu additive for the selective catalytic oxidation of n-butylamine over CeZrOx catalyst

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通讯作者: 陈斌, bchen63@163.com

Promotional effect of Cu additive for the selective catalytic oxidation of n-butylamine over CeZrO_x catalyst