Citation: Jing Xiong, Zhenguo Li, Peng Zhang, Qi Yu, Kaixiang Li, Yilin Zhang, Zhen Zhao, Jian Liu, Jianmei Li, Yuechang Wei. Optimized Pt-MnO_x interface in Pt-MnO_x/3DOM-Al₂O₃ catalysts for enhancing catalytic soot combustion[J]. Chinese Chemical Letters, ;2021, 32(4): 1447-1450. doi: 10.1016/j.cclet.2020.10.014 shu

Optimized Pt-MnO_x interface in Pt-MnO_x/3DOM-Al₂O₃ catalysts for enhancing catalytic soot combustion

Jing Xiong ^{a, b, 1} ,
Zhenguo Li ^{a, 1} ,
Peng Zhang ^b ,
Qi Yu ^b ,
Kaixiang Li ^a ,
Yilin Zhang ^b ,
Zhen Zhao ^b ,
Jian Liu ^b ,
Jianmei Li ^b ,
Yuechang Wei ^{a, b, *,}

a.
National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center Co., Ltd., Tianjin 300300, China
b.
State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China

weiyc@cup.edu.cn

Received Date: 7 August 2020
Revised Date: 7 September 2020
Accepted Date: 12 October 2020
Available Online: 13 October 2020

Figures(3)

The catalysts of three-dimensionally ordered macroporous (3DOM) Al₂O₃-supported core-shell structured Pt@MnO_x nanoparticles (3DOM-Pt@MnO_x/Al₂O₃) were successfully prepared by the gas bubbling-assisted membrane reduction-precipitation (GBMR/P) method. Pt@MnO_x core-shell nanoparticles (NPs) are highly dispersed on the inner surface of 3DOM-Al₂O₃ support. Pt@MnO_x/3DOM-Al₂O₃ catalysts, which combine both advantages of high-efficiency soot-catalyst contact by 3DOM-Al₂O₃ structure and the abundant active sites by the optimized Pt-MnO_x interface, exhibit high catalytic activities for soot combustion, and the catalytic activities are strongly dependent on the thickness of MnO_x shell. Among the catalysts, 3DOM-Pt@MnO_x/Al₂O₃-1 catalyst with optimized Pt-MnO_x interface shows the highest catalytic activity for soot combustion, i.e., its values of T₅₀ and S^m are 351 ℃ and 98.6%, respectively. The highest density of Pt-MnO_x active sites for adsorption-activation of gaseous O₂ is responsible for enhancing catalytic activity for soot combustion. Pt@MnO_x/3DOM-Al₂O₃ catalysts are promising to practical applications for the emission reduction of soot particles.
- 3DOM material,
- Platinum,
- Manganese oxide,
- Strong metal-oxide interaction,
- Soot combustion
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沈阳化工大学材料科学与工程学院沈阳 110142

Optimized Pt-MnOx interface in Pt-MnOx/3DOM-Al2O3 catalysts for enhancing catalytic soot combustion

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通讯作者: 陈斌, bchen63@163.com

Optimized Pt-MnO_x interface in Pt-MnO_x/3DOM-Al₂O₃ catalysts for enhancing catalytic soot combustion