Catalytic cooperation between Ru and Pd atoms on hierarchical porous Ce-based oxide for boosting engine exhaust purification

Linsheng Xu, Tian Qin, Yuanfeng Li, Hao Guo, Qiao Hu, Jing Xiong, Yaxiao Ma, Peng Zhang, Xiaolin Yu (), Xi Liu, Yunpeng Liu (), Zhen Zhao, Jianping Zou and Yuechang Wei ()
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Linsheng Xu: China University of Petroleum
Tian Qin: Shanghai Jiao Tong University
Yuanfeng Li: China University of Petroleum
Hao Guo: China University of Petroleum
Qiao Hu: Shanghai Jiao Tong University
Jing Xiong: China University of Petroleum
Yaxiao Ma: China University of Petroleum
Peng Zhang: China University of Petroleum
Xiaolin Yu: University of Science and Technology Beijing
Xi Liu: Shanghai Jiao Tong University
Yunpeng Liu: Chinese Academy of Sciences
Zhen Zhao: China University of Petroleum
Jianping Zou: Nanchang Hangkong University
Yuechang Wei: China University of Petroleum

Nature Communications, 2025, vol. 16, issue 1, 1-13

Abstract: Abstract Simultaneous oxidation of soot and CH4 emitted from natural gas-diesel dual fuel engine is a new challenge. Herein, a robust catalyst of binary Ru-Pd components supported on three-dimensional ordered macro-mesoporous cerium-zirconium oxide (RuPd/3DOMM-CZO) is elaborately constructed. Ordered macro-mesopore structure in novel hierarchical porous cerium-zirconium oxide can respectively enhance mass transfer of soot and gaseous reactants, and binary Ru-Pd active components can improve activation for NO and CH4. RuPd/3DOMM-CZO catalyst exhibits excellent catalytic performance and stability during simultaneous soot and CH4 oxidation. Based on the results of characterizations and theoretical calculations, Ru site in binary Ru-Pd components is responsible for catalyzing NO oxidation to NO2, which is key step of NOx-assisted soot oxidation mechanism, while Pd site can activate the C-H bond of CH4 for boosting oxidation to CO2; the catalytic cooperation between Ru and Pd atoms can promote the rate-determining step to realize simultaneous oxidation of soot and CH4.

Date: 2025
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DOI: 10.1038/s41467-025-63089-8

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