Citation: Yunxi Shi, Dongjie Cheng, Yi Liu, Xinyi Huang, Pan Wang, Zhenguo Li, Jizhou Jiang. Non-thermal plasma synergistic regeneration for Pt catalyst performance reconstruction[J]. Chinese Chemical Letters, ;2026, 37(8): 112246. doi: 10.1016/j.cclet.2025.112246 shu

Non-thermal plasma synergistic regeneration for Pt catalyst performance reconstruction

Yunxi Shi ^a ,
Dongjie Cheng ^a ,
Yi Liu ^a ,
Xinyi Huang ^a ,
Pan Wang ^a ,
Zhenguo Li ^b ,
Jizhou Jiang ^{c, *,}

a.
School of Automotive and Transportation Engineering, Jiangsu University, Zhenjiang 212013, China
b.
National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology and Research Center Co., Ltd., Tianjin 300300, China
c.
School of Materials Science and Engineering, State Key Laboratory of Green and Efficient Development of Phosphorus Resources, Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education, Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Novel Catalytic Materials of Hubei Engineering Research Center, Wuhan Institute of Technology, Wuhan 430205, China

027wit@163.com

Received Date: 20 August 2025
Revised Date: 4 December 2025
Accepted Date: 9 December 2025
Available Online: 10 December 2025

Figures(7)

Aging of Pt in diesel oxidation catalyst (DOC) leads to diminished catalytic activity, presenting a considerable challenge for catalyst regeneration and enhancement. This work investigates on the regeneration of Pt/Al₂O₃-SiO₂ (Pt/AS) catalysts in DOC utilizing the synergistic effect of the indirect non-thermal plasma (INTP) and direct non-thermal plasma (DNTP) to optimize catalytic performance for efficient and stable conversion of gaseous pollutants. The distinctive properties of DNTP-INTP promote the removal of surface particulate matter (PM) and increase the availability of adsorbed oxygen (O_ads) on the catalyst surface. Moreover, DNTP effectively reduces the particle size of sintered catalysts by applying a high-energy electric field. This process facilitates the conversion of PtO_x to metallic Pt⁰. Additionally, agglomerated Pt structures can be reverted into regular hexahedral nanoparticles through the synergistic process. The regenerated catalyst demonstrates exceptional catalytic performance and stability, which can rival the performance of newly prepared catalysts. Notably, compared to the aged catalyst, the low-temperature performance improves significantly, with a reduction of 90 ℃ in the temperature at the onset of catalytic activity. These results highlight the considerable potential of plasma-assisted synergistic catalysts regeneration for revitalizing aged DOC within the context of advancing clean energy technologies.
- Diesel oxidation catalysts,
- Sintering of Pt,
- Non-thermal plasma,
- Regeneration
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