Performance study of catalytic soot combustion using M0.3Co2.7O4 solid solution nanocrystals

ZHANG Nianchen; WANG Chen; HAN Mengyu; SUN Honghua; WANG Jinguo

doi:10.12299/jsues.24-0128

Volume 39 Issue 4

Dec. 2025

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Article Navigation > Journal of Shanghai University of Engineering Science > 2025 > 39(4): 420-427

ZHANG Nianchen, WANG Chen, HAN Mengyu, SUN Honghua, WANG Jinguo. Performance study of catalytic soot combustion using M0.3Co2.7O4 solid solution nanocrystals[J]. Journal of Shanghai University of Engineering Science, 2025, 39(4): 420-427. doi: 10.12299/jsues.24-0128

Citation:

ZHANG Nianchen, WANG Chen, HAN Mengyu, SUN Honghua, WANG Jinguo. Performance study of catalytic soot combustion using M_0.3Co_2.7O₄ solid solution nanocrystals[J]. Journal of Shanghai University of Engineering Science, 2025, 39(4): 420-427. doi: 10.12299/jsues.24-0128

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Performance study of catalytic soot combustion using M_0.3Co_2.7O₄ solid solution nanocrystals

doi: 10.12299/jsues.24-0128

School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Received Date: 2024-05-02
Available Online: 2026-02-02
Publish Date: 2025-12-01

Abstract

Abstract

Transition-metal ion M (M = Cu、Ni) doped M_0.3Co_2.7O₄ solid solution nanocrystals were prepared by a one-pot hydrothermal route. The effect of M doping on the catalytic performance of Co₃O₄ nanocrystals for soot combustion was systematically investigated. Results indicate that Cu_0.3Co_2.7O₄ nanocrystals exhibit the optimal catalytic performance with a T_m of 421 ℃ and 100% CO₂ selectivity. It was mainly attributed to the following aspects: 1) Cu ion doping inhibited the crystal growth of Co₃O₄ and increased the specific surface area, thereby expanding the contact between the catalyst and soot particles; 2) Cu ion doping increased the molar ratio of surface Co³⁺ and created more defect sites, facilitating the adsorption and activation of oxygen species; 3) Cu ion doping enhanced the redox ability of the catalyst, which not only promoted the generation of active oxygen species but also enhanced the oxidation of NO to NO₂, thereby improving the soot combustion efficiency. Meanwhile, Cu_0.3Co_2.7O₄ solid solution nanocrystals showed good stability, providing a theoretical basis for designing high-efficiency diesel soot purification catalysts.
- catalytic combustion,
- soot particle,
- transition-metal ions,
- solid solution,
- nanocrystal

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References(23)

References

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