Performance research of MnOx/Co3O4 composites within nanosheets for catalytic soot combustion

ZHANG Nianchen; WANG Chen; HAN Mengyu; QIU Jianqiang; WANG Jinguo

doi:10.12299/jsues.24-0127

Volume 39 Issue 3

Sep. 2025

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Article Navigation > Journal of Shanghai University of Engineering Science > 2025 > 39(3): 333-340

ZHANG Nianchen, WANG Chen, HAN Mengyu, QIU Jianqiang, WANG Jinguo. Performance research of MnOx/Co3O4 composites within nanosheets for catalytic soot combustion[J]. Journal of Shanghai University of Engineering Science, 2025, 39(3): 333-340. doi: 10.12299/jsues.24-0127

Citation:

ZHANG Nianchen, WANG Chen, HAN Mengyu, QIU Jianqiang, WANG Jinguo. Performance research of MnO_x/Co₃O₄ composites within nanosheets for catalytic soot combustion[J]. Journal of Shanghai University of Engineering Science, 2025, 39(3): 333-340. doi: 10.12299/jsues.24-0127

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Performance research of MnO_x/Co₃O₄ composites within nanosheets for catalytic soot combustion

doi: 10.12299/jsues.24-0127

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

Received Date: 2023-12-04
Available Online: 2025-12-22
Publish Date: 2025-09-30

Abstract

Abstract

Catalytic combustion is presently considered as one of the most effective methods to control soot particles from diesel exhaust, while its key issue is how to construct efficient catalysts. Herein, a series of MnO_x/Co₃O₄ composites within nanosheets were prepared using the hydrothermal integrating with wet-impregnation approach, chiefly aiming to catalyze soot purification. Experimental results indicate that, 20MnCo nanosheet composites with Mn/Co molar ratio of 20% show the optimal soot purification performance with T_m of 354 ℃ and 100% CO₂ selectivity, mainly attributing to the three aspects: 1) porous nanosheets with high surface area and rich pores not merely improved the contact area of composites and soot, but also benefited the decreased mass transfer resistance of gas reactants; 2) loading MnO_x led to the increased ratio of Mn³⁺ and Co³⁺ on composite’s surface, which favored the activating the adsorbed oxygen species on composite’s surface to generate more reactive oxygen species; 3) loading MnO_x resulted in the improved redox ability that facilitated NO oxidation to produce NO₂. Meanwhile, 20MnCo nanosheet composites demonstrated the good recycling stability, showing a good application prospect.
- soot particles,
- catalytic combustion,
- MnO_x/Co₃O₄ composites,
- porous nanosheets,
- diesel exhaust

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References(21)

References

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