Abstract
In this work, the potassium promoted Fe–Ce composite oxides supported on the monolithic three-dimensional (3D) macroporous nickel foam substrates (KFeCe@NF) were synthesized by sequential wetness impregnation method and used for catalytic soot combustion. The best catalytic performance was obtained over K(0.1)FeCe@NF catalyst under 10%H2O/800ppmNO/20%O2/N2 atmosphere using a wet contact mode and the lowest T10, T50 and T90 values could reduce to 274 ℃, 313 ℃ and 353 ℃, respectively. A detailed comparison of the structural properties for the samples before and after potassium loading was conducted by XRD, FESEM, EDS and XPS. The addition of K could lead to reduction of partial Fe2O3 to FeO and make the Fe2O3 nanosheets transform into agglomerated nanoparticles. Moreover, the enhanced catalytic performance of KFeCe@NF for soot combustion is main due to the abundant active oxygen species inspired by the strong interaction between potassium and transition metal oxides.
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Acknowledgements
The authors would like to acknowledge the Anhui Provincial Discipline (Professional) Top Talent Academic Funding Project (gxbjZD2021062), the Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (2020-KF-28), the Natural Science Foundation of Anhui Education Department (KJ2019A0558) and the open fund of AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials (ZD2021004).
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Wei, K., Wang, X., Shi, L. et al. Potassium promoted Fe–Ce composite oxides monolithic catalysts for catalytic soot combustion. Chem. Pap. 77, 7045–7052 (2023). https://doi.org/10.1007/s11696-023-02995-x
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DOI: https://doi.org/10.1007/s11696-023-02995-x