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Effects of Support Preparation Methods on Structural and Catalytic Properties of Au/MnOx–CeO2

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Abstract

The preparation method for the heterogeneous catalysts makes a crucial role in catalytic activities. Here, we applied the co-precipitation, sol–gel, and impregnation method to prepare a series of MnOx–CeO2 supports with different Ce: Mn atom ratios at 9:1 and 8:2. After loaded with 1 wt% of Au, the obtained Au/MnOx–CeO2 were evaluated for low-temperature CO oxidation and water–gas shift reaction. Nitrogen adsorption, X-ray diffraction (XRD), Raman spectroscopy, temperature-programmed reduction (TPR), and Transmission Electron Microscopy Energy Dispersive Spectroscopy (TEM-EDS) showed that co-precipitation gave the formation of homogeneous distribution of active sites of MnOx–CeO2 oxides and the doping of Mn led to the formation of fluorite-type solid. The Au/C8M2-C catalyst prepared by co-precipitation performed best in low-temperature CO oxidation and water–gas shift reaction, which may be due to the homogeneous distribution of active sites. The doped Mn also demonstrated a great improvement over the low-temperature CO oxidation, implying the strengthened redox-oxidation capabilities.

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Acknowledgements

The authors would like to acknowledge the financial support of the National Natural Science Foundation of China (Grant No. 5220060683 and 22002133), Natural Science Foundation of Jiangsu Province (Grant No. BK20220837) and Fundamental Research Funds for the Central Universities (3203002211A1).

Funding

National Natural Science Foundation of China, 22002133, 5220060683, Natural Science Foundation of Jiangsu Province, BK20220837, Fundamental Research Funds for the Central Universities, 3203002211A1.

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Authors and Affiliations

  1. MOE Key Laboratory of Energy Thermal Conversion & Control, School of Energy and Environment, Southeast University, Nanjing, 210096, China

    Zhicheng Luo

  2. College of Chemistry and Chemical Engineering, Yantai University, 30 Qingquan Road, Yantai, 264005, Shandong, China

    Zhiguo Zhu

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  1. Zhicheng Luo
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  2. Zhiguo Zhu
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Correspondence to Zhiguo Zhu.

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Luo, Z., Zhu, Z. Effects of Support Preparation Methods on Structural and Catalytic Properties of Au/MnOx–CeO2. Catal Lett 154, 422–429 (2024). https://doi.org/10.1007/s10562-023-04309-y

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