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CO catalytic oxidation over Pd/CeO2 with different chemical states of Pd

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Abstract

Three Pd/CeO2 catalysts were, respectively, prepared by reduction–deposition and impregnation method (IMP) to investigate the effect of chemical state of Pd on CO oxidation. Two kinds of surface Pd species, namely PdO and Pdδ+ (2 < δ ≤ 4) in PdxCe1−xO2, were identified in all Pd/CeO2 samples although their relative ratios in each sample were different. Surface PdxCe1−xO2 species were found to be very active for CO oxidation, and it could act as a channel by which active oxygen species can be transferred from CeO2 to Pd species for CO oxidation. Our results reveal that the preparation method can severely influence the chemical state of Pd which can further determine the activity for CO oxidation.

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Acknowledgements

This work was financially supported by the National Key Research and Development Program of China (No. 2016YFC0204300) and the National Natural Science Foundation of China (Nos. 21171055 and 21571061).

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Authors and Affiliations

  1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Guo-Feng Zhou

  2. Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai, 200237, China

    Jian Ma, Li Wang & Yun Guo

  3. Equipment R&D Center, China Nuclear Power Technology Research Institute, Shenzhen, 518000, China

    Shan Bai

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  1. Guo-Feng Zhou
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  2. Jian Ma
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  3. Shan Bai
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  4. Li Wang
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Correspondence to Guo-Feng Zhou.

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Zhou, GF., Ma, J., Bai, S. et al. CO catalytic oxidation over Pd/CeO2 with different chemical states of Pd. Rare Met. 39, 800–805 (2020). https://doi.org/10.1007/s12598-019-01347-7

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  • DOI: https://doi.org/10.1007/s12598-019-01347-7

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