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Role of cobalt on γ-Al2O3 based NO x storage catalyst

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Co/Pt/Ba/γ-Al2O3, Co/Ba/γ-Al2O3, Pt/Ba/γ-Al2O3, Co/Pt/γ-Al2O3, Ba/γ-Al2O3, Pt/γ-Al2O3, and Co/γ-Al2O3 type catalysts were prepared by a conventional impregnation method, and their NO x storage capacities were evaluated by colorimetric assay. Co-containing catalysts had a higher NO x storage capacity than that of Co-free counterparts. The role of each component, especially Co, for the catalysts prepared was investigated by using in-situ FTIR. The high NO x storage for Co-containing catalysts including Co/Ba/γ-Al2O3 and Co/Pt/Ba/γ-Al2O3 is mainly due to the formation of Co3O4 on the catalyst surface identified by XAFS.

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Authors and Affiliations

  1. School of Environmental Science and Engineering/Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Korea

    Joo-Hyoung Park, Hyun Ju Cho, Sang Jun Park & In-Sik Nam

  2. Research & Development Division for Hyundai Motors Company & Kia Motors Corporation, Yongin-Si, Korea

    Gwon Koo Yeo, Jeong Ki Kil & Young Kee Youn

Authors
  1. Joo-Hyoung Park
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  2. Hyun Ju Cho
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  3. Sang Jun Park
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  4. In-Sik Nam
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  5. Gwon Koo Yeo
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  6. Jeong Ki Kil
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  7. Young Kee Youn
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Correspondence to In-Sik Nam.

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Park, JH., Cho, H.J., Park, S.J. et al. Role of cobalt on γ-Al2O3 based NO x storage catalyst. Top Catal 42, 61–64 (2007). https://doi.org/10.1007/s11244-007-0152-8

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  • DOI: https://doi.org/10.1007/s11244-007-0152-8

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