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NO decomposition by ultrafine noble metals dispersed on the rare earth phosphate hollow particles

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Abstract

Novel fine polymer particles containing ultrafine Pd, Pt or Rh metal dispersed on the core-shell [core, poly(styrene-co-acrylamide) or poly(styrene-co-acrylic acid); shell, LnPO4(Ln = Ce, Nd, Pr, Sm, La)] type microsphere were prepared by the emulsifier-free emulsion polymerization of styrene with acrylamide or acrylic acid followed by the addition of PdCl2, HPtCl6, or RhCl3 and finally by the addition of a mixture of Ln(NO3)3 and NaH2PO4. Pyrolysis of the resulting polymer particles at 700–900°C provides polymer-free hollow particles (diameter 450–550 nm) composed of noble metals and LnPO4. The excellent catalytic reduction of NO gas into N2 and O2 was observed at 500–700°C using the rersulting particles as catalyst.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan

    H. Tamai, T. Ikeya & F. Nishiyama

  2. Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan

    H. Yasuda

  3. Hiroshima Research & Development Center, Mitsubishi Heavy Industries, Nishi-ku, Hiroshima, 733-0036, Japan

    K. Iida & S. Nojima

Authors
  1. H. Tamai
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  2. T. Ikeya
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  3. F. Nishiyama
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  4. H. Yasuda
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  5. K. Iida
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  6. S. Nojima
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Tamai, H., Ikeya, T., Nishiyama, F. et al. NO decomposition by ultrafine noble metals dispersed on the rare earth phosphate hollow particles. Journal of Materials Science 35, 4945–4953 (2000). https://doi.org/10.1023/A:1004886526496

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