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2001 Fiscal Year Final Research Report Summary

Novel preparation method for supported metal catalysts with high resistance to sintering

Research Project

Project/Area Number 12450328
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 触媒・化学プロセス
Research InstitutionKyushu University

Principal Investigator

KISHIDA Masahiro  Kyushu University, Graduate School of Engineering, Assistant Professor, 大学院・工学研究院, 助教授 (60243903)

Co-Investigator(Kenkyū-buntansha) TAGO Teruoki  Kyushu University, Graduate School of Engineering, Research Associate, 大学院・工学研究院, 助手 (20304743)
WAKABAYASHI Katsuhiko  Kyushu University, Graduate School of Engineering, Professor, 大学院・工学研究院, 教授 (20220832)
Project Period (FY) 2000 – 2001
KeywordsAlumina-supported Pt Catalyst / Silica-coated Rh particle / Microemulsion / Sintering / NO-CO reaction
Research Abstract

1. We have developed a novel preparation method for supported metal catalysts using water-in-oil microemulsion, an ME method. In this method, Rh particles are partially embedded in SiO_2 supports because the SiO_2 supports are formed by hydrolysis of TEOS around the Rh precursor particle before being synthesized in the reverse micelle. In this work, sintering behaviors of Pt particles were investigated in Pt/Al2O3 catalysts prepared by different preparation method (ME, sol-gel and impregnation method (IMP). Pt/Al2O3 catalysts prepared by ME and sol-gel method possessed high resistance to sintering compared with the catalyst prepared by IMP method, because Pt particles were embedded in the support. Furthermore, resistance to the sintering of Pt particles was improved by pressing the catalysts at 156 MPa. For the endurance test under air flow at 700 ℃ for 12 h, the catalyst prepared using microemulsion and then pressed, the pressed ME catalyst, had greater resistance to sintering of Pt particles than the sol-gel and impregnation catalysts. The pressed ME catalyst exhibited higher activity in NO-CO reaction and maintain the high activity.
2. We successfully synthesized Rh nanoparticles wholly coated by a nanometer-scale SiO2 layer ring a specific microemulsion system. The thermal stability and the catalytic activity of CO-CO reaction of SiO2-coated Rh catalyst were compared with those of the catalysts prepared by ME, sol-gel and IMP methods. In the SiO2-coated Rh catalyst, all the Rh particles were covered by the SIO2 layer and remained small even after the thermal treatment at 900 ℃ for 12 h. It is concluded that migration of Rh particles of the SiO2-coated Rh catalyst was restrained by the SiO2 layer, resulting in the highest resistance to sintering. As a result, this catalyst had the highest activity in NO reduction by CO after thermal treatment at 900 ℃ for 12 h.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] M.Kishida, T.Tago, T.Hatsuta, K.Wakabayashi: "Preparation of Silica-Coated Rhodium Nanoparticles Using Water-in-Oil Microemulsion"Chemistry Letters. 1108-1109 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Ikeda, T.Tago, M.Kishida, K.Wakabayashi: "Thermal stability of Pt particles of Pt/Al_2O_3 catalysts prepared using microemulsion and catalytic activity in NO-CO reaction"Catalysis Communications. 2. 261-267 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Hanaoka, T.Tago, M.Kishida, K.Wakabayashi: "Size Control of Metastable ZnS Particles in w/o Microemulsion"Bulletin of the Chemical Society of Japan. 74. 1349-1354 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Hayashi, S.Murata, T.Tago, M.Kishida, K.Wakabayashi: "Low carbon deposition on C02 reforming of methane over Ni/Al2O3 catalysts I prepared using W/O microemulsion"Journal of the Japan Petroleum Institute. 44. 334-337 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Ikeda, T.Tago, M.Kishida, K.Wakabayashi: "Thermal stability of an SiO2-coated Rh catalyst and catalytic activity in NO reduction by CO"Chemical Communication. 2512-2513 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Tago, Y.Shibata, T.Hatsuta, M.Kishida, S.Tashiro, K.Wakabayashi: "Synthesis of Silica-Coated Rhodium Nanoparticles in Reversed Micellar Solution"Journal of Materials Science. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Kishida, T. Tago, T. Hatsuta and K. Wakabayashi: "Preparation of Silica-Coated Rhodium Nanoparticles Using Water-in-Oil Microemulsion"Chemistry Letters. 1108-1109 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Ikeda, T. Tago, M. Kishida and K. Wakabayashi: "Thermal stability of Pt particles of Pt/Al2O3 catalysts prepared using microemulsion and catalytic activity in NO-CO reaction"Catalysis Communications. 2. 261-267 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Hanaoka, T. Tago, M. Kishida, K. Wakabayashi: "Size Control of Metastable ZnS Particles in w/o Microemulsion"Bulletin of the Chemical Society of Japan. 74. 1349-1354 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Hayashi, S. Murata, T. Tago, M. Kishida and K. Wakabayashi: "Low carbon deposition on CO2 reforming of methane over Ni/Al2O3 catalysts prepared using W/O microemulsion"Journal of the Japan Petroleum Institute. 44. 334-337 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Ikeda, T. Tago, M. Kishida and K. Wakabayashi: "Thermal stability of an SiO2-coated Rh catalyst and catalytic activity in NO reduction by CO"Chemical Communication. 2512-2513 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Tago, Y. Shibata, T. Hatsuta, M. Kishida, S. Tashiro and K. Wakabayashi: "Synthesis of Silica-Coated Rhodium Nanoparticles in Reversed Micellar Solution"Journal of Materials Science. (in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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