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Catalyst design for direct decomposition of NO by precise control of active sites

Research Project

Project/Area Number 17350079
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental chemistry
Research InstitutionNational Institute of Advanced Industrial Science and Technolog

Principal Investigator

FUJITANI Tadahiro  National Institute of Advanced Industrial Science and Technolog, Research Institute for Innovation in Sustainable Chemistry, Group Leader, 環境化学技術研究部門, 研究グループ長 (50190054)

Co-Investigator(Kenkyū-buntansha) HANEDA Masaaki  National Institute of Advanced Industrial Science and Technolog, Research Institute for Innovation in Sustainable Chemistry, Senior Researcher, 環境化学技術研究部門, 主任研究員 (70344140)
KNAKAMURA Isao  National Institute of Advanced Industrial Science and Technolog, Research Institute for Innovation in Sustainable Chemistry, Researcher, 環境化学技術研究部門, 研究員 (00357659)
TAKAHASHI Atsushi  National Institute of Advanced Industrial Science and Technolog, Research Institute for Innovation in Sustainable Chemistry, Researcher, 環境化学技術研究部門, 研究員 (60357366)
MAEDA Yasushi  National Institute of Advanced Industrial Science and Technolog, Research Institute for Innovation in Sustainable Chemistry, Researcher, 環境化学技術研究部門, 研究員 (30357983)
Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥15,000,000 (Direct Cost: ¥15,000,000)
Fiscal Year 2006: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 2005: ¥10,000,000 (Direct Cost: ¥10,000,000)
KeywordsNitrogen oxides / Direct decomposition / Oxidation / Catalytic active sites / Catalyst design / Iridium / Tungsten / Sulfur / バリウム / 窒素酸化物の分解
Research Abstract

The decreased activity due to oxidation of the catalyst surface by oxygen contained in the feed is a serious problem in the direct decomposition of NO to N_2 and O_2 over solid catalysts. In this study, we investigated the NO decomposition properties using both model catalyst and real catalyst in order to clarify the structure of the effective surface for NO decomposition in the presence of O_2.
1.The NO decomposition proceeds on the Ir(111) surface, but no NO decomposition occurs on the Ir(111) surface exposed to O_2. In contrast, the Wdeposited Ir(111) surface exposed to O_2 showed the same NO decomposition activity as the Ir(111) surface, for which the formation of Ir-WOx species (x<3) was observed. We thus found that the surface composed from Ir and W is effective for NO decomposition in the presence of O_2. On the basis of the information obtained by model catalyst study, we examined the NO reactivity using the Ir-WO_3/SiO_2 powder catalyst. It was confirmed that the Ir-WO_3/SiO_2 catalyst has high NO dissociation ability and resistance to oxidation of Ir compared with the Ir/SiO_2 catalyst. Furthermore, we found that the addition of Ba to Ir-WO_3/SiO_2 significantly promoted NO decomposition activity, which was caused by the stabilization of metallic Ir due to the formation of complex oxides of Ba and W.
2.We found that the NO dissociation proceeds on the Ir surface in the presence of O_2 by coexisting SO_2, which was due to removal of adsorbed oxygen from the Ir surface by the reaction of oxygen with atomic sulfur produced from SO_2 dissociation. That is, the Ir surface was kept on metallic state in the presence of O_2 and SO_2. The effect of SO_2 on the preventing for the oxidation of the Ir surface was also observed for the Ir/SiO_2 powder catalyst.

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (21 results)

All 2007 2006 2005 Other

All Journal Article (20 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Adsorption and reactivity of SO_2 on Ir(111) and Rh(111)2007

    • Author(s)
      T.FUJITANI
    • Journal Title

      Surface Science 601

      Pages: 1615-1622

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Reaction properties of NO and CO over an Ir(211) surface2007

    • Author(s)
      I.NAKAMURA
    • Journal Title

      Journal of Vacuum Science and Technology A (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Adsorption and reactivity of SO2 on Ir(111) and Rh(111)2007

    • Author(s)
      T.FUJITANI et al.
    • Journal Title

      Surface Science 601

      Pages: 1615-1622

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Reaction properties of NO and CO over an Ir(211) surface2007

    • Author(s)
      I.NAKAMURA et al.
    • Journal Title

      Journal of Vacuum Science and Technology A (印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Direct decomposition of nitrogen monoxide over a K-deposited Co(0001) surface : comparison to K-doped cobalt oxide catalysts2006

    • Author(s)
      I.NAKAMURA
    • Journal Title

      Journal of Electron Spectroscopy and Related Phenomena 150

      Pages: 150-154

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Excellent Promoting Effect of Ba Addition on the Catalytic Activity of Ir/WO_3-SiO_2 for the Selective Reduction of NO with CO2006

    • Author(s)
      A.TAKAHASHI
    • Journal Title

      Chemistry Letters 32

      Pages: 420-421

    • NAID

      10018125728

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Adsorption behavior and reaction properties of NO and CO on Rh(111)2006

    • Author(s)
      I.NAKAMURA
    • Journal Title

      Surface Science 600

      Pages: 3235-3242

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Role of tungsten in promoting selective reduction of NO with CO over Ir/WO_3-SiO_2 catalysts2006

    • Author(s)
      A.TAKAHASHI
    • Journal Title

      Catalysis Letters 112

      Pages: 133-138

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Direct decomposition of nitrogen monoxide over a K-deposited Co(0001) surface : comparison to K-doped cobalt oxide catalysts2006

    • Author(s)
      I.NAKAMURA et al.
    • Journal Title

      Journal of Electron Spectroscopy and Related Phenomena 150

      Pages: 150-154

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Excellent Promoting Effect of Ba Addition on the Catalytic Activity of Ir/WO_3・SiO_2 for the Selective Reduction of NO with CO2006

    • Author(s)
      A.TAKAHASHI et al.
    • Journal Title

      Chemistry Letters 32

      Pages: 420-421

    • NAID

      10018125728

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Adsorption behavior and reaction properties of NO and CO on Rh(111)2006

    • Author(s)
      I.NAKAMURA et al.
    • Journal Title

      Surface Science 600

      Pages: 3235-3242

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Role of tungsten in promoting selective reduction of NO with CO over Ir/WO_3・SiO_2 catalysts2006

    • Author(s)
      A.TAKAHASHI et al.
    • Journal Title

      Catalysis Letters 11

      Pages: 133-138

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Role of tungsten in promoting selective reduction of NO with CO over Ir/WO3-SiO2 catalysts2006

    • Author(s)
      A.Takahashi et al.
    • Journal Title

      Catalysis Letters 112

      Pages: 133-138

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Excellent Promoting Effect of Ba Addition on the Catalytic Activity of Ir/WO3-SiO2 for the Selective Reduction of NO with CO2006

    • Author(s)
      A.TAKAHASHI
    • Journal Title

      Chemistry Letters (印刷中)

    • NAID

      130004424189

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Reactivity of NO over K-deposited Pd(111) and surface structure of the catalyst2005

    • Author(s)
      I.NAKAMURA
    • Journal Title

      Journal of Vacuum Science and Technology A 23

      Pages: 1051-1054

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Adsorption and reactions of NO on clean and CO-precovered Ir(111)2005

    • Author(s)
      T.FUJITANI
    • Journal Title

      Journal of Physical Chemistry B 109

      Pages: 17603-17607

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Reactivity of NO over K-deposited Pd(111) and surface structure of the catalyst2005

    • Author(s)
      I.NAKAMURA et al.
    • Journal Title

      Journal of Vacuum Science and Technology A 23

      Pages: 1051-1054

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Adsorption and reactions of NO on clean and CO-precovered Ir(111)2005

    • Author(s)
      T.FUJITANI et al.
    • Journal Title

      Journal of Physical Chemistry B 109

      Pages: 17603-17607

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Adsroption and reactions of NO on clean and CO-precovered Ir(111)2005

    • Author(s)
      T.FUJITANI
    • Journal Title

      Journal of Physical Chemistry B 109

      Pages: 17603-17607

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Reaction properties of NO and CO over an Ir(211) surface

    • Author(s)
      I.NAKAMURA et al.
    • Journal Title

      Journal of Vacuum Science and Technology A (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 窒素酸化物の選択的還元触媒2005

    • Inventor(s)
      高橋厚, 羽田政明, 藤谷忠博, 佐々木基, 浜田秀昭, 小渕存
    • Industrial Property Rights Holder
      高橋厚, 羽田政明, 藤谷忠博, 佐々木基, 浜田秀昭, 小渕存
    • Industrial Property Number
      2005-379356
    • Acquisition Date
      2005-12-28
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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