Design of Nano-Sized Pt Metals Synthesized on Ti-Containing Mesoporous Silicas and Efficient Catalytic Application for NO Reduction

• Mori Kohsuke

  Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

• Shironita Sayoko

  Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

• Shimizu Toshiaki

  Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

• Sakata Takao

  Research Center for Ultra-High Voltage Electron Microscopy Osaka University

• Mori Hirotaro

  Research Center for Ultra-High Voltage Electron Microscopy Osaka University

• Ohmichi Tetsutaro

  Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

• Yamashita Hiromi

  Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

Abstract

A novel method to prepare the nano-sized Pt metal catalysts is proposed. Mesoporous silicas containing highly dispersed titanium oxide species (Ti-HMS) can act as the platform to generate highly dispersed Pt metal particles. Characterization by Pt L_III-egde XAFS, CO adsorption, and TEM analyses revealed that the size of formed Pt metal particles depends on the presence of titanium oxide species and that the smaller sizes of Pt metal particles was obtained with increasing the Ti contents in the silica matrix. These nano-sized Pt metal catalysts are useful as efficient catalysts for NO reduction, and higher conversion could be attained with smaller size of Pt metal particles. The present technique using Ti-containing mesoporous silicas as catalyst supports make a great contribution to minimize the amount of precious metals in order to meet today’s industrial requirements.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 49 (3), 398-401, 2008

  The Japan Institute of Metals and Materials

Keywords

• nano-sized metal catalyst
• platinum
• mesoporous silica
• tetrahedral titanium oxide

Details

• CRID: 1390001204249842176
• NII Article ID: 10021144475
• NII Article ID: 130004453907
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.ml200702
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 9412823
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9412823
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/49/3/49_ML200702/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed