| Project/Area Number |
09555245
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
触媒・化学プロセス
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| Research Institution | Tokyo University of Agriculture & Technology |
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Principal Investigator |
KOMIYA Sanshiro Tokyo University of Agriculture and Technology, Department of Applied Chemistry, Professor, 工学部, 教授 (00111667)
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| Co-Investigator(Kenkyū-buntansha) |
KOMINE Nobuyuki Tokyo University of Agriculture and Technology, Department of Applied Chemistry, Research Associate, 工学部, 助手 (90302918)
HIRANO Masafumi Tokyo University of Agriculture and Technology, Department of Applied Chemistry, Associate Professor, 工学部, 講師 (70251585)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1998: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1997: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | ultrafine particles / platinum / palladium / siloxo ligand / hydrogenolysis / catalyst / 有機金属錯体 / 担持触媒 / 白金シロキソ錯体 |
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| Research Abstract |
Group 10 metal complexes with a siloxo ligand, M(Me)(OSiPhィイD23ィエD2)(cod) [1:M = Pt, 2 : M = Pd, cod = 1,5-cyclooctadiene] are newly prepared by the metathetical reaction of M(Me)(Cl)(cod) with NaOSiPhィイD23ィエD2. These complexes are found to form nano-scale ultrafine Pt or Pd particles with concomitant formation of cyclooctane, methane and triphenylsilanol by exposure to molecular hydrogen (1 atm) under ambient conditions. Adsorption of complex 1 on the surface of silica followed by exposure to HィイD22ィエD2 results in the formation of ultrafine Pt particles on silica (mean diameter = 8.2 ± 6.2 nm). These silica-supported Pt particles act as catalyst for hydrogenation of olefins and for reduction of nitrogen oxides. On the other hand, hydrogenolysis of polymer films containing 1 also gives polymer containing highly dispersed Pt particles with mean diameters of 1-8 nm. The Pt metal particles size decreases with decrease of reduction temperature and concentration of 1 in the polymer. The polar polymer such as poly(methyl methacrylate) gives the smallest particles less than 1 nm diameters. These particles are characterized as pure Pt crystals by TEM, FE-TEM, and XPS analyses.
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