| Project/Area Number |
04453077
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
工業物理化学・複合材料
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SAITO Yasukazu The Univ.Tokyo, Faculty of Engineering, Professor, 工学部, 教授 (10010761)
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| Co-Investigator(Kenkyū-buntansha) |
YAMASHITA Masaru The Univ.Tokyo, Research Associate, 工学部, 助手 (30239983)
ITAGAKI Hiroaki The Univ.Tokyo, Research Associate, 工学部, 助手 (00203076)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1993: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1992: ¥6,700,000 (Direct Cost: ¥6,700,000)
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| Keywords | Alkane Dehydrogenation Catalyst / Ruthenium Cluster Complex / Platinum Cluster Complex / Catalyst Surface Modification with Cluster Complex / Carbonyl Ligand Dissociation / Diphosphine-bridged Complex / Rhodium Dinuclear Complex / Iridium Dinuclear Complex / ルテニウム3核クラスター / 白金15核クラスター / シロクオクタン / エチルシクロヘキサン / 還流加熱条件 / シクロオクテン / エチルベンゼン |
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| Research Abstract |
A ruthenium carbonyl cluster complex Ru_3(CO)_<12> exhibited homogeneous catalysis for cyclooctane dehydrogenation, yielding cyclooctene and dihydrogen at T.O.N.= 69, whereas cyclohexanes were unreactive even under boiling and refluxing conditions in contrast to catalytically-active platinum or platinum-ruthenium composite fine particles.
Pt-Ru composite catalysts were prepared from an ionic pair of Cs_2[Pt_3(CO)_6]_5 and [Ru(C_6Me_6)_2](BF_4)_2 by precepitation on a carbon support, followed by a heat treatment or from the surface modification of a platinum catalyst with a ruthenium hydrido-carbonyl complex H_4Ru_4(CO)_<12>. These composite catalysts were highly-active for dehydrogeno-aromatization of ethylcyclohexane.
Photocatalytic alkane dehydrogenation was demonstrated with the A-frame dinuclear complexed of rhodium and iridium. It is noteworthy that the photoactive band at 365 nm of RhCl(CO)(PR_3)_2 is now extended to 475 nm (dinuclear Rh) and to 520 nm (dinuclear Ir), since it is important from the viewpoint of solar energy utilization.
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