2007 Fiscal Year Final Research Report Summary
Uniform Monoatomic-layer Covering of Mixed Metal Oxides by Precious Metals Based on Coordination Chemistry
| Project/Area Number |
17550053
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic chemistry
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| Research Institution | Yamagata University |
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Principal Investigator |
SAKAMOTO Masatomi Yamagata University, Faculty of Science, Professor (20036445)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Coordination Polymer / Crystal Surface / Precious Metal / Coordination Bond / Covering of Cryatal Surface / Perovskite-type Oxide |
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| Research Abstract |
Precious metal-supported mixed metal oxides have received much attention to develop various functional materials including oxidating catalysts. The purpose of the present work is to propose a new technique for the uniform covering of perovskite-type oxides by precious metals. This method is based on the chemical interaction of precious metal ions or these metal complexes with the surface cyano-nitrogens or the surface metal site.
In order to accomplish the present purpose, covering of cyano-bridged heteronuclear coordination polymer, La[Fe (CN)_6]-nH_2O and La[Co (CN)_6]-nH_2O, which have been known to be good precursors of perovskite-type oxides, by Pd (II) and Rh (III) ions was examined.
First, the coordination polymer crystals were immersed in water and an aqueous solution of Pd (NO_3) 2 or Rh (NO_3)_3 was added. After stirring for a while, the crystals were filtered and washed several times with a small amount of water. Results showed that the Pd (II) ions were coordinated by the surface cyano-nitrogens. However, Rh (III) ions did not bind to the cyano-nitrogens. This is probably because the Rh (III) with d^6 electronic configuration is typically inert in the ligand substitution, that is, the substitution of water molecule coordinating to Rh (III) in its aqueous solution by the cyano-nitrogen is extremely slow. So, an aqueous solution of [Rh (C_2O_4)_3]^<3-> was used instead of the aqueous solution of Rh (NO_3)_3-As expected,[Rh (C_2O_4)_3]^<3-> was coordinated to the surface La (III) through the oxalato-bridges.
The present method will be promising for the preparation of precious metal-supported perovskite-type oxides.
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Research Products
(79 results)
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[Journal Article] Effect of Preparation Techniques of LaFeO_3 Perovskite-Type Oxide on Its Surface Morphologies2007
Author(s)
M., Furukawa・T., Iseya・S., Itoh・A., Anzai・K., Sato・M., Kurihara・M., Sakamoto・H., Aono・Y., Sadaoka・S., Hamakawa・Y., Hoshi・F., Mizukami
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Journal Title
Journal of the Ceramic Society of Japan 115
Pages: 640-642
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Effect of Preparation Techniques of LaFeO_3 Perovskite-Type Oxide on Its Surface Morphologies2007
Author(s)
M. Furukawa, T. Iseya, S. Itoh, A. Anzai, K. Sato, M. Kurihara, M Sakamoto, H. Aono, Y. Sadaoka, S. Hamakawa, Y. Hoshi, F. Mizukami
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Journal Title
Journal of the Ceramic Society of Japan 115
Pages: 640-642
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Preparation of RYB Nanoparticle Inks from Prussian Blue and Its Analogs, and Their Electrochemical Properties2007
Author(s)
A. Gotoh, H. Uchida, M. Ishizaki, T. Sato, Y. Sajima, M. Kurihara, M. Sakamoto. T. Kawamoto, H. Tanaka, S. Hara, K. Shiozaki, M Tokumoto
Organizer
The 57th Symposium on Coordination Chemistry
Place of Presentation
Nagoya
Year and Date
20070925-27
Description
「研究成果報告書概要(欧文)」より
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[Presentation] RYB Nanoparticle Inks Prepared from Prussian Blue and Its Analogs2007
Author(s)
M. Kurihara, A. Gotoh, H. Uchida, M. Ishizaki, T. Sato, M. Sakamoto. T. Kawamoto, H. Tanaka, S. Hara, K Shiozaki, M. Tokumoto, M. Yamada
Organizer
5th Annual Meeting of Society of Nano Science and Technology
Place of Presentation
Tsukuba
Year and Date
20070521-23
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Preparation of Thin Film of Nanocrystals of Prussian Blue and Its Analogs, and Their Electrochemical Properties2006
Author(s)
H. Uchida, K Muto, M. Ishizaki, T. Sato, M. Kurihara, M. Sakamoto. S. Hara, H. Tanaka, T. Kawamoto, M. Tokumoto, M. Yamada, M. Miyake
Organizer
The 56th Symposium on Coordination Chemistry
Place of Presentation
Hiroshima
Year and Date
20060916-18
Description
「研究成果報告書概要(欧文)」より
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