| US 7,572,542 B2 | ||
| Nanocarbon composite structure having ruthenium oxide trapped therein | ||
| Katsuhiko Naoi, Fuchu (Japan) | ||
| Assigned to Tokyo University of Agriculture and Technology, National University Corporation, Tokyo (Japan) | ||
| Appl. No. 11/628,853 PCT Filed Jun. 10, 2005, PCT No. PCT/JP2005/010717 § 371(c)(1), (2), (4) Date Dec. 07, 2006, PCT Pub. No. WO2005/121022, PCT Pub. Date Dec. 22, 2005. |
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| Claims priority of application No. 2004-173452 (JP), filed on Jun. 11, 2004. | ||
| Prior Publication US 2008/0048153 A1, Feb. 28, 2008 | ||
| Int. Cl. H01B 1/06 (2006.01) | ||
| U.S. Cl. 429—42 [252/500; 252/506; 252/510; 252/502; 429/215; 429/217; 977/755; 977/811] | 6 Claims |
| 1. A ruthenium oxide encapsulating nano-carbon composite structure, produced by a method comprising the steps of:
preparing a dispersed solution by highly dispersing in water a hollow nano-carbon having a hollow structure with a porosity
of no less than 30% by volume, by centrifugal processing;
preparing a precursor by adding a ruthenium chloride aqueous solution and adsorbing ruthenium chloride nano-particles onto
the inner and outer surface of the hollow nano-carbon; and
forming ruthenium oxide nano-particles from the ruthenium chloride nano-particles by ultra centrifugal processing of a solution
comprising the precursor, and a surface sol-gel reaction,
wherein the resulting ruthenium oxide nano-particles are highly dispersed as nanodots, inside and outside of hollow nano-carbon
graphene layers having a porosity of no less than 30% by volume and the nano-particle size of ruthenium oxide is in the range
of 0.5 to 2 nm.
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