Noble metal-oxide combined nanoparticle, and, method of producing the same with high purity

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United States of America Patent

PATENT NO 9675964
APP PUB NO 20140038815A1
SERIAL NO

13983436

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Abstract

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A method of producing a composite nanoparticle (M-AxOy), having: generating, in an inert gas, an alloy (A-M) nanoparticle, which contains 0.1 at. % to 30 at. % of a noble metal (M), with the balance being a base metal (A) and inevitable impurities, and which has a particle size of 1 nm to 100 nm, to heat the alloy (A-M) nanoparticle and to bring the alloy (A-M) nanoparticle into contact with a supplied oxidizing gas during transportation of the alloy (A-M) nanoparticle with the inert gas, to oxidize the base metal component (A) in the floating alloy (A-M) nanoparticle, and to phase separate into the thus-oxidized base metal component (AxOy) and the noble metal component (M), to thereby obtain a composite nanoparticle (M-AxOy) having one noble metal particle (M) combined to the surface of a particulate base metal oxide (AxOy).

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Patent OwnerAddress
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYCHIYODA-KU TOKYO 100-8921

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirasawa, Makoto Tsukuba, JP 15 31
Koga, Kenji Tsukuba, JP 21 93
Koshizaki, Naoto Tsukuba, JP 4 14
Sakurai, Hiroaki Osaka, JP 24 88

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