METHOD FOR PRODUCING CATALYST WHEREIN CATALYST PARTICLES HAVING CORE/SHELL STRUCTURE ARE SUPPORTED
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United States of America Patent
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Mar 2, 2016
filing date -
Mar 9, 2015
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Abstract
A method for forming catalyst particles, each of which has a core/shell structure, by a Cu-UPD method. Namely, a method of manufacturing a catalyst wherein catalyst particles, each of which has a core/shell structure composed of a shell layer that is formed of platinum and a core particle that is covered with the shell layer and is formed of a metal other than platinum, are supported on a carrier. This method is characterized by comprising: an electrolysis step wherein the carrier supporting the core particles is electrolyzed in an electrolytic solution containing copper ions, so that copper is precipitated on the surfaces of the core particles; and a substitution reaction step wherein a platinum compound solution is brought into contact with the core particles, on which copper has been precipitated, so that the copper on the surface of each core particle is substituted by platinum, thereby forming a shell layer that is formed of platinum. This method is further characterized in that the platinum compound solution in the substitution reaction step contains citric acid.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
TANAKA KIKINZOKU KOGYO K K | CHIYODA-KU TOKYO 100-6422 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
AKIYAMA, Tomohiro | Hiratsuka-shi, Kanagawa, JP | 45 | 144 |
# of filed Patents : 45 Total Citations : 144 | |||
KAIEDA, Takeshi | Hiratsuka-shi, Kanagawa, JP | 8 | 21 |
# of filed Patents : 8 Total Citations : 21 | |||
MATSUTANI, Koichi | Hiratsuka-shi, Kanagawa, JP | 21 | 76 |
# of filed Patents : 21 Total Citations : 76 |
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Patent Citation Ranking
- 1 Citation Count
- H01M Class
- 31.62 % this patent is cited more than
- 7 Age
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Mar 07, 2016 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Feb 10, 2016 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Feb 10, 2016 |
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