| US 7,579,298 B2 | ||
| Catalyst, electrode for fuel electrode in fuel cell, and fuel cell | ||
| Wu Mei, Yokohama (Japan); Taishi Fukazawa, Fuchu (Japan); Takahiro Sato, Kawasaki (Japan); and Yoshihiko Nakano, Yokohama (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Sep. 25, 2006, as Appl. No. 11/534,804. | ||
| Claims priority of application No. P2005-302813 (JP), filed on Oct. 18, 2005. | ||
| Prior Publication US 2007/0087258 A1, Apr. 19, 2007 | ||
| Int. Cl. B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/00 (2006.01); H01M 4/92 (2006.01) | ||
| U.S. Cl. 502—339 [502/325; 429/40] | 9 Claims |
| 1. A catalyst comprising:
oxygen and at least one noble metal-containing particle wherein said at least one noble metal-containing particle has a composition
represented by a formula PtXRuYAZSnS and has a mean particle diameter of from 0.5 nm to 10 nm, wherein
A is at least one element selected from the group consisting of Rh, Au, Pd, Ir and Os, and
X, Y, Z and S are atomic ratios satisfying relations 30≤X≤70, 30≤Y≤70, 0≤Z≤40, 0.5≤S≤8 and X+Y+Z+S=100.
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