US 20100129698Al  c19)  United States  c12)  Patent Application Publication  Okada et al.  c10)  Pub. No.: US 2010/0129698 Al  (43)  Pub. Date:  May 27, 2010  (54)  ELECTRODE CATALYST FOR FUEL CELL  (75)  Inventors:  Tatsuhiro Okada,  Tsukuba-shi  (JP);  Nobuyoshi Koshino,  Tsukuba-shi (JP);  Tadafumi  Matsunaga,  Tsukuba-shi (JP);  Hideyuki Higashimura,  Tsukuba-shi (JP);  Katsuhiro  Suenobu,  Tsukuba-shi (JP);  Masatoshi Iwata,  Tsukuba-shi (JP)  (73)  Assignees:  National Institute of Advanced  Science and Technology,  Chiyoda-ku, Tokyo (JP);  Sumitomo  Chemical Company, Limited,  Chuo-ku, Tokyo (JP)  (21)  Appl. No.:  12/530,187  (22)  PCT Filed:  Mar. 10, 2008  (51)  Int. Cl.  HOJM 4186  (2006.01)  Correspondence Address:  SUGHRUE MION, PLLC  2100 PENNSYLVANIA AVENUE, N.W., SUITE  800  WASHINGTON, DC 20037 (US)  (30)  Foreign Application Priority Data  (57)  ABSTRACT  Publication Classification  (86)  PCT No.:  § 371 (c)(l),  (2), (  4) Date:  PCT/JP2008/054330  Sep.4,2009  (52)  U.S. Cl.  ..........................................................  429/40  An electrode catalyst for fuel cell, containing a multinuclear  complex, in which the multinuclear complex contains 2 to 4  transition metal atoms coordinated with a ligand having 5 to  15 coordination atoms in its molecule; and an electrode cata› lyst for fuel cell, comprising a mononuclear metal complex  containing, as a ligand, an organic compound containing two  or more phenol rings and three or more aromatic hetero› cycles.  Mar. 9, 2007  Mar. 9, 2007  (JP) ................................. 2007-061014  (JP) ................................. 2007-061026 