US 11,901,568 B2
Electrocatalyst
Ryo Shimizu, Susono (JP); Kumiko Nomura, Okazaki (JP); Tomohiro Takeshita, Nagakute (JP); Shu Miyasaka, Hamamatsu (JP); and Kenji Yamamoto, Hamamatsu (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and CATALER CORPORATION, Kakegawa (JP)
Filed by Ryo Shimizu, Toyota (JP); Kumiko Nomura, Toyota (JP); Tomohiro Takeshita, Nagakute (JP); Shu Miyasaka, Kakegawa (JP); and Kenji Yamamoto, Kakegawa (JP)
Filed on Mar. 3, 2022, as Appl. No. 17/653,400.
Claims priority of application No. 2021-034278 (JP), filed on Mar. 4, 2021.
Prior Publication US 2022/0285697 A1, Sep. 8, 2022
Int. Cl. H01M 4/00 (2006.01); H01M 4/92 (2006.01); H01M 4/88 (2006.01); C22C 5/04 (2006.01)
CPC H01M 4/926 (2013.01) [H01M 4/8842 (2013.01); C22C 5/04 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An electrocatalyst for fuel cells,
wherein the electrocatalyst comprises a carbon support including a mesopore and a catalyst alloy supported on the carbon support, and the catalyst alloy is a catalyst alloy of platinum and a transition metal;
wherein the mesopore includes at least one throat;
wherein an average effective diameter of the at least one throat is 1.8 nm or more and less than 3.2 nm; and
wherein a transition metal ratio of the catalyst alloy supported on a deeper-side region than the at least one throat, is lower than the transition metal ratio of the catalyst alloy supported on a nearer-side region than the at least one throat.