公开(公告)号：US11784320B2

公开(公告)日：2023-10-10

申请号：US17232385

申请日：2021-04-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Haruhiko Shintani ,  Nobuhiro Miyata ,  Tomokatsu Wada

IPC: H01M4/92 ,  B01J21/18 ,  B01J23/42 ,  B01J23/75 ,  B01J35/02 ,  B01J35/10 ,  B01J37/02 ,  B01J37/08 ,  B01J37/16 ,  H01M8/1004 ,  H01M8/1067

CPC classification number: H01M4/926 ,  B01J21/185 ,  B01J23/42 ,  B01J23/75 ,  B01J35/023 ,  B01J35/1047 ,  B01J35/1061 ,  B01J37/0207 ,  B01J37/08 ,  B01J37/16 ,  H01M4/921 ,  H01M8/1004 ,  H01M8/1067

Abstract: A catalyst includes a mesoporous material and catalytic metal particles supported at least within the mesoporous material and containing platinum and a metal different from platinum. The mesoporous material has mesopores with a mode radius of 1 to 25 nm and a pore volume of 1.0 to 3.0 cm3/g before supporting of the catalytic metal particles, and has an average particle size of greater than or equal to 200 nm. A molar ratio of the metal different from platinum and contained in the catalytic metal particles relative to all metals contained in the catalytic metal particles is greater than or equal to 0.25, and among the catalytic metal particles, a volume ratio of catalytic metal particles having a particle size of greater than or equal to 20 nm is less than or equal to 10%.

公开(公告)号：US11367879B2

公开(公告)日：2022-06-21

申请号：US16597812

申请日：2019-10-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Haruhiko Shintani ,  Nobuhiro Miyata ,  Tomokatsu Wada

IPC: H01M4/02 ,  H01M4/90 ,  H01M4/86 ,  H01M8/1004 ,  H01M8/1018 ,  H01M8/10

Abstract: An electrode catalyst of an electrochemical device according to the present disclosure is an electrode catalyst of an electrochemical device, the electrode catalyst including a mesoporous material; and catalyst metal particles supported at least in the mesoporous material. Before supporting the catalyst metal particles, the mesoporous material includes mesopores having a mode radius of 1 to 25 nm and a pore volume of 1.0 to 3.0 cm3/g, and number density of the catalyst metal particles supported in the mesopores is lower at an outer side of the mesoporous material than number density of the catalyst metal particles supported in the mesopores at an inner side thereof.