US 12,355,087 B2
Electrochemical oxygen reduction catalyst
Masafumi Asahi, Ikeda (JP); and Shin-Ichi Yamazaki, Ikeda (JP)
Assigned to NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, Tokyo (JP)
Appl. No. 17/774,699
Filed by NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, Tokyo (JP)
PCT Filed Oct. 28, 2020, PCT No. PCT/JP2020/040483
§ 371(c)(1), (2) Date May 5, 2022,
PCT Pub. No. WO2021/090746, PCT Pub. Date May 14, 2021.
Claims priority of application No. 2019-203430 (JP), filed on Nov. 8, 2019.
Prior Publication US 2022/0416258 A1, Dec. 29, 2022
Int. Cl. H01M 4/90 (2006.01); H01M 4/86 (2006.01); H01M 12/06 (2006.01)
CPC H01M 4/9058 (2013.01) [H01M 4/9008 (2013.01); H01M 4/9083 (2013.01); H01M 12/06 (2013.01); H01M 2004/8689 (2013.01)] 15 Claims
 
1. An electrochemical oxygen reduction catalyst comprising platinum-containing nanoparticles and at least one member selected from the group consisting of a polymer containing a melamine compound as a monomer and a thiol melamine compound;
the polymer containing a melamine compound as a monomer being a polymer having a repeating unit represented by formula (1):

OG Complex Work Unit Chemistry
wherein
R8, R9, R10, and R11 are the same or different, and represent hydrogen, hydroxy, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted aryl, and
R12 represents substituted or unsubstituted alkylene, substituted or unsubstituted alkenylene, substituted or unsubstituted cycloalkylene, or substituted or unsubstituted arylene, with the proviso that when none of R8, R9, R10, and R11 is substituted with sulfonic acid or a derivative group of formula —SO3M, wherein M is an alkali metal or NH4, R12 represents substituted or unsubstituted arylene; and
the thiol melamine compound being a thiol melamine compound represented by formula (2):

OG Complex Work Unit Chemistry
wherein
R1, R2, R3, R4, R5, and R6 are the same or different, and represent hydrogen, hydroxy, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted aryl, and
R7 represents substituted or unsubstituted alkylene, substituted or unsubstituted alkenylene, substituted or unsubstituted cycloalkylene, or substituted or unsubstituted arylene.