US 12,132,212 B2
Metal supported catalyst, battery electrode, and battery
Yuji Kubota, Chiba (JP); Ayaka Fujimoto, Chiba (JP); Takeaki Kishimoto, Funabashi (JP); Takuya Ishizuka, Chiba (JP); Takuya Isaka, Chiba (JP); and Miki Meguro, Funabashi (JP)
Assigned to NISSHINBO HOLDINGS INC., Tokyo (JP)
Appl. No. 17/631,243
Filed by NISSHINBO HOLDINGS INC., Tokyo (JP)
PCT Filed Jul. 2, 2020, PCT No. PCT/JP2020/026045
§ 371(c)(1), (2) Date Jan. 28, 2022,
PCT Pub. No. WO2021/024658, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 2019-143406 (JP), filed on Aug. 2, 2019.
Prior Publication US 2022/0285696 A1, Sep. 8, 2022
Int. Cl. H01M 4/92 (2006.01); H01M 8/10 (2016.01); H01M 8/1032 (2016.01); H01M 8/1039 (2016.01)
CPC H01M 4/926 (2013.01) [H01M 8/1032 (2013.01); H01M 8/1039 (2013.01); H01M 2008/1095 (2013.01); H01M 2300/0082 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A metal-supported catalyst, comprising:
a carbon carrier; and
platinum particles supported on the carbon carrier, wherein, in a photoelectron spectrum obtained by X-ray photoelectron spectroscopy, the metal-supported catalyst exhibits a peak derived from a 1s orbital of a nitrogen atom, which is separated into the following peaks (1) to (6) of nitrogen atoms:
(1) a peak of first nitrogen atoms having a peak top in a range of a binding energy of 398.6±0.2 eV;
(2) a peak of second nitrogen atoms having a peak top in a range of a binding energy of 399.5±0.3 eV;
(3) a peak of third nitrogen atoms having a peak top in a range of a binding energy of 400.5±0.2 eV;
(4) a peak of fourth nitrogen atoms having a peak top in a range of a binding energy of 401.3±0.3 eV;
(5) a peak of fifth nitrogen atoms having a peak top in a range of a binding energy of 403.4±0.4 eV; and
(6) a peak of sixth nitrogen atoms having a peak top in a range of a binding energy of 404.5±0.5 eV,
wherein a ratio of a peak area of the second nitrogen atoms to a total peak area of the nitrogen atoms of the (1) to (6) measured by the X-ray photoelectron spectroscopy is 0.03 or more,
wherein a ratio of a concentration of the second nitrogen atoms to a concentration of carbon atoms measured by the X-ray photoelectron spectroscopy is 0.0005 or more,
wherein an electrochemical surface area (H2-ECSA) obtained by dividing a hydrogen adsorption electric quantity, measured in cyclic voltammetry using a rotating disc electrode containing the metal-supported catalyst, by a theoretical area-equivalent electric quantity of hydrogen adsorption to platinum and a weight of platinum supported on the metal-supported catalyst, is 20.0 m2/g-platinum or more, and
wherein an electrochemical surface area (CO-ECSA), obtained by dividing a carbon monoxide adsorption electric quantity measured in stripping voltammetry using the rotating disc electrode containing the metal-supported catalyst by a theoretical area-equivalent electric quantity of carbon monoxide adsorption to platinum and the weight of platinum supported on the metal-supported catalyst, is 20.0 m2/g-platinum or more.