Title:
METAL-LOADED CATALYST, ELECTRODE, AND BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/166753
Kind Code:
A1
Abstract:
Provided is a metal-loaded catalyst that, while having a large noble metal content, exhibits both an excellent durability and an excellent catalytic function. Also provided are an electrode and a battery. The metal-loaded catalyst comprises a carbon support and noble metal alloy-containing catalyst metal particles supported by the carbon support. The percentage for the weight of the noble metal with reference to the weight of the metal-loaded catalyst is at least 35 weight%, and the BET specific surface area is at least 350 (m2/g-carbon support). The metal-loaded catalyst has the following property (a1) and/or property (a2): (a1) in the Raman spectrum provided by Raman spectroscopy, the ratio of the intensity of the 2D band having a peak top in the vicinity of a Raman shift of 2680 cm-1 to the intensity of the G band having a peak top in the vicinity of a Raman shift of 1600 cm-1, is at least 0.20 and not more than 1.00; (a2) in the Raman spectrum provided by Raman spectroscopy, the half width at half maximum of the D band having a peak top in the vicinity of a Raman shift of 1340 cm-1 is not more than 41.0 cm-1. The metal-loaded catalyst also has the following property (b1) and/or property (b2): (b1) the alloy composition heterogeneity is not more than 0.55; (b2) the half-maximum asymmetry and the 1/4-maximum asymmetry are both not more than 0.55.
Inventors:
ISHIZUKA TAKUYA (JP)
SATO TETSUTARO (JP)
KISHIMOTO TAKEAKI (JP)
KOBAYASHI YOSHIKAZU (JP)
KATAGIRI NORIAKI (JP)
ICHIKAWA AKIRA FAXON (JP)
SATO TETSUTARO (JP)
KISHIMOTO TAKEAKI (JP)
KOBAYASHI YOSHIKAZU (JP)
KATAGIRI NORIAKI (JP)
ICHIKAWA AKIRA FAXON (JP)
Application Number:
PCT/JP2022/023284
Publication Date:
September 07, 2023
Filing Date:
June 09, 2022
Export Citation:
Assignee:
NISSHINBO HOLDINGS INC (JP)
International Classes:
B01J27/24; B01J23/89; C01B32/05; C01B32/205; C25B11/054; C25B11/065; C25B11/081; H01M4/86; H01M4/90; H01M8/10; H01M12/06
Domestic Patent References:
| WO2021024658A1 | 2021-02-11 | |||
| WO2021024656A1 | 2021-02-11 | |||
| WO2021024657A1 | 2021-02-11 | |||
| WO2013129417A1 | 2013-09-06 |
Foreign References:
| JP2020500096A | 2020-01-09 |
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (JP)
Download PDF: