METAL-LOADED CATALYST AND MANUFACTURING METHOD THEREOF, AND ELECTRODE AND BATTERY

• Main Authors: ICHIKAWA AKIRA FAXON, KOBAYASHI YOSHIKAZU, KATAGIRI NORIAKI, ISHIZUKA TAKUYA, SATO TETSUTARO, KISHIMOTO TAKEAKI
• Format: Patent
• Language: English; Japanese
• Published: 14.09.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; ELECTRICITY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR RELEVANT APPARATUS; TRANSPORTING

To provide a metal-loaded catalyst that, while having a large noble metal content, exhibits both an excellent durability and an excellent catalytic function and a manufacturing method thereof, as well as an electrode and a battery.SOLUTION: A metal-loaded catalyst comprises a carbon support and noble metal alloy-containing catalyst metal particles supported by the carbon support. The ratio of the weight of the noble metal to the weight of the metal-loaded catalyst is 35 wt.% or more. The metal-loaded catalyst has the following property (a) and/or property (b): (a) the alloy composition heterogeneity is at most 0.55; and (b) the half-maximum asymmetry and the 1/4-maximum asymmetry are both at most 0.55.SELECTED DRAWING: None 【課題】大きな貴金属含有量を有しながら、優れた耐久性と優れた触媒機能とを兼ね備えた金属担持触媒及びその製造方法並びに電極及び電池を提供する。【解決手段】金属担持触媒は、炭素担体と、前記炭素担体に担持された、貴金属合金を含む触媒金属粒子と、を含む金属担持触媒であって、前記金属担持触媒の重量に対する前記貴金属の重量の割合が３５重量％以上であり、下記特性（ａ）及び／又は（ｂ）：（ａ）合金組成不均一性が０．５５以下；（ｂ）半値非対称性及び１／４値非対称性がいずれも０．５５以下；を有する。【選択図】なし