# US 2019/0355995 A1 · Catalyst and electrode catalyst layer, membrane electrode assembly, and fuel cell using the catalyst

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- Number: US 2019/0355995 A1
- Document ID: US20190355995A1
- Status: Published application
- Kind: A1
- Application number: 16/529,031
- Filed: 2019-08-01
- Published: 2019-11-21
- Earliest claimed: 2013-04-25
- Assignees: Nissan Motor Co., Ltd.
- Applicants: Nissan Motor Co., Ltd.
- Inventors: Tetsuya MASHIO; Yoshihisa FURUYA; Ken AKIZUKI; Atsushi OHMA
- Web page: https://patentgrep.com/patent/US20190355995A1

## CPC

- H01M 4/8605: {Porous electrodes}
- H01M 4/921: {Alloys or mixtures with metallic elements}
- H01M 4/925: {supported on carriers, e.g. powder carriers}
- H01M 4/926: {on carbon or graphite}
- H01M 8/1004: characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence)
- H01M 4/923: {Compounds thereof with non-metallic elements}
- H01M 8/0234: Carbonaceous material
- H01M 2008/1095: {Fuel cells with polymeric electrolytes}
- H01M 2250/20: Fuel cells in motive systems, e.g. vehicle, ship, plane
- Y02E 60/50: Fuel cells
- Y02T 90/40: Application of hydrogen technology to transportation, e.g. using fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Provided is a catalyst having excellent gas transportability. Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support or more or a mode radius of a pore distribution of the pores having a radius of less than 1 nm is 0.3 nm or more and less than 1 nm, and wherein the catalyst metal is supported inside the pores having a radius of 1 nm or more.

## Claims

### Claim 1

A catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support,
wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more,
wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support to 2 cc/g support, and
wherein the catalyst metal is supported inside the pores having a radius of 1 nm or more.

### Claim 2 (depends on 1)

The catalyst according to claim 1, wherein a pore volume of the pores having a radius of less than 1 nm is 0.83 cc/g support to 2 cc/g support.

### Claim 3 (depends on 1)

The catalyst according to claim 1, wherein a mode radius of a pore distribution of the pores having a radius of less than 1 nm is 0.3 nm or more and less than 1 nm.

### Claim 4 (depends on 1)

The catalyst according to claim 1, wherein an average particle diameter of the catalyst metal is 3 nm or more.

### Claim 5 (depends on 1)

The catalyst according to claim 1, wherein a pore volume of the pores having a radius of 1 nm or more is 0.4 cc/g support or more.

### Claim 6 (depends on 1)

The catalyst according to claim 1, wherein a mode radius of a pore distribution of the pores having a radius of 1 nm or more of the catalyst is in the range of 1 to 5 nm.

### Claim 7 (depends on 1)

The catalyst according to claim 1, wherein a BET specific surface area of the catalyst is 1000 m2/g support or more.

### Claim 8 (depends on 7)

The catalyst according to claim 7, wherein a BET specific surface area of the catalyst is 1440 m2/g support or more.

### Claim 9 (depends on 1)

The catalyst according to claim 1, wherein the catalyst metal is platinum or includes platinum and a metal component other than platinum.

### Claim 10 (depends on 1)

An electrode catalyst layer for fuel cell comprising the catalyst set forth in claim 1, and an electrolyte.

### Claim 11 (depends on 10)

A membrane electrode assembly for fuel cell comprising the electrode catalyst layer for fuel cell set forth in claim 10.

### Claim 12 (depends on 11)

A fuel cell comprising the membrane electrode assembly for fuel cell set forth in claim 11.