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Porous catalyst, catalyst layer for fuel cell, electrode, membrane electrode assembly, fuel cell, and method for preparing porous catalyst

A fuel cell and catalyst layer technology, applied in catalyst activation/preparation, fuel cells, battery electrodes, etc., can solve the problem of insufficient catalyst activity and other characteristics, and achieve high characteristics, high utilization efficiency, and excellent economic effects.

Active Publication Date: 2019-12-13
SUZUTOYO SEIKO CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, materials composed of a single core-shell ceramic particle have insufficient properties such as catalytic activity, and it is necessary to combine two or more materials to produce core-shell ceramic particles

Method used

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  • Porous catalyst, catalyst layer for fuel cell, electrode, membrane electrode assembly, fuel cell, and method for preparing porous catalyst
  • Porous catalyst, catalyst layer for fuel cell, electrode, membrane electrode assembly, fuel cell, and method for preparing porous catalyst
  • Porous catalyst, catalyst layer for fuel cell, electrode, membrane electrode assembly, fuel cell, and method for preparing porous catalyst

Examples

Experimental program
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preparation example Construction

[0098]

[0099] The preparation method of the above-mentioned catalyst is not particularly limited, for example, the preparation method comprising the following steps can be enumerated: first, the sulfur-containing carbonitride is prepared through the procedure A, and then the prepared sulfur-containing carbonitride is subjected to an inert gas containing oxygen through the procedure B. Heating in the middle, thus obtaining sulfur-containing carbon and nitrogen oxides.

[0100] The sulfur-containing carbonitride obtained by such a production method preferably has a porosity of 75% to 90%, and a catalyst containing the sulfur-containing carbonitride tends to have high redox activity.

[0101] (Process A: Preparation method of sulfur-containing carbonitride)

[0102] In the present invention, as step A, at least (1) sulfur and / or sulfur compounds selected from its oxides, carbides and nitrides, (2) boron and / or sulfur compounds selected from its oxides, carbides and boron com...

Embodiment 1

[0200] The BET specific surface area of ​​Example 1: 59.32m 2 / g

[0201] Particle size of Example 1: 10.28 μm

[0202] Porosity of Example 1: 87%

Embodiment 2

[0203] The BET specific surface area of ​​embodiment 2: 57.01m 2 / g

[0204] Particle size of Example 2: 7.29 μm

[0205] Porosity of Example 2: 84%

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Abstract

To provide a catalyst which is stable and does not corrode at high potentials or in acidic electrolytes of fuel cells, effectively participates in electrode reactions, not only in catalyst particles present on the surface contacting an electrolyte membrane but also at a three-phase interface, of a gas phase (humidified reaction gas) and a liquid phase, formed in catalyst particles in a catalyst layer present in a location far away from the electrolyte membrane, has a high utilization efficiency of catalyst particles, has a high oxygen reduction ability, can achieve high performance, and is inexpensive compared to platinum. A fuel cell thus obtained exhibits high performance, has a long lifetime, and is relatively low-cost and thus has excellent economic efficiency. The present invention provides a porous catalyst comprising molybdenum, boron, and a sulfur-containing oxycarbonitride containing the following metal K (at least one metal selected from the group consisting of tantalum, zirconium, copper, iron, tungsten, titanium, vanadium, cobalt, manganese, aluminum, and nickel).

Description

technical field [0001] The invention relates to a porous catalyst, a fuel cell catalyst layer, an electrode, a membrane electrode assembly, a fuel cell and a preparation method of the porous catalyst. Background technique [0002] Hereinafter, an example of a fuel cell will be described. [0003] They are classified into various types according to the type of electrolyte or electrode, and typical types include alkaline, phosphoric acid type, molten carbonate type, solid electrolyte type, and solid polymer type. Among them, solid polymer fuel cells that can operate at low temperatures (about -40°C) to about 120°C have attracted attention. In recent years, the development and practical use of low-pollution power sources for automobiles has been progressing. As applications of solid polymer fuel cells, driving sources for vehicles and stationary power sources have been studied, and long-term durability is required in order to be suitable for these applications. [0004] Figu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/10B01J37/08H01M4/86H01M4/90H01M8/10
CPCB01J27/051B01J37/08Y02E60/50H01M4/9016H01M4/8807H01M2004/8689H01M8/1004H01M2008/1095B01J35/60
Inventor 吉井久美子上野秀男
Owner SUZUTOYO SEIKO CO LTD