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Fuel cell, membrane electrode assembly, catalyst used therefor, and method of producing catalyst

A fuel cell and catalyst technology, applied in the direction of battery electrodes, catalyst carriers, chemical instruments and methods, etc., can solve problems such as negative effects, reduced specific surface area, and reduced catalytic activity

Inactive Publication Date: 2009-04-15
HITACHT MAXELL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above situation, if a porous carbon carrier with a high specific surface area is used, although a Pt or PtRu catalyst with a particle size of less than 5 nm can be synthesized, there are negative effects in terms of improving the utilization efficiency of the catalyst.
As a result, the specific surface area of ​​the Pt or PtRu catalyst decreases and the catalytic activity decreases

Method used

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  • Fuel cell, membrane electrode assembly, catalyst used therefor, and method of producing catalyst
  • Fuel cell, membrane electrode assembly, catalyst used therefor, and method of producing catalyst
  • Fuel cell, membrane electrode assembly, catalyst used therefor, and method of producing catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Dissolve 1.69mmol bis(acetylacetonate) platinum (II) and 0.845mmol sodium hypophosphite respectively in 100ml ethylene glycol, and add to be dispersed with 0.5g non-porous carrier multi-walled carbon nanotube (MWCNT, specific surface area is 30m 2 / g) in 200ml ethylene glycol solution. Aqueous sulfuric acid was added dropwise, and the pH of the solution was adjusted to 3 using pH test paper. The solution was refluxed under nitrogen atmosphere at 200° C. for 4 hours while stirring, so that the PtP catalyst was precipitated and supported on the multi-walled carbon nanotubes. After the reaction, filter, wash and dry to obtain a catalyst.

Embodiment 2

[0106] Dissolve 1.69mmol of bis(acetylacetonate) platinum (II) and 0.845mmol of sodium hypophosphite in 100ml of ethylene glycol respectively, and add to 0.5g of non-porous carrier acetylene black (AB, specific surface area is 68m 2 / g) in 200ml ethylene glycol solution. Aqueous sulfuric acid was added dropwise, and the pH of the solution was adjusted to 3 using pH test paper. Under a nitrogen atmosphere, the solution was refluxed for 4 hours while stirring at 200° C., so that the PtP catalyst was precipitated and supported on acetylene black. After the reaction, filter, wash and dry to obtain a catalyst.

Embodiment 3

[0108] Dissolve 1.69mmol of bis(acetylacetonate) platinum (II) and 0.845mmol of sodium hypophosphite in 100ml of ethylene glycol respectively, and add to disperse 0.5g of porous carrier carbon black (CB, specific surface area is 140m 2 / g) in 200ml ethylene glycol solution. Aqueous sulfuric acid was added dropwise, and the pH of the solution was adjusted to 3 using pH test paper. Under a nitrogen atmosphere, the solution was refluxed for 4 hours while stirring at 200° C., so that the PtP catalyst was precipitated and supported on carbon black. After the reaction, filter, wash and dry to obtain a catalyst.

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Abstract

PROBLEM TO BE SOLVED: To provide a fuel cell having a Pt catalyst that has a particle diameter of less than 5 nm at an oxygen electrode. ŽSOLUTION: In the fuel cell, having at least a fuel electrode, an oxygen electrode, and a solid polyelectrolyte film interposed between the fuel electrode and the oxygen electrode, the oxygen electrode contains catalyst in which two-dimensional system fine particles, expressed by general Formula PtP (in the Formula, composition of P is 2 to 50 at.%), are carried to a carbon nanotube. Ž

Description

technical field [0001] The present invention relates to a fuel cell and a membrane electrode assembly. More specifically, it relates to a fuel cell and a membrane electrode assembly using a novel platinum-based catalyst supported on a carbon carrier as an oxygen electrode catalyst. Background technique [0002] In the past, most of the electric energy was supplied by thermal power generation, hydroelectric power generation or nuclear power generation. However, thermal power generation not only causes large-scale environmental pollution due to the burning of fossil fuels such as oil and coal, but also has the problem of depletion of resources such as oil. In addition, hydroelectric power generation requires large-scale dam construction, which not only has to worry about the natural destruction caused by it, but also is limited by the suitable location for construction. Nuclear power generation is not only fatal due to radioactive pollution in the event of an accident, but a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/92H01M4/86B01J23/42B01J32/00B01J8/00
CPCY02E60/50Y02E60/522
Inventor 大门英夫鹈川公平关根正树
Owner HITACHT MAXELL LTD