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Electrode catalyst for fuel cell, method for producing the same, and fuel cell using the electrode catalyst

一种电极催化剂、燃料电池的技术，应用在燃料电池、电池电极、固体电解质燃料电池等方向，达到发电性能和耐久性提高的效果

Active Publication Date: 2010-03-24
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] However, the Pt-Ce catalysts, Pt-Mn catalysts, Pt-M catalysts, and Pt-Cr-Ce alloy catalysts described in these patent documents 4, 5, and 6 are not catalysts that have both high current density and high durability.

Method used

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  • Electrode catalyst for fuel cell, method for producing the same, and fuel cell using the electrode catalyst
  • Electrode catalyst for fuel cell, method for producing the same, and fuel cell using the electrode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 5.3 g of a commercially available high specific surface area carbon powder was added to 0.5 L of pure water and dispersed. A hexahydroxyplatinum nitrate solution containing 3.5 g of platinum, an iridium nitrate solution containing 1.2 g of iridium, and a cerium nitrate solution containing 0.05 g of cerium were successively added dropwise to this dispersion liquid, and the carbon was fully blended. About 100 mL of 0.1N ammonia was added thereto to adjust the pH to 10, and each hydroxide was formed and precipitated on carbon. This dispersion liquid was filtered, and the obtained powder was vacuum-dried at 100° C. for 10 hours. Subsequently, the reduction treatment was carried out by holding at 400° C. for 2 hours in a hydrogen atmosphere, and alloying was carried out by holding at 600° C. for 10 hours in a nitrogen atmosphere.

[0055] The respective metal loading densities of the obtained platinum alloy-supported carbon powder catalyst were 35% by weight of platinum, 12...

Embodiment 2

[0057] 5.2 g of a commercially available high specific surface area carbon powder was added to 0.5 L of pure water and dispersed. A hexahydroxyplatinum nitrate solution containing 4.5 g of platinum, a cobalt nitrate solution containing 0.5 g of cobalt, and a cerium nitrate solution containing 0.05 g of cerium were sequentially added dropwise to this dispersion liquid to fully blend with carbon. About 100 mL of 0.1N ammonia was added thereto to adjust the pH to 10, and each hydroxide was formed and precipitated on carbon. This dispersion liquid was filtered, and the obtained powder was vacuum-dried at 100° C. for 10 hours. Subsequently, the reduction treatment was carried out by holding at 400° C. for 2 hours in a hydrogen atmosphere, and alloying was carried out by holding at 800° C. for 10 hours in a nitrogen atmosphere.

[0058] In order to remove non-alloyed metal components from 10 g of the catalyst, it was stirred in 1 L of a 2 mol / L nitric acid solution, kept at a liqui...

Embodiment 3

[0061] For Example 1, PtFeCe was synthesized by using ferric nitrate instead of iridium nitrate solution.

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Abstract

Disclosed is an electrode catalyst for fuel cells, wherein a catalyst metal particle composed of a three-component alloy, namely an alloy of a noble metal, a base metal and Ce (cerium), is supported by a carbon material. The noble metal is one or more metals selected from Pt, Ru, Rh, Pd, Ag and Au; the base metal is one or more metals selected from Ir, Co, Fe, Ni and Mn; and the composition ratio(molar ratio) among the noble metal, the base metal and Ce (cerium) is 20-95:5-60:0.1-3. The electrode catalyst for fuel cells enables to suppress deterioration of an electrolyte in an electrolyte membrane or an electrode catalyst layer, thereby improving durability. In addition, the electrode catalyst for fuel cells enables to improve power generation performance of a fuel cell, especially that in a high current density region.

Description

technical field [0001] The present invention relates to an electrode catalyst for a fuel cell having high current density and high durability, a method for producing the same, and a fuel cell having the electrode catalyst. Background technique [0002] The product produced by the cell reaction of the fuel cell is water in principle, and it is attracting attention as a clean power generation system that hardly affects the global environment. For example, in a solid polymer fuel cell, a pair of electrodes are provided on both sides of a proton-conductive solid polymer electrolyte membrane, hydrogen is supplied as a fuel gas to one electrode (fuel electrode: anode), and oxygen or air is used as an oxidant to supply Different electrodes (air electrode: cathode) feed the battery from which the electromotive force is obtained. [0003] Solid polymer fuel cells are based on (1) the development of polymer electrolyte membranes with high ion conductivity, and (2) the use of polymer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B01J23/46B01J23/75H01M4/92H01M8/10
CPCB01J35/006B01J23/894Y02E60/521B01J23/63B01J23/002B01J23/83Y02E60/50H01M4/921B01J23/6562H01M8/1002B01J23/755B01J2523/00H01M4/926H01M8/1007B01J35/393B01J2235/15B01J2523/3712B01J2523/828B01J2523/847B01J2523/827B01J2523/845B01J2523/842B01J2523/72
Inventor 高桥宏明堀内洋辅永田贵宽寺田智明田端寿晴
Owner TOYOTA JIDOSHA KK
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