Carbon particle having deposited fine particles, process forproducing the same, and electrode for fuel cell

A manufacturing method and technology of carbon particles, applied in fuel cells, battery electrodes, solid electrolyte fuel cells, etc., to achieve the effect of preventing corrosion and reducing usage

Inactive Publication Date: 2009-06-24
HITACHI MAXELL ENERGY LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, plasma treatment requires special equipment

Method used

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  • Carbon particle having deposited fine particles, process forproducing the same, and electrode for fuel cell
  • Carbon particle having deposited fine particles, process forproducing the same, and electrode for fuel cell
  • Carbon particle having deposited fine particles, process forproducing the same, and electrode for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] "LaFeO 3 / Pt=94 / 6 weight ratio, 40 weight% loading / carbon>

[0089] Dissolve 2.23g of lanthanum nitrate hexahydrate, 2.08g of iron nitrate nonahydrate and 0.14g of chloroplatinic acid hexahydrate in a mixed solution of 80ml of water / 20ml of ethanol, and add 2.16g of citric acid to make and platinum citrate complex ions in water.

[0090] Then, 2 g of Vulcan XC-72 (registered trademark, carbon black manufactured by CABOT Co., Ltd., average particle diameter 30 nm, the same below) as carbon particles was impregnated with about 2 ml of the aqueous solution containing citric acid complex ions, and placed at 90° C. its dry. After mixing them with a mortar, soak them again with 2 ml of the aqueous solution containing citric acid complex ions, dry them at 90°C, mix them with a mortar, and repeat this process. Immersed in aqueous solution to make the complex adsorb on the surface of Vulcan. Then, it was dried at 90° C. for about 10 minutes in a low-humidity atmosphere to ob...

Embodiment 2

[0093] "LaFeO 3 / Pt=94 / 6 weight ratio, 20 weight% loading / carbon>

[0094]In the preparation method of the microparticle-loaded carbon particles of Example 1, except that after preparing an aqueous solution of citrate complex ions containing lanthanum, iron and platinum, and then impregnating it with 5 g of Vulcan XC-72, the same operation as in Example 1 was carried out, Carbon particles loaded with perovskite-type oxide particles containing platinum particles are obtained, that is, LaFeO-loaded 3 / Pt carbon particles.

[0095] For the loaded LaFeO thus obtained 3 / Pt carbon particles were measured by XRD, and as a result of Example 1, a clear single-phase peak of the perovskite structure appeared, and no peak related to platinum particles was observed. At this time, the average crystallite size obtained from the half width of the diffraction peak was 8.6 nm. As a result of TEM observation, it was confirmed that composite metal oxide fine particles of about 5 to 10 nm wer...

Embodiment 3

[0097] "LaFeO 3 / Pt=85 / 15 weight ratio, 40 weight% loading / carbon>

[0098] In the preparation method of microparticle-loaded carbon particles in Example 1, except that 1.89 g of lanthanum nitrate hexahydrate, 1.77 g of iron nitrate nonahydrate and 0.42 g of chloroplatinic acid hexahydrate were dissolved in a mixed solution of 80 ml of water / 20 ml of ethanol Otherwise, the same operation as in Example 1 was carried out to obtain carbon particles loaded with perovskite-type oxide particles containing platinum particles, that is, LaFeO-loaded particles. 3 / Pt carbon particles.

[0099] For the loaded LaFeO thus obtained 3 / Pt carbon particles were measured by XRD, and as a result of Example 1, a clear single-phase peak of the perovskite structure appeared, and no peak related to platinum particles was observed. At this time, the average crystallite size obtained from the half width of the diffraction peak was 18.3 nm. As a result of TEM observation, it was confirmed that com...

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Abstract

The present invention provides carbon particles with fine particles deposited thereon and a manufacturing method thereof. The carbon particles with fine particles deposited thereon is characterized in that the surface of carbon particle is loaded with perovskite type composite metal oxide particles. The entire body particle of the perovskite type composite metal oxide particle is provided with noble metal particle. The carbon particles with fine particles deposited thereon can replace the commonly used platinum-loaded carbon particle or metal platinum particle for being used as electrode catalyst of fuel cell, etc. Furthermore the use amount of platinum can be greatly reduced compared with the previous platinum-loaded carbon particle. The structure is that the perovskite type composite metal oxide particle is loaded on the carbon particle. The entire body of perovskite type composite metal oxide particle is provided with noble metal particles and the dimension of minicrystal is 1-20nm. For manufacturing the carbon particles with fine particles deposited thereon, the method comprising the following steps can be adopted: preparing a solution comprising the metal complexion forming the perovskite type composite metal oxide particles and noble metal particles, subsequently repeating the step of impregnating the solution into carbon particles and dried the particles thereby adsorbing complex ions of the metal onto the carbon particles, and then subjecting the resultant particles to heat treatment.

Description

technical field [0001] This patent application is based on Japanese Patent Application No. 2006-164095 (filed on June 13, 2006), and claims priority under the Paris Convention. By citing here, all the contents described in the above application constitute a part of this specification. [0002] The present invention relates to fine-particle-loaded carbon particles and a method for producing the same, and more particularly to fine-particle-loaded carbon particles loaded with perovskite-type composite metal oxide particles in which noble metal particles exist throughout the perovskite-type oxide particles, and A method for producing the same, and an electrode for a fuel cell including the particles. Background technique [0003] Conventionally, metal particles, alloy particles, metal oxide particles, and the like supported on carrier particles have been used in various catalysts such as deodorization, antibacterial, purification of automobile exhaust, fuel cells, and NOx reduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M4/86H01M4/88H01M4/90H01M8/10B01J23/89C01G49/00C01G51/00B82Y30/00B82Y99/00H01M4/92
CPCC01P2004/04Y02E60/50H01M4/921C01G51/006H01M4/923H01M4/926H01M4/885C01G49/0054C01P2002/72C01P2002/74C01B31/02C01P2004/64C01P2002/60C01P2006/40B82Y30/00H01M4/925C01P2002/80H01M2008/1095H01M4/9033C01G51/003H01M4/92C01P2002/85C01P2002/34H01M4/8647C01P2004/80C01B32/05Y10T428/2991
Inventor 泽木裕子岸本干雄中西治通村田成亮今西雅弘
Owner HITACHI MAXELL ENERGY LTD
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