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Catalyst carrier and method for manufacturing same

A technology of catalyst carrier and manufacturing method, which is applied in the direction of catalyst carrier, catalyst activation/preparation, chemical instruments and methods, etc., which can solve the problems that high battery output power cannot be expected, and achieve the effect of high durability and high output power

Inactive Publication Date: 2017-08-18
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high battery output cannot be expected with catalysts that do not contain noble metals such as Pt

Method used

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  • Catalyst carrier and method for manufacturing same
  • Catalyst carrier and method for manufacturing same
  • Catalyst carrier and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] (Production of Carbon Particle B(1))

[0106] 5 g of titanium dioxide particles (anatase type, average particle size 7 nm, ST-01 manufactured by Ishihara Sangyo Co., Ltd.) and 5 g of polyvinyl alcohol powder (manufactured by Kanto Chemical Co., Ltd.) were uniformly mixed using a ball mill to obtain a solid mixed powder. This powder was put into a tubular furnace, heated to 700°C in an atmosphere of a mixed gas of hydrogen and nitrogen containing 4% by volume of hydrogen, and heat-treated at 700°C for 1 hour to obtain carbon particles wrapped with titanium dioxide particles. Oxide-carbon composite particles (hereinafter also referred to as "carbon particles B (1)"). The transmission electron microscope image of the carbon particle B(1) is shown in figure 1 . In the figure, (1) represents titanium dioxide particles, and (2) represents carbon in carbon particles B (1).

[0107] (Production of Catalyst Carrier)

[0108] Commercially available carbon material (BET specif...

Embodiment 2

[0136] Carbon particles B (1) were obtained in the same manner as in Example 1, and the carbon material (1) was mixed with the carbon particles B (1) to obtain a catalyst carrier (2). However, the ratio of the titanium dioxide particles to the total mass of the catalyst carrier (2) was 59% by mass.

[0137] Thereafter, platinum and cobalt were supported on the catalyst carrier (2) in the same manner as in Example 1, and heat treatment was performed to alloy the platinum and cobalt to obtain an electrode catalyst (2), and a fuel cell was fabricated and evaluated. The results are shown in Table 1.

Embodiment 3

[0139] Carbon particles B (1) were obtained in the same manner as in Example 1, and the carbon material (1) was mixed with the carbon particles B (1) to obtain a catalyst carrier (3). However, the ratio of the titanium dioxide particles to the total mass of the catalyst carrier (3) was 25% by mass.

[0140] Thereafter, platinum and cobalt were supported on the catalyst carrier (3) in the same manner as in Example 1, and heat treatment was performed to alloy the platinum and cobalt to obtain an electrode catalyst (3), and a fuel cell was fabricated and evaluated. The results are shown in Table 1.

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Abstract

The purpose of the present invention is to provide a catalyst carrier having little performance decrease even in low humidity conditions and exhibiting high durability, an electrode catalyst, an electrode containing the catalyst, a membrane electrode assembly having the electrode, and a fuel cell provided with the membrane electrode assembly. The present invention is a catalyst carrier having a BET specific surface area of 450-1100 m2 / g, the catalyst carrier containing: a carbon material having a chain structure in which carbon particles are chained; and oxide carbon composite particles in which carbon particles enclose particles of an oxide of an element in group 4 of the Periodic Table, the oxide carbon composite particles being contained in the carbon material.

Description

technical field [0001] The present invention relates to a catalyst carrier, a catalyst metal, an electrode catalyst, an ink containing the electrode catalyst, a catalyst layer containing the electrode catalyst, an electrode having the catalyst layer, a membrane electrode assembly having the catalyst layer, and a membrane electrode assembly having the catalyst layer. fuel cell. Background technique [0002] Solid polymer fuel cells mainly use an electrode catalyst in which a catalyst metal including platinum is supported on a carbon carrier. However, the carbon carrier used as a conventional catalyst carrier is easily oxidized under high-potential operation such as start-stop operation of the fuel cell, so the supported catalyst metal aggregates, detaches, etc., and this becomes the main cause of performance degradation of the electrode catalyst. reason. [0003] In addition, in order to reduce the load on the components of the fuel cell system, it is desirable to operate t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/10B01J21/18B01J23/89B01J32/00B01J37/04B01J37/08B01J37/18H01M4/86H01M4/90H01M4/92H01M4/96H01M8/10H01M8/1004
CPCH01M4/9083H01M4/926B01J37/084B01J21/04B01J23/8913B01J21/18Y02E60/50B01J35/23B01J35/33B01J35/397B01J35/60B01J37/08B01J23/89H01M8/10H01M4/92H01M4/96
Inventor 李建灿高桥浩北河友也
Owner RESONAC HOLDINGS CORPORATION
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