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Multi-component alloy catalyst as well as preparation method and application thereof

A multi-element alloy and catalyst technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of large particles, insufficient alloying degree of platinum-carbon catalysts, and inability to fully meet the performance requirements of the catalyst, and achieve high catalyst activity and excellent catalytic performance. Activity and catalytic stability, beneficial to large-scale industrial production

Inactive Publication Date: 2021-11-05
WUXI WEIFU HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the prior art, the degree of alloying of platinum-carbon catalysts is insufficient and the particles are large, so as a cathode catalyst for a fuel cell membrane electrode, sometimes it cannot fully meet the performance requirements

Method used

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  • Multi-component alloy catalyst as well as preparation method and application thereof
  • Multi-component alloy catalyst as well as preparation method and application thereof
  • Multi-component alloy catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0051] In the first aspect, an embodiment of the present invention provides a method for preparing a multi-element alloy catalyst. The multi-element alloy catalyst includes metal platinum and other metals different from platinum, and the other metals include a first metal and a second metal, specifically including The following steps:

[0052] Step S1, prepare carbon material mixed slurry: disperse carbon material in solvent, add platinum source raw material liquid and other metal raw material liquid, and shear and disperse for 0.5-24h, for example, it can be 0.5h, 1h, 5h, 10h, 15h , 20h, 24h, etc., to form a uniform suspension; add additives to the suspension, ultrasonic 0.5 ~ 24h, such as 0.5h, 1h, 5h, 10h, 15h, 20h, 24h, etc., and then at 20 ~ 80 ° C Stir for 0.5-24 hours, for example, the temperature can be 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C, etc., and the stirring time can be 0.5h, 1h, 5h, 10h, 15h, 20h, 24h, etc. , forming a carbon material mixed slurry;

[0053]...

Embodiment 1

[0091] A preparation method of multi-component alloy catalyst, comprising the following steps:

[0092] Step S1, treat XC-72R carbon black at 2300°C for 12 hours, weigh 5g of XC-72R carbon black and disperse it in 100mL of water, add 20mL of ethylene glycol solution with a concentration of 200g / L chloroplatinic acid, and 5mL with a concentration of 100g / L of nickel sulfate aqueous solution, 5mL of cobalt sulfate aqueous solution with a concentration of 100g / L, and shear and disperse for 0.5h to form a uniform suspension; add 0.5g of ascorbic acid and 0.5g of citric acid monohydrate to the suspension, and ultrasonicate for 0.5h Afterwards, the temperature was raised to 80° C., and stirred for 2 hours to form a carbon material mixed slurry;

[0093]Step S2, put the carbon material mixed slurry obtained in step S1 into a reaction kettle, place the reaction kettle in a microwave oven, react at 180°C for 120min, then press filter and wash, and dry at 80°C for 12h to obtain the dri...

Embodiment 2

[0096] A preparation method of multi-component alloy catalyst, comprising the following steps:

[0097] Step S1, treat graphene at 2300°C for 12 hours, weigh 5g of graphene and disperse it in 100mL of water, add 20mL of ethylene glycol solution with a concentration of 200g / L chloroplatinic acid, and 5mL of an aqueous solution of nickel sulfate with a concentration of 100g / L , 5mL of cobalt sulfate aqueous solution with a concentration of 100g / L, and shear and disperse for 0.5h to form a uniform suspension; add 0.5g of ascorbic acid and 0.5g of citric acid monohydrate to the suspension, and after ultrasonication for 0.5h, heat up to 80°C , and stirred for 2 hours to form a carbon material mixed slurry;

[0098] Step S2, put the carbon material mixed slurry obtained in step S1 into a reaction kettle, place the reaction kettle in a microwave oven, react at 180°C for 120min, then press filter and wash, and dry at 80°C for 12h to obtain the dried The dried powder is first calcined...

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Abstract

The invention provides a preparation method of a multi-component alloy catalyst. The preparation method comprises the following steps of: S1, carbon material mixed slurry preparation, specifically, dispersing a carbon material in a solvent, adding a platinum source raw material solution and other metal raw material solutions to form a uniform suspension, and then adding an additive to form carbon material mixed slurry; S2, alloying process, specifically, carrying out reaction on the carbon material mixed slurry in the S1 at 80-180 DEG C for 1-120 minutes, then carrying out filter pressing, washing and drying, and then roasting in a protective atmosphere to obtain solid powder; and S3, surface platinum enrichment treatment, specifically, adding the solid powder obtained in the S2 into a treatment solution for treatment, and then filtering, washing and drying to obtain the platinum multi-component alloy catalyst. The platinum alloy prepared by the method of the embodiment of the invention is small and uniform in particle size and high in alloying degree, and has excellent catalytic activity and catalytic stability.

Description

technical field [0001] The invention belongs to the field of multi-component platinum-based alloy carbon catalysts, and in particular relates to a multi-component alloy catalyst and its preparation method and application. Background technique [0002] The multi-component alloy catalyst is a kind of platinum-based catalyst, which is mainly used in the catalytic layer of the membrane electrode of the proton exchange membrane fuel cell. The catalytic layer is divided into a cathode catalytic layer and an anode catalytic layer. The working principle is that hydrogen is decomposed into H+ in the anode catalytic layer, and electrons are released. The electrons are drawn to the cathode through the load, and the H+ reaches the cathode through the proton exchange membrane, thereby generating electrical energy. . [0003] Platinum metal is expensive due to lack of resources, which makes the price of catalysts and the cost of fuel cells remain high, hindering the commercialization of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/926H01M4/8878H01M4/8885Y02E60/50
Inventor 李彦杰华秋茹张明刘凯包喆宇陈杰张义煌
Owner WUXI WEIFU HIGH TECH CO LTD
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