Microwave preparation method of fuel cell dual-component alloy catalyst

A technology of alloy catalyst and fuel cell, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of difficult industrial scale-up, difficult control of particle size, and many preparation steps, and achieve simple equipment, element ratio and particle size Controllable, short-cycle effects

Inactive Publication Date: 2020-08-25
WUXI WEIFU HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of preparing platinum-palladium catalyst in patent CN105642309A, a platinum-based catalyst is used, and then palladium element is added to roast at a high temperature of 700-1000°C to alloy it, which consumes a lot of energy and is not easy to industrialize.
In the current preparation methods of binary alloy catalysts, most of them need to prepare platinum catalyst in advance, and then add another element to high-temperature roasting to form a binary alloy. There are many preparation steps, complicated equipment, difficult control of particle size, high energy consumption and high cost.

Method used

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  • Microwave preparation method of fuel cell dual-component alloy catalyst
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Embodiment 1

[0029] A microwave preparation method for a fuel cell binary alloy catalyst, comprising the steps of: weighing 0.24g carbon carrier, measuring 52mL of 5.2g / L ethylene glycol solution of chloroplatinic acid, 10mL of 29.1g / L cobalt chloride ethylene glycol solution, ultrasonically dispersed in 120mL of ethylene glycol to make a suspension, add 12mL of aqueous solution containing 2g of sodium hydroxide to the suspension, stir for 10min, put it into a microwave oven with a power of 1000W and heat it to boiling, and drop to After standing still at room temperature for 30 minutes, add 18 mL of sulfuric acid with a concentration of 6 mol / L, let stand for 12 hours, centrifuge and wash, and blow dry at 80°C to obtain catalyst powder.

Embodiment 2

[0031] A microwave preparation method for a fuel cell binary alloy catalyst, comprising the steps of: weighing 5g of carbon carrier, measuring 50mL of ethylene glycol solution of 100g / L chloroplatinic acid, 100mL of 60g / L cobalt nitrate in ethylene glycol Solution, ultrasonically dispersed in 2L ethylene glycol to make a suspension, add 360mL of aqueous solution containing 40g of sodium hydroxide to the suspension, stir for 30min, put it into a microwave oven with a power of 6000W, heat it to boiling, and let it stand at room temperature After 30 minutes, 60 mL of sulfuric acid with a concentration of 18.4 mol / L was added, left to stand for 12 hours, centrifuged and washed, and dried by blowing at 60°C to obtain catalyst powder.

Embodiment 3

[0033] A kind of microwave preparation method of fuel cell binary alloy catalyst, comprises the following steps: take by weighing 0.4g carbon carrier, measure the ethylene glycol solution of the 40g / L chloroplatinic acid of 10mL, the ethylene glycol solution of the 30g / L copper sulfate of 5mL Alcohol solution, ultrasonically dispersed in 400mL of ethylene glycol to make a suspension, add 120mL of aqueous solution containing 2g of sodium formate and 5g of sodium hydroxide to the suspension, stir for 30min, put it into a microwave oven with a power of 2000W and heat it to boiling, then drop to After standing still at room temperature for 30 minutes, add 100 mL of sulfuric acid with a concentration of 1 mol / L, let stand for 12 hours, centrifuge and wash, and blow dry at 80°C to obtain catalyst powder.

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a microwave preparation method of a fuel cell dual-component alloy catalyst. The preparation method disclosed bythe invention comprises a precursor suspension preparation process, a microwave reaction process and a catalyst pickling treatment process; platinum and transition metal are synchronously reduced byutilizing an additive and microwaves, the dual-component alloy catalyst is synthesized in one step, and roasting can be carried out at a relatively low temperature or even the roasting process is omitted, so that the growth of alloy particles is effectively inhibited; unalloyed transition metal element can be removed through acid pickling after microwave reduction; the process and equipment are simple, the synthesis period is short, and industrial production is easy to achieve; the transition metal and platinum are used for preparing the dual-component alloy catalyst, so that the use amount ofprecious metal platinum is reduced, and the cost of the catalyst can be effectively reduced; and the prepared catalyst is good in alloying degree, controllable in element proportion and particle sizeand high in catalytic activity and stability.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a microwave preparation method of a fuel cell binary alloy catalyst. Background technique [0002] Fuel cell technology is widely used in industries such as automobiles, aviation, energy storage, power generation, and ships. Among them, proton exchange membrane fuel cells have the advantages of high energy efficiency, environmental friendliness, fast start-up speed, and safe and reliable operation. research hotspot. Catalysts are the key materials of fuel cells. The cost and performance of catalysts directly affect the cost and performance of fuel cells. Therefore, the task of developing high-performance and low-cost catalysts is very urgent. [0003] Due to the high difficulty in the preparation of multi-component alloy catalysts, the difficulty in controlling the proportion of elements, and the high difficulty in industrialization, the research on binary alloy c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92
CPCH01M4/8825H01M4/926H01M4/9083H01M4/9041H01M4/921Y02E60/50
Inventor 华秋茹张义煌张明刘倩包喆宇陈杰李刚
Owner WUXI WEIFU HIGH TECH CO LTD
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