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Preparation method of direct ethanol fuel cell anode catalyst

A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of large amount of Pt catalyst, easy poisoning and fracture efficiency, etc., and achieve the effect of improving anti-toxicity, improving fracture efficiency and high current density

Active Publication Date: 2018-10-19
江苏擎动新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing a direct ethanol fuel cell anode catalyst for the problems of large amount of Pt catalyst, easy poisoning and low efficiency of C-C fracture under low temperature conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Add 40g of glucose into 2L of deionized water, stir at 300r / min for 20min, then add 80g of 8% potassium permanganate solution dropwise at 1mL / min in a constant temperature water bath at 90°C, and keep stirring for 4h after the addition is complete , after cooling to room temperature, filter the filter residue, wash the filter residue 3 times with deionized water, place the filter residue in a drying oven, and dry to constant weight at 120°C to obtain carrier carbon spheres, take 0.18g of gadolinium oxide, 0.17g of samarium oxide , add 10g mass fraction of 20% nitric acid solution and stir at 300r / min for 15min, then add 2.0g cerium nitrate, 0.5g praseodymium nitrate, 0.8g citric acid, and continue stirring for 20min to obtain an activation solution. Take 500g absolute ethanol, 200g Add acetonitrile into the flask and mix evenly, and add 2g of carrier carbon spheres, disperse with 300W ultrasonic for 20min, then add 8g of tetrabutyl titanate under stirring condition of 15...

example 2

[0025] Add 45g of glucose into 2L of deionized water, stir at 350r / min for 25min, then add dropwise 90g of 8% potassium permanganate solution at 1mL / min in a constant temperature water bath at 95°C, and continue to keep stirring for 5h after the addition is complete , after cooling to room temperature, filter the filter residue, wash the filter residue 4 times with deionized water, place the filter residue in a drying oven, and dry to constant weight at 125°C to obtain carrier carbon spheres. Take 0.23g of gadolinium oxide and 0.25g of samarium oxide , add 12g mass fraction of 20% nitric acid solution and stir at 350r / min for 18min, then add 2.2g cerium nitrate, 0.8g praseodymium nitrate, 1.0g citric acid, and continue stirring for 25min to obtain an activation solution. Take 550g absolute ethanol, 220g Add acetonitrile into the flask and mix evenly, and add 2g of carrier carbon spheres, disperse with 300W ultrasonic for 25min, then add 9g of tetrabutyl titanate under stirring ...

example 3

[0027]Add 50g of glucose into 3L of deionized water, stir at 400r / min for 30min, then add 100g of 8% potassium permanganate solution dropwise at 2mL / min in a constant temperature water bath at 100°C, and keep stirring for 6h after the addition is complete , after cooling to room temperature, filter the filter residue, wash the filter residue 5 times with deionized water, place the filter residue in a drying oven, and dry to constant weight at 130°C to obtain carrier carbon spheres, take 0.27g gadolinium oxide, 0.26g samarium oxide , add 15g mass fraction of 20% nitric acid solution and stir at 400r / min for 20min, then add 2.4g cerium nitrate, 1.0g praseodymium nitrate, 1.2g citric acid, and continue stirring for 30min to obtain an activation solution. Take 600g absolute ethanol, 250g Add acetonitrile into the flask and mix evenly, add 3g of carrier carbon spheres, disperse with 300W ultrasonic wave for 30min, then add 10g of tetrabutyl titanate under stirring condition of 180r / ...

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Abstract

The invention relates to a preparation method of a direct ethanol fuel cell anode catalyst, and belongs to the technical field of fuel cells. The preparation method is characterized in that glucose isused as a raw material for preparing carbon spheres used as a carrier, and manganese dioxide is loaded to replace part of platinum, and on that basis, the efficient and low-cost catalyst is prepared;and meanwhile, rare earth elements are doped, so that electrons are easily excited and transferred from a conduction band, thus oxygen vacancy is promoted to develop, and the oxygen vacancy concentration of the catalyst is greatly increased, and as a result, the ion conductivity is improved; in addition, the crystal size of the material is reduced due to low synthesizing temperature; the C-C breaking efficiency under low temperature is improved. According to the method, TiO2 and Pt are coordinated to improve the catalyzing performance of the catalyst; and meanwhile, a CO type intermediate product produced by ethanol oxidizing is easily transferred to the TiO2 nanoparticle surface to be oxidized; the catalyzing activity and stability of the catalyst are improved while the Pt content is decreased; and moreover, the initial potential of the ethanol starting to oxidize is reduced; high current density is obtained, and as a result, the fuel cell performance is improved.

Description

technical field [0001] The invention relates to a method for preparing an anode catalyst of a direct ethanol fuel cell, belonging to the technical field of fuel cells. Background technique [0002] In direct ethanol fuel cells, the overpotential of anode polarization is still one of the key factors affecting the performance of the battery. Ethanol has high theoretical energy density and output voltage, but due to the complex oxidation process of ethanol and many intermediate products, its actual working voltage and energy density are much lower than the theoretical values. The key to solving this problem lies in the development of highly efficient electrocatalysts. [0003] Since the membrane used in most direct ethanol fuel cells is Nafion membrane (a commercial perfluorosulfonic acid membrane), the inside of the battery is a strongly acidic environment, which requires that the electrocatalyst on the anode side of the direct ethanol fuel cell must meet the following re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9016H01M4/9041Y02E60/50
Inventor 姜香王文新朱华
Owner 江苏擎动新能源科技有限公司
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