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Ordered anode catalyst layer of PEM water electrolysis membrane electrode and preparation method and application thereof

An electrode catalyst layer, electrode catalyst layer technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of catalyst preparation method limitation, more cracks on the surface uniformity of the catalyst layer, expensive catalyst, etc., to achieve the preparation method Simple and easy to operate, widely used value, dispersibility and quantitative activity improvement effect

Active Publication Date: 2021-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Noble metal iridium-based and ruthenium-based catalysts are expensive, and their preparation methods are greatly limited
At present, the preparation of its metal catalyst layer mostly adopts the method of coating and roasting. The Fuzhou University team patent (CN109518221A) prepares an iridium dioxide catalyst by coating and roasting the surface of insoluble substrates such as titanium and platinum. However, the surface uniformity of the prepared catalyst layer is more cracks

Method used

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  • Ordered anode catalyst layer of PEM water electrolysis membrane electrode and preparation method and application thereof
  • Ordered anode catalyst layer of PEM water electrolysis membrane electrode and preparation method and application thereof
  • Ordered anode catalyst layer of PEM water electrolysis membrane electrode and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0043] Preparation of ordered WO by hydrothermal method 3 carrier

[0044] To prepare a tungstic acid solution, first weigh 1.25g of tungstic acid, add 10ml of 30 wt% hydrogen peroxide, add water to dissolve 30ml of water, stir at 85°C for 30min to form a milky white tungstic acid solution, add water to dilute, so that the concentration of tungstic acid is 0.05molL -1 .

[0045] Prepare the solution for hydrothermal reaction: weigh 0.056g thiourea and 0.064g maleic acid in sequence, measure 3.2mL 3M hydrochloric acid solution, add 4.8mL water and 30.4mL acetonitrile as solvent, and stir for 30min. Add the prepared tungstic acid solution and continue to stir for 60 minutes to complete the preparation of the reaction solution.

[0046] Cut pure tungsten sheet into 2.5*5.0cm 2 Size, ultrasonic in sequence with ethanol and deionized water for 20 minutes, then placed in 80°C, 25% hydrochloric acid solution to remove the oxide layer on the surface, take it out and rinse it with ...

Embodiment 2

[0056] 1. Preparation of ordered WO by hydrothermal method 3 carrier

[0057] To prepare a tungstic acid solution, first weigh 1.25g of tungstic acid, add 10ml of 30 wt% hydrogen peroxide, add water to dissolve 30ml of water, stir at 85°C for 30min to form a milky white tungstic acid solution, add water to dilute, so that the concentration of tungstic acid is 0.05molL -1 .

[0058] Prepare the solution for hydrothermal reaction: weigh 0.056g thiourea and 0.064g maleic acid in sequence, measure 3.2mL 3M hydrochloric acid solution, add 4.8mL water and 30.4mL acetonitrile as solvent, and stir for 30min. Add the prepared tungstic acid solution and continue to stir for 60 minutes to complete the preparation of the reaction solution.

[0059] Cut pure tungsten sheet into 2.5*5.0cm 2 Size, ultrasonic in sequence with ethanol and deionized water for 20 minutes, then placed in 80°C, 25% hydrochloric acid solution to remove the oxide layer on the surface, take it out and rinse it wi...

Embodiment 3

[0068] 1. Preparation of ordered WO by hydrothermal method 3 carrier

[0069] To prepare a tungstic acid solution, first weigh 1.25g of tungstic acid, add 10ml of 30 wt% hydrogen peroxide, add water to dissolve 30ml of water, stir at 85°C for 30min to form a milky white tungstic acid solution, add water to dilute, so that the concentration of tungstic acid is 0.05molL -1 .

[0070] Prepare the solution for hydrothermal reaction: weigh 0.056g thiourea and 0.064g maleic acid in sequence, measure 3.2mL 3M hydrochloric acid solution, add 4.8mL water and 30.4mL acetonitrile as solvent, and stir for 30min. Add the prepared tungstic acid solution and continue to stir for 60 minutes to complete the preparation of the reaction solution.

[0071] Cut pure tungsten sheet into 2.5*5.0cm 2 Size, ultrasonic in sequence with ethanol and deionized water for 20 minutes, then placed in 80°C, 25% hydrochloric acid solution to remove the oxide layer on the surface, take it out and rinse it wi...

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Abstract

The invention relates to a preparation method of an ordered anode catalyst layer of a PEM water electrolysis membrane electrode. A catalyst layer array provided by the invention is of a double-layer structure, a transition metal oxide array serves as a catalyst layer carrier, and a catalyst wraps the surface layer of the array. The catalyst layer has the characteristics of an ordered structure, a low noble metal catalyst loading amount and high-current-density stable operation. Specifically, a hydrothermal method is adopted to prepare a non-noble metal oxide which serves as an array carrier, a thin catalyst shell is prepared on the surface of the array through an electro-deposition technology, and an ordered oxygen evolution electrode is obtained. The membrane electrode catalyst layer has the advantages of simple and reliable preparation method and uniform structure. The prepared catalyst layer can be used for preparing a PEMWE (proton exchange membrane water electrolysis) membrane electrode, and low-cost, efficient and stable operation of PEM water electrolysis hydrogen production is realized.

Description

technical field [0001] The invention belongs to the field of electrolytic water membrane electrode preparation, and in particular relates to an ordered catalytic layer of a proton exchange membrane water electrolysis (PEMWE) membrane electrode, a preparation method and application thereof. Background technique [0002] Membrane electrode is a key component, and the cost reduction is the key factor to solve the commercial application of PEM water electrolysis. At present, iridium-based and ruthenium-based catalysts are recognized as having the highest oxygen evolution activity and are one of the key materials for PEM water electrolysis membrane electrodes. However, due to the lack of reserves of iridium and ruthenium elements in the earth, their prices are high, which hinders PEM electrolysis. The development of water, so reducing its usage in membrane electrodes has become a top priority. At present, noble metal catalysts doped with non-precious metals are generally used to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/052C25B11/067C25B11/081C25B1/04C25B9/23
CPCY02E60/36
Inventor 俞红梅姜广姚德伟范芷萱邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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