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Structure of membrane electrode for SPE water electrolysis and preparation and application thereof

A water electrolysis and membrane electrode technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low catalyst utilization, high catalyst dosage, poor electrode stability, etc., and achieve adjustable catalyst components and thin catalytic layer thickness , the effect of enhancing the binding force

Active Publication Date: 2017-05-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the problems of high catalyst consumption, low catalyst utilization rate and poor electrode stability of traditional SPE water electrolysis membrane electrodes, this patent provides a structure, preparation method and application of a membrane electrode for SPE water electrolysis

Method used

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  • Structure of membrane electrode for SPE water electrolysis and preparation and application thereof
  • Structure of membrane electrode for SPE water electrolysis and preparation and application thereof
  • Structure of membrane electrode for SPE water electrolysis and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] With 12K gold leaf (Au 50 Ag 50 wt.%) as the raw material, cut the gold foil into 2.1cm*2.1cm, spread the gold foil on the surface of deionized water, and transfer it to the nitric acid aqueous solution (the volume ratio of nitric acid and deionized water is 1:1), control The reaction time is 2 hours, and the reaction temperature is controlled at 25°C. Transfer the nanoporous gold film (NPG, nanoporous gold film) obtained after dealloying to deionized water, at this time, the nanoporous gold film spreads on the surface of deionized water; replace the deionized water 3-4 times to remove the nanoporous gold film. nitric acid on the gold film; the nanoporous gold film was transferred to a mica sheet (size 2.5cm*7.0cm), and dried at room temperature; the prepared nanoporous gold was labeled as NPG. The SEM section test shows that the prepared nanoporous gold has a thickness of 150nm; the pore size test shows that the porosity is 59.92%, and the characteristic pore size is...

Embodiment 2

[0062] Refer to Example 1 for the preparation and transfer process of the nanoporous gold film.

[0063] Prepare H at a concentration of 0.05M 2 IrCl 6 isopropanol solution, impregnate the NPG loaded on the mica sheet into the prepared H 2 IrCl 6 In the isopropanol solution, control the immersion time to 3.0min and the immersion temperature to 25°C. After the impregnation was completed, the mica sheet was taken out, the remaining precursor solution on the surface was sucked off, and the impregnated NPG was dried at room temperature.

[0064] The NPG impregnated with the catalyst precursor was placed in a tube furnace and calcined at 400 °C, 450 °C, and 500 °C for 30 min to prepare the catalytic layer, and the roasting atmosphere was air.

[0065] Reheat pressed on 212 (DuPont) membrane, the transfer pressure was 2.0MPa, the time was 30s, and the mica substrate was removed after transfer.

[0066] The electrodes prepared by firing at 400°C, 450°C, and 500°C are marked as...

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Abstract

The invention provides a structure of a membrane electrode for SPE water electrolysis and preparation and application thereof. At first, gold foil serves as a raw material, a dealloying method is adopted for obtaining a nanometer porous gold thin film, the nanometer porous gold thin film serves as a supporting layer to carry a catalyst to prepare a catalyzing layer, then the catalyzing layer is transferred to an ion exchange membrane, and the membrane electrode is prepared. The constructed membrane electrode has the beneficial effects of being low in catalyst carrying amount, high in catalyst utilization rate, easy to enlarge and the like.

Description

technical field [0001] The invention relates to the field of solid polymer electrolyte (SPE) water electrolysis, in particular to a structure and a preparation method of a membrane electrode for SPE water electrolysis. The prepared membrane electrode can be used in water electrolysis cell. Background technique [0002] With the continuous development of technology and economy, the demand for energy in human society continues to increase. The development of a clean and efficient energy storage technology has become the appeal of all mankind. [0003] As a clean and efficient energy carrier, hydrogen has become the research focus of governments and research institutions around the world. Electrolytic lye hydrogen production technology was once the mainstream technology for large-scale hydrogen production. However, the electrolyte is prone to loss, and the asbestos diaphragm used is harmful to the environment, which led to the elimination of this technology. The solid polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/03C25B1/04H01M8/1004
CPCC25B1/04C25B11/031C25B11/051H01M8/1004Y02E60/36Y02E60/50
Inventor 邵志刚曾亚超郭晓倩王志强俞红梅衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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