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Composite hydrogen evolution negative pole with micropore hydrogen storage layer and preparing method for composite hydrogen evolution negative pole

A hydrogen evolution cathode and hydrogen storage layer technology, applied in electrodes, coatings, metal material coating processes, etc., can solve problems such as poor bonding and complex processes, and achieve the effects of improving bonding, simple preparation process, and easy industrial production.

Inactive Publication Date: 2016-02-24
派新(上海)能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a hydrogen evolution catalytic electrode for water electrolysis hydrogen production and its preparation method, which solves the shortcomings of complicated process and poor combination in the current hydrogen storage layer preparation process

Method used

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  • Composite hydrogen evolution negative pole with micropore hydrogen storage layer and preparing method for composite hydrogen evolution negative pole
  • Composite hydrogen evolution negative pole with micropore hydrogen storage layer and preparing method for composite hydrogen evolution negative pole
  • Composite hydrogen evolution negative pole with micropore hydrogen storage layer and preparing method for composite hydrogen evolution negative pole

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Embodiment 1

[0039] Substrate pretreatment: Soak the substrate in lye to remove surface oil stains. The lye is NaOH solution with a mass fraction of 20%, the temperature is 85°C, and the time is 1h. It is cleaned with deionized water and then sandblasted. The substrate surface is roughened. will Ni 50 al 50 Alloy powder and LaNi 5The alloy powder is uniformly mixed in a weight ratio of 0.8:0.05, and the alloy powder is sprayed onto the substrate by plasma spraying. The process parameters of spraying are: spraying voltage 75V, spraying current 450A, main gas (argon) 65L / min, secondary gas (hydrogen) 45L / min, powder delivery speed 80g / min, spraying distance 120mm. Soak the sprayed substrate in a KOH solution with a mass fraction of 10% and a temperature of 45°C for 12 hours for activation treatment to form a microporous structure with a thickness of 100um and hydrogen storage performance. The catalyst layer is prepared by thermal decomposition, 150g / L acetic acid solution, 80g / L SnCl 2 ...

Embodiment 2

[0041] Substrate pretreatment: Soak the substrate in lye to remove surface oil stains, where the lye is 10% NaOH solution at a temperature of 70°C for 1.5 hours, clean it with deionized water, and then perform sandblasting. Roughen the substrate surface. will Ni 50 al 50 Alloy powder and LaNi 5 The alloy powder is mixed in a weight ratio of 0.8:0.1, and the alloy powder is sprayed onto the substrate by plasma spraying. The process parameters of spraying are: spraying voltage 60V, spraying current 300A, main gas (argon) 40L / min, auxiliary gas (hydrogen) 30L / min, powder delivery speed 20g / min, spraying distance 75mm. Soak the sprayed substrate in a KOH solution with a mass fraction of 20% and a temperature of 40°C for 20h for activation treatment to form a microporous structure with a thickness of 10um and hydrogen storage performance. The catalyst layer is prepared by thermal decomposition, 20g / L acetic acid solution, 10g / L SnCl 2 2H 2 The O liquid is mixed evenly accordi...

Embodiment 3

[0043] Substrate pretreatment: Soak the substrate in lye to remove surface oil stains, where the lye is 30% NaOH solution at a temperature of 65°C for 2 hours, clean it with deionized water, and then perform sandblasting. The substrate surface is roughened. will Ni 50 al 50 Alloy powder and LaNi 5 The alloy powder is mixed in a weight ratio of 0.8:0.2, and the alloy powder is sprayed onto the substrate by plasma spraying. The spraying process parameters are: spraying voltage 85V, spraying current 650A, main gas (argon) 95L / min, secondary gas (hydrogen) 55L / min, powder delivery speed 100g / min, spraying distance 135mm. Soak the sprayed substrate in a KOH solution with a mass fraction of 30% and a temperature of 60°C for 16 hours for activation treatment to form a microporous structure with a thickness of 50 um and hydrogen storage properties. The catalyst layer is prepared by thermal decomposition, 200g / L acetic acid solution, 100g / L SnCl 2 2H 2 The O liquid is mixed evenl...

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Abstract

The invention discloses a composite hydrogen evolution negative pole with a micropore hydrogen storage layer and a preparing method for the composite hydrogen evolution negative pole. The method includes the steps that (1) base body pretreatment, wherein a base body is subject to alkali soaking and washing, and then sand blasting is carried out; (2) a hydrogen storage middle layer is prepared, wherein the step includes the steps: (2.1) plasma thermal spraying treatment is carried out, a Ni50A150 alloy and hydrogen storage alloy powder are evenly mixed according to the weight ratio being (0.95-0.8): (0.05-0.2), and a plasma spraying device is used for spraying; and (2.2) activating treatment is carried out, the base body treated in the step (2.1) is placed into a first alkaline solution to be soaked, excitation is carried out, and the micropore middle layer with the high specific surface area and the high hydrogen storage performance is obtained; and (3) a thermal decomposition method is adopted for preparing a catalyst layer on the hydrogen storage middle layer. The preparing method is simple and reliable in preparation process, the commercial process is easily achieved; and the prepared composite hydrogen evolution pole has the beneficial effects that the hydrogen evolution catalytic activity is high; during continuous electrolysis, the countercurrent resisting capacity is high, and the service life of the pole is long.

Description

technical field [0001] The invention belongs to the field of electrolytic hydrogen production, and relates to a composite hydrogen evolution cathode with a microporous hydrogen storage layer and a preparation method thereof. The prepared hydrogen evolution electrode (cathode) is mainly used in chlor-alkali, water electrolysis and other industries. Background technique [0002] Hydrogen energy has attracted widespread attention because of its wide source, high efficiency and cleanliness, and is considered to be an ideal energy source for human beings in the future. Alkaline water electrolysis hydrogen production is an important technology to achieve large-scale hydrogen production, but high energy consumption is an important factor limiting the development of this technology. The cell pressure of the alkaline electrolytic cell is mainly composed of three parts: the theoretical decomposition voltage of water, the overpotential of the electrode reaction, and the ohmic pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/04C25B1/04C23C4/134C23C4/08
CPCC23C4/08C25B1/04C25B11/051C25B11/091Y02E60/36
Inventor 张延峰沈陈炎黄小彬
Owner 派新(上海)能源技术有限公司
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