Modification method of electrolytic hydrogen production anode, electrolytic hydrogen production anode and application

A modification and anode technology, applied in the direction of electrodes, electrolytic components, electrolysis process, etc., can solve the problems of limited application, chloride ion corrosion, etc., achieve the effect of improving stability and selectivity, and delaying chloride ion corrosion anode

Active Publication Date: 2022-07-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For example, some non-precious metal oxygen evolution catalysts NiFe-LDH have been widely reported and studied due to their excellent performance and low cost, but they are easily corroded by chloride ions in seawater, which limits their use in aqueous solutions containing chloride ions, especially seawater electrolysis for hydrogen production. application in

Method used

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  • Modification method of electrolytic hydrogen production anode, electrolytic hydrogen production anode and application
  • Modification method of electrolytic hydrogen production anode, electrolytic hydrogen production anode and application
  • Modification method of electrolytic hydrogen production anode, electrolytic hydrogen production anode and application

Examples

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Effect test

Embodiment 1

[0071] (1) Cut commercial nickel foam (as a conductive substrate) into strips of 1 cm × 3 cm, at 2 mol·L -1 Ultrasonic treatment for 3 min in hydrochloric acid solution, then ultrasonic cleaning for three times in deionized water and absolute ethanol respectively, and natural drying in air for use.

[0072] (2) Dissolve 130.8 mg of nickel nitrate hexahydrate, 60.6 mg of ferric nitrate nonahydrate and 300 mg of urea in 36 mL of deionized water to prepare a solvothermal reaction solution containing nickel and iron, and transfer it to a 50 mL polytetrafluoroethylene material reaction tank middle.

[0073] (3) Immerse the cleaned nickel foam into the reaction solution, seal it in a stainless steel autoclave for solvothermal reaction at 120°C for 12h, cool it out, wash it with ultrapure water and ethanol, and place it in an oven at 60°C in the air Dry for 12h. at 5mA / cm 2 The Ag@NiFe-LDH / NF highly stable oxygen evolution catalyst was obtained by electroplating for 5 min at the c...

Embodiment 2

[0077] (1) Cut commercial nickel foam into strips of 1cm × 3cm, at 2mol·L -1 Ultrasonic treatment in the hydrochloric acid solution for 3min, then ultrasonic cleaning three times in deionized water and absolute ethanol respectively, and natural drying in the air for standby use, and the anode matrix NiFe-LDH / NF was prepared according to the same method as in Example 1.

[0078] (2) The parameter of magnetron sputtering is set to 300W, the sputtering time is 10s, and the vacuum degree of the vacuum chamber is adjusted to 0.3-5pa.

[0079] (3) Hang the dried NiFe-LDH / NF electrode sheet into a vacuum chamber and perform magnetron sputtering according to the parameters in (2) to obtain a highly stable Ag@NiFe-LDH / NF high stability oxygen evolution anode , the size of the sputtered silver particles is determined by the sputtering time, and the growth rate of the silver particles is controlled by the sputtering power, wherein the sputtering power is 300W and the sputtering 10s is th...

Embodiment 3

[0083] (1) Cut commercial nickel foam into strips of 1cm × 3cm, at 2mol·L -1 Ultrasonic treatment for 3 min in hydrochloric acid solution, then ultrasonic cleaning for three times in deionized water and absolute ethanol respectively, and natural drying in air for use.

[0084] (2) Dissolve 130.8 mg of nickel nitrate hexahydrate, 60.6 mg of ferric nitrate nonahydrate and 300 mg of urea in 36 mL of deionized water to prepare a solvothermal reaction solution containing nickel and iron, and transfer it to a 50 mL polytetrafluoroethylene material reaction tank middle.

[0085] (3) Immerse the cleaned nickel foam into the reaction solution, seal it in a stainless steel autoclave for solvothermal reaction at 120°C for 12h, cool it out, wash it with ultrapure water and ethanol, and place it in an oven at 60°C in the air Dry for 12h. The above electrodes were then soaked in a commercial chemical immersion silver plating solution for 10 minutes to obtain a highly stable Ag@NiFe-LDH / NF...

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Abstract

The invention discloses a modification method of an electrolytic hydrogen production anode, the electrolytic hydrogen production anode and application. The modification method of the electrolytic hydrogen production anode comprises the following steps: providing an anode matrix which can be used for catalytic electrolytic hydrogen production; a plurality of silver nano particles are deposited on the active surface of the anode substrate to form a silver nano layer, gaps exist among the silver nano particles, and part of the active surface is exposed from the gaps. According to the modification method provided by the invention, the surface of the anode substrate is covered with the silver nano layer, chloride ions are adsorbed to the silver surface in the electrolytic hydrogen production process to form a chlorine removal layer, other chloride ions in a solution are prevented from being continuously adsorbed on the surface of an electrode, and the effect of delaying corrosion of the chloride ions to the anode is achieved; and the proper silver nano-layer structure does not have great influence on the catalytic action of the anode matrix, so that the stability and selectivity of the anode in the seawater electrolysis hydrogen production reaction are improved.

Description

technical field [0001] The invention relates to the technical field of materials and energy catalysis, in particular to a modification method of an electrolytic hydrogen-producing anode, an electrolytic hydrogen-producing anode and applications. Background technique [0002] Excessive use of traditional fossil energy has led to serious energy shortages and environmental pollution problems. There is an urgent need to develop and utilize clean and renewable new energy to deal with energy shortages and environmental pollution problems. Efficient electrocatalytic overall water splitting is expected to alleviate the growing energy shortage. [0003] Oxygen production by electrolysis of water is an efficient, clean and low-cost oxygen production technology. However, the shortage and uneven distribution of freshwater resources limit the large-scale commercial application of this technology. [0004] However, under alkaline conditions, the kinetics of the oxygen evolution reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/081C25B11/061C25B11/055C25B11/031C25B1/04
CPCC25B11/081C25B11/061C25B11/055C25B11/031C25B1/04Y02E60/36
Inventor 陆之毅王忠锋徐雯雯
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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