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Preparation method of NiMoP electrode for hydrogen evolution by alkaline electrolysis of water

A technology of electrolysis of water and hydrogen evolution, applied in the direction of electrodes, electrolysis components, electrolysis process, etc., can solve the problems of toxicity, flammability, and unsuitability for industrial production, and achieve high HER activity, good uniformity, and the effect of inhibiting electrolysis

Pending Publication Date: 2022-04-05
QINGDAO CHUANGQI XINNENG CATALYSIS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Phosphorus-doped electrodes are traditionally prepared using pH 3 Phosphating as a phosphorus source, but the pH 3 It is toxic and flammable at high temperature (above 38°C), not suitable for industrial production

Method used

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  • Preparation method of NiMoP electrode for hydrogen evolution by alkaline electrolysis of water
  • Preparation method of NiMoP electrode for hydrogen evolution by alkaline electrolysis of water
  • Preparation method of NiMoP electrode for hydrogen evolution by alkaline electrolysis of water

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Embodiment 1

[0039] A preparation method for a NiMoP electrode for hydrogen evolution in alkaline electrolysis of water, comprising the following steps:

[0040] (1) Foam nickel (NF) is placed in 25wt% sulfuric acid solution, at 5mA / cm 2 Electrochemical corrosion was carried out for 5 minutes under the current density to obtain foamed nickel after electrochemical corrosion.

[0041] (2) NiMoP mixed solution was prepared by using ammonium molybdate, nickel sulfate and sodium hypophosphite. The concentration of ammonium molybdate in the mixed solution was 0.07M (mol / L), the concentration of nickel sulfate was 0.28M, and the concentration of sodium hypophosphite was 0.28 M. Then sodium citrate was added to the mixed solution, and the pH of the solution was adjusted to 9 with 6M NaOH to obtain an electroplating solution. The concentration of sodium citrate in the plating solution is 0.3M.

[0042] (3) Move the electroplating solution prepared in step (2) into the electroplating tank, flow a...

Embodiment 2

[0045] A preparation method for a NiMoP electrode for hydrogen evolution in alkaline electrolysis of water, comprising the following steps:

[0046] (1) Foam nickel is placed in 25wt% sulfuric acid solution, at 5mA / cm 2 Electrochemical corrosion was carried out for 5 minutes under the current density to obtain foamed nickel after electrochemical corrosion.

[0047](2) NiMoP mixed solution was prepared by using ammonium molybdate, nickel sulfate and sodium hypophosphite. The concentration of ammonium molybdate in the mixed solution was 0.07M, the concentration of nickel sulfate was 0.28M, and the concentration of sodium hypophosphite was 0.28M. Boric acid and ammonium chloride are added to the mixed solution, and the pH of the solution is adjusted to 9 with ammonia water to obtain an electroplating solution. The concentration of boric acid in the electroplating solution is 0.4M, and the concentration of ammonium chloride is 0.3M.

[0048] (3) Move the electroplating solution ...

Embodiment 3

[0051] A preparation method for a NiMoP electrode for hydrogen evolution in alkaline electrolysis of water, comprising the following steps:

[0052] (1) Foam nickel is placed in 25wt% sulfuric acid solution, at 5mA / cm 2 Electrochemical corrosion was carried out for 5 minutes under the current density to obtain foamed nickel after electrochemical corrosion.

[0053] (2) Prepare a NiMoP mixed solution by using 0.07M ammonium molybdate, 0.28M nickel sulfate and 0.28M sodium hypophosphite, then add 0.4M sodium acetate to the solution, and adjust the pH to 10 with ammonia water to obtain an electroplating solution.

[0054] (3) Move the electroplating solution prepared in step (2) to the electroplating tank, flow a hydrogen-rich atmosphere at the bottom, and use foamed nickel as the anode at 40°C, and the foamed nickel after electrochemical corrosion in step (1) as the cathode Conduct electrodeposition with a current density of 0.1A / cm 2 , The electrodeposition time is 70min.

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Abstract

The invention discloses a preparation method of a NiMoP electrode for hydrogen evolution by alkaline electrolysis of water, which comprises the following steps: (1) placing foamed nickel in a strong acid solution for electrochemical corrosion, then taking out the foamed nickel, and cleaning the foamed nickel with ethanol and deionized water in sequence to obtain the foamed nickel after electrochemical corrosion; (2) selecting a nickel salt, a molybdenum salt and a phosphor salt to prepare a NiMoP mixed solution, then adding a buffer agent, and then adjusting the pH value of the solution to 9-10 by using an inorganic base to obtain an electroplating solution; (3) transferring the electroplating solution prepared in the step (2) into an electroplating bath, and carrying out electro-deposition in a hydrogen-rich atmosphere by taking foamed nickel as an anode and taking the foamed nickel subjected to electrochemical corrosion as a cathode; and (4) after the electro-deposition reaction is finished, cleaning the electrode with deionized water, and performing vacuum drying at room temperature to obtain the NiMoP / NF hydrogen evolution electrode. The finally prepared NiMoP / NF hydrogen evolution electrode has excellent HER performance, and has long-time stability in a three-electrode system and a simulated industrial electrolytic cell.

Description

technical field [0001] The invention relates to the field of preparation of an alkaline electrolytic water hydrogen evolution electrode, in particular to a preparation method of a NiMoP electrode for alkaline electrolytic water hydrogen evolution. Background technique [0002] At present, the types of hydrogen evolution electrodes for alkaline electrolysis water and the current status of their preparation technologies are roughly as follows: [0003] 1. Noble metal hydrogen evolution electrode [0004] Platinum group noble metal materials (Ru, Rh, Pd, Ir, Pt) have high hydrogen evolution catalytic activity, acid and alkali resistance and stability, but the cost of noble metal materials is too high, and resource reserves are limited, so they cannot be used in industrial production applications Mass promotion. [0005] 2. Hydrothermal synthesis preparation technology [0006] The hydrothermal synthesis method uses an aqueous solution as the reaction medium in an autoclave, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/061C25B11/075C25B1/04
CPCY02E60/36
Inventor 梁鑫张傑赵宏曹现霞
Owner QINGDAO CHUANGQI XINNENG CATALYSIS TECH CO LTD
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