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High-stability alkaline solution hydrogen evolution electrocatalyst as well as preparation method and application thereof

An alkaline solution, electrocatalyst technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problem of catalyst stability attenuation and other problems, and achieve high controllability, excellent catalytic activity and stability, and rich active sites. Effect

Active Publication Date: 2022-04-26
ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the long-term reaction process, these metal oxide active sites will still be hydrogenated and reduced with the transfer of hydrogen atoms and interfacial charges, leading to the attenuation of the stability of the catalyst.
Therefore, it is still a great challenge to prepare cheap, efficient and highly stable basic hydrogen evolution electrocatalysts.

Method used

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  • High-stability alkaline solution hydrogen evolution electrocatalyst as well as preparation method and application thereof
  • High-stability alkaline solution hydrogen evolution electrocatalyst as well as preparation method and application thereof
  • High-stability alkaline solution hydrogen evolution electrocatalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0023] This embodiment provides a Cu / NiFe(OH) x Composite electrocatalyst, it is prepared by the following steps;

[0024] (a) ultrasonically clean the nickel sheet in 1M HCl, absolute ethanol, and deionized water for 30 minutes, and then dry it at 60°C for later use;

[0025] (b) Weigh raw material copper sulfate pentahydrate (CuSO 4 ·5H 2 O) 0.60mmol, iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) 0.40 mmol was dissolved in 50 mL of deionized water, and then 8 mmol of ammonia water was weighed and added to the mixed solution, and ultrasonically dispersed for 15 minutes to obtain a light green mixed solution.

[0026] (c) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, add the cleaned foamed nickel obtained in step (a), and put the above hydrothermal reaction kettle into a blast drying oven, and heat it at 100°C. After reacting under conditions for 6 hours, naturally cool the reactor to room temperature;

[0027] (d) The electr...

Embodiment 2

[0031] This embodiment provides a Cu / NiFe(OH) x Composite electrocatalyst, it is prepared by the following steps;

[0032] (a) ultrasonically clean the nickel sheet in 1M HCl, absolute ethanol, and deionized water for 30 minutes, and then dry it at 60°C for later use;

[0033] (b) Weigh raw material copper sulfate pentahydrate (CuSO 4 ·5H 2 O) 1.5mmol, iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) 0.5 mmol was dissolved in 50 mL of deionized water, and then 20 mmol of potassium hydroxide (KOH) was weighed and added into the mixed solution, and ultrasonically dispersed for 15 minutes to obtain a light green mixed solution.

[0034] (c) Pour the above-mentioned mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, add the cleaned foamed nickel obtained in step (a), and put the above-mentioned hydrothermal reaction kettle into a blast drying oven, and heat it at 150°C. After reacting under condition for 12 hours, naturally cool down the reactor to room t...

Embodiment 3

[0038] This embodiment provides a Cu / NiFe(OH) x Composite electrocatalyst, it is prepared by the following steps;

[0039] (a) ultrasonically clean the nickel foam in 1M HCl, absolute ethanol, and deionized water for 30 minutes, and then dry it at 60°C for later use;

[0040] (b) Weigh the raw material copper chloride dihydrate (CuCl 2H 2 O) 0.75mmol, ferric chloride hexahydrate (FeCl 6H 2 O) 0.5mmol was dissolved in 50mL deionized water, then weighed 20mmol urea (CH 4 N 2 O) added to the mixed solution, and ultrasonically dispersed for 15 minutes to obtain a light green mixed solution.

[0041] (c) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, add the cleaned foamed nickel obtained in step (a), and put the above hydrothermal reaction kettle into a blast drying oven, and heat it at 120°C. After reacting under condition for 24 hours, naturally cool down the reactor to room temperature;

[0042] (d) The electrocatalyst obtained ...

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Abstract

The invention provides a high-stability alkaline solution hydrogen evolution electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a copper salt, an iron salt and an alkali source in a solvent, and carrying out ultrasonic dispersion to obtain a solution; adding a substrate into the solution, reacting at 80-250 DEG C for 6-24 hours, and naturally cooling to room temperature; and washing and drying to obtain the Cu / NiFe (OH) x film. The catalyst prepared by the preparation method shows excellent catalytic activity and stability in alkaline hydrogen evolution reaction. In addition, the preparation method disclosed by the invention is simple, convenient, feasible, cheap, efficient, high in controllability, good in repeatability and suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a catalyst for electrolyzing water to produce hydrogen, and belongs to the technical field of electrocatalyst preparation. Background technique [0002] With the increasing energy crisis and environmental pollution caused by fossil fuels, the development and utilization of various clean and renewable energy sources has attracted widespread attention. As a secondary energy source, hydrogen is regarded as the most ideal energy carrier due to its clean, non-polluting, high-efficiency, storable and transportable advantages. Among them, hydrogen production by electrolysis of water has the advantages of high product purity, no pollution, and rich materials, and is considered an important part of modern clean energy technology. However, there are problems of high energy consumption and low electrolysis efficiency in the electrolysis process, which limit the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/054C25B11/061C25B11/091
CPCC25B1/04C25B11/091C25B11/054C25B11/061Y02E60/36
Inventor 尚光明乔玮苏韧
Owner ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV