A kind of 3D structure composite hydrogen evolution electrode and preparation method thereof

A hydrogen evolution electrode and composite electrode technology, applied in the direction of electrodes, electrolysis components, electrolysis process, etc., to achieve the effect of high specific surface area, simple operation process, and excellent electrocatalytic hydrogen evolution performance

Inactive Publication Date: 2021-03-30
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is still a great challenge to develop a facile method to prepare hydrogen evolution electrocatalysts with unique structure and high performance.

Method used

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  • A kind of 3D structure composite hydrogen evolution electrode and preparation method thereof
  • A kind of 3D structure composite hydrogen evolution electrode and preparation method thereof
  • A kind of 3D structure composite hydrogen evolution electrode and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing a composite hydrogen evolution electrode with a 3D structure, the specific steps are:

[0039] (1) Pretreatment of substrate

[0040]Before the hydrothermal reaction, immerse the foamed nickel substrate in a container filled with deionized water, and ultrasonically treat it for 5 minutes; then put the foamed nickel in 6M HCl solution for 30 seconds to remove oxides on the surface, and then use absolute ethanol, Wash with ionized water until neutral, and dry for later use;

[0041] (2) Preparation of graphene oxide dispersion

[0042] Prepare graphite oxide by the improved Hummers method, add 200mg graphite oxide to 100mL deionized water, and ultrasonically disperse with 300W ultrasonic power for 1h to obtain a tan graphene oxide dispersion with a concentration of 2mg mL -1 .

[0043] (3)Co 3 o 4 Preparation of @Ni Nano Forest

[0044] Dissolve 2.5mmol of cobalt nitrate and 12.5mmol of urea in 50mL of deionized water and stir for 30min until ...

Embodiment 2

[0055] (1) Pretreatment of substrate

[0056] Before the hydrothermal reaction, immerse the foamed nickel substrate in a container filled with deionized water, and ultrasonically treat it for 5 minutes; then put the foamed nickel in 6M HCl solution for 30 seconds to remove oxides on the surface, and then use absolute ethanol, Wash with ionized water until neutral, and dry for later use;

[0057] (2) Preparation of graphene oxide dispersion

[0058] Prepare graphite oxide by the improved Hummers method, add 150mg graphite oxide to 100mL deionized water, and ultrasonically disperse with 300W ultrasonic power for 1h to obtain a tan graphene oxide dispersion with a concentration of 1.5mg mL -1 .

[0059] (3)Co 3 o 4 Preparation of @Ni Nano Forest

[0060] Dissolve 2.5mmol of cobalt nitrate and 12.5mmol of urea in 50mL of deionized water and stir for 30min until completely dissolved, then pour it into a hydrothermal kettle, then place the nickel foam (6cm×2cm× 0.1cm) into the...

Embodiment 3

[0067] (1) Pretreatment of substrate

[0068] Before the hydrothermal reaction, immerse the foamed nickel substrate in a container filled with deionized water, and ultrasonically treat it for 5 minutes; then put the foamed nickel in 6M HCl solution for 30 seconds to remove oxides on the surface, and then use absolute ethanol, Wash with ionized water until neutral, and dry for later use;

[0069] (2) Preparation of graphene oxide dispersion

[0070] Prepare graphite oxide by the improved Hummers method, add 100mg graphite oxide to 100mL deionized water, ultrasonically disperse with 300W ultrasonic power for 1h, and obtain a tan graphene oxide dispersion with a concentration of 1.0mg mL -1 .

[0071] (3)Co 3 o 4 Preparation of @Ni Nano Forest

[0072] Dissolve 2.5mmol of cobalt nitrate and 12.5mmol of urea in 50mL of deionized water and stir for 30min until completely dissolved, then pour it into a hydrothermal kettle, then place the nickel foam (6cm×2cm× 0.1cm) into the sol...

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Abstract

The invention provides a 3D-structured composite hydrogen-evolving electrode and a preparation method thereof. The preparation method comprises dissolving cobalt chloride, sodium tungstate and graphene oxide dispersion in deionized water, ultrasonically dispersing, pouring into a hydrothermal kettle, adding foam nickel which grows Co3O4, carrying out hydrothermal reaction to obtain foam nickel loaded with RGO / CoWO4 / Co3O4; removing the foam nickel loaded with RGO / CoWO4 / Co3O4 from the hydrothermal kettle, washing, and drying to obtain the 3D-structured composite hydrogen-evolving electrode. The3D-structured composite hydrogen-evolving electrode has large specific surface area, high conductivity, good electrocatalytic hydrogen-evolving effect, good cycle performance, good environmental friendliness and other advantages.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrocatalytic hydrogen evolution composite materials, and in particular relates to a RGO / CoWO for electrocatalytic hydrogen evolution 4 / Co 3 o 4 @Ni composite material and preparation method. Background technique [0002] Energy is the engine that promotes social development and progress, and the continuous progress of human society requires a large amount of energy consumption. So far, although many different forms of energy have been developed and utilized by human beings, traditional fossil energy is still the foundation of the world's economic development. However, traditional fossil energy, including coal, oil and natural gas, is non-renewable. With continuous exploitation and utilization, its reserves are getting less and less, and the development cost is getting higher and higher. In addition, the combustion of these fossil energy sources has also brought about problems such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/031C25B11/061C25B11/091B82Y30/00B82Y40/00
CPCY02E60/36
Inventor 徐小威刘英赵玉莲黄志雄赵呈贾润萍
Owner SHANGHAI INST OF TECH
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