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Preparation method of self-supporting electrode material, self-supporting electrode material and electrolysis apparatus

A self-supporting electrode and electrode material technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of reducing the contact area between active materials and electrolyte, product conversion rate and selectivity, uneven catalyst coating, etc., to achieve The effect of accelerating electron collection and transfer rate, increasing electrode reaction rate, and improving conversion efficiency

Active Publication Date: 2018-11-23
ENN SCI & TECH DEV
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AI Technical Summary

Problems solved by technology

At present, the catalysts used for electrocatalytic reduction of carbon dioxide often have the problems of low activity, low conversion rate and poor product selectivity. Therefore, the preparation of a high-performance catalyst is of great significance for the effective utilization of carbon dioxide.
Moreover, many of the catalysts prepared at this stage need to be made by adding binders and activated carbon for slurrying to make electrodes. The contact area of ​​the liquid, and the uneven coating of the obtained catalyst will also affect the conversion rate and selectivity of the product

Method used

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  • Preparation method of self-supporting electrode material, self-supporting electrode material and electrolysis apparatus
  • Preparation method of self-supporting electrode material, self-supporting electrode material and electrolysis apparatus
  • Preparation method of self-supporting electrode material, self-supporting electrode material and electrolysis apparatus

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preparation example Construction

[0029] refer to figure 1 As shown, the embodiment of the present invention provides a method for preparing a self-supporting electrode material, including:

[0030] Step 1 S101: adding foamed copper to SnCl with a first preset concentration 4 ·5H 2 Soak in O solution;

[0031] Step 2 S102: adding the second preset concentration of SnCl 4 ·5H 2 O solution is mixed with a strong alkaline solution with a preset concentration, and a surfactant with a preset quality is added to obtain a mixed solution;

[0032] Step 3 S103: putting the soaked copper foam into the mixed solution, and performing a hydrothermal reaction to obtain a composite material;

[0033] Step 4 S104: Configuring SnCl with a preset concentration 2 2H 2 0 ethanol solution, add the composite material and soak;

[0034] Step 5 S105: at a preset temperature, put the soaked composite material into a noble metal salt solution with a preset concentration to react and obtain an electrode material.

[0035] Speci...

Embodiment 1

[0059] 1. Cut 2x3cm copper foam and ultrasonically clean it in 40ml of acetone for 10 minutes to remove the oil stains on the surface; then put it into 30ml of dilute hydrochloric acid with a mass fraction of 1% and ultrasonically clean it for 5 minutes to remove the oxides on the surface, and then use it separately Wash with deionized water and absolute ethanol three times, and finally dry in a vacuum oven at 60°C for 1 h.

[0060] 2. Take the treated foam copper in step 1 and soak it in 0mol / L SnCl 4 ·5H 2 O solution for 1 hour. Afterwards, they were washed three times with deionized water and absolute ethanol, and finally dried in a vacuum oven at 60 °C for 0 h.

[0061] 3. Take 0.8g of SnCl respectively 4 ·5H 2 O and 40ml of deionized water to make solution A, take 0.8g of NaOH and 40ml of deionized water to make solution B, under the condition of magnetic stirring, slowly add solution A to solution B, continue stirring for 10min and then add 1g CTAB, continue stirrin...

Embodiment 2

[0067] 1. Cut 2x3cm copper foam and ultrasonically clean it in 40ml of acetone for 15 minutes to remove the oil stains on the surface; then put it into 30ml of dilute hydrochloric acid with a mass fraction of 2.5% and ultrasonically clean it for 10 minutes to remove the oxide on the surface, and then use it separately Wash with deionized water and absolute ethanol three times, and finally dry in a vacuum oven at 70°C for 3 hours.

[0068] 2. Take the treated foam copper in step 1 and soak it in 0.05mol / L SnCl 4 ·5H 2 O solution for 2.5 hours. Afterwards, they were washed three times with deionized water and absolute ethanol, and finally dried in a vacuum oven at 70°C for 1 h.

[0069] 3. Take 12g of SnCl respectively 4 ·5H 2 O and 40ml of deionized water to make solution A, take 4g of NaOH and 40ml of deionized water to make solution B, under the condition of magnetic stirring, slowly add solution A to solution B, continue stirring for 10min and then add 1.48g CTAB, conti...

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Abstract

The invention provides a preparation method of a self-supporting electrode material. The preparation method comprises the steps that foamy copper is soaked in an SnCl4.5H2O solution with the first preset concentration; an SnCl4.5H2O solution with the second preset concentration is mixed with a strong alkaline solution with the preset concentration, a surface active agent of preset mass is added, and accordingly a mixed solution is obtained; the soaked foamy copper is placed into the mixed solution to be subjected to a hydrothermal reaction, and accordingly a composite material is obtained; anSnCl2.2H2O ethanol solution with the preset concentration is prepared, and the composite material is added into the solution for soaking; and under preset temperature, the soaked composite material isplaced into a precious metal salt solution with the preset concentration for a reaction, and accordingly the electrode material is obtained. A catalyst for electrocatalytic reduction of carbon dioxide is improved from the aspects of structure and morphology, the foamy copper is selected as a self-supporting framework and loaded with tin oxide and gold to be directly applied to the electrode material, the preparation process is simple and short, active sites of carbon dioxide are increased, the carbon dioxide transformation efficiency is improved, and the hydrogen evolution electric potentialis lowered.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a preparation method of a self-supporting electrode material, a self-supporting electrode material and an electrolysis device. Background technique [0002] The main advantages of electrocatalytic reduction technology are: no consumption of chemical reagents, versatility, high energy efficiency, environmental compatibility, and easy control. The key component that determines the level of electrocatalytic activity in electrochemical catalysis is the working electrode, which is a very important part of the electrochemical catalysis system. Commonly used electrodes are contaminated and passivated on the electrode surface due to the adsorption of electrocatalytic reaction products on the electrode surface, or due to physical and chemical changes on the electrode surface itself after long-term use, resulting in greatly reduced catalytic activity, catalytic reproducibility,...

Claims

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Application Information

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IPC IPC(8): C25B1/00C25B3/04C25B11/03C25B11/08C25B3/25
CPCC25B1/00C25B3/25C25B11/031C25B11/051C25B11/093
Inventor 王培侨杨林月
Owner ENN SCI & TECH DEV
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