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

A self-supporting electrode and electrode material technology, applied in the direction of electrodes, electrolytic components, electrolytic process, 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: 2020-02-18
ENN SCI & TECH DEV
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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 device
  • Preparation method of self-supporting electrode material, self-supporting electrode material and electrolysis device
  • Preparation method of self-supporting electrode material, self-supporting electrode material and electrolysis device

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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 present invention proposes a preparation method of a self-supporting electrode material, comprising: foaming copper at a first preset concentration of SnCl 4 ·5H 2 Soak in O solution; put the second preset concentration of SnCl 4 ·5H 2 O solution is mixed with a strong alkaline solution with a preset concentration, and a preset quality of surfactant is added to obtain a mixed solution; the soaked copper foam is put into the mixed solution for hydrothermal reaction to obtain a composite material; Set the concentration of SnCl 2 2H 2 O ethanol solution, adding the composite material for soaking; at a preset temperature, putting the soaked composite material into a precious metal salt solution with a preset concentration to react and obtain an electrode material. Improve the structure and morphology of the catalyst for the electrocatalytic reduction of carbon dioxide, select foam copper as a self-supporting framework, load tin oxide and gold, and directly use it as an electrode material, the production process is simple and the process is short, the active sites of carbon dioxide are increased, and the Improve the conversion efficiency of carbon dioxide and reduce the hydrogen evolution potential.

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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Patent Type & Authority Patents(China)
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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