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An electrolytic cell for electroreducing carbon dioxide

A carbon dioxide and electrolytic cell technology, which is applied in the direction of electrolytic components, electrolytic process, electrolytic organic production, etc., can solve the problems of low effective concentration of liquid phase products and high cell voltage, and achieve the effects of small volume, lower cell voltage, and reduced usage

Active Publication Date: 2019-08-27
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, what the present invention aims to solve is that the existing electrolytic cell for electroreduction of carbon dioxide has the defects of high cell voltage and low effective concentration of liquid-phase products, and further provides an electrolytic cell with low cell voltage and high effective concentration of liquid-phase products. Electrolytic cell for carbon dioxide reduction

Method used

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  • An electrolytic cell for electroreducing carbon dioxide
  • An electrolytic cell for electroreducing carbon dioxide
  • An electrolytic cell for electroreducing carbon dioxide

Examples

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Effect test

Embodiment 1

[0049] This embodiment provides an electrolytic cell for electroreducing carbon dioxide, such as figure 1 As shown, it includes a cathode assembly, an anode assembly and a diaphragm that separates the two, and the diaphragm is specifically an ion exchange membrane, more specifically a Nafion membrane; the cathode assembly includes a working electrode; the anode assembly includes a first electrode surface 3-0 that is oppositely arranged and the anode plate 3 on the second electrode surface 3-3, the material of the anode plate 3 is conductive metal, such as copper or stainless steel, and also includes,

[0050] Insulation board 1, such as figure 2 with 3 As shown, it has a first insulating surface 1-3 and a second insulating surface 1-4 that are oppositely arranged and a hollow cavity 1-1 for placing a working electrode through the two, and the surrounding wall of the insulating plate 1 is provided with a Inside, and the placement hole 1-2 connected with the hollow cavity 1-1...

Embodiment 2

[0059] This embodiment provides an electrolytic cell for electroreducing carbon dioxide. On the basis of the above-mentioned embodiment 1, as a deformable embodiment, the end of the conductive collector plug extending into the hollow cavity is in indirect contact with the conductive sheet, for example, A conductive piece is inserted into the hollow cavity, and the conductive current collecting plug and the conductive piece realize indirect contact through the conductive piece, and conduction can also be realized, and the conductive piece can be a conductive spring;

[0060] The catalytic unit is filled in the anode reaction tank 3-1, specifically, it can be a catalyst filling layer formed by filling the anode reaction tank 3-1 with catalytic materials.

Embodiment 3

[0062] This embodiment provides an electrolytic cell for electrically reducing carbon dioxide. On the basis of the above-mentioned embodiment 1 or 2, as a deformable embodiment, the insulating plug 4 is a solid insulating plug, and a wire is embedded in it, and one end of the wire is connected to the conductive Chip connection, the other end is connected to an external power supply;

[0063] As an alternative implementation, such as figure 1 Shown, feed hole 10 and feed outlet 11 are two, wherein one feed hole 10 is responsible for passing into carbon dioxide gas, and another feed hole 10 is responsible for passing into electrolyte; 10 is a diagonal discharge port 11 responsible for collecting residual carbon dioxide gas, and another discharge port 11 is responsible for collecting product, and the above-mentioned all adopt the direction of bottom-in and top-out to move fluid.

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Abstract

The invention discloses an electrolytic cell for electrically reducing carbon dioxide. The electrolytic cell is provided with an insulating plate, which has a first insulating surface and a second insulating surface opposite to each other and a hollow cavity for placing a working electrode through the two, and the peripheral wall of the insulating plate is provided with a wall extending to the inside, and is connected with The hollow cavity is connected to the placement hole, and the reference electrode is placed in the placement hole and filled with a salt bridge; an anode reaction tank is set on the first electrode surface, and a diaphragm is set between the solution electrode plate and the anode plate. The above settings effectively reduce the The distance between the working electrode and the reference electrode, the working electrode and the counter electrode reduces the cell voltage; then by setting the solution electrode plate, it is provided with a first open end and a second open end that pass through it and have oppositely arranged Electrolyte cavity, the volume of the electrolyte cavity is small, which reduces the amount of electrolyte solution used, thereby increasing the effective concentration of liquid phase products, which is conducive to the analysis and detection of CO 2 Electrochemical reduction reaction liquid phase product.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide electrochemistry, and in particular relates to an electrolytic cell for electrically reducing carbon dioxide. Background technique [0002] With the development of the global economy, the demand for energy is increasing, and the "greenhouse effect" caused by the massive combustion of fossil fuels such as oil, natural gas and coal has become the main cause of global warming. As of 2015, the world CO 2 The total emission has reached 3.53×10 10 t, where China CO 2 Emissions up to 1.03×10 10 t. How to absorb and convert CO around the problem of excessive carbon dioxide emissions 2 has become a hotspot of current research. The electrocatalytic conversion technology has attracted much attention due to its advantages of simple system structure, environmental friendliness and mild reaction conditions. This technology enables CO 2 Under the action of an electric field, it is reduced to gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B9/08C25B11/03C25B3/04C25B9/19C25B3/25
CPCC25B11/03C25B3/25C25B9/19
Inventor 杜兆龙赵波毛庆景维云黄延强刘灵惠石越刘松唐保国王强
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD