CN108193225B - Membrane electrode configuration CO2Electroreduction electrolytic cell - Google Patents
Membrane electrode configuration CO2Electroreduction electrolytic cell Download PDFInfo
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- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
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- C—CHEMISTRY; METALLURGY
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Abstract
The invention discloses an electrolytic cell for electrocatalytic reduction of carbon dioxide. Comprises a cathode component, an anode component and a diaphragm for dividing the cathode component and the anode component. In the anode assembly, an anode end plate, an anode current collecting plate, an anode fluid distribution plate, an anode flow field plate and an anode electrode plate are sequentially connected; in the cathode assembly, an electrolyte supporting layer, a solution electrode plate, a cathode gas diffusion electrode, a cathode flow field plate, a cathode fluid distribution plate, a cathode collector plate and a cathode end plate are connected in sequence. The electrolytic cell can reduce CO by changing the thickness of the solution electrode plate2The amount of electrolyte used for electroreduction; meanwhile, the electrolytic cell is provided with a feeding hole and a discharging hole for electrolyte flow, the electrolyte can be continuously or intermittently updated, the electrolyte concentration is adjustable, and the stability of long-time operation of carbon dioxide electroreduction is improved. The membrane electrode configuration electrolytic cell designed by the invention has the advantages of controllable operation pressure and reaction temperature and can realize CO on a large scale2Conversion and the like, and has wider application prospect.
Description
Technical Field
The invention belongs to the technical field of carbon dioxide electrochemistry, and relates to membrane electrode configuration CO2An electroreduction cell.
Background
Currently, the global energy consumption structure of society still depends on petroleum, natural gas, coal, wood and other stone resources generally, and with the development of global economy and the increasing energy demand, the overuse of fossil fuels inevitably brings some harmful compounds to the environment on which we live, mainly including nitrogen oxides, sulfur oxides, radioactive compounds, heavy metals, volatile organic compounds, carbon dioxide and the like. The large amount of carbon dioxide emitted is a major factor causing the greenhouse effect at present. For this reason, the problem of excessive emission of carbon dioxide, CO, is circumvented2Has become a related technology of capture, absorption and conversionThe focus of current research. Wherein, CO2The electrocatalytic conversion technology has the advantages of simple system structure, environmental friendliness, mild reaction conditions and the like, and thus the electrocatalytic conversion technology is widely concerned.
CO2Can be reduced to generate CO and CH under the action of an electric field4、C2H4Gas phase products and liquid phase products such as formic acid, ethanol and the like. Currently, the patented technology focuses primarily on the design of electrocatalysts. Patent CN 104846393A discloses a method for realizing CO on the surface of a working electrode containing Ag2The electrochemical reduction method comprises the following specific steps: firstly, preparing electrolyte by using ionic liquid and ultrapure water mixed solution, using a metal Ag electrode as a working electrode, and carrying out CO (carbon monoxide) treatment2The faradaic efficiency of the product CO can reach 90 percent through electrochemical reduction. CN 104959135A provides a preparation technology of nano zinc catalyst and CO realization based on the catalyst2A method for preparing CO by electroreduction. The method comprises the following specific steps: the nano zinc catalyst is constructed by the electrodeposition technology and CO is reduced under constant potential2The control potential range is-1.4 to-1.8V, and the current efficiency of the reduction product CO is up to 93 percent.
Surrounding CO compared to the attention of the cathode side catalyst2Few reports have been made on the design of novel electroreduction cells. In general, laboratories use an H-type electrolytic cell as a reactor for the electro-reduction of carbon dioxide, comprising an anode compartment, a cathode compartment and a proton exchange membrane separating the two, the proton exchange membrane being used to reduce the diffusion of reactants and products between the anode and cathode compartments. Chinese patent CN 204097577a, for example, discloses an electrolytic cell for electrochemical reduction of carbon dioxide. The electrolytic cell comprises an anode chamber, a cathode chamber and a gas-liquid separator, wherein the anode chamber can be divided into an upper cavity and a lower cavity, the lower cavity is a container with an opening at the upper end, the upper cavity is arranged above the lower cavity, first flange plates are arranged at the opening ends of the two cavities, and the two cavities are connected through the first flange plates; the working electrode is positioned between the first flange plates at the open ends of the upper cavity and the lower cavity. However, the electrolytic cell has the defects of high cell voltage, low effective concentration of liquid-phase products and the like in the application process.
Surrounding CO2ElectroreductionThe design of the electrolytic cell is based on a Solid Oxide Fuel Cell (SOFC), Jensen and the like, and proposes a design scheme of the Solid Oxide Electrolytic Cell (SOEC) under high-temperature operation conditions (500-. Under the high-temperature operation condition, the electrolytic cell can effectively reduce CO2Electroreduction to CO or H2In (g). However, SOEC has been restricted from further development due to carbon deposition during long-term operation and electrode poisoning by volatiles (t. -j. huang, Electro chem. commun,11,1464 (2009)). Further, attention is paid to the design of electrolyzers based on the membrane electrode configuration of Proton Exchange Membrane Fuel Cells (PEMFCs), aiming at the scale-up of CO2Low temperature transformation of (2). Early research work was through
Deposition of copper on 117 film for CO conversion using Proton Exchange Membrane Fuel Cell (PEMFCs) architecture2Direct conversion to fuel (r.l. cook, j.electrochem. soc,137,187 (1990)). And recent research efforts have been directed to the introduction of a pH buffer layer (KHCO) between the cathode catalyst layer and the proton exchange membrane3Aqueous solution) to achieve CO condensation at room temperature2Conversion to CO and H2(c.delacourt, j.electrochem. soc.,155, B42 (2008)). However, the above-mentioned membrane electrode configuration electrolytic cells all suffer from the disadvantage of poor stability of the process during long-term operation, limiting CO2The industrialization process of electrocatalytic reduction.
In the above for CO2In the structural design process of the electroreduction electrolytic cell, the electrolytic cell with the membrane electrode configuration is easy to modularize and can realize CO on a large scale2The advantages of electrocatalytic conversion and great application potential. However, no relevant patent currently reports structural details of membrane electrode configuration cells.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a membrane electrode configuration CO2And (4) reducing the electrolytic cell. The electrolytic cell not only has the advantages of controllable operating pressure, controllable reaction temperature, flowable electrolyte and capability of realizing CO on a large scale2Conversion, etc., and has the function of eliminating electricityReversible decay during extremely stable operation, maintenance of CO2The electrocatalytic reduction has the function of stability and has a relatively high application prospect.
The technical scheme of the invention is as follows:
an electrolytic cell for electrocatalytic reduction of carbon dioxide comprising a cathode assembly, an anode assembly and a membrane separating the two; the anode assembly is an anode end plate, an anode current collecting plate, an anode fluid distribution plate, an anode flow field plate and an anode electrode plate which are sequentially attached and connected; the cathode assembly is an electrolyte supporting layer, a solution electrode plate, a cathode gas diffusion electrode, a cathode flow field plate, a cathode fluid distribution plate, a cathode current collecting plate and a cathode end plate which are sequentially attached and connected; the diaphragm is arranged between an anode electrode plate of the anode assembly and an electrolyte supporting layer of the cathode assembly; the anode end plate and the cathode end plate are assembled and fixed through the connecting holes and the bolts, so that the cathode assembly and the anode assembly are fixed; the electrolyte supporting layer is embedded into the groove of the solution electrode plate and forms a place for carbon dioxide electrochemical reaction with a cathode gas diffusion electrode embedded into the cathode flow field plate; the thickness of the solution electrode plate is 2 mm-5 mm; the electrolyte supporting layer is one of an asbestos film, quartz wool or wool felt.
Furthermore, the cathode inlet and outlet holes are respectively arranged on diagonal positions of the cathode end plate, the cathode fluid distribution plate, the solution electrode plate and the cathode flow field plate; electrolyte inlet and outlet holes and cathode inlet and outlet holes are arranged in a staggered manner and are respectively arranged on diagonal positions of a cathode end plate, a cathode fluid distribution plate, a solution electrode plate and a cathode flow field plate; the anode inlet and outlet holes are respectively arranged on diagonal positions of the anode end plate, the anode fluid distribution plate and the anode flow field plate; when the parts are assembled together, the inlet and outlet holes on the adjacent parts correspond to each other to form inlet and outlet channels of the cathode and the anode and inlet and outlet channels of the electrolyte.
An electrolyte mass transfer channel sequentially communicating the cathode end plate, the cathode fluid distribution plate and the cathode flow field plate to the electrolyte support layer, and respectively communicating with the electrolyte cavity of the solution electrode plate as cathode CO2Electrocatalytic reduction reaction electrolyte supplyA delivery channel; a cathode mass transfer channel sequentially communicating the cathode end plate, the cathode fluid distribution plate, and the cathode flow field plate to the cathode gas diffusion electrode for supplying cathode reactant (CO)2Gas) and collecting the product; and the anode mass transfer channel is communicated with the anode end plate, the anode fluid distribution plate and the anode flow field plate to the anode electrode plate in sequence so as to supply anode reactants and collect products.
The mass transfer channel is composed of the feed channel and the discharge channel which are communicated with each other.
Furthermore, positioning holes are respectively arranged on the cathode flow field plate, the solution electrode plate and the anode flow field plate, and when the cathode flow field plate, the solution electrode plate and the anode flow field plate are assembled together, the positioning holes correspond to each other so as to realize the fixation between adjacent components through positioning shafts; and the temperature measuring holes are arranged on the peripheral walls of the cathode flow field plate and the anode flow field plate and extend to the insides of the cathode flow field plate and the anode flow field plate, and thermocouples are placed in the temperature measuring holes to monitor the temperature in the reaction tanks arranged in the middle of the cathode flow field plate and the anode flow field plate.
Further, the separator is an ion exchange membrane.
Compared with the prior art, the invention has the following beneficial effects: by changing the thickness of the solution electrode plate, CO can be modulated2The amount of electrolyte used for electroreduction and the ionic resistance between the cathode and the anode; meanwhile, the electrolytic cell is provided with a feed inlet and a discharge outlet for flowing of the liquid electrolyte, so that the electrolyte can be continuously or intermittently updated, and the stability of long-time operation of carbon dioxide electroreduction can be improved.
Drawings
FIG. 1 is a schematic view showing an assembled structure of an electrolytic cell for electrically reducing carbon dioxide according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the front side structure of a cathode flow field plate in an embodiment of the invention;
FIG. 3 is a schematic view of the reverse structure of a cathode flow field plate in an embodiment of the invention
FIG. 4(a) is a schematic front view of a solution electrode plate according to an embodiment of the present invention; (b) a schematic view of a feed bridge structure;
FIG. 5 is a schematic diagram of a reverse structure of a solution electrode plate according to an embodiment of the present invention;
FIG. 6 shows an embodiment of the present invention in which an electrolytic cell is configured as a membrane electrode for CO2Electrocatalytic reduction of target reduction products CO and H2The change trend of the Faraday efficiency with the current density: (a) CO; (b) h2。
FIG. 7 shows an embodiment of the present invention in which an electrolytic cell is configured as a membrane electrode for CO2Electrocatalytic reduction: thickness of solution electrode plate to CO2Influence of the electroreduction polarization curves (scan rate 10mV/s)
FIG. 8 is an electrolytic cell in membrane electrode configuration for CO in an embodiment of the present invention2Electrocatalytic reduction: concentration of potassium bicarbonate to CO2The effect of the electroreduction polarization curve (scan rate 10 mV/s);
FIG. 9 shows an embodiment of the present invention in which an electrolytic cell is configured as a membrane electrode for CO2Electrocatalytic reduction of target reduction products CO and H2The change trend of Faraday efficiency along with the concentration of potassium bicarbonate; (a) CO; (b) h2。
In the figure: 1 an anode end plate; 2 an anode current collecting plate; 3 an anode fluid distribution plate; 4 an anode flow field plate; 5 an anode electrode plate; 6, a Nafion membrane; 7 an electrolyte support layer; 8 solution electrode plate; 9 a cathode gas diffusion electrode; 10 a cathode flow field plate; 11 a cathode fluid distribution plate; 12 a cathode collector plate; 13 a cathode end plate; 14 feed inlet bolts; 15 discharge port bolts; 2-0 cathode flow field plate first electrode surface; 2-1 sealing gasket; 2-2 feed inlets; 2-3, discharging; 2-4 discharge ports; 2-5 grooves; 3-0 cathode flow field plate second electrode surface; 3-1 temperature measuring hole; 3-2 flow field; 3-3 cathode reaction tank; a 4-0 solution electrode plate first insulating surface; 4-1 electrolyte chamber; 4-2 feeding and discharging grooves; 4-3 feed bridge; 5-0 solution electrode plate second insulating surface.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: design and assembly method of membrane electrode configuration electrolytic cell structure
This example provides an electrolytic cell for the electroreduction of carbon dioxide, as shown in fig. 1, comprising a cathode assembly, an anode assembly and a diaphragm dividing the cathode assembly and the anode assembly, wherein the diaphragm is specifically an ion exchange membrane, more specifically a perfluorosulfonic acid proton exchange membrane (trade name:
a film); the cathode assembly comprises a cathode gas diffusion electrode 9, an electrolyte support layer 7, a solution electrode plate 8, a cathode flow field plate 10, a cathode fluid distribution plate 11, a cathode current collector plate 12 and a cathode end plate 13 with opposing positions; the anode assembly comprises an anode electrode plate 5, an anode fluid distribution plate 3, an anode flow field plate 4, an anode current collecting plate 2 and an anode end plate 1 which are oppositely arranged, wherein the fluid flow field plate is made of conductive metal, such as copper, stainless steel, a titanium plate and a graphite plate; or a support with a conductive metal plating of a metal such as platinum, gold. The fluid distribution plate is made of an electrically conductive material, such as copper, stainless steel, or graphite. The end plate is made of conductive metal and is used for fixing and supporting the electrolytic cell system; the current collecting plate is positioned between the end plate and the fluid distribution plate and is used for uniformly distributing current in the electrolytic cell stack system; the fluid distribution plate is arranged between the current collecting plate and the flow field plate and is used for distributing the cathode and anode flows in the electric pile system; the anode flow field plate 4 and the cathode flow field plate 10 can be of a cavity structure or a flow field structure with flow guide channels, and provide flow guide channels for reactants, electrolyte and products for solid electrolyte membrane electrodes between the anode flow field plate and the cathode flow field plate; the cathode end plate 13 is provided with threaded holes which correspond to the feed inlet 2-2 and the discharge outlet 2-3 one by one and are used for installing a tube plate joint so as to supply cathode reactants and collect reduction gas phase products;
a cathode flow field plate 10 is shown in fig. 2 and 3, wherein a cathode reaction channel 3-3 is provided on the second electrode surface 3-0 of the cathode flow field plate. The surface of the first electrode surface 2-0 of the cathode flow field plate is provided with a plurality of grooves 2-5, one end of each groove is communicated with the cathode reaction groove, and the opposite end of each groove is communicated with the mass transfer channel, so that reactants flow into the flow field from the mass transfer channel and products flow into the mass transfer channel from the flow field.
The solution electrode plate 8, as shown in fig. 4 and 5, is provided with an electrolyte chamber 4-1 extending therethrough and having first and second oppositely disposed open ends, the first open end being in sealed communication with the cathode flow field plate 10. The electrolyte supporting layer 7 is tightly matched with an electrolyte cavity 4-1 in the solution electrode plate 8, and a reaction interface is constructed between the electrolyte supporting layer and a cathode gas diffusion electrode to provide a place for a carbon dioxide electrochemical reaction; the electrolyte supporting layer 7 is stored with a saturated CO2Or the electrolyte and CO2A two-phase flow solution of (a); a diaphragm is arranged between the solution electrode plate 8 and the anode flow field plate 4.
In order to realize the update of the electrolyte in the solution electrode plate cavity, the solution electrode plate 8 further comprises a plurality of material inlet and outlet grooves 4-2 which are arranged on the side surface of the first insulating surface 4-0 of the solution electrode plate 8 in parallel, wherein one end of each material inlet and outlet groove 4-2 is communicated with the electrolyte cavity 4-1, and the opposite end is communicated with the mass transfer channel, so that reactants flow into the electrolyte cavity 4-1 from the mass transfer channel and products flow into the mass transfer channel from the electrolyte cavity 4-1. The surface of which is sealed to the upper surface by feed bridges 4-3 (see fig. 4).
Example 2: application of the membrane electrode configuration electrolytic cell: effect of current density on carbon dioxide electro-reduction performance in order to verify the uniquely configured electrolytic cell of the present invention for electro-reduction of carbon dioxide. In CO2During the structural design process of the electroreduction electrolytic cell, CO is simultaneously carried out by adjusting the current density2Electrochemical characterization and analysis of the reduction products of electrocatalytic reduction, in which the working electrode in the cell of example 1 above was composed of a monoatomic Ni-N-C gas diffusion electrode (effective area 25 cm)2) The iridium oxide/titanium electrode and the potassium bicarbonate water solution are respectively used as a counter electrode and an electrolyte solution. The invention is to CO in the running process of the electrolytic cell2And carrying out online real-time detection on the gas-phase reduction product. Wherein the on-line detection utilizes a gas chromatograph (7890B, Agilent instrument) to perform full-scale gas product analysis, wherein the gas phase composition of the reduction product is CO and H2. FIG. 6 shows current density vs. electrolytic cell carbon dioxide electroreductionInfluence of material distribution, wherein the system operating temperature is 25 ℃, the potassium bicarbonate concentration is 0.5mol/L, and the working current density is 0.8-10 mA/cm2. As can be seen from FIGS. 6(a) and (b), when the reduction current density was 0.8mA/cm2When CO and H are present in the reduction product2The faradaic efficiencies of (a) are 11.462% and 27.672%, respectively; further improving the reduction current density to be 6mA/cm2Reduction of CO and H in the product2The faradaic efficiencies of (a) are 79.316% and 8.562%, respectively; further improving the reduction current density to 10mA/cm2When CO and H are present in the reduction product2The faradaic efficiencies of (a) were 86.840% and 5.723%, respectively.
Example 3: application of the membrane electrode configuration electrolytic cell: influence of thickness of solution electrode plate on electroreduction performance of carbon dioxide
To demonstrate the unique configuration of the electrolytic cell for the electroreduction of carbon dioxide of the present invention. In CO2In the structural design process of the electroreduction electrolytic cell, the thickness of the solution electrode plate can be adjusted to adjust CO2And electrically reducing the size of the ionic resistance. This example examines CO at 2mm and 5mm thickness of the solution electrode plate, respectively2Electrochemical behavior of electrocatalytic reduction. Wherein the cell composition was in accordance with example 2. FIG. 7 shows the effect of the thickness of the solution electrode plate on the electroreduction performance of the carbon dioxide in the electrolytic cell, wherein the system operating temperature is 25 ℃, the concentration of potassium bicarbonate is 0.5mol/L, and the working potential is-1V to-10V. As is apparent from FIG. 7, when the thickness of the solution electrode plate is 2mm and the working potential is-1V, the current density of the system operation is 0.605mA/cm2When the reduction potential reaches-10.5V, the reduction current density of the system reaches-57.957 mA/cm2(ii) a When the thickness of the solution electrode plate is further increased to 5mm, and when the reduction potential reaches-10.5V, the reduction current density of the system reaches-44.773 mA/cm2。
Example 4: application of the membrane electrode configuration electrolytic cell: effect of electrolyte concentration on carbon dioxide electroreduction Performance
To demonstrate the unique configuration of the electrolytic cell for the electroreduction of carbon dioxide of the present invention. In CO2In the structural design process of the electroreduction electrolytic cell, KHCO with different concentrations is selected3As a support layer for the electrolyte,by adjusting KHCO3In a concentration of (A) of (B), CO is carried out2Electrochemical characterization of the electrocatalytic reduction and analysis of the reduction products, wherein the cell composition was consistent with example 2. FIG. 8 is a graph showing the effect of electrolyte solution concentration on the electroreduction performance of carbon dioxide in an electrolytic cell, wherein the system operating temperature is 25 ℃ and KHCO is3The concentration is 0.1-0.6 mol/L, and the working voltage is-1V-10.5V. As can be seen from FIG. 8, when the potassium bicarbonate concentration is 0.1mol/L and the working potential is-1V, the current density of the system operation is 0.3056mA/cm2(ii) a When the reduction potential reaches-10.5V, the reduction current density of the system reaches-7.106 mA/cm2(ii) a When the concentration of the potassium bicarbonate is further increased to 0.3mol/L and the reduction potential reaches-10.5V, the reduction current density of the system reaches-20.311 mA/cm2(ii) a When the concentration of the potassium bicarbonate is further increased to 0.6mol/L, when the reduction potential reaches-10.5V, the reduction current density of the system reaches-58.516 mA/cm2。
The present invention is directed to CO2Electroreduction gas phase products are also characterized, wherein the reduction products are CO and H2The current density is 0.8-6 mA/cm2The system operating temperature is 25 ℃ and the concentration of the potassium bicarbonate is 0.1-0.6 mol/L. As shown in FIGS. 9(a) and (b), it can be seen that the current density was 0.8mA/cm when the potassium hydrogencarbonate concentration was 0.1mol/L2When is, CO and H2The Faraday efficiencies of the two electrodes are 32.266% and 26.880%, respectively, when the current density reaches 6mA/cm2CO and H2The faradaic efficiencies of (a) are 81.496% and 7.737%, respectively; when the concentration of the potassium bicarbonate is further increased to 0.3mol/L, the current density is 0.8mA/cm2CO and H2The Faraday efficiencies of the two electrodes are 22.173% and 46.153%, respectively, when the current density is 6mA/cm2CO and H2The dallas efficiency of (a) is 79.888% and 10.323%, respectively; further increasing the concentration of potassium bicarbonate to 0.6mol/L, when the current density is 0.8mA/cm2When is, CO and H2The Faraday efficiencies of the two electrodes are 15.886% and 39.910%, respectively, when the current density reaches 6mA/cm2CO and H2The faradaic efficiencies of (a) are 79.854% and 10.023%, respectively; by changing KHCO3Concentration, CO and H at the same current density2Without significant change in faraday efficiency. Only at a current density of 0.8mA/cm2When H is present2There is a significant difference in Faraday efficiency. Therefore, the invention represents the trend that the working voltage changes along with the concentration of the potassium bicarbonate in the electrolysis process, and the graph shows that the working voltage gradually decreases along with the increase of the concentration of the potassium bicarbonate, and the change rule is consistent with the data provided by the impedance.
Claims (2)
1. An electrolytic cell for electrocatalytic reduction of carbon dioxide comprising a cathode assembly, an anode assembly and a membrane separating the two; the anode assembly is an anode end plate, an anode current collecting plate, an anode fluid distribution plate, an anode flow field plate and an anode electrode plate which are sequentially attached and connected; the cathode assembly is an electrolyte supporting layer, a solution electrode plate, a cathode gas diffusion electrode, a cathode flow field plate, a cathode fluid distribution plate, a cathode current collecting plate and a cathode end plate which are sequentially attached and connected; the diaphragm is arranged between an anode electrode plate of the anode assembly and an electrolyte supporting layer of the cathode assembly; the anode end plate and the cathode end plate are assembled and fixed through the connecting holes and the bolts, so that the cathode assembly and the anode assembly are fixed; the electrolyte supporting layer is embedded into the groove of the solution electrode plate and forms a place for carbon dioxide electrochemical reaction with a cathode gas diffusion electrode embedded into the cathode flow field plate; the thickness of the solution electrode plate is 2 mm-5 mm; the electrolyte supporting layer is one of an asbestos film, quartz cotton or wool felt; the end plate is made of conductive metal; the material of the flow field plate is conductive metal or a support body with a conductive metal coating; the material of the fluid distribution plate is a conductive material; the cathode inlet and outlet holes are respectively arranged on the diagonal positions of the cathode end plate, the cathode fluid distribution plate, the solution electrode plate and the cathode flow field plate; electrolyte inlet and outlet holes and cathode inlet and outlet holes are arranged in a staggered manner and are respectively arranged on diagonal positions of a cathode end plate, a cathode fluid distribution plate, a solution electrode plate and a cathode flow field plate; the anode inlet and outlet holes are respectively arranged on diagonal positions of the anode end plate, the anode fluid distribution plate and the anode flow field plate; when the components are assembled together, the inlet and outlet holes on the adjacent components correspond to each other to form a cathode inlet channel, an anode outlet channel and an electrolyte inlet channel and an electrolyte outlet channel; the positioning holes are respectively arranged on the cathode flow field plate, the solution electrode plate and the anode flow field plate, and when the cathode flow field plate, the solution electrode plate and the anode flow field plate are assembled together, the positioning holes correspond to each other so as to realize the fixation between the adjacent components through the positioning shafts; and the temperature measuring holes are arranged on the peripheral walls of the cathode flow field plate and the anode flow field plate and extend to the insides of the cathode flow field plate and the anode flow field plate, and thermocouples are placed in the temperature measuring holes to monitor the temperature in the reaction tanks arranged in the middle of the cathode flow field plate and the anode flow field plate.
2. An electrolytic cell for the electrocatalytic reduction of carbon dioxide as recited in claim 1 wherein the membrane is an ion exchange membrane.
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| CN102912374A (en) * | 2012-10-24 | 2013-02-06 | 中国科学院大连化学物理研究所 | Electrochemical reduction CO2 electrolytic tank using bipolar membrane as diaphragm and application of electrochemical reduction CO2 electrolytic tank |
| WO2014202855A1 (en) * | 2013-06-20 | 2014-12-24 | IFP Energies Nouvelles | Method of producing formic acid |
| CN106715760A (en) * | 2014-09-08 | 2017-05-24 | 3M创新有限公司 | Ionic polymer membrane for a carbon dioxide electrolyzer |
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| CN102912374A (en) * | 2012-10-24 | 2013-02-06 | 中国科学院大连化学物理研究所 | Electrochemical reduction CO2 electrolytic tank using bipolar membrane as diaphragm and application of electrochemical reduction CO2 electrolytic tank |
| WO2014202855A1 (en) * | 2013-06-20 | 2014-12-24 | IFP Energies Nouvelles | Method of producing formic acid |
| CN106715760A (en) * | 2014-09-08 | 2017-05-24 | 3M创新有限公司 | Ionic polymer membrane for a carbon dioxide electrolyzer |
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