A fuel cell with no co2 emission and a method of electrodeposition manufacturing thereof

Abstract

The application relates to the technical field of fuel cells, and particularly discloses a fuel cell without CO2 emission and an electrode electrodeposition manufacturing method thereof, wherein the fuel cell is used for directly oxidizing ethanol into acetate, the fuel cell comprises an anode electrode, a cathode electrode and an ion film arranged between the anode electrode and the cathode electrode, and the anode electrode is a nickel mesh electrode with Au and Pt deposited in sequence. Based on the fuel cell composed of the Pt-Au / NM electrode, the fuel cell realizes efficient and high-selectivity production of acetate value-added chemicals and electric energy under the condition of no CO2 emission, and has good economic benefits and environmental benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fuel cell technology, in particular to a fuel cell without CO2 emission and an electrode deposition manufacturing method thereof. BACKGROUND

[0002] Carbon-based fuels, including fossil fuels and biofuels, are key primary energy sources and raw materials. However, traditional carbon-based fuels have low efficiency in power generation and produce a large amount of carbon dioxide. Although hydrogen is considered a clean energy source, it is currently mainly produced through the reforming process of fossil fuels, which not only has high energy consumption but also emits a large amount of CO2. In addition, compared with liquid carbon-based fuels, hydrogen has a lower volumetric energy density, resulting in high storage and transportation costs and safety risks. In contrast, bioethanol is considered a potential clean fuel, which has the advantages of low price, liquid state, renewability, high volumetric energy density, mature production infrastructure and industry, and easy storage and transportation. Bioethanol fuel can be produced through fermentation processes using biomass raw materials such as wood, straw, and corn. Ethanol fuel can also be produced in large quantities through catalytic hydrogenation, with CO2 and hydrogen derived from renewable energy electrolysis of water, thereby maximizing the use of energy and resources, promoting the development of low-carbon energy systems, and achieving "carbon reduction and carbon fixation". In addition, direct ethanol fuel cells (DEFCs) can directly convert ethanol fuel into electrical energy, exhibiting extremely high energy conversion efficiency.

[0003] Platinum (Pt)-based catalysts have long been considered ideal for direct ethanol fuel cell (DEFC) anode electrodes. However, the strong adsorption of platinum-based catalysts on intermediate products in the ethanol oxidation reaction leads to easy over-dehydrogenation of ethanol at the anode, which generates CO2, a greenhouse gas. Furthermore, the strong adsorption of CO intermediates formed during over-dehydrogenation on the platinum surface can cause "poisoning" of the catalyst. Therefore, the application of platinum-based catalyst anode electrodes with high stability and no CO2 emission in DEFCs is a challenging task.

[0004] On the other hand, acetate, as a key C2 industrial feedstock chemical, has multifunctionality and extensive application potential, and is widely used in the preparation of chemical products, food additives, cosmetics, pharmaceuticals, environmental protection and agriculture and other fields. However, the acetate produced in the industry at present mainly depends on fossil energy, which is synthesized by methanol carbonylation technology, which needs to use organic metal catalyst and halide promoter in high temperature and high pressure environment. This method not only consumes a lot of energy and resources, but also has the challenges of the finiteness of fossil energy, low selectivity, toxicity of raw material CO, and by-products such as CO2 and wastewater. Recently, the technology of using renewable electricity to reduce CO2 / CO to multi-carbon C2+ products has opened up a promising new way for the synthesis of sustainable fuels and chemicals, although it still needs a lot of energy consumption. In addition, photocatalytic systems, piezoelectric catalytic systems, photoelectric catalytic systems and photothermal catalytic systems have been tried to be used for catalyzing CO2 reduction to generate C2 products, but they still have deficiencies in synthesis efficiency. Therefore, it is a very challenging task to manufacture and use Pt-based anode electrocatalysts in DEFC to realize stable, efficient and high-selectivity synthesis of acetate and generation of electric energy without CO2 emission.

[0005] Therefore, the prior art still needs to be improved and developed. SUMMARY

[0006] In view of the deficiencies of the prior art described above, the purpose of the present application is to provide a fuel cell without CO2 emission and an electrode electrodeposition manufacturing method thereof, aiming to solve the problem that ethanol is easy to generate greenhouse gases such as carbon dioxide by excessive dehydrogenation on the anode of the existing fuel cell, causing catalyst poisoning and thus leading to the decline of the performance of the battery.

[0007] The technical scheme of the present application is as follows:

[0008] A fuel cell without CO2 emission, wherein the fuel cell is used for directly oxidizing ethanol to acetate, the fuel cell comprises an anode electrode, a cathode electrode and an ion membrane arranged between the anode electrode and the cathode electrode, the anode electrode is a nickel mesh electrode with Au and Pt deposited in sequence, and the preparation of the anode electrode comprises the following steps:

[0009] The nickel mesh is pickled to remove the surface oxide layer, and then ultrasonically cleaned for standby;

[0010] Then the cleaned nickel mesh is clamped and soaked in a gold electrodeposition solution, a three-electrode mode is adopted, and an electrochemical workstation is used to electrodeposition Au on the surface of the nickel mesh, and after the electrodeposition is completed, the surface residual gold electrodeposition solution is washed with deionized water;

[0011] The same electro-deposition method is adopted, the gold electro-deposition solution is replaced by platinum electro-deposition solution, the Au surface is plated with Pt by using the electrochemical workstation, after the electro-deposition, the electrode is washed by deionized water, and after drying, the nickel mesh electrode with Au and Pt deposited in sequence is obtained, and is recorded as Pt-Au / NM electrode.

[0012] The CO2 emission-free fuel cell, wherein the Au is electro-deposited on the surface of the nickel mesh by using the electrochemical workstation in a three-electrode mode, and comprises the following steps:

[0013] The gold electro-deposition solution is prepared, and the gold electro-deposition solution is composed of HAuCl4·4H2O, C6H5Na3O7 and water;

[0014] The saturated calomel electrode is used as a reference electrode, the platinum mesh electrode is used as a counter electrode, and the nickel mesh is used as a working electrode to form a three-electrode mode.

[0015] The gold is electro-deposited on the surface of the nickel mesh by using the electrochemical workstation in a constant current mode, wherein the current size is -100 to -500 mA cm -2 , and the electro-deposition time is 1000-3600 s.

[0016] The CO2 emission-free fuel cell, wherein the concentrations of the HAuCl4·4H2O and the C6H5Na3O7 are 0.2-2.0 g / L and 0.15-1.5 g / L respectively.

[0017] The CO2 emission-free fuel cell, wherein the Au surface is plated with Pt by using the electrochemical workstation, and the method comprises the following steps:

[0018] The platinum electro-deposition solution is prepared, and the platinum electro-deposition solution is composed of H2PtCl6·6H2O, C6H5Na3O7 and water;

[0019] The saturated calomel electrode is used as a reference electrode, the platinum mesh electrode is used as a counter electrode, and the nickel mesh with gold deposited on the surface is used as a working electrode to form a three-electrode mode.

[0020] The platinum is plated on the surface of the gold by using the electrochemical workstation in a constant current mode, wherein the current size is -100 to -500 mA cm -2 , and the electro-deposition time is 1000-3600 s.

[0021] The CO2 emission-free fuel cell, wherein the concentrations of the H2PtCl6·6H2O and the C6H5Na3O7 are 0.2-2.0 g / L and 0.15-1.5 g / L respectively.

[0022] The fuel cell without CO2 emission, wherein the nickel mesh is pickled to remove the surface oxidation layer, the pickling solution is hydrochloric acid, sulfuric acid or nitric acid in the standby step of ultrasonic cleaning; the concentration of the pickling solution is 1-2 mol / L; the time of ultrasonic cleaning is 5-20 min.

[0023] The fuel cell without CO2 emission, wherein the cathode electrode material is Pt / C or Pd / C.

[0024] The fuel cell without CO2 emission, wherein the ion membrane is an anion exchange membrane.

[0025] The fuel cell without CO2 emission, wherein the length of the nickel mesh is 1.5-75 cm, and the width is 1-50 cm.

[0026] Beneficial effects: the Pt-Au / NM electrode is prepared by the two-step electrodeposition method, which effectively avoids the strong adsorption of the traditional platinum-based catalyst to the intermediate product in the process of ethanol oxidation reaction, thereby preventing the excessive dehydrogenation of ethanol to generate CO2 and other greenhouse gases on the anode, and improving the selectivity and environmental friendliness of the fuel cell; the prepared Pt-Au / NM electrode has excellent stability, can effectively inhibit the strong adsorption of the intermediate product on the catalyst surface, avoid the catalyst poisoning phenomenon, and prolong the service life of the fuel cell; by optimizing the electrodeposition parameters and concentration and other factors, the catalytic activity and selectivity of the prepared electrode are improved, thereby improving the overall performance of the fuel cell; the mature electrodeposition technology is used to prepare the electrode, the process route is simple, the raw materials are widely available, and the manufacturing cost is reduced; the fuel cell based on the Pt-Au / NM electrode realizes the efficient and high-selectivity production of acetate value-added chemicals and electrical energy under the condition of no CO2 emission, and has good economic and environmental benefits. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The figure is a schematic diagram of the direct ethanol fuel cell prepared by the present application.

[0028] Figure 2 The SEM image of the Pt-Au / NM electrode prepared in Example 1.

[0029] Figure 3 The TEM image of the Pt-Au / NM electrode prepared in Example 1.

[0030] Figure 4 The discharge power density curve of the fuel cell tested by the electrochemical workstation in Example 1.

[0031] Figure 5 The faradic efficiency of the anode ethanol oxidation product acetate of the fuel cell tested by ion chromatography in Example 1.

[0032] Figure 6 The concentration comparison column chart of the carbonate in the fuel cell anode electrolyte tested by ion chromatography for example 1 before and after the constant potential test. DETAILED DESCRIPTION

[0033] The present application provides a CO2 emission-free fuel cell and an electrodeposition manufacturing method of the electrode thereof, in order to make the purpose, technical scheme and effect of the present application more clear and definite, the present application is further described in detail below. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application.

[0034] In the process of ethanol oxidation reaction, the traditional platinum-based catalyst is easy to cause excessive dehydrogenation of ethanol on the anode due to the strong adsorption of intermediate products, generating greenhouse gases such as carbon dioxide, which reduces the selectivity and environmental friendliness of the fuel cell; at the same time, the strong adsorption of intermediate products on the surface of the catalyst may cause catalyst poisoning, which reduces the stability and service life of the fuel cell.

[0035] Based on this, the present application provides a CO2 emission-free fuel cell for directly oxidizing ethanol to acetate, the fuel cell comprising an anode electrode, a cathode electrode and an ion membrane arranged between the anode electrode and the cathode electrode, the anode electrode being a nickel mesh electrode with Au and Pt deposited in sequence, the preparation of the anode electrode comprising the steps of: acid washing the nickel mesh to remove the surface oxide layer, and reserving after ultrasonic cleaning; then clamping the cleaned nickel mesh and immersing it in a gold electrodeposition solution, using a three-electrode mode, using an electrochemical workstation to electrodeposited Au on the surface of the nickel mesh, and using deionized water to rinse the surface residual gold electrodeposition solution after electrodeposition; using the same electrodeposition method, replacing the gold electrodeposition solution with a platinum electrodeposition solution, using an electrochemical workstation to plate Pt on the surface of Au, and using deionized water to rinse the electrode after electrodeposition, and obtaining the nickel mesh electrode with Au and Pt deposited in sequence after drying, denoted as Pt-Au / NM electrode.

[0036] Specifically, as Figure 1As shown, the fuel cell is also provided with external components composed of Ti metal plates, gold-plated current collectors, and graphite flow field plates with serpentine flow channels, which are stacked in turn. The outermost Ti metal plate at both ends of the fuel cell serves to support and protect the internal structure, and also helps the mechanical stability and certain degree of electrical conductivity of the whole cell. The gold-plated current collector is responsible for collecting the current generated on the electrode and effectively conducting the electrons generated by the electrode reaction to realize the output of electric energy. The good electrical conductivity of gold helps to reduce resistance and improve the performance of the battery. The graphite flow field plate with serpentine flow channels can make the reaction gas or liquid uniformly distributed on the electrode surface, ensuring that the electrode reaction can be fully carried out. The graphite material has good electrical conductivity and chemical stability. In the fuel cell, the anode and cathode electrodes are the key sites for electrochemical reactions. Ethanol oxidation occurs on the anode electrode, while reduction occurs on the cathode electrode. The two work together to realize the conversion of chemical energy to electrical energy. The ion membrane is located between the anode and cathode electrodes, allowing specific ions to pass through, separating the reactants and conducting ions, maintaining the charge balance inside the cell, and promoting the continuous progress of the electrochemical reaction. The anode electrolyte is delivered by a peristaltic pump, which can accurately control the flow rate and flow of the anode electrolyte, ensuring the stable progress of the anode reaction. The cathode fuel is adjusted by a flow meter, which can monitor and control the supply of cathode fuel in real time to meet the needs of the cathode reaction. The temperature of the whole fuel cell is accurately controlled by a PID temperature controller. The appropriate temperature is crucial for the performance and stability of the battery. The PID temperature controller can automatically adjust according to the set temperature value, making the battery work within the optimal temperature range. As an example, the flow rate of the anode peristaltic pump is 10-60 rpm, and the flow rate of the cathode flow meter is 50-200 sccm. The temperature control range of the fuel cell is 30-80℃.

[0037] The anode electrode used in the fuel cell is a Pt-Au / NM electrode prepared by a two-step electrodeposition method, which effectively avoids the strong adsorption of intermediate products by traditional platinum-based catalysts during the ethanol oxidation reaction, thereby preventing excessive dehydrogenation of ethanol on the anode to generate CO2 and other greenhouse gases, and improving the selectivity and environmental friendliness of the fuel cell; the prepared Pt-Au / NM electrode has excellent stability, can effectively inhibit the strong adsorption of intermediate products on the catalyst surface, avoid catalyst poisoning, and thereby prolong the service life of the fuel cell; by optimizing electrodeposition parameters and concentration and the like, the catalytic activity and selectivity of the prepared electrode are improved, thereby improving the overall performance of the fuel cell; the electrode is prepared by using mature electrodeposition technology, the process route is simple, and raw materials are widely available, which is conducive to reducing manufacturing costs; the fuel cell composed of the Pt-Au / NM electrode realizes efficient and high-selectivity production of acetate value-added chemicals and electrical energy under the condition of no CO2 emission, and has good economic and environmental benefits.

[0038] In some embodiments, in the process of preparing the Pt-Au / NM electrode, the nickel mesh preferably has a size of 1.5-75 cm in length and 1-50 cm in width; the pickling solution used in the pickling process is hydrochloric acid, sulfuric acid or nitric acid, and the concentration of the pickling solution is 1-2 mol / L; the ultrasonic cleaning time is 5-20 min.

[0039] In some embodiments, Au is electrodeposited on the surface of the nickel mesh by using an electrochemical workstation in a three-electrode mode, including the steps of: preparing a gold electrodeposition solution composed of HAuCl4·4H2O, C6H5Na3O7 and water, and the concentrations of the HAuCl4·4H2O and C6H5Na3O7 are 0.2-2.0 g / L and 0.15-1.5 g / L, respectively; using a saturated calomel electrode as a reference electrode, a platinum mesh electrode as a counter electrode, and a nickel mesh as a working electrode to form a three-electrode mode; and using an electrochemical workstation to electrodeposited gold on the surface of the nickel mesh in a constant current mode, wherein the current size is -100 to -500 mA cm -2 , and the electrodeposition time is 1000-3600 s.

[0040] In some embodiments, the Au surface is plated with Pt using an electrochemical workstation, including the steps of: preparing a platinum electrodeposition solution, the platinum electrodeposition solution consisting of H2PtCl6·6H2O, C6H5Na3O7 and water, the concentrations of the H2PtCl6·6H2O and C6H5Na3O7 being 0.2-2.0 g / L and 0.15-1.5 g / L, respectively; using a saturated calomel electrode as a reference electrode, a platinum mesh electrode as a counter electrode, and a nickel mesh electrode with gold deposited on the surface as a working electrode to form a three-electrode mode; and using the electrochemical workstation to plate platinum on the gold surface in a constant current mode, wherein the current size is -100 to -500 mA cm-2 and the electrodeposition time is 1000-3600 s. -2

[0041] In some embodiments, the cathode electrode material is Pt / C or Pd / C.

[0042] In some embodiments, the ion membrane is an anion exchange membrane, and the anion exchange membrane is of type FAA-3-50 or FAA-3-20 or FAAM-20.

[0043] In some embodiments, the electrolyte for the ethanol oxidation reaction consists of potassium hydroxide and ethanol; the concentration of the potassium hydroxide is 0.5-8.0 mol / L, and the concentration of the ethanol is 1-15 mol / L, but is not limited thereto.

[0044] The application is further explained by specific examples as follows:

[0045] Example 1

[0046] A fuel cell without CO2 emission for directly oxidizing ethanol to acetate, the fuel cell comprising an anode electrode, a cathode electrode, and an ion membrane arranged between the anode electrode and the cathode electrode, the anode electrode being a nickel mesh electrode with Au and Pt deposited thereon in sequence, the cathode electrode being a carbon paper supported Pt / C catalyst, and the ion membrane being an anion exchange membrane of type FAA-3-20. The anode electrolyte is a mixed aqueous solution of 2 mol / L potassium hydroxide and 2 mol / L ethanol, which is transported by a peristaltic pump at a flow rate of 10 rpm. The cathode fuel is oxygen transported by a flow meter at a flow rate of 80 sccm; the fuel cell is temperature controlled by a PID temperature controller, and the operating temperature is controlled at 70 degrees Celsius; and the preparation of the anode electrode includes the steps of:

[0047] ​Nickel mesh (NM) was cut to 1×1.5 cm size, then immersed in 2M hydrochloric acid and ultrasonically cleaned for 10 min to remove surface oxides. The NM electrode was then clamped and immersed in an Au electrodeposition solution with the composition shown in Table 1. The solution consisted of a saturated calomel electrode, a Pt mesh electrode, and an NM working electrode, forming a three-electrode system. An electrochemical workstation was used in constant current mode (-100 mA cm⁻¹). -2 Au was electrodeposited on the NM surface at 1800 s. After electrodeposition, the surface was rinsed with deionized water to remove residual electrodeposition solution. Then, a second electrodeposition step was performed using the same method, but the Au electrodeposition solution was replaced with the Pt electrodeposition solution listed in Table 1. An electrochemical workstation was used in constant current mode (-100 mA / cm²). -2 Pt was deposited on the Au surface at 500s. After electrodeposition, the electrode was rinsed with deionized water and dried to obtain a Pt-Au / NM electrode.

[0048] Table 1. Composition of the electrodeposition solution in Example 1

[0049]

[0050]

[0051] Example 2

[0052] A CO2-free fuel cell is disclosed for the direct oxidation of ethanol to acetate. The fuel cell includes an anode electrode, a cathode electrode, and an ion-exchange membrane disposed between the anode and cathode electrodes. The anode electrode is a nickel mesh electrode with Au and Pt sequentially deposited. The cathode electrode is a Pt / C catalyst supported by carbon paper. The ion-exchange membrane is an anion exchange membrane of type FAA-3-20. The anode electrolyte is a mixed aqueous solution of 2 mol / L potassium hydroxide and 2 mol / L ethanol, transported by a peristaltic pump at a flow rate of 30 rpm. The cathode fuel, oxygen, is transported by a flow meter at a flow rate of 160 sccm. The fuel cell temperature is controlled by a PID temperature controller, maintaining an operating temperature of 70 degrees Celsius. The preparation of the anode electrode includes the following steps:

[0053] Nickel mesh (NM) was cut to 2×3 cm size, then immersed in 2M hydrochloric acid and ultrasonically cleaned for 10 min to remove surface oxides. The NM electrode was then clamped and immersed in an Au electrodeposition solution with the composition shown in Table 2. The solution consisted of a saturated calomel electrode, a Pt mesh electrode, and an NM working electrode, forming a three-electrode system. An electrochemical workstation was used in constant current mode (-150 mA / cm²). -2Au, after the electrodeposition, rinse the surface with deionized water to remove the residual electrodeposition solution. Then, the second step of electrodeposition is performed, using the same electrodeposition method, and the Au electrodeposition solution is replaced with the Pt electrodeposition solution in Table 2. The electrochemical workstation is used in constant current mode (-150 mA cm -2 Au / NM electrode.

[0054] Composition of the electrodeposition solution in Example 2

[0055]

[0056]

[0057] Example 3

[0058] A fuel cell without CO2 emission for direct oxidation of ethanol to acetate, comprising an anode electrode, a cathode electrode and an ionic membrane disposed between the anode electrode and the cathode electrode, the anode electrode is a nickel mesh electrode with Au and Pt deposited in sequence, the cathode electrode is a carbon paper supported Pt / C catalyst, and the ionic membrane is a type FAA-3-20 anion exchange membrane. The anode electrolyte is a mixed aqueous solution of 2 mol / L potassium hydroxide and 2 mol / L ethanol, which is transported by a peristaltic pump at a flow rate of 60 rpm. The cathode fuel is transported by a flow meter at a flow rate of 200 sccm. The fuel cell is temperature controlled by a PID temperature controller, and the operating temperature is controlled at 70 degrees Celsius; the preparation of the anode electrode comprises the steps of:

[0059] A nickel mesh (NM) is cut to a size of 4x6 cm, and then the NM is immersed in 2M hydrochloric acid and ultrasonically cleaned for 10 min to remove the surface oxides of the NM. Then the NM electrode is clamped and immersed in the Au electrodeposition solution, the composition of which is shown in Table 3, and a three-electrode system is formed by a saturated calomel electrode, a Pt mesh electrode and the NM working electrode. The electrochemical workstation is used in constant current mode (-200 mA cm -2 Au, after the electrodeposition, rinse the surface with deionized water to remove the residual electrodeposition solution. Then, the second step of electrodeposition is performed, using the same electrodeposition method, and the Au electrodeposition solution is replaced with the Pt electrodeposition solution in Table 3. The electrochemical workstation is used in constant current mode (-200 mA cm -2 Au / NM electrode.

[0060] Composition of the electrodeposition solution in Example 3

[0061]

[0062]

[0063] Electron microscopy was performed on the Pt-Au / NM electrode prepared in Example 1, and the results are as follows: Figure 2 As shown in the figure, the electrode exhibits a network porous structure, which is beneficial for optimizing mass transfer on the electrode surface to improve electrocatalytic performance.

[0064] Figure 3 TEM image of Pt-Au / NM electrode, from Figure 3 The 0.209 nm fringe spacing of individual Pt nanoparticles closely matches the (111) crystal plane of face-centered cubic Pt. The 0.221 nm fringe spacing of Au nanoclusters closely matches the (200) crystal plane of face-centered cubic Au. TEM shows that Pt nanoparticles are loaded on the surface of the Au catalyst, and this structure helps to fully expose the highly active Pt sites.

[0065] Figure 4 The discharge power density curve of the fuel cell in Example 1, obtained by testing with an electrochemical workstation, is shown. Figure 4 The peak current density of the fuel cell is clearly shown to reach 73 mW / cm². 2 .

[0066] Figure 5 The Faraday efficiency of acetate, the ethanol oxidation product at the anode of the fuel cell in Example 1, was tested by ion chromatography. This efficiency represents the conversion rate of ethanol to acetate. The results show that the selectivity for acetate exceeds 95%.

[0067] Figure 6 The concentration change of carbonate in the anolyte of the fuel cell in Example 1 before and after the constant potential test was tested using ion chromatography. The test results showed that the carbonate concentration remained stable before and after the test, without a significant increase. This indicates that the direct ethanol fuel cell prepared by this invention avoids excessive oxidation to CO2 during the highly selective oxidation of ethanol to acetate, thereby achieving the simultaneous generation of acetate electronic chemicals and electrical energy under conditions of no CO2 emission.

[0068] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A fuel cell with zero CO2 emissions, characterized in that, The fuel cell is used to directly oxidize ethanol to acetate. The fuel cell includes an anode electrode, a cathode electrode, and an ion-exchange membrane disposed between the anode and cathode electrodes. The anode electrode is a nickel mesh electrode with Au and Pt deposited sequentially. The fabrication of the anode electrode includes the following steps: The nickel mesh is pickled to remove the surface oxide layer, and then ultrasonically cleaned for later use. Then, the cleaned nickel mesh was clamped and immersed in the gold electrodeposition solution. Using a three-electrode mode, Au was electrodeposited on the surface of the nickel mesh using an electrochemical workstation. After electrodeposition, the surface was rinsed with deionized water to remove any residual gold electrodeposition solution. Using the same electrodeposition method, but replacing the gold electrodeposition solution with a platinum electrodeposition solution, Pt was plated on the Au surface using an electrochemical workstation. After electrodeposition, the electrode was rinsed with deionized water and dried to obtain a nickel mesh electrode with Au and Pt deposited sequentially, denoted as the Pt-Au / NM electrode.

2. The CO2-free fuel cell according to claim 1, characterized in that, Using a three-electrode mode, Au was electrodeposited on a nickel mesh surface using an electrochemical workstation, including the following steps: A gold electrodeposition solution is prepared, wherein the gold electrodeposition solution is composed of HAuCl4·4H2O, C6H5Na3O7 and water; A three-electrode configuration is formed by using a saturated calomel electrode as the reference electrode, a platinum mesh electrode as the counter electrode, and a nickel mesh as the working electrode. Gold was electrodeposited on a nickel mesh surface using an electrochemical workstation in constant current mode, with a current ranging from -100 to -500 mA cm⁻¹. -2 The electrodeposition time is 1000-3600s.

3. The CO2-free fuel cell according to claim 2, characterized in that, The concentrations of HAuCl4·4H2O and C6H5Na3O7 are 0.2-2.0 g / L and 0.15-1.5 g / L, respectively.

4. The CO2-free fuel cell according to claim 2, characterized in that, Using an electrochemical workstation to plate Pt on an Au surface includes the following steps: A platinum electrodeposition solution is prepared, wherein the platinum electrodeposition solution is composed of H2PtCl6·6H2O, C6H5Na3O7 and water; A three-electrode configuration is formed by using a saturated calomel electrode as the reference electrode, a platinum mesh electrode as the counter electrode, and a nickel mesh with gold deposited on its surface as the working electrode. Platinum was plated onto a gold surface using an electrochemical workstation in constant current mode, with a current ranging from -100 to -500 mA / cm². -2 The electrodeposition time is 1000-3600s.

5. The CO2-free fuel cell according to claim 4, characterized in that, The concentrations of H2PtCl6·6H2O and C6H5Na3O7 are 0.2-2.0 g / L and 0.15-1.5 g / L, respectively.

6. The CO2-free fuel cell according to claim 1, characterized in that, In the step of pickling the nickel mesh to remove the surface oxide layer and then ultrasonically cleaning it for later use, the pickling solution is hydrochloric acid, sulfuric acid, or nitric acid; the concentration of the pickling solution is 1-2 mol / L; and the ultrasonic cleaning time is 5-20 min.

7. The CO2-free fuel cell according to claim 1, characterized in that, The cathode electrode material is Pt / C or Pd / C.

8. The CO2-free fuel cell according to claim 1, characterized in that, The ion exchange membrane is an anion exchange membrane.

9. The CO2-free fuel cell according to claim 1, characterized in that, The nickel mesh is 1.5-75cm long and 1-50cm wide.

Images