Application of ternary perovskite-like metal organic framework material in anion exchange membrane water electrolyser device

Abstract

The invention discloses application of a ternary perovskite-like metal organic framework material in an anion exchange membrane electrolytic cell device, and relates to the technical field of water electrolysis hydrogen production technology and application of anode electrode materials of the water electrolysis hydrogen production technology, the ternary perovskite-like metal organic framework material is used for constructing an anode catalyst of the electrolytic cell device, and the molecular formula of the ternary perovskite-like metal organic framework material is [CH3NH3] [Co < 0.33 > Ni < 0.33 > Fe < 0.33 > (HCOO) 3]. Through system design and optimization of catalyst preparation process parameters, the anode catalyst prepared by adopting the optimization scheme shows remarkable OER activity under the alkaline electrolysis condition, and the application potential of the ternary perovskite-like MOF material as the anode of the AEM electrolytic cell is verified. The invention provides an anode catalyst construction strategy which is clear in preparation process and high in adaptability, has important significance for optimizing and improving AEMWE performance, and has good industrial application prospects.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hydrogen production by electrolysis of water and application of anode electrode materials thereof, and particularly relates to application of a ternary perovskite-like metal organic framework material in an anion exchange membrane water electrolyzer (AEMWE) device. BACKGROUND

[0002] Hydrogen energy, as a clean and high-energy-density secondary energy, has been widely recognized as an important part of realizing the transformation of future sustainable energy structure. Hydrogen production by electrolysis of water has attracted high attention due to its pure product and controllable process. Among them, the anion exchange membrane water electrolysis technology (AEMWE) combines the advantages of the alkaline electrolyzer (AWE) and the proton exchange membrane electrolyzer (PEMWE), has the advantages of high electrolysis efficiency, rich selection of electrode materials and low system cost, and is a research hotspot in the field of green hydrogen production at present.

[0003] In the AEMWE system, the anode oxygen evolution reaction (OER) is a key step that limits the overall water splitting efficiency due to its slow kinetics. Therefore, the development of high-efficiency, stable and cost-controllable anode catalyst materials has become the core problem of improving the performance of AEMWE. The commonly used anode catalysts at present are mostly noble metals (such as Ir, Ru and their oxides) or doped transition metal oxides, which have problems such as resource scarcity, high price and complex preparation, which restricts their application in large-scale industrialization. In recent years, metal organic framework materials have been widely used in the field of electrochemical catalysis due to their highly ordered structure, large specific surface area and strong designability of structure. Among them, the MOF material with ternary perovskite-like structure has a multi-metal synergistic effect and rich active sites, which is an ideal choice for high-performance anode catalysts.

[0004] However, the application of such materials in the anode of AEMWE still faces many challenges: such as the lack of systematic optimization of process parameters such as membrane activation current density, carbon black addition ratio in the anode catalyst, catalyst loading and electrode preparation technology, which leads to the fact that the catalytic activity of the material cannot be fully released, and the overall electrolysis performance of the device needs to be improved. Therefore, it is urgent to establish an anode catalyst preparation strategy based on ternary perovskite-like MOP, and through the optimization of key parameters, to promote its efficient application in AEMWE devices. SUMMARY

[0005] The purpose of the application is to provide application of a ternary perovskite-like metal organic framework material in an anion exchange membrane water electrolyzer device, and particularly relates to application of a ternary perovskite-like metal organic framework material in an anion exchange membrane water electrolyzer device. 0.33 Ni 0.33 Fe0.33 In the anode catalyst system based on [CH3NH3][Co(HCOO)3], the preparation process parameters of the catalyst are optimized to improve the electrolytic performance of the device. The method has clear process and strong adaptability, can effectively improve the performance of AEMWE equipment, and has good application value.

[0006] To achieve the above object, the technical scheme adopted by the present application is as follows:

[0007] The present application provides a kind of ternary perovskite-like metal organic framework material in anion exchange membrane water electrolytic cell device Application, ternary perovskite-like metal organic framework material is used to build the anode catalyst of electrolytic cell device, its molecular formula is [CH3NH3][Co 0.33 Ni 0.33 Fe 0.33 (HCOO)3].

[0008] Preferably, the preparation method of the anode catalyst slurry in the electrolytic cell device comprises:

[0009] The ternary perovskite-like metal organic framework material, conductive carbon black and ionomer solution are dispersed in the mixed solvent, and ultrasonic treatment is carried out to obtain the anode catalyst slurry.

[0010] Preferably, the mass ratio of the ternary perovskite-like metal organic framework material to carbon black is (5-20):1.

[0011] Preferably, the mixed solvent is a mixture of deionized water and isopropanol, and the mass ratio of deionized water to isopropanol is 1:10.

[0012] Preferably, the ultrasonic treatment is carried out at room temperature for 1-2 hours.

[0013] Preferably, the preparation method of the cathode catalyst slurry in the electrolytic cell device comprises:

[0014] The Pt / C catalyst and the ionomer solution are mixed in the mixed solvent, and ultrasonic treatment is carried out to obtain the cathode catalyst slurry.

[0015] Preferably, the mass ratio of the Pt / C catalyst to the ionomer solution is 2:3.

[0016] Preferably, the anode and cathode catalyst slurries are respectively uniformly sprayed on the surface of the nickel felt substrate using ultrasonic spraying equipment, and the mass loading of the anode and cathode catalysts is controlled to be 1.0-3.0 mg cm -2 .

[0017] Preferably, before testing the performance of the electrolytic cell device, electrochemical activation treatment is required, and the activation current density is 0.2-1 A cm -2 .

[0018] Preferably, in the electrolytic cell device, the electrolyte is 1 mol L -1 KOH solution.

[0019] Advantages of the present application

[0020] Compared with the prior art, the present application has the following obvious advantages:

[0021] 1. The present application optimizes the membrane activation current density, carbon black addition ratio, catalyst loading and electrode preparation process around the key preparation process parameters of anode catalyst, forming a clear and feasible optimization strategy, and providing an effective method for high-performance electrode preparation.

[0022] 2. Under the combination of the above parameters, the prepared anode catalyst can significantly reduce the operating voltage in the water electrolysis process and improve the oxygen evolution reaction efficiency, thereby improving the overall performance of the anion exchange membrane water electrolytic cell.

[0023] 3. The spraying and activation treatment method is simple and controllable, suitable for the preparation of various conductive substrates and membrane electrode assemblies, and has good practical operability and engineering adaptability.

[0024] 4. The catalyst system involved in the present application does not depend on precious metal materials, has cost advantages, can be applied to the preparation of other MOP non-precious metal catalyst anodes, and has industrialization feasibility and wide application prospects. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The AEMWE polarization curve graph obtained under the condition that the membrane activation current density is 0.2 Acm-2 in Example 1 of the present application. -2

[0026] Figure 2 The AEMWE polarization curve graph obtained under the condition that the membrane activation current density is 0.5 Acm-2 in Example 2 of the present application. -2

[0027] Figure 3 The AEMWE polarization curve graph obtained under the condition that the membrane activation current density is 1.0 Acm-2 in Example 3 of the present application. -2

[0028] Figure 4 The AEMWE polarization curve graph obtained under the condition that the mass ratio of anode catalyst to carbon black is 7:1 in Example 4 of the present application.

[0029] Figure 5 The AEMWE polarization curve graph obtained under the condition that the mass ratio of anode catalyst to carbon black is 10:1 in Example 5 of the present application.​​​

[0030] Figure 6 This is a polarization curve diagram of AEMWE when the mass ratio of anode catalyst to carbon black is 20:1 in Example 6 of the present invention.

[0031] Figure 7 In Example 7 of the present invention, the anode catalyst loading is 1.0 mg cm -2 Polarization curve of AEMWE when .

[0032] Figure 8 In Example 8 of the present invention, the anode catalyst loading is 2.0 mg cm -2 Polarization curve of AEMWE when .

[0033] Figure 9 In Example 9 of the present invention, the anode catalyst loading is 3.0 mg cm -2 Polarization curve of AEMWE when .

[0034] Figure 10 This is a polarization curve diagram of AEMWE when the anode electrode is prepared using the CCM process in Example 10 of the present invention.

[0035] Figure 11 For Comparative Example 1, when the membrane activation current density is 4.0 A cm -2 AEMWE polarization curves obtained under 3 conditions.

[0036] Figure 12 This is the polarization curve of AEMWE when the mass ratio of anode catalyst to carbon black is 1:1 in Comparative Example 2.

[0037] Figure 13 In Comparative Example 3, the anode catalyst loading was 0.5 mg cm -2 Polarization curve of AEMWE when ;

[0038] Figure 14 This is a schematic structural diagram of an anion exchange membrane water electrolyzer device of the present invention;

[0039] In the figure, 1. Potassium hydroxide solution and oxygen outlet, 2. Anode plate, 3. Anode potassium hydroxide solution inlet, 4. Anode gasket, 5. Anode: perovskite-like MOF catalyst, 6. Anion exchange membrane, 7. Cathode: platinum-carbon catalyst, 8. Cathode gasket, 9. Cathode plate, 10. Potassium hydroxide solution and hydrogen outlet, 11. Cathode potassium hydroxide solution inlet. DETAILED DESCRIPTION

[0040] The application provides application of a ternary perovskite-like metal organic framework material in an anion exchange membrane water electrolysis cell device, the ternary perovskite-like metal organic framework material is used for constructing an anode catalyst of the electrolysis cell device, and the molecular formula of the ternary perovskite-like metal organic framework material is [CH3NH3][Co 0.33 Ni 0.33 Fe 0.33 (HCOO)3], Co, Ni and Fe in the structure of the ternary perovskite-like metal organic framework material jointly occupy B position, and a stable perovskite-type metal organic framework structure is formed.

[0041] According to the application, the preparation method of the anode catalyst slurry in the electrolysis cell device comprises the following steps:

[0042] The ternary perovskite-like metal organic framework material, conductive carbon black and ionomer solution are dispersed in a mixed solvent, the mixed solvent is preferably a mixture of deionized water and isopropanol, the mass ratio of the deionized water to the isopropanol is preferably 1:10, then ultrasonic treatment is carried out, the temperature of the ultrasonic treatment is preferably room temperature, and the time of the ultrasonic treatment is preferably 1-2 hours, so that the anode catalyst slurry is obtained. The mass fraction of the carbon black is preferably 4%-13%; the mass ratio of the ternary peroviskite-like metal organic framework material to the carbon black is preferably (5-20):1, and more preferably 10:1; and the mass ratio of the ternary peroviskite-like metal organic framework material to the ionomer solution is preferably 2:3; wherein the mass percentage of the ionomer solution is preferably 5wt.%, and the ionomer solution is commercially available.

[0043] According to the application, the preparation method of the cathode catalyst slurry in the electrolysis cell device comprises the following steps:

[0044] The Pt / C catalyst and the ionomer solution are mixed in a mixed solvent, the mixed solvent is preferably a mixture of deionized water and isopropanol, the mass ratio of the deionized water to the isopropanol is preferably 1:10, ultrasonic treatment is carried out, the temperature of the ultrasonic treatment is preferably room temperature, and the time of the ultrasonic treatment is preferably 1-2 hours, so that the cathode catalyst slurry is obtained. The mass ratio of the Pt / C catalyst to the ionomer solution is preferably 2:3; wherein the mass percentage of the ionomer solution is preferably 5wt.%, the ionomer solution is commercially available, and the manufacturer is preferably Dioxide Materials.

[0045] The obtained anode and cathode catalyst slurries are respectively uniformly sprayed on the surface of a nickel felt substrate by using an ultrasonic spraying device, and the mass loading of the catalysts of the anode and the cathode is controlled to be 1.0-3.0 mg cm -2 .

[0046] The membrane electrode assembly is completed by integrating the anode, anion exchange membrane and cathode between two titanium bipolar plates. To prevent uneven stress or excessive compression of the electrode, 3mm thick fluororubber gaskets are placed on both sides of the anode and cathode. Symmetrical fixation is achieved by eight diagonal fastening bolts to ensure good sealing performance of the entire AEMWE device. The electrolyte used in the device is preferably 1 mol L -1 KOH solution, with a flow rate of 35 mL / min and an operating temperature of 60±2℃. The polarization curve test of the AEMWE is completed by a direct current power supply (DC power supply, model F3020). -1

[0047] Before testing the performance of the electrolytic cell device, electrochemical activation treatment is required, and the activation current density is 0.2-1 A / cm -2 .

[0048] To make the purpose, technical scheme and effect of the present application clearer and more explicit, the following examples are used to further illustrate the present application. It should be pointed out that the specific implementation described here is only used to explain the present application, and is not used to limit the present application.

[0049] The membrane activation current density in Example 1 is 0.2 A / cm -2 under the condition of AEMWE performance evaluation

[0050] As shown in Figure 14 , the anion exchange membrane water electrolysis cell device described in this embodiment includes: potassium hydroxide solution and oxygen outlet 1, anode plate 2, anode potassium hydroxide solution inlet 3, anode gasket 4, anode: calcium titanate-like MO F catalyst 5, anion exchange membrane 6, cathode: platinum-carbon catalyst 7, cathode gasket 8, cathode plate 9, potassium hydroxide solution and hydrogen outlet 10, cathode potassium hydroxide solution inlet 11, the effective area of the anode and cathode is 4.0 cm 2 , the model of the anion exchange membrane AEM is MTCP-50, and the anion exchange membrane needs to be soaked in 1 mol / L -1 potassium hydroxide (KOH) solution for at least 24 hours before use to complete the pretreatment. Both the anode and cathode catalyst electrodes are prepared by the catalyst coated substrate method.

[0051] The preparation method of the anode catalyst slurry is as follows: 200 mg of ternary calcium titanate-like metal organic framework material [CH3NH3][Co 0.33 Ni 0.33 Fe 0.33 ​​A catalyst slurry was prepared by adding 200 mg of 40% Pt / C catalyst and 300 mg of 5 wt.% ionomer solution (from Dioxide Materials) into 16 g of mixed solvent (deionized water and isopropyl alcohol with a mass ratio of 1:10) and ultrasonically dispersing for 1 hour at room temperature.

[0052] The anode and cathode catalyst slurries were prepared as follows: 200 mg of 40% Pt / C catalyst and 300 mg of 5 wt.% ionomer solution were added into 16 g of mixed solvent (deionized water and isopropyl alcohol with a mass ratio of 1:10) and ultrasonically dispersed for 1 hour under the same conditions. The obtained anode and cathode catalyst slurries were uniformly sprayed onto the surface of a nickel felt substrate using an ultrasonic spraying device, and the mass loading of the anode and cathode catalysts was controlled to be 1.0 mg cm -2 .

[0053] The membrane electrode assembly was integrated by placing the anode, anion exchange membrane and cathode between two titanium bipolar plates, and the AEMWE device was assembled with a torque of 8 Nm. To prevent uneven stress or excessive compression of the electrodes, 3 mm thick fluororubber gaskets were placed on both sides of the anode and cathode. The entire AEMWE device was fixed symmetrically by eight diagonal fastening bolts to ensure good sealing performance. The electrolyte used in the device was 1 mol L -1 KOH solution, and the flow rate was set to 35 mL min -1 and the operating temperature was 60±2℃. The polarization curve test of the AEMWE was completed by a direct current power supply (DC power supply, model F3020).

[0054] Figure 1 The polarization curve of the AEMWE obtained in Example 1 was tested under the condition of a membrane activation current density of 0.2 A cm -2 and an activation time of 1 h. The test results showed that the electrolytic cell voltage was 1.93 V at a current density of 1 A cm -2 and the voltage was 2.11 V at a current density of 2 A cm -2 , showing excellent AEMWE performance.

[0055] Performance evaluation of the AEMWE in Example 2 under a membrane activation current density of 0.5 A cm -2

[0056] The AEMWE assembly steps in this example were the same as those in Example 1.

[0057] Figure 2 The polarization curve of the AEMWE obtained in Example 2 was tested under the condition of a membrane activation current density of 0.5 A cm -2 ​, the cell voltage was 1.91 V at a current density of 1 A cm -2 and 2.10 V at a current density of 2 A cm -2 . Compared with Example 1 (0.2 A cm -2 ), the AEMWE of this example showed lower overpotential under the same test conditions, indicating that appropriately increasing the membrane activation current density helps improve the electrolysis performance of the AEMWE.

[0058] Performance evaluation of the AEMWE of Example 3 under the condition of a membrane activation current density of 1.0 A cm -2

[0059] The assembly steps of the AEMWE in this example were the same as those of Example 1.

[0060] Figure 3 The polarization curve of the AEMWE obtained under the condition of a membrane activation current density of 1.0 A cm -2 and an activation time of 1 h was tested. The test results showed that the cell voltage was 1.98 V at a working current density of 1 A cm -2 and increased to 2.16 V at a current density of 2 A cm -2 . Compared with Example 1 (0.2 A cm -2 ) and Example 2 (0.5 A cm -2 ), the AEMWE corresponding to this example showed a significant increase in overpotential and a decrease in catalytic activity under the same working conditions. The results showed that the membrane activation current density had a significant impact on the performance of the AEMWE, and its optimization needed to be controlled within a reasonable range to avoid a decrease in catalytic performance due to insufficient or excessive activation.

[0061] Performance evaluation of the AEMWE under the condition of a mass ratio of anode catalyst to carbon black of 7:1

[0062] This example was conducted to explore the influence of a mass ratio of anode catalyst to conductive carbon black of 7:1 on the performance of the AEMWE under the condition of a membrane activation current density of 0.5 A cm -2 and a catalyst loading of 1.0 mg cm -2 . Specifically, 200 mg of [CH3NH3][Co 0.33 Ni 0.33 Fe 0.33 ​(HCOO)3], 28.6 mg of conductive carbon black, and 300 mg of a 5 wt.% ionomer solution were added to 16 g of a mixed solvent (deionized water: isopropyl alcohol, mass ratio: 1:10). Ultrasonic treatment was performed at room temperature for 1 hour to obtain a uniform catalyst slurry. The anode electrode was prepared using the CCS process. Other assembly steps and testing conditions were the same as in Example 2.

[0063] Figure 4 The AEMWE polarization curve is obtained when the mass ratio of anode catalyst to carbon black is 7:1 in Example 4. -2 When the cell voltage is 1.85 V and the current density is 2 A cm -2 When the voltage is 2.09 V, the results show that the addition ratio of conductive carbon black has a certain influence on the electrolytic performance of AEMWE.

[0064] Example 5 Performance evaluation of AEMWE at a mass ratio of anode catalyst to carbon black of 10:1

[0065] In this example, the membrane activation current density is 0.5 A cm -2 , the catalyst loading was 1.0 mg cm -2 Under the conditions of 10:1, the effect of the mass ratio of anode catalyst to conductive carbon black on the performance of AEMWE was investigated. Specifically, 200 mg of [CH3NH3][Co 0.33 Ni 0.33 Fe 0.33 A 5 wt.% ionomer solution of (HCOO)3] catalyst, 20 mg of conductive carbon black, and 300 mg of the ionomer solution were added to 16 g of a mixed solvent (deionized water: isopropyl alcohol, mass ratio: 1:10) and ultrasonicated at room temperature for 1 hour to obtain a uniform catalyst slurry. The anode electrode was prepared using the CCS process. Other assembly steps and testing conditions were the same as in Example 4.

[0066] Figure 5 The polarization curve of AEMWE under this condition is shown. -2 When the electrolytic cell voltage is 1.83 V and the current density is 2 A cm -2 The voltage was 2.08 V. The results show that when the mass ratio of anode catalyst to carbon black is 10:1, the AEMWE device achieves higher electrolysis performance while maintaining good conductivity, indicating that the matching relationship between the conductive component and the active component has a significant regulatory effect on the overall performance.

[0067] Example 6 Performance evaluation of AEMWE at a mass ratio of anode catalyst to carbon black of 20:1

[0068] The membrane activation current density is 0.5 A cm -2 , the catalyst loading is 1.0 mg cm -2 , and the mass ratio of anode catalyst to conductive carbon black is 20:1. Specifically, 200 mg of [CH3NH3][Co 0.33 Ni 0.33 Fe 0.33 (HCOO)3] catalyst, 10 mg of conductive carbon black, and 300 mg of 5 wt.% ionomer solution are added to 16 g of mixed solvent (deionized water and isopropyl alcohol in a mass ratio of 1:10), and the mixture is ultrasonically treated at room temperature for 1 hour to obtain a uniform catalyst slurry. The anode electrode is prepared by the CCS process, and other assembly steps and test conditions are the same as in Example 4.

[0069] Figure 6 The polarization curve of the AEMWE under this condition is shown in FIG. 7. When the current density is 1 A cm -2 , the cell voltage is 1.86 V, and when the current density is 2 A cm -2 , the voltage is 2.09 V. The results show that when the proportion of conductive carbon black is further reduced to 20:1, although the content of the active component of the catalyst is high, the conductivity is reduced, resulting in lower cell performance than the 10:1 ratio, indicating that too much carbon black content can affect the electrolysis performance of the AEMWE.

[0070] Performance evaluation of the AEMWE under the condition of anode catalyst loading of 1.0 mg cm -2

[0071] The membrane activation current density is 1.0 A cm -2 , the mass ratio of anode catalyst to conductive carbon black is 10:1, and the anode catalyst loading is 1.0 mg cm -2 . Other assembly steps and test conditions are the same as in Example 5.

[0072] Figure 7 The polarization curve of the AEMWE under this loading condition is shown in FIG. 8. When the working current density is 1.0 A cm -2 , the cell voltage is 1.83 V, and when the current density is 2 A cm -2 , the voltage rises to 2.08 V. The results show that under the condition of catalyst loading of 1.0 A cm -2 , the AEMWE exhibits good electrolysis performance.

[0073] Performance evaluation of the AEMWE under the condition of anode catalyst loading of 2.0 mg cm -2 ​​

[0074] This example investigates the effect of anode catalyst loading of 2.0 mg cm -2 at a mass ratio of anode catalyst to conductive carbon black of 10:1 on the performance of AEMWE. Other assembly steps and testing conditions are the same as Example 7. -2

[0075] Figure 8 The polarization curve of AEMWE at this loading condition is shown. At a working current density of 1 A cm -2 , the cell voltage is 1.78 V; at 2 A cm -2 , the voltage increases to 2.03 V. The results show that AEMWE devices exhibit lower operating voltage when the anode catalyst loading is 2.0 mg cm -2 , indicating that this loading achieves a good balance between electrode thickness, active site number, and mass transfer resistance, significantly reducing the electrolysis performance of AEMWE.

[0076] Performance evaluation of AEMWE at anode catalyst loading of 3.0 mg cm -2

[0077] This example investigates the effect of anode catalyst loading of 3.0 mg cm -2 at a mass ratio of anode catalyst to conductive carbon black of 10:1 on the performance of AEMWE. Other assembly steps and testing conditions are the same as Example 7. -2

[0078] Figure 9 The polarization curve of AEMWE at this loading condition is shown. At a working current density of 1 A cm -2 , the cell voltage is 1.81 V; at 2 A cm -2 , the voltage increases to 2.13 V. The results show that when the anode catalyst loading is 3.0 mg cm -2 , the AEMWE device fails to further improve performance, indicating that excessive catalyst may introduce mass transfer resistance, affecting the overall reaction performance.

[0079] Performance evaluation of AEMWE when constructing anode electrode using CCM process

[0080] This example investigates the effect of anode catalyst loading of 2.0 mg cm -2 at a mass ratio of anode catalyst to conductive carbon black of 10:1 on the performance of AEMWE. Other assembly steps and testing conditions are the same as Example 7. -2 ​​​The anode electrode was constructed using CCM technique to evaluate the impact of construction process on the performance of AEMWE. Other assembly steps and test conditions were the same as Example 5. Figure 10 The AEMWE polarization curve plot prepared using the above CCM process for anode electrode is shown. The cell voltage was 2.25 V at 1 A cm -2 and 2.57 V at 2 A cm -2 .

[0081] The results show that the anode electrode prepared using the CCS process can achieve a lower operating voltage and has good catalytic performance. Compared with the CCM process, the CCS process is more suitable for constructing high-performance AEMWE anode electrodes.

[0082] The AEMWE performance evaluation under the condition of a membrane activation current density of 4.0 A cm -2 .

[0083] To verify the impact of membrane activation current density on the performance of AEMWE, this control example was set, with the membrane activation current density increased to 4.0 A cm -2 . The remaining parameters were the same as Example 2, including the mass ratio of anode catalyst to carbon black of 10:1, the catalyst loading of 1.0 mg cm -2 , and the construction method of CCS process.

[0084] Figure 11 The AEMWE polarization curve plot obtained under this condition is shown. The test results show that the cell voltage was 2.30 V at 1 A cm -2 and 2.52 V at 2 A cm -2 . The results show that too high a membrane activation current density will lead to the loss of anode active sites or the destruction of the surface structure, significantly increasing the operating voltage, reducing the overall performance of AEMWE, and further verifying the key role of appropriate membrane activation current density in performance optimization.

[0085] The AEMWE performance evaluation under the condition of a mass ratio of anode catalyst to carbon black of 1:1

[0086] This control example was tested using a formulation with a mass ratio of anode catalyst to conductive carbon black of 1:1 under the condition of a membrane activation current density of 0.5 A cm -2 and a catalyst loading of 1.0 mg cm -2 . The catalyst construction method was CCS process, and the remaining test conditions were consistent with Example 5.

[0087] Figure 12The AEMWE polarization curve obtained under this condition is shown. The test results show that when the working current density is 1 A cm -2 , the electrolytic cell voltage is 2.06 V; when the current density is 2 A cm -2 , the voltage rises to 2.42 V. The results show that the AEMWE performance under the control example condition is significantly lower than that of the AEMWE under the above-mentioned optimization scheme, which further proves the regulating effect of the mass ratio of anode catalyst to carbon black on the performance of AEMWE.

[0088] The anode catalyst loading of Comparative Example 3 is 0.5 mg cm -2 Performance evaluation of AEMWE under the condition

[0089] This example is tested under the condition that the membrane activation current density is 1.0 A cm -2 , the mass ratio of anode catalyst to conductive carbon black is 10:1, and the anode catalyst loading is 0.5 mg cm -2 . Other assembly steps and test conditions are the same as those of Example 5.

[0090] Figure 13 The AEMWE polarization curve obtained under this condition is shown. The test results show that when the working current density is 1 A cm -2 , the electrolytic cell voltage is 1.99 V; when the current density is 2 A cm -2 , the voltage rises to 2.41 V. The results show that the AEMWE performance under the control example condition is significantly lower than that of the AEMWE under the above-mentioned optimization scheme, which further proves the regulating effect of the anode catalyst loading ratio on the performance of AEMWE.

[0091] The above-mentioned is only the preferred embodiment of the present application, and it should be noted that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements can be made, and these improvements should be considered as the protection scope of the present application.

Claims

1. Application of a ternary perovskite metal organic framework material in an anion exchange membrane water electrolyzer device, characterized in that: The ternary perovskite metal organic framework material is used to construct the anode catalyst of the electrolytic cell device, and its molecular formula is [CH3NH3][Co 0.33 Ni 0.33 Fe 0.33 (HCOO)3].

2. The use according to claim 1, characterized in that In the electrolytic cell device, the method for preparing the anode catalyst slurry comprises: The ternary perovskite metal organic framework material, conductive carbon black and ionomer solution are dispersed in a mixed solvent and ultrasonically treated to obtain an anode catalyst slurry.

3. The use according to claim 2, characterized in that The mass ratio of the ternary perovskite metal organic framework material to carbon black is (5-20):

1.

4. The use according to claim 2, characterized in that The mixed solvent is a mixture of deionized water and isopropyl alcohol, wherein the mass ratio of deionized water to isopropyl alcohol is 1:

10.

5. The use according to claim 2, characterized in that The temperature of the ultrasonic treatment is room temperature, and the time is 1 to 2 hours.

6. The use according to claim 1, characterized in that In the electrolytic cell device, the method for preparing the cathode catalyst slurry comprises: The Pt / C catalyst and the ionomer solution are added into a mixed solvent and ultrasonically treated to obtain a cathode catalyst slurry.

7. The use according to claim 6, characterized in that The mass ratio of the Pt / C catalyst to the ionomer solution is 2:

3.

8. The use according to claim 1, characterized in that The anode and cathode catalyst slurries were uniformly sprayed onto the surface of the nickel felt substrate using ultrasonic spraying equipment, and the catalyst mass loading of the anode and cathode was controlled to be 1.0-3.0 mg cm -2 .

9. The use according to claim 1, characterized in that Before the electrolytic cell device is tested for performance, it needs to be electrochemically activated, and the activation current density is 0.2-1Acm -2 .

10. The use according to claim 1, characterized in that In the electrolytic cell device, the electrolyte is 1 mol L - 1 KOH solution.

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