Method for evaluating the stability of a catalytic electrode for electrolysis of water under industrial conditions

Abstract

The application discloses a method for evaluating stability of an electrolytic water catalytic electrode under industrial conditions, the electrolytic water catalytic electrode comprising an electrically conductive substrate and a catalyst layer grown on the electrically conductive substrate, and the method comprises the following steps: S1, evaluating the adhesion stability between the electrically conductive substrate and the catalyst layer in the electrolytic water catalytic electrode and / or the intrinsic stability of the catalyst layer in the electrolytic water catalytic electrode, and if the evaluation result of the adhesion stability and / or the evaluation result of the intrinsic stability is qualified, executing step S2; S2, obtaining the service life of the electrolytic water catalytic electrode under industrial conditions according to the dissolution amount of the electrolytic water catalytic electrode after working under simulated industrial conditions for a certain time. The application can accurately predict the service life of the catalytic electrode under industrial conditions on the basis of evaluating the adhesion stability and the intrinsic stability of the electrolytic water catalytic electrode, and the evaluation method is simple and feasible, and can be widely applied to the field of industrial electrolytic water.

Description

Technical Field

[0001] This invention belongs to the field of industrial water electrolysis for hydrogen production technology, specifically relating to a method for evaluating the stability of a catalytic electrode for water electrolysis under industrial conditions. Background Technology

[0002] Hydrogen energy, with its zero-pollution, high energy density, and abundant sources, is considered one of the most promising sustainable energy sources for the future. Hydrogen has relatively abundant sources, and existing industrial hydrogen production technologies mainly include hydrocarbon steam reforming, hydrocarbon partial oxidation, water-gas conversion, methane cracking, and water electrolysis. Among these, water electrolysis has many advantages: 1. It is green and environmentally friendly – ​​the raw material for water electrolysis is water, and the products are oxygen and hydrogen, both non-toxic and environmentally friendly substances, and water is inexhaustible; 2. The product purity is high – the hydrogen produced by water electrolysis can generally reach a purity of 99.9%, which is high enough that no further purification is needed; 3. The equipment and operation are simple. The disadvantages are the high production cost of hydrogen, the high electricity consumption due to water electrolysis, and the relatively low energy utilization rate, generally only around 50%. One current approach is to fully utilize intermittent renewable energy sources such as solar, wind, and geothermal energy as energy sources for hydrogen production through water electrolysis; the other is to research efficient non-precious metal-based water electrolysis energy materials as electrocatalysts for water splitting reactions to reduce the overpotential generated by the cathode and anode reactions.

[0003] After years of research and development, Ni-based electrocatalysts (including alloys, oxides, hydroxides, sulfides, phosphides, and nitrides) have attracted widespread attention in alkaline water electrolysis for hydrogen production due to their advantages such as low cost, diverse composition, rich chemical valence states, and good catalytic activity. This has been demonstrated not only under laboratory conditions (current ~10 mA / cm²) but also in practical applications. 2 It exhibits excellent point catalytic performance (at room temperature to 25°C and with low-concentration electrolytes up to 1M KOH), and is also suitable for industrial water electrolysis (current > 300 mA / cm²). 2Significant progress has also been made in the development of electrolytic water catalysts (temperature 60-80℃, electrolyte concentration 5M-10M KOH). For the industrial application of water electrolysis catalysts, activity and stability are two extremely important aspects. Currently, Raney nickel is a widely used electrode material in the water electrolysis hydrogen production industry. Due to its stable catalyst structure, it has stability for decades. However, its HER and OER catalytic activities are not high, and there is still considerable room for improvement in its practical industrial applications. Therefore, researching efficient and stable industrial water electrolysis catalysts is of great significance. Currently, the industrial water electrolysis catalysts that have been researched and prepared generally have significantly improved activities. However, due to the harsh working conditions of high current density, high concentration, and high-temperature electrolyte in industrial water electrolysis, the continuous working stability of new electrode catalytic materials under simulated industrial environments varies (from tens to hundreds of hours). The industrial application of water electrolysis catalysts not only requires a significant improvement in catalytic activity compared to Raney nickel, but also necessitates reliable stability prediction (over 10 years) based on experimental testing under harsh industrial conditions (thousands of hours of operation).

[0004] Therefore, given the potential of electrocatalysts for water electrolysis under industrial conditions, it is necessary to provide a method for evaluating the stability of catalytic electrodes for water electrolysis under industrial conditions, in order to assess the economic practicality of such catalytic electrodes in the field of industrial water electrolysis. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method for evaluating the stability of a catalytic electrode for water electrolysis under industrial conditions.

[0006] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0007] A method for evaluating the stability of a water electrolysis catalytic electrode under industrial conditions, the water electrolysis catalytic electrode comprising a conductive substrate and a catalyst layer grown on the conductive substrate, the stability evaluation method comprising:

[0008] S1. Evaluate the adhesion stability between the conductive substrate and the catalyst layer in the water electrolysis catalytic electrode and / or the intrinsic stability of the catalyst layer in the water electrolysis catalytic electrode. If the adhesion stability evaluation result and / or the intrinsic stability evaluation result are qualified, proceed to step S2.

[0009] S2. Based on the amount of dissolution of the water electrolysis catalytic electrode after working for a certain period of time under simulated industrial conditions, obtain the service life of the water electrolysis catalytic electrode under industrial conditions.

[0010] In one embodiment, the evaluation of the adhesion stability between the conductive substrate and the catalyst layer in the water electrolysis catalytic electrode in step S1 specifically involves:

[0011] Obtain the initial mass M0 of the catalyst layer in the water electrolysis catalytic electrode;

[0012] The mass of catalyst layer detachment, M, was obtained by ultrasonically vibrating the water electrolysis catalytic electrode or by bonding it with adhesive tape.

[0013] The adhesion stability of the water electrolysis catalytic electrode is obtained as X = M / M0.

[0014] In one embodiment, in step S1, if the adhesion stability X of the water electrolysis catalytic electrode is less than or equal to a, the adhesion stability assessment result is deemed qualified; otherwise, the adhesion stability assessment result is deemed unqualified, where a is a preset adhesion stability threshold.

[0015] In one embodiment, the preset adhesion stability threshold α is 10%.

[0016] In one embodiment, the ultrasonic oscillation power is 5W to 50W, the oscillation frequency is 20kHz to 100kHz, and the oscillation time is 2min to 30min.

[0017] In one embodiment, step S1, evaluating the intrinsic stability of the catalyst layer in the water electrolysis catalytic electrode, includes:

[0018] Based on the current density-time relationship of the water electrolysis catalytic electrode under simulated industrial conditions, the change in current density ΔJ over a certain time period is obtained, and the rate of change of current density Y = ΔJ / J0 is derived, where J0 is the initial current density; and / or,

[0019] Based on the X-ray diffraction patterns of the water electrolysis catalytic electrode before and after operating under simulated industrial conditions for a certain period of time, the angular change value Δ2θ of the X-ray diffraction peaks in the X-ray diffraction patterns was obtained; and / or,

[0020] Based on the X-ray diffraction patterns of the water electrolysis catalytic electrode before and after working under simulated industrial conditions for a certain period of time, the intensity change value ΔI of the X-ray diffraction peak in the X-ray diffraction pattern is obtained, and the intensity change rate of the X-ray diffraction peak is obtained as Z = ΔI / I0, where I0 is the X-ray diffraction intensity in the X-ray diffraction pattern of the water electrolysis catalytic electrode before working.

[0021] In one embodiment, in step S2, if the rate of change of current density Y ≤ b, and / or the angle change value Δ2θ of the X-ray diffraction peak ≤ c, and / or the rate of change of intensity of the X-ray diffraction peak Z ≤ d, then the intrinsic stability assessment result is deemed qualified; otherwise, the intrinsic stability assessment result is deemed unqualified. Here, b is a preset threshold for the rate of change of current density, c is a preset threshold for the angle change of the X-ray diffraction peak, and d is a preset threshold for the rate of change of intensity of the X-ray diffraction peak.

[0022] In one embodiment, the preset current density change rate threshold b is 10%, and / or the preset X-ray diffraction peak angle change threshold c is 1°, and / or the preset X-ray diffraction peak intensity change rate threshold d is 10%.

[0023] In one embodiment, step S2 specifically includes:

[0024] The amount of dissolution m of the catalyst layer in the water electrolysis catalytic electrode after working for a certain time T0 under simulated industrial conditions was obtained based on inductively coupled plasma atomic emission spectroscopy.

[0025] The service life of the water electrolysis catalytic electrode under industrial conditions is obtained as: T=(M0 / m)*T0, where M0 is the initial mass of the catalyst layer in the water electrolysis catalytic electrode.

[0026] In one embodiment, the simulated industrial conditions are:

[0027] The electrolyte has an alkali content of 3 mol / L to 10 mol / L, an electrolyte temperature of 50℃ to 98℃, and a current density of 400 mA / cm². 2 ~2000mA / cm 2 The working hours range from 1 day to 360 days.

[0028] The present invention has the following beneficial effects:

[0029] Based on the evaluation of the adhesion stability and intrinsic stability of the water electrolysis catalytic electrode, this invention accurately predicts the service life of the catalytic electrode under industrial conditions. The evaluation method is simple and feasible, and can be widely applied in the field of industrial water electrolysis. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic flowchart of the method for evaluating the stability of the catalytic electrode for water electrolysis under industrial conditions in this invention.

[0032] Figure 2a This is an initial surface morphology diagram of a nickel-cobalt-sulfur / nickel mesh composite electrode in a specific embodiment of the present invention;

[0033] Figure 2b This is a surface morphology image of a nickel-cobalt-sulfur / nickel mesh composite electrode after 30 days of operation in a specific embodiment of the present invention.

[0034] Figure 3 This is the current density-time curve graph of the nickel-cobalt-sulfur / nickel mesh composite electrode under an applied voltage in a specific embodiment of the present invention;

[0035] Figure 4 This is the X-ray diffraction pattern of the nickel-cobalt-sulfur / nickel mesh composite electrode before and after operation in a specific embodiment of the present invention. Specific embodiments

[0036] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Refer Figure 1 As shown, the present invention discloses a method for evaluating the stability of an electrolytic water catalytic electrode under industrial conditions. The electrolytic water catalytic electrode includes a conductive substrate and a catalyst layer grown on the conductive substrate. The stability evaluation method includes:

[0038] S1. Evaluate the adhesion stability between the conductive substrate and the catalyst layer in the electrolytic water catalytic electrode and / or the intrinsic stability of the catalyst layer in the electrolytic water catalytic electrode. If the evaluation results of the adhesion stability and / or the intrinsic stability are qualified, perform step S2;

[0039] S2. Obtain the service life of the electrolytic water catalytic electrode under industrial conditions according to the dissolution amount of the electrolytic water catalytic electrode after working for a certain time under simulated industrial conditions.

[0040] The following further illustrates the present invention with specific embodiments.

[0041] The electrolytic water catalytic electrode in this embodiment is a nickel-cobalt-sulfur / nickel mesh composite electrode, including a nickel mesh and a nickel-cobalt-sulfur ternary composite material that uniformly grows on the nickel mesh and has an amorphous-crystalline structure. The nickel-cobalt-sulfur ternary composite material has a dense and porous coral-like structure. The initial surface morphology of the nickel-cobalt-sulfur / nickel mesh composite electrode refers Figure 2a As shown.

[0042] The method for evaluating the stability of the electrolytic water catalytic electrode under industrial conditions in this embodiment specifically includes:

[0043] S1. Evaluate the adhesion stability between the conductive substrate and the catalyst layer in the electrolytic water catalytic electrode and the intrinsic stability of the catalyst layer in the electrolytic water catalytic electrode. If the evaluation results of both the adhesion stability and the intrinsic stability are qualified, perform step S2;

[0044] S2. Based on the amount of dissolution of the water electrolysis catalytic electrode after working for a certain period of time under simulated industrial conditions, obtain the service life of the water electrolysis catalytic electrode under industrial conditions.

[0045] Specifically, the evaluation of the adhesion stability between the conductive substrate and the catalyst layer in the water electrolysis catalytic electrode includes:

[0046] Obtain the initial mass M0 of the catalyst layer in the water electrolysis catalytic electrode;

[0047] The mass of catalyst layer detachment, M, was obtained by ultrasonically vibrating the water electrolysis catalytic electrode or by bonding it with adhesive tape.

[0048] The adhesion stability of the water electrolysis catalytic electrode is obtained as X = M / M0.

[0049] Preferably, when ultrasonic oscillation is used, the oscillation power is 5W to 50W, the oscillation frequency is 20kHz to 100kHz, and the oscillation time is 2min to 30min.

[0050] After obtaining the adhesion stability X of the water electrolysis catalytic electrode, it can be compared with the preset adhesion stability threshold a to evaluate whether the adhesion stability of the water electrolysis catalytic electrode is qualified.

[0051] In this invention, if the adhesion stability X of the water electrolysis catalytic electrode is less than or equal to a, the adhesion stability assessment result is deemed acceptable; otherwise, the adhesion stability assessment result is deemed unacceptable.

[0052] In this embodiment, ultrasonic oscillation is used for testing and evaluation. The oscillation power is 15W, the oscillation frequency is 45kHz, and the oscillation time is 5min. The corresponding preset adhesion stability threshold 'a' is set to 10%. In other embodiments, different thresholds 'a' can be set for different process conditions.

[0053] The evaluation of the intrinsic stability of the catalyst layer in the water electrolysis catalytic electrode includes:

[0054] Based on the current density-time relationship of the water electrolysis catalytic electrode under simulated industrial conditions, the change in current density ΔJ over a certain time period is obtained, and the rate of change of current density Y = ΔJ / J0 is derived, where J0 is the initial current density; and,

[0055] Based on the X-ray diffraction patterns of the water electrolysis catalytic electrode before and after operating under simulated industrial conditions for a certain period of time, the angular change value Δ2θ of the X-ray diffraction peaks in the X-ray diffraction patterns was obtained; and,

[0056] According to the X-ray diffraction patterns of the electrolyzed water catalytic electrode before and after working for a certain period of time under simulated industrial conditions, the intensity change value ΔI of the X-ray diffraction peaks in the X-ray diffraction pattern is obtained, and the intensity change rate Z of the X-ray diffraction peaks is obtained as Z = ΔI / I0, where I0 is the X-ray diffraction intensity in the X-ray diffraction pattern before the electrolyzed water catalytic electrode works.

[0057] Among them, the current density-time relationship can reflect the performance decay of the catalytic electrode after long-term operation, so as to evaluate the corrosion resistance of the catalytic electrode. The X-ray diffraction pattern can characterize the crystallinity change of the catalytic electrode, so as to evaluate the influence of the crystallinity change on the stability.

[0058] The simulated industrial conditions in the present invention are as follows: the alkali content in the electrolyte is 3 mol / L to 10 mol / L, the electrolyte temperature is 50 °C to 98 °C, and the current density is 400 mA / cm 2 ~2000 mA / cm 2 , and the working time is 1 day to 360 days. Preferably, in this embodiment, the alkali in the electrolyte is KOH, the content is 5 mol / L, the electrolyte temperature is 70 °C, the current density is 500 mA / cm 2 , and the working time is 30 days. Refer Figure 2b The surface morphology of the nickel-cobalt-sulfur / nickel mesh composite electrode after working for 30 days is shown.

[0059] After obtaining the change rate Y of the current density, the angle change value Δ2θ of the X-ray diffraction peak, and the intensity change rate Z of the X-ray diffraction peak, compare them with the preset current density change rate threshold b, the preset angle change threshold c of the X-ray diffraction peak, and the preset intensity change rate threshold d of the X-ray diffraction peak respectively to evaluate whether the intrinsic stability of the electrolyzed water catalytic electrode is qualified.

[0060] In the present invention, if the change rate Y of the current density ≤ b, the angle change value Δ2θ of the X-ray diffraction peak ≤ c, and the intensity change rate Z of the X-ray diffraction peak ≤ d, it is determined that the evaluation result of the intrinsic stability is qualified; otherwise, the evaluation result of the intrinsic stability is unqualified.

[0061] For the simulated industrial conditions in this embodiment, the preset current density change rate threshold b is set to 10%, the preset angle change threshold c of the X-ray diffraction peak is set to 1°, and the preset intensity change rate threshold d of the X-ray diffraction peak is 10%. In other embodiments, different thresholds b, c, and d can be set for different simulated industrial conditions.

[0062] Refer Figure 3The figure shows the current density-time curve of the nickel-cobalt-sulfur / nickel mesh composite electrode under an applied voltage in this embodiment (the original electrode is marked before the test, and the electrode after 30 days of operation is marked after the test). It can be seen that the performance of water electrolysis changes regularly without obvious attenuation, reflecting good corrosion resistance and the stability of the positive electrode material. Specifically, the change rate Y of the current density is Y = ΔJ / J0 = 30 / 500 = 6% < 10%.

[0063] Refer Figure 4 The figure shows the X-ray diffraction patterns of the nickel-cobalt-sulfur / nickel mesh composite electrode before and after operation in this embodiment (the original electrode is marked before the test, and the electrode after 30 days of operation is marked after the test). The same characteristic peaks appear in the X-ray diffraction patterns. By comparison, it can be seen that the intrinsic substances of the electrode do not change after long-term operation, and the crystallinity also does not change significantly, which also reflects the stability of the catalyst.Specifically, the angular change value Δ2θ of the X-ray diffraction peak is Δ2θ = 0.5° < 1°, and the change rate Z of the intensity of the X-ray diffraction peak is Z = ΔI / I0 = 20 / 500 = 4% < 10%.

[0064] In the present invention, only when the evaluation results of the adhesion stability and the intrinsic stability are both qualified, the estimation of the service life in step S2 will be executed.

[0065] Among them, step S2 is specifically as follows:

[0066] Based on inductively coupled plasma emission spectroscopy, obtain the dissolution amount m of the catalyst layer in the water electrolysis catalytic electrode after working for a certain time T0 under simulated industrial conditions;

[0067] Obtain the service life of the water electrolysis catalytic electrode under industrial conditions as: T = (M0 / m) * T0, where M0 is the initial mass of the catalyst layer in the water electrolysis catalytic electrode.

[0068] The simulated industrial conditions in step S2 are the same as those in step S1, and will not be elaborated here.

[0069] In this embodiment, the nickel-cobalt-sulfur / nickel mesh composite electrode works in a certain solution for different times, and a certain solution is taken out for testing by inductively coupled plasma emission spectrometer method to obtain the inductively coupled plasma emission spectrum. The test results can show the dissolution amount of Ni and Co per unit volume in the catalyst, and then the service life of the electrode can be judged according to the dissolution time. 100 cm -2 Nickel-cobalt-sulfur / nickel mesh electrode (the catalyst mass is about 60 mg / cm 2The Ni-Co alloy catalyst (containing approximately 78% Ni) showed no activity degradation after 30 days of operation under industrial current density and a reverse corrosion current impact interrupted every 24 hours. Furthermore, after the test electrode operated in a 300 mL electrolyte solution for 15 and 30 days, 2 mL of the electrolyte was diluted to 25 mL. Inductively coupled plasma optical emission spectrometry (ICP-OES) analysis revealed Ni solubility of 0.248 and 0.511 ppm (1 ppm = 1 mg / L), respectively. This indicates that the Ni dissolution rate in the Ni-Co alloy catalyst exhibits a essentially linear relationship with time. Therefore, the dissolution time of Ni in the catalyst can be estimated as follows:

[0070]

[0071] It is evident that the electrode will completely dissolve in approximately 196.6 years. Assuming that the 10% Ni dissolution on the catalyst surface will not affect its porous structure and catalytic activity, the working life of the electrode catalytic material can be predicted to be as high as 19 years or more.

[0072] This invention comprehensively evaluates the adhesion stability and intrinsic stability of catalytic electrodes for water electrolysis under industrial conditions. Based on the satisfactory evaluation results, it predicts the time it takes for the electrode to operate stably under industrial conditions, providing guidance for industrial water electrolysis catalysts and contributing to their improvement and development.

[0073] As can be seen from the above technical solutions, the present invention has the following advantages:

[0074] Based on the evaluation of the adhesion stability and intrinsic stability of the water electrolysis catalytic electrode, this invention accurately predicts the service life of the catalytic electrode under industrial conditions. The evaluation method is simple and feasible, and can be widely applied in the field of industrial water electrolysis.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for evaluating stability of a water electrolysis catalyst electrode under industrial conditions, the water electrolysis catalyst electrode comprising an electrically conductive substrate and a catalyst layer grown on the electrically conductive substrate, characterized in that, The stability evaluation method comprises: S1, the adhesion stability between the conductive substrate and the catalyst layer in the water electrolysis catalyst electrode and the intrinsic stability of the catalyst layer in the water electrolysis catalyst electrode are evaluated, if the adhesion stability evaluation result and the intrinsic stability evaluation result are qualified, step S2 is executed; S2, the service life of the water electrolysis catalyst electrode under industrial conditions is obtained according to the dissolution amount of the water electrolysis catalyst electrode after working under simulated industrial conditions for a certain time; In the step S1, the adhesion stability between the conductive substrate and the catalyst layer in the water electrolysis catalyst electrode is evaluated, and the evaluation is specifically: The initial mass M0 of the catalyst layer in the water electrolysis catalyst electrode is obtained; The water electrolysis catalyst electrode is subjected to ultrasonic oscillation or adhesion by adhesive tape, and the falling mass M of the catalyst layer is obtained; The adhesion stability X of the water electrolysis catalyst electrode is M / M0; If the adhesion stability X of the water electrolysis catalyst electrode is less than or equal to a, it is determined that the adhesion stability evaluation result is qualified, otherwise, the adhesion stability evaluation result is unqualified, wherein a is a preset adhesion stability threshold; The intrinsic stability of the catalyst layer in the water electrolysis catalyst electrode is evaluated in the step S1, which comprises: According to the current density-time relationship of the water electrolysis catalyst electrode under simulated industrial conditions, the change value ΔJ of the current density within a certain time is obtained, and the change rate Y of the current density is obtained, Y=ΔJ / J0, wherein J0 is the initial current density; and / or, According to the X-ray diffraction patterns of the water electrolysis catalyst electrode before and after working under simulated industrial conditions for a certain time, the angle change value Δ2θ of the X-ray diffraction peak in the X-ray diffraction pattern is obtained; and / or, According to the X-ray diffraction patterns of the water electrolysis catalyst electrode before and after working under simulated industrial conditions for a certain time, the intensity change value ΔI of the X-ray diffraction peak in the X-ray diffraction pattern is obtained, and the intensity change rate Z of the X-ray diffraction peak is obtained, Z=ΔI / I0, wherein I0 is the X-ray diffraction intensity in the X-ray diffraction pattern before the water electrolysis catalyst electrode works; If the change rate Y of the current density is less than or equal to b, and / or, the angle change value Δ2θ of the X-ray diffraction peak is less than or equal to c, and / or, the intensity change rate Z of the X-ray diffraction peak is less than or equal to d, it is determined that the intrinsic stability evaluation result is qualified, otherwise, the intrinsic stability evaluation result is unqualified, wherein b is a preset current density change rate threshold, c is a preset X-ray diffraction peak angle change threshold, and d is a preset X-ray diffraction peak intensity change rate threshold; The simulated industrial conditions are: the alkali content in the electrolyte is 3 mol / L-10 mol / L, the electrolyte temperature is 50 DEG C-98 DEG C, the current density is 400 mA / cm 2 ~2000 mA / cm 2 , and the working time is 1 day-360 days. The step S2 is specifically: The dissolution amount m of the catalyst layer in the water electrolysis catalyst electrode after working under simulated industrial conditions for a certain time T0 is obtained based on inductively coupled plasma emission spectroscopy; The service life of the water electrolysis catalyst electrode under industrial conditions is T=(M0 / m)*T0, wherein M0 is the initial mass of the catalyst layer in the water electrolysis catalyst electrode.

2. The method for evaluating stability of a water electrolysis catalyst electrode under industrial conditions according to claim 1, characterized by, The preset adhesion stability threshold a is 10%.

3. The method of claim 1, wherein the method is characterized by: The oscillation power of the ultrasonic oscillation is 5W-50W, the oscillation frequency is 20kHz-100kHz, and the oscillation time is 2min-30min.

4. The method of claim 1, wherein the method is characterized by, The preset current density change rate threshold b is 10%, and / or the preset X-ray diffraction peak angle change threshold c is 1°, and / or the preset X-ray diffraction peak intensity change rate threshold d is 10%. The preset current density change rate threshold b is 10%, and / or the preset X-ray diffraction peak angle change threshold c is 1°, and / or the preset X-ray diffraction peak intensity change rate threshold d is 10%. The preset current density change rate threshold b is 10%, and / or the preset X-ray diffraction peak angle change threshold c is 1°, and / or the preset X-ray diffraction peak intensity change rate threshold d is 10%. The preset current density

Images