A type of NbTiVMoC3T x Preparation method of supported platinum catalyst and hydrogen evolution device for water electrolysis

Abstract

The application discloses a kind of NbTiVMoC3T x The application discloses a preparation method of a platinum-loaded catalyst and an electrolytic water hydrogen production device, and belongs to the technical field of electrolytic water hydrogen production.The application specifically relates to the following: NbTiVMoAlC3 is etched and intercalated into a few-layer MXene dispersion liquid of NbTiVMoC3T x , centrifugal washing is carried out to obtain a few-layer NbTiVMoC3T x powder, the powder is mixed with an aqueous chloroplatinic acid solution, and then hydrothermal reaction is carried out to obtain a platinum-loaded catalyst of NbTiVMoC3T x . According to the application, highly dispersed platinum-based active centers are in-situ loaded on the surface of a high-entropy MXene carrier, a high-performance, long-life and low-cost proton exchange membrane electrolytic water cathode catalyst is realized, and the application is especially suitable for commercial application.

Description

Technical Field

[0001] This invention belongs to the field of water electrolysis for hydrogen production technology, specifically relating to a NbTiVMoC3T x Preparation method of supported platinum catalyst and device for hydrogen evolution by water electrolysis. Background Technology

[0002] Against the backdrop of the global push for a "dual-carbon" strategy, developing clean and efficient hydrogen energy technologies has become a key path to achieving energy transition. Water electrolysis for hydrogen production can directly utilize renewable energy to produce high-purity "green hydrogen" with near-zero carbon emissions throughout the process, and is considered one of the most promising green hydrogen production methods. However, the large-scale commercial application of this technology is limited by its heavy reliance on the precious metal platinum for the cathode hydrogen evolution reaction catalyst. While platinum-based catalysts possess excellent catalytic activity, their high cost and limited global reserves severely restrict the widespread adoption of water electrolysis for hydrogen production.

[0003] To reduce dependence on platinum, current research mainly focuses on two strategies: one is to reduce platinum usage through nanostructure design; the other is to improve platinum atom utilization efficiency and stability by utilizing the strong metal-support interaction between the support material and platinum. Among them, two-dimensional transition metal carbides / nitrides are considered highly promising support materials due to their high conductivity, large specific surface area, and abundant surface functional groups. In particular, high-entropy MXenes, with their multi-metal synergistic effect, can endow the support with higher structural stability and tunable electronic properties, and are expected to achieve firm anchoring of platinum species and optimization of electronic structure, thereby simultaneously improving the activity and durability of catalysts. However, the preparation of existing high-entropy MXenes usually faces problems such as long etching processes and low monolayer yields, which limits their practical application and performance as catalyst supports. Summary of the Invention

[0004] To address the problems of high precious metal consumption, low atom utilization, insufficient stability at high current densities, and high cost of existing platinum-based acidic hydrogen evolution catalysts in proton exchange membrane water electrolyzers, this invention provides a NbTiVMoC3T catalyst. x The preparation method of the supported platinum catalyst and the water electrolysis hydrogen evolution device realize a high-performance, long-life, and low-cost proton exchange membrane water electrolysis cathode catalyst by in-situ loading highly dispersed platinum-based active centers on the surface of a high-yield, high-quality high-entropy MXene support, which is particularly suitable for commercial applications.

[0005] The technical solution adopted in this invention is as follows:

[0006] A type of NbTiVMoC3T x The preparation method of the supported platinum catalyst includes the following steps:

[0007] Step 1: The MAX phase powder of NbTiVMoAlC3 is etched and intercalated to obtain a few-layer NbTiVMoC3T x MXene dispersion;

[0008] Step 2, the few-layer NbTiVMoC3T x After stirring, centrifuging, and washing, the upper colloidal layer of the MXene dispersion was collected to obtain a few-layer NbTiVMoC3T x powder;

[0009] Step 3: Place the few-layer NbTiVMoC3T x The powder was dissolved in deionized water and mixed thoroughly with an aqueous solution of chloroplatinic acid. The resulting mixed solution A was subjected to hydrothermal reaction at 180°C for 30–60 min. After washing and freeze-drying, NbTiVMoC3T was obtained. x Supported platinum catalyst.

[0010] Furthermore, the specific etching process in step 1 is as follows:

[0011] The MAX phase powder of NbTiVMoAlC3 was added to a hydrofluoric acid solution and stirred continuously at 50℃~60℃ for 48~96 h to obtain a precursor solution by etching.

[0012] Furthermore, the hydrofluoric acid solution has a mass fraction of 48 wt%.

[0013] Furthermore, the mass-to-volume ratio of the NbTiVMoAlC3 MAX phase powder to the hydrofluoric acid solution is 0.08~1.2 g / mL.

[0014] Furthermore, the specific process of interpolation in step 1 is as follows:

[0015] The precursor solution was centrifuged, washed, and freeze-dried to obtain multilayer NbTiVMoC3T. x MXene powder was dissolved in deionized water and mixed with tetrabutylammonium hydroxide solution. The resulting mixed solution B was continuously stirred and intercalated. After washing, the upper colloidal solution was collected to obtain a few-layer NbTiVMoC3T x MXene dispersion.

[0016] Furthermore, the centrifugation speed is 7500-10000 rpm, and the duration is 3-6 min.

[0017] Furthermore, the freeze-drying temperature is -59°C, and the duration is 36~72 h.

[0018] Furthermore, the mixed solution B contains multiple layers of NbTiVMoC3T xThe concentration of MXene powder was 33.33 g / L.

[0019] Furthermore, the mass fraction of the tetrabutylammonium hydroxide solution is 54 wt% to 56 wt%.

[0020] Furthermore, the temperature of the stirring intercalation is 50℃~60℃, and the duration is 20~24 h.

[0021] Furthermore, the upper colloidal solution was collected by centrifugation at a speed of 3000-4000 rpm for 30-90 min.

[0022] Furthermore, in step 2, the stirring temperature is 50℃~60℃, and the stirring time is 18~24 h.

[0023] Furthermore, in the mixed solution A of step 3, the few-layer NbTiVMoC3T x The concentration of MXene was 2 mg / mL, and the concentration of chloroplatinic acid was 0.6835 mg / mL.

[0024] Furthermore, in step 3, the freeze-drying temperature is -59°C and the duration is 36~72 h.

[0025] This invention also proposes a proton exchange membrane-based water electrolysis hydrogen evolution device, specifically using the NbTiVMoC3T... x The supported platinum catalyst is used as the cathode working electrode.

[0026] Furthermore, the anode of the proton exchange membrane-based water electrolysis hydrogen evolution device is preferably a commercial iridium oxide catalyst, iridium black catalyst, or a mixture of iridium and ruthenium, and the proton exchange membrane is preferably a short-side-chain perfluorosulfonic acid membrane, a long-side-chain perfluorosulfonic acid membrane, or a commercially available non-fluorinated / hydrocarbon membrane.

[0027] Furthermore, the proton exchange membrane-based water electrolysis hydrogen evolution device is designed based on an H-type electrolyzer or a membrane electrode electrolyzer.

[0028] Furthermore, the proton exchange membrane-based water electrolysis hydrogen evolution device operates within a temperature range of 25°C to 80°C.

[0029] Furthermore, the proton exchange membrane-based water electrolysis hydrogen evolution device operates using a constant current method, with the applied anodic working current density being 0.1~1 amperes per square centimeter.

[0030] Furthermore, the water flow rate used in the proton exchange membrane-based water electrolysis hydrogen evolution device is 10~20 mL / min.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. This invention prepares a NbTiVMoC3T x The supported platinum catalyst has achieved a breakthrough synergistic optimization in catalytic activity, structural stability and cost control. Its comprehensive performance is significantly better than existing low platinum catalysts and most non-precious metal catalysts. It provides an innovative material solution and reliable theoretical design basis for proton exchange membrane water electrolysis technology to further reduce the dependence on precious metals and move towards low cost and high performance.

[0033] 2. Regarding cost control, the NbTiVMoC3T obtained in this invention... x While ensuring excellent performance, the supported platinum catalyst reduces the platinum loading at the cathode to an extremely low level (less than 0.1 mg / cm²). Compared with traditional commercial catalysts with high platinum loading, this invention has an order-of-magnitude advantage in raw material costs, significantly improving the economic efficiency and market competitiveness of the proton exchange membrane electrolyzer throughout its entire life cycle.

[0034] 3. Regarding stability, the NbTiVMoC3T obtained in this invention... x The supported platinum catalyst exhibits excellent durability, specifically achieving stable operation for over 4000 hours in acidic environments and at industrial-grade current densities up to 1 ampere per square centimeter, with extremely low degradation rate, fully meeting the stringent requirements for long-term catalyst durability in industrial applications.

[0035] 4. Regarding catalytic activity, the NbTiVMoC3T obtained in this invention... x The supported platinum catalyst exhibits excellent electrocatalytic performance in the acidic hydrogen evolution reaction. Specifically, in a 0.5 mol / L sulfuric acid electrolyte, it only requires an overpotential of 24 mV to reach a reference current density of 10 mA / cm², significantly improving the mass activity. This performance is comparable to or even better than that of commercial platinum-carbon catalysts, successfully achieving a breakthrough in high intrinsic activity with extremely low platinum loading.

[0036] 5. In terms of preparation process, this invention overcomes the problems of low yield and complicated steps in the traditional preparation method of high-entropy MXene. The etching, intercalation and loading process provided is clear, mild, and reproducible, and is easy to scale up. This simple and controllable synthesis method lays a solid industrial foundation for the large-scale preparation of catalysts and the commercial application of proton exchange membrane electrolyzers. Attached Figure Description

[0037] Figure 1 The NbTiVMoAlC3 and NbTiVMoC3T in Embodiment 1 of the present invention x and NbTiVMoC3T x X-ray diffraction image of -Pt;

[0038] Figure 2The NbTiVMoC3T obtained in Example 1 of this invention x -Pt and NbTiVMoC3T x Comparison of linear voltammetric scanning image performance;

[0039] Figure 3 The few-layer NbTiVMoC3T obtained in Example 1 of this invention x (a) Scanning electron microscope image of the powder and (b) cross-sectional image of the thin film, with the inset being NbTiVMoC3T. x Aberration-corrected scanning transmission electron microscope image;

[0040] Figure 4 The NbTiVMoC3T obtained in Example 1 of this invention x Elemental distribution of -Pt under spherical aberration corrected scanning transmission electron microscopy;

[0041] Figure 5 The NbTiVMoC3T obtained in Experimental Example 1 of this invention x Constant current stability test diagram of Pt in acidic water electrolysis and hydrogen evolution reaction in H-type electrolytic cell;

[0042] Figure 6 The NbTiVMoC3T obtained in Example 1 of this invention x A schematic diagram of a proton exchange membrane-based water electrolysis hydrogen evolution device constructed with Pt as the cathode working electrode.

[0043] Figure 7 This is a current density-voltage diagram of the hydrogen evolution reaction at 80°C in the proton exchange membrane-based water electrolysis device proposed in Embodiment 2 of the present invention.

[0044] Figure 8 The graph shows the constant current stability test of the hydrogen evolution reaction of water electrolysis based on the proton exchange membrane proposed in Embodiment 2 of the present invention at 80°C.

[0045] Figure 9 The NbTiVMoC3T etched for 76, 48, and 24 hours respectively in Examples 1, 3, and 4 of this invention. x X-ray diffraction pattern of the sample;

[0046] Figure 10 Nb4C3T obtained for Comparative Example 1 x -Pt linear scan voltammetric image;

[0047] Figure 11 The NbTiVMoC3T obtained in Example 5 of this invention x -Pt constant current stability test diagram of the hydrogen evolution reaction of water electrolysis at 25°C in a proton exchange membrane-based water electrolysis device. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0049] Example 1

[0050] This embodiment proposes an NbTiVMoC3T x The preparation method of the supported platinum catalyst includes the following steps:

[0051] Step 1: Mix 20 mL of 48 wt% hydrofluoric acid solution with 2 g of NbTiVMoAlC3 MAX phase powder evenly, and stir continuously in an oil bath at 55℃ for 96 h at a speed of 400 rpm. After the solution is cooled to room temperature, precursor solution A is obtained.

[0052] Step 2: The obtained precursor solution A was centrifuged and washed multiple times until neutral. The remaining suspension was freeze-dried at -59℃ for 48 h to obtain dried multilayer NbTiVMoC3 MXene powder.

[0053] Step 3: Dissolve 1.5 g of multilayer NbTiVMoC3 MXene powder in 45 ml of 54-56 wt% tetrabutylammonium hydroxide aqueous solution. Intercalate the mixture by stirring continuously at 55°C for 24 h. After washing, collect the upper colloidal solution by centrifugation at 3500 rpm for 1 h to obtain few-layer NbTiVMoC3T. x MXene dispersion;

[0054] Step 4: The obtained few-layer NbTiVMoC3T x The MXene dispersion was continuously stirred at 55°C for 24 h. After the solution cooled, it was washed repeatedly by centrifugation to obtain NbTiVMoC3T. x Separate from tetrabutylammonium hydroxide, take the upper colloidal solution to obtain a few-layer NbTiVMoC3T x Powder, designated as NbTiVMoC3T x ;

[0055] Step 5: Add 50 mg of NbTiVMoC3T x The powder was dissolved in 25 mL of deionized water and 13.67 mg of chloroplatinic acid was dissolved in 20 mL of water. The mixture was sonicated for 50 minutes until homogeneous to obtain precursor solution B.

[0056] Step 6: Place precursor solution B in a reaction vessel and react at 180 degrees Celsius for 30 minutes. After cooling, freeze-dry for 48 hours to obtain NbTiVMoC3T. x The supported platinum catalyst is designated as NbTiVMoC3T. x -Pt.

[0057] The following describes the NbTiVMoC3T obtained in this embodiment. x -Pt was used for structural characterization, and its catalytic performance in the acidic water electrolysis hydrogen evolution reaction was tested.

[0058] Figure 1 In this embodiment, NbTiVMoAlC3 and NbTiVMoC3T are used. x NbTiVMoC3T x X-ray diffraction pattern of Pt, showing NbTiVMoC3T x -Pt retains the original two-dimensional high-entropy MXene NbTiVMoC3T x The phase structure peaks, and also the diffraction peaks of Pt metal, indicate that Pt is supported on NbTiVMoC3T. x The nanoparticles are uniformly dispersed.

[0059] This embodiment tests the catalytic performance of the acidic water electrolysis and hydrogen evolution reaction in an H-type electrolyzer, specifically using the obtained NbTiVMoC3T x Pt was used as the working electrode, a commercial iridium oxide electrode as the counter electrode, and a mercury / mercurous sulfate electrode as the reference electrode. A 0.5 mol / L sulfuric acid aqueous solution was used as the electrolyte. The catalytic activity of the catalyst was tested using linear sweep voltammetry, and its stability was tested using a galvanostatic method. The catalytic activity and stability of the catalyst were analyzed based on data recorded by the electrochemical workstation.

[0060] Figure 2 The NbTiVMoC3T obtained in this embodiment x -Pt、NbTiVMoC3T x A comparison of the linear scanning voltammetric imaging performance shows that the high-entropy NbTiVMoC3T without Pt loading is evident. x The overpotential of the carrier at 10 mA / cm² is already 386 mV, while NbTiVMoC3T x The -Pt sample only had 24 millivolts, which indicates that NbTiVMoC3T x -Pt exhibits extremely superior hydrogen evolution performance.

[0061] After catalytic performance testing, the material was identified as NbTiVMoC3T. x-Pt was used as the working electrode for structural and compositional analysis of the catalyst. Aberration-corrected scanning transmission electron microscopy images of the catalyst are shown below. Figure 3 As shown, its component distribution was scanned.

[0062] Figure 3 The few-layer NbTiVMoC3T obtained in this embodiment x (a) Scanning electron microscope image of the powder and (b) cross-section of the thin film, with the inset being a few-layer NbTiVMoC3T x Aberration-corrected scanning transmission electron microscopy image of the powder indicates that NbTiVMoC3T x The film exhibits distinct stratification and large, thin-film shapes, confirming the successful preparation of high-quality, high-yield NbTiVMoC3T in this embodiment. x .

[0063] Figure 4 The NbTiVMoC3T obtained in this embodiment x The elemental distribution results of Pt obtained by aberration-corrected scanning transmission electron microscopy further confirmed that the white bright spots of Pt nanoparticles were uniformly dispersed in NbTiVMoC3T. x Surface, and NbTiVMoC3T x -Pt has a uniform elemental distribution.

[0064] Figure 5 The NbTiVMoC3T obtained in this embodiment x The constant-current stability test results of NbTiVMoC3T in an H-type electrolytic cell for the acidic water electrolysis and hydrogen evolution reaction show that it can still operate stably for more than 300 hours under industrial current density, indicating that NbTiVMoC3T x -Pt exhibits excellent structural stability, fully demonstrating its outstanding electrochemical stability and structural durability under high current and strong polarization conditions.

[0065] Example 2

[0066] This embodiment proposes a proton exchange membrane-based water electrolysis hydrogen evolution device, the structure of which is as follows: Figure 6 As shown, a membrane electrode configuration is specifically adopted, which includes, in sequence, a cathode plate, a waterproof gasket, and the NbTiVMoC3T obtained in Example 1. x -Pt is used as the cathode working electrode, perfluorosulfonic acid membrane is used as the proton exchange membrane, commercial iridium oxide electrode is used as the anode, gasket, anode plate.

[0067] Figure 7 The NbTiVMoC3T obtained in Example 1 x-Pt current density-voltage diagram of hydrogen evolution reaction in water electrolysis at 80℃ in a proton exchange membrane-based water electrolysis device. The current density range used is 0~1 ampere per square centimeter. It can be seen that when the device reaches a high current density of 100 and 1 ampere per square centimeter, the cell voltage of the electrolyzer is only 2.089 volts, showing excellent practical potential.

[0068] Figure 8 The NbTiVMoC3T obtained in Example 1 x The constant current stability test diagram of the hydrogen evolution reaction of water electrolysis at 80℃ in a proton exchange membrane-based water electrolysis device shows that the device can stably operate for 4000 hours at a current density of 1 ampere per square centimeter to produce hydrogen from water, demonstrating extremely superior stability.

[0069] Example 3

[0070] This embodiment proposes an NbTiVMoC3T x The preparation method of the supported platinum catalyst is the same as that in Example 1, except that the step of "continuous stirring in an oil bath at 55°C for 96 h" is changed to "continuous stirring in an oil bath at 55°C for 72 h". The other steps remain unchanged.

[0071] The NbTiVMoC3T obtained in this embodiment was subjected to electrolysis in an H-type electrolytic cell. x The catalytic performance of the supported platinum catalyst in the acidic water electrolysis hydrogen evolution reaction was tested under the same conditions as in Example 1.

[0072] Figure 9 The NbTiVMoC3T obtained in this embodiment x The X-ray diffraction pattern and normalized XRD pattern of the sample showed that the high-entropy MXene still retained the lattice diffraction peaks of the MAX phase after an etching time of 72 h, confirming that NbTiVMoC3T x The etching of the sample was successful.

[0073] Example 4

[0074] This embodiment proposes an NbTiVMoC3T x The preparation method of the supported platinum catalyst is the same as that in Example 1, except that the step of "continuous stirring in an oil bath at 55°C for 96 h" is changed to "continuous stirring in an oil bath at 55°C for 48 h". The other steps remain unchanged.

[0075] The NbTiVMoC3T obtained in this embodiment was subjected to electrolysis in an H-type electrolytic cell. x The catalytic performance of the supported platinum catalyst in the acidic water electrolysis hydrogen evolution reaction was tested under the same conditions as in Example 1.

[0076] Figure 9 The NbTiVMoC3T obtained in this embodiment x The X-ray diffraction pattern and normalized XRD pattern of the sample showed that the high-entropy MXene still retained the lattice diffraction peaks of the MAX phase after an etching time of 48 h, confirming that NbTiVMoC3T x The etching of the sample was successful.

[0077] Comparative Example 1

[0078] This comparative example prepared a low-entropy Nb4C3T x Supported platinum catalyst, denoted as Nb4C3T x -Pt, the preparation process differs from Example 1 in that the step 1 "uniformly mix 20 mL of 48wt% hydrofluoric acid solution with 2 g of NbTiVMoAlC3 MAX phase powder" is changed to "uniformly mix 20 mL of 48wt% hydrofluoric acid solution with 1 g of Nb4AlC3 MAX phase powder". The remaining steps remain unchanged.

[0079] The low-entropy Nb4C3T obtained in this comparative example was tested in an H-type electrolytic cell. x -Pt was subjected to linear voltammetric scanning tests, and the test conditions were the same as in Example 1.

[0080] Figure 10 The Nb4C3T obtained in this comparative example x The linear sweep voltammetric image of -Pt indicates that low-entropy Nb4C3T x -Pt at 10 mA·cm -2 The overpotential at this point is 34.7 mV, which is higher than that of NbTiVMoC3T. x -Pt 24 mV.

[0081] Example 5

[0082] This embodiment proposes a proton exchange membrane-based water electrolysis hydrogen evolution device, which has the same structure as Embodiment 2, except that the temperature of the water electrolysis hydrogen evolution reaction is adjusted to 25°C.

[0083] Figure 11 The NbTiVMoC3T obtained in Example 1 x -Pt is used in a proton exchange membrane-based water electrolysis hydrogen evolution device at 25°C to show the constant current stability of the water electrolysis hydrogen evolution reaction. The current density is set at 200 mA / cm², which shows that the device can electrolyze water to produce hydrogen for more than 7000 hours at 200 mA / cm².

[0084] It should be noted that this is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A type of NbTiVMoC3T x A method for preparing a supported platinum catalyst, characterized in that, Includes the following steps: Step 1: The MAX phase powder of NbTiVMoAlC3 is etched and intercalated to obtain a few-layer NbTiVMoC3T x MXene dispersion; Step 2, the few-layer NbTiVMoC3T x After stirring, centrifuging, and washing, the upper colloidal layer of the MXene dispersion was collected to obtain a few-layer NbTiVMoC3T x powder; Step 3: Place the few-layer NbTiVMoC3T x The powder was dissolved in deionized water and mixed thoroughly with an aqueous solution of chloroplatinic acid. The resulting mixed solution A was subjected to hydrothermal reaction at 180°C for 30–60 min. After washing and freeze-drying, NbTiVMoC3T was obtained. x Supported platinum catalyst.

2. The NbTiVMoC3T according to claim 1 x A method for preparing a supported platinum catalyst, characterized in that, The specific etching process in step 1 is as follows: The MAX phase powder of NbTiVMoAlC3 was added to a hydrofluoric acid solution and stirred continuously at 50℃~60℃ for 48~96 h to obtain a precursor solution by etching.

3. The NbTiVMoC3T according to claim 2 x A method for preparing a supported platinum catalyst, characterized in that, The mass-to-volume ratio of the NbTiVMoAlC3 MAX phase powder to the hydrofluoric acid solution is 0.08~1.2 g / mL, and the mass fraction of the hydrofluoric acid solution is 48 wt%.

4. The NbTiVMoC3T according to claim 2 x A method for preparing a supported platinum catalyst, characterized in that, The specific process of interpolation in step 1 is as follows: The precursor solution was centrifuged, washed, and freeze-dried to obtain multilayer NbTiVMoC3T. x MXene powder was dissolved in deionized water and mixed with tetrabutylammonium hydroxide solution. The resulting mixed solution B was continuously stirred and intercalated. After washing, the upper colloidal solution was collected to obtain a few-layer NbTiVMoC3T x MXene dispersion.

5. The NbTiVMoC3T according to claim 4 x A method for preparing a supported platinum catalyst, characterized in that, The freeze-drying temperature is -59°C and the duration is 36~72 h.

6. The NbTiVMoC3T according to claim 4 x A method for preparing a supported platinum catalyst, characterized in that, The mixed solution B contains multiple layers of NbTiVMoC3T x The concentration of MXene powder was 33.33 g / L, and the mass fraction of tetrabutylammonium hydroxide solution was 54 wt%~56 wt%.

7. The NbTiVMoC3T according to claim 4 x A method for preparing a supported platinum catalyst, characterized in that, In step 1, the stirring temperature is 50℃~60℃ and the stirring time is 20~24 h; in step 2, the stirring temperature is 50℃~60℃ and the stirring time is 18~24 h.

8. The NbTiVMoC3T according to claim 1 x A method for preparing a supported platinum catalyst, characterized in that, In step 3, the mixed solution A contains a few-layer NbTiVMoC3T x The concentration of MXene was 2 mg / mL, and the concentration of chloroplatinic acid was 0.6835 mg / mL; the freeze-drying temperature was -59℃, and the time was 36~72 h.

9. A proton exchange membrane-based water electrolysis hydrogen evolution device, characterized in that, The device is prepared using the method described in any one of claims 1 to 8 to obtain NbTiVMoC3T. x The supported platinum catalyst is used as the cathode working electrode.

10. The proton exchange membrane-based water electrolysis hydrogen evolution device according to claim 9, characterized in that, The device operates within a temperature range of 25℃ to 80℃.

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