A quasi-solid-based fuel cell platinum-based catalyst and a method for preparing the same
The preparation of platinum-based catalysts for fuel cells by a quasi-solid-phase method solves the problems of uneven particle size and excessive use of organic reagents in existing technologies. It enables precise control of nanoparticles and improves stability, thus promoting the commercial application of fuel cells.
Patent Information
- Application Number
- CN202610422661.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-01
- Publication Date
- 2026-06-23
AI Technical Summary
Existing methods for synthesizing platinum-based catalysts cannot precisely control the particle size of nanoparticles, resulting in low catalyst activity and Pt utilization. At the same time, the use of large amounts of organic reagents causes environmental pollution and high costs, hindering the commercialization of fuel cells.
A quasi-solid-phase method was used to prepare platinum-based catalysts for fuel cells. By mixing organic synthetic ligands, catalyst supports and platinum-based organic ligands in a low-boiling-point organic solvent, combined with rotary evaporation and high-temperature annealing, the size of nanoparticles was precisely controlled, reducing the use of organic solvents.
Precise microscopic control of platinum-based nanoparticles has been achieved, resulting in small particle size and high stability. This reduces raw material costs, improves catalyst activity and stability, and promotes the commercialization of fuel cells.
Smart Images
Figure CN122267219A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the semiconductor field, and mainly to a platinum-based catalyst for fuel cells based on a quasi-solid phase and its preparation method. Background Technology
[0002] To achieve my country's proposed "dual-carbon" goals, accelerating research into renewable energy technologies as alternatives to traditional fossil fuels is imperative. Hydrogen energy possesses excellent energy storage density (142 MJ / kg⁻¹). -1 Hydrogen can provide energy directly in fuel cells through chemical reactions, producing only water in the process. Therefore, hydrogen energy has become an indispensable part of future clean energy systems.
[0003] Hydrogen-oxygen fuel cells can effectively convert chemical energy into electrical energy, offering advantages such as high energy conversion efficiency and environmental friendliness, and show promising application prospects in energy conversion devices and heavy-duty truck drives. However, the oxygen reduction reaction (ORR) at the cathode of a fuel cell is relatively slow, requiring the use of catalysts to lower the activation energy barrier. Currently, platinum nanoparticles are among the most advanced ORR catalysts for fuel cells; however, their high cost and poor stability are significant obstacles to their commercialization. Therefore, improving catalyst stability is a crucial prerequisite for promoting the commercialization of fuel cells.
[0004] Currently, the main methods for synthesizing platinum-based catalysts are impregnation and sol-gel methods. Impregnation offers advantages such as simple process flow and low solvent usage; however, it cannot precisely control the particle size of nanoparticles, resulting in uneven nanoparticle size and significantly reduced overall catalyst activity and Pt utilization. The sol-gel method can control nanoparticle size by varying the amount of organic solvent used; however, it requires large amounts of organic reagents such as oleylamine, chloroform, and n-hexane, which not only pollute the environment but also significantly limit its large-scale commercialization due to high reagent costs.
[0005] Therefore, developing a new method for preparing platinum-based catalysts is of particular importance. Summary of the Invention
[0006] In view of the shortcomings of the prior art, the purpose of this application is to provide a quasi-solid phase-based platinum-based catalyst for fuel cells and its preparation method, which aims to prevent the aggregation of nanoparticles under high temperature conditions, achieve precise microscopic control of the size of platinum-based nanoparticles, and synthesize platinum-based nanoparticle materials with small particle size, good performance and high stability.
[0007] The technical solution of this application is as follows: A method for preparing a platinum-based catalyst for fuel cells based on a quasi-solid phase includes the following steps: Organic synthetic ligands, catalyst supports, and platinum-based organic ligands are mixed in a low-boiling-point organic solvent. The low-boiling-point organic solvent is then removed by rotary evaporation to obtain the pre-annealed precursor; The pre-annealed precursor is annealed at high temperature of 200-290°C for 1-10 hours in an argon atmosphere or an argon-hydrogen atmosphere to obtain the platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0008] The sol-gel method is a common approach for preparing nanomaterials, including quantum dots, metal or oxide nanoparticles. Its key characteristic is the control of particle nucleation and growth through the coordination of organic ligands and adsorption on different crystal planes, allowing for precise control of nanomaterials with varying shapes and highly uniform particle heights. However, a drawback is the need for large quantities of organic reagents, making it economical.
[0009] The quasi-solid phase method proposed in this application aims to simulate the sol-gel method with as little organic solvent as possible. In this application, the reaction precursors, including organometallic salts and surfactants / ligands / solvents such as oleylamine and oleic acid, are thinly coated on the surface of the support in a liquid state during the reaction, but the entire sample appears to be in a solid state. Therefore, this method is named the quasi-solid phase method.
[0010] The quasi-solid phase method essentially simulates the reaction environment of the sol-gel method (although with significant changes), while solving the problem of using large amounts of solvent. Furthermore, because the solution is actually a thin layer encapsulated on the support surface, some control strategies from the impregnation method are cleverly introduced. For example, the entire reaction process can be altered by introducing a reducing atmosphere.
[0011] In summary, the quasi-solid phase method of this application is a novel method that lies between the impregnation method (complete solid-phase reaction or gas-solid reaction) and the sol-gel method (liquid-phase preparation).
[0012] Furthermore, the pre-annealed precursor is annealed at high temperature of 255-265°C for 1-2 hours under an argon-hydrogen atmosphere to obtain the platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0013] Furthermore, in the argon-hydrogen atmosphere, the argon content is 90-99%.
[0014] Furthermore, when the organic synthetic ligand, the catalyst support, and the platinum-based organic ligand are mixed in the low-boiling-point organic solvent, other organic ligands are also mixed together.
[0015] Furthermore, according to parts by mass, the platinum-based organic ligand is 40-300 parts and the catalyst support is 50-300 parts.
[0016] When other organic ligands are included in the mixture, the other organic ligands are in quantities of 40-210 parts; The ratio of the platinum-based organic ligand to the organic synthetic ligand is 1 g: 5-27 mL.
[0017] Furthermore, the organic synthetic ligand includes one or more of the following: short-chain amines, short-chain acids, long-chain amines, long-chain acids, halogen-containing organic compounds, phosphorus-containing organic compounds, and sulfur-containing organic compounds. The catalyst support comprises one or more of the following: conductive carbon powder, cerium dioxide, titanium dioxide, titanium nitride, and titanium boride. The low-boiling-point organic solvent includes one or more of acetone, DMF, THF, hexane, chloroform, ethanol, and propanol; When mixed with other organic ligands, the other organic ligands are acetylacetone organometallic complexes.
[0018] Furthermore, the organic synthetic ligand is oleylamine or oleic acid; The catalyst support is conductive carbon powder; The low-boiling-point organic solvent is acetone; The platinum-based organic ligand is platinum acetylacetonate; When other organic ligands are mixed together and the other organic ligands are acetylacetone metal-organic complexes, the acetylacetone metal-organic complexes include one or more of cobalt acetylacetone, nickel acetylacetone, iron acetylacetone, ruthenium acetylacetone, etc.
[0019] Furthermore, the volume ratio of the oleylamine to the oleic acid is 4-11:1.
[0020] This application also provides a platinum-based catalyst for fuel cells based on a quasi-solid phase.
[0021] Furthermore, the size of the nanoparticles is 2-10 nm.
[0022] Furthermore, the size of the nanoparticles is 2-4 nm.
[0023] From the perspective of active sites, when the nanoparticle size is reduced to 2-4 nm, the specific surface area increases significantly, resulting in more active sites exposed on the catalyst surface. In the ORR (Organic Reduction) of fuel cells, active sites are crucial for the adsorption and reduction reactions of oxygen molecules. More active sites can simultaneously adsorb more oxygen molecules, accelerating the reaction rate, enhancing catalyst activity, and leveraging the high activity advantage of platinum-based catalysts.
[0024] In terms of stability, 2-4 nm particles have high surface energy, tend to maintain a stable structure, resist the influence of external factors, maintain stable crystal structure and chemical properties, and are firmly attached, making them less prone to agglomeration and detachment. This application effectively improves the stability of platinum-based catalysts for fuel cells based on quasi-solid phases, extends their service life, and provides a guarantee for the commercialization of fuel cells.
[0025] Compared with the prior art, this application has the following beneficial effects: 1. Existing sol-gel methods require a large amount of organic reagents in synthesis, which are expensive and pollute the environment, hindering large-scale commercial applications. Compared with the sol-gel method, the quasi-solid phase method of this application greatly reduces the amount of organic reagents used in the synthesis process, lowers raw material costs, and is conducive to large-scale commercialization.
[0026] 2. Existing impregnation methods cannot precisely control the particle size of nanoparticles, resulting in low overall activity and Pt utilization of the synthesized catalysts. However, the quasi-solid-phase method provided in this application can precisely control the size of the synthesized platinum-based nanoparticles, resulting in catalyst materials with small particle size, good performance, and high stability. Attached Figure Description
[0027] Figure 1 The images show the XRD patterns of the platinum-ruthenium nanoparticles prepared in Examples 1-4 of this application.
[0028] Figure 2 This is a TEM image of the platinum-ruthenium nanoparticles prepared in Example 4 of this application.
[0029] Figure 3 This is a TEM image of the platinum nanoparticles prepared in Comparative Example 1 of this application.
[0030] Figure 4 This is a TEM image of the platinum nanoparticles prepared in Example 5 of this application.
[0031] Figure 5 This is a TEM image of the platinum-cobalt nanoparticles prepared in Example 6 of this application.
[0032] Figure 6 This is a TEM image of the platinum-nickel nanoparticles prepared in Example 7 of this application.
[0033] Figure 7 This is a TEM image of the platinum-iron nanoparticles prepared in Example 8 of this application.
[0034] Figure 8 This is a comparison of the ORR curves of the platinum nanoparticles prepared in Example 5 of this application and the commercial platinum-carbon catalyst (JM40). Detailed Implementation
[0035] This application provides a quasi-solid phase-based platinum-based catalyst for fuel cells and its preparation method. To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following provides a more detailed description. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0036] This application provides a method for preparing a platinum-based catalyst for fuel cells based on a quasi-solid phase, comprising the following steps: Step 1: The organic synthetic ligand, catalyst support, platinum-based organic ligand, and other organic ligands are ultrasonically mixed in a low-boiling-point organic solvent.
[0037] According to the mass fractions, the platinum-based organic ligands are 40-300 parts, the catalyst support is 50-300 parts, and other organic ligands are 40-210 parts.
[0038] Furthermore, according to mass parts, the platinum-based organic ligands are 285-295 parts, the catalyst support is 195-205 parts, and other organic ligands are 195-205 parts.
[0039] The ratio of platinum-based organic ligands to organic synthetic ligands is 1 g: 5-27 mL.
[0040] Preferably, the ratio of platinum-based organic ligand to organic synthetic ligand is 1g:5-7mL.
[0041] Furthermore, the ratio of platinum-based organic ligands to organically synthesized ligands is 1 g: 5.85 mL.
[0042] There are no strict requirements on the amount of low-boiling-point organic solvent used, as long as it can completely dissolve the solvent.
[0043] Organic synthetic ligands include one or more of the following: short-chain amines, short-chain acids, long-chain amines, long-chain acids, halogenated organic compounds, phosphorus-containing organic compounds, and sulfur-containing organic compounds.
[0044] The preferred organic synthesis ligands are oleylamine and oleic acid.
[0045] The volume ratio of oleylamine to oleic acid is 4-11:1.
[0046] The preferred volume ratio of oleylamine to oleic acid is 5:1.
[0047] The catalyst support includes one or more of the following: conductive carbon powder, cerium dioxide, titanium dioxide, titanium nitride, and titanium boride.
[0048] The catalyst support is preferably conductive carbon powder.
[0049] Low-boiling-point organic solvents include one or more of the following: acetone, DMF, THF, hexane, chloroform, ethanol, and propanol.
[0050] Acetone is preferred as a low-boiling-point organic solvent.
[0051] The platinum-based organic ligand is preferably platinum acetylacetonate.
[0052] Other organic ligands are preferably acetylacetone-organometallic complexes.
[0053] Acetylacetone organometallic complexes include one or more of cobalt acetylacetone, nickel acetylacetone, iron acetylacetone, and ruthenium acetylacetone.
[0054] Other organic ligands are not essential and are added for further optimization.
[0055] For ultrasonic mixing, continue mixing until the solution becomes clear.
[0056] Preferably, the ultrasonic power is 250-350W and the ultrasonic water temperature is below 40℃.
[0057] Step 2: Remove the low-boiling-point organic solvent from the material in Step 1 by rotary evaporation to obtain the pre-annealed precursor.
[0058] Step 3: Anneal the pre-annealed precursor at 200-290℃ for 1-10 hours in an argon atmosphere or an argon-hydrogen atmosphere, and remove it after natural cooling to room temperature.
[0059] After washing with n-hexane multiple times, the catalyst was dried to obtain a platinum-based fuel cell catalyst based on a quasi-solid phase.
[0060] Preferably, the annealing is carried out at a high temperature of 255-265℃ for 1-2 hours under an argon-hydrogen atmosphere.
[0061] Preferably, in the argon-hydrogen atmosphere, the argon content is 90-99%.
[0062] The quasi-solid phase method of this application can prevent the aggregation of nanoparticles under high temperature conditions, and achieve precise microscopic control of the size of platinum-based nanoparticles. The synthesized platinum-based nanoparticle materials have small particle size, high order, good performance and high stability.
[0063] The present application will be further described below through specific embodiments.
[0064] Example 1 Add 54 mg of platinum acetylacetone and 54 mg of ruthenium acetylacetone to a flask, then add 0.8 ml of oleylamine, 0.08 ml of oleic acid, and 20 ml of acetone in sequence. Sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another h.
[0065] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0066] The pre-annealed precursor was annealed at 230°C for 1 hour under an argon atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0067] After drying, platinum-ruthenium nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0068] Example 2 Add 54 mg of platinum acetylacetone and 54 mg of ruthenium acetylacetone to a flask, then add 1.0 ml of oleylamine, 0.12 ml of oleic acid and 20 ml of acetone in sequence. Sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another h.
[0069] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0070] The pre-annealed precursor was annealed at 230°C for 2 hours under an argon atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0071] After drying, platinum-ruthenium nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0072] Example 3 Add 54 mg of platinum acetylacetone and 54 mg of ruthenium acetylacetone to a flask, then add 1.2 ml of oleylamine, 0.12 ml of oleic acid and 20 ml of acetone in sequence. Sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another h.
[0073] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0074] The pre-annealed precursor was annealed at 260°C for 2 hours under an argon atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0075] After drying, platinum-ruthenium nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0076] Example 4 Add 54 mg of platinum acetylacetone and 54 mg of ruthenium acetylacetone to a flask, then add 1.2 ml of oleylamine, 0.24 ml of oleic acid and 20 ml of acetone in sequence. Sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another h.
[0077] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0078] The pre-annealed precursor was annealed at 260°C for 2 hours under an argon-hydrogen atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0079] After drying, platinum-ruthenium nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0080] Comparative Example 1 Add 287 mg of platinum acetylacetonate to a flask, add 20 ml of acetone, sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another 1 h.
[0081] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0082] The pre-annealed precursor was annealed at 260°C for 2 hours under an argon-hydrogen atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0083] After drying, platinum nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0084] Example 5 Add 287 mg of platinum acetylacetonate to a flask, then add 1.4 ml of oleylamine, 0.24 ml of oleic acid, and 20 ml of acetone in sequence. Sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another h.
[0085] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0086] The pre-annealed precursor was annealed at 260°C for 2 hours under an argon-hydrogen atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0087] After drying, platinum nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0088] Example 6 Add 287 mg of platinum acetylacetonate and 200 mg of cobalt acetylacetonate to a flask, then add 1.4 ml of oleylamine, 0.28 ml of oleic acid and 20 ml of acetone in sequence. Sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another h.
[0089] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0090] The pre-annealed precursor was annealed at 260°C for 2 hours under an argon-hydrogen atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0091] After drying, platinum-cobalt nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0092] Example 7 Add 287 mg of platinum acetylacetonate and 200 mg of nickel acetylacetonate to a flask, then add 1.6 ml of oleylamine, 0.28 ml of oleic acid and 20 ml of acetone in sequence. Sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another h.
[0093] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0094] The pre-annealed precursor was annealed at 260°C for 2 hours under an argon-hydrogen atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0095] After drying, platinum-nickel nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0096] Example 8 Add 287 mg of platinum acetylacetonate and 200 mg of iron acetylacetonate to a flask, then add 1.6 ml of oleylamine, 0.32 ml of oleic acid and 20 ml of acetone in sequence. Sonicate for 10 min until the solution is clear, then add 200 mg of conductive carbon powder and sonicate for another h.
[0097] The acetone was then removed by rotary evaporation to obtain the pre-annealed precursor.
[0098] The pre-annealed precursor was annealed at 260°C for 2 hours under an argon-hydrogen atmosphere, then naturally cooled to room temperature and removed, and washed three times with n-hexane.
[0099] After drying, platinum-iron nanoparticle catalyst material is obtained, which is a platinum-based catalyst for fuel cells based on the quasi-solid phase.
[0100] Figure 1 XRD patterns of platinum-ruthenium nanoparticles prepared in Examples 1-4. (Refer to...) Figure 1 As can be seen, the synthesized materials, calculated using the Scherrer equation, all have particle sizes below 3 nm. Furthermore, the sample synthesized under an argon atmosphere at 230°C exhibits two peaks near 40°C, indicating a relatively low degree of platinum-ruthenium alloying, with peak positions close to those on the standard platinum card. With increasing annealing temperature, at 260°C, the peak positions appear to merge, and the main peak shifts to the right, indicating enhanced alloying of ruthenium and platinum.
[0101] The actual loads determined based on ICP and TGA are detailed in Table 1.
[0102] Table 1
[0103] As shown in Table 1, both increasing the holding time and annealing temperature can increase the loading to some extent, but the effect is not as good as using a reducing gas. Through exploration of temperature and atmosphere, argon-hydrogen at 260 degrees Celsius was selected as the preferred method for synthesizing high-loading platinum-ruthenium catalysts.
[0104] Figure 2 This is a TEM image of the platinum-ruthenium nanoparticles prepared in Example 4. Figure 3 The image shows a TEM image of the platinum nanoparticles prepared in Comparative Example 1. Figure 4 This is a TEM image of the platinum nanoparticles prepared in Example 5. Figure 5 The image shows a TEM image of the platinum-cobalt nanoparticles prepared in Example 6. Figure 6 This is a TEM image of the platinum-nickel nanoparticles prepared in Example 7. Figure 7 This is a TEM image of the platinum-iron nanoparticles prepared in Example 8.
[0105] pass Figures 3-4 It can be seen that when oleylamine and oleic acid are not added to the precursor solution, the prepared nanoparticles exhibit obvious agglomeration, with particles larger than 5 nm and uneven distribution. When oleylamine and oleic acid are added to the precursor solution, the prepared nanoparticles do not agglomerate and are very uniformly dispersed on the carbon support, indicating that oleylamine and oleic acid play a key role in the material preparation process.
[0106] pass Figures 4-7 It can be seen that the prepared nanoparticles have a particle size distribution between 2-4 nm and are very uniformly dispersed on the carbon support, without any particle agglomeration.
[0107] Figure 8 This is a comparison of the ORR curves of the platinum nanoparticles prepared in Example 5 and the commercial platinum-carbon catalyst (JM40).
[0108] Depend on Figure 8 It can be seen that, compared with JM40, the mass activity of platinum nanoparticles reached 600 mg. pt / cm -2 420mg higher than JM40 pt / cm -2 This indicates that the platinum nanoparticle catalyst material synthesized using the quasi-solid phase method has excellent electrochemical performance.
[0109] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of this application.
Claims
1. A method for preparing a platinum-based catalyst for fuel cells based on a quasi-solid phase, characterized in that, Includes the following steps: Organic synthetic ligands, catalyst supports, and platinum-based organic ligands are mixed in a low-boiling-point organic solvent. The low-boiling-point organic solvent is removed to obtain a pre-annealed precursor; The pre-annealed precursor is annealed at high temperature of 200-290°C for 1-10 hours in an argon atmosphere or an argon-hydrogen atmosphere to obtain the platinum-based catalyst for fuel cells based on the quasi-solid phase.
2. The method for preparing a platinum-based fuel cell catalyst based on a quasi-solid phase according to claim 1, characterized in that, The pre-annealed precursor is annealed at high temperature of 255-265°C for 1-2 hours under an argon-hydrogen atmosphere to obtain the platinum-based catalyst for fuel cells based on the quasi-solid phase.
3. The method for preparing a platinum-based fuel cell catalyst based on a quasi-solid phase according to claim 1, characterized in that, In the argon-hydrogen atmosphere, the argon content is 90-99%.
4. The method for preparing a platinum-based fuel cell catalyst based on a quasi-solid phase according to claim 1, characterized in that, When the organic synthetic ligand, the catalyst support, and the platinum-based organic ligand are mixed in the low-boiling-point organic solvent, other organic ligands are also mixed together.
5. The method for preparing a platinum-based fuel cell catalyst based on a quasi-solid phase according to claim 1, characterized in that, The platinum-based organic ligand comprises 40-300 parts by weight, and the catalyst support comprises 50-300 parts by weight. When other organic ligands are included in the mixture, the other organic ligands are in quantities of 40-210 parts; The ratio of the platinum-based organic ligand to the organic synthetic ligand is 1 g: 5-27 mL.
6. The method for preparing a platinum-based fuel cell catalyst based on a quasi-solid phase according to claim 1, characterized in that, The organic synthetic ligands include one or more of the following: short-chain amines, short-chain acids, long-chain amines, long-chain acids, halogen-containing organic compounds, phosphorus-containing organic compounds, and sulfur-containing organic compounds. The catalyst support comprises one or more of the following: conductive carbon powder, cerium dioxide, titanium dioxide, titanium nitride, and titanium boride. The low-boiling-point organic solvent includes one or more of acetone, DMF, THF, hexane, chloroform, ethanol, and propanol; When mixed with other organic ligands, the other organic ligands are acetylacetone organometallic complexes.
7. The method for preparing a platinum-based fuel cell catalyst based on a quasi-solid phase according to claim 1, characterized in that, The organic synthetic ligands are oleylamine and oleic acid; The catalyst support is conductive carbon powder; The low-boiling-point organic solvent is acetone; The platinum-based organic ligand is platinum acetylacetonate; When other organic ligands are mixed together and the other organic ligands are organometallic acetylacetone complexes, the organometallic acetylacetone complexes include one or more of cobalt acetylacetone, nickel acetylacetone, iron acetylacetone, and ruthenium acetylacetone.
8. The method for preparing a platinum-based fuel cell catalyst based on a quasi-solid phase according to claim 7, characterized in that, The volume ratio of the oleylamine to the oleic acid is 4-11:
1.
9. A quasi-solid phase-based platinum-based fuel cell catalyst prepared by the method for preparing a quasi-solid phase-based fuel cell platinum-based catalyst according to any one of claims 1-8.
10. The platinum-based fuel cell catalyst based on quasi-solid phase according to claim 9, characterized in that, The size of the nanoparticles is 2-10 nm.