Platinum nanoparticle / cerium oxide catalyst as well as preparation method and application thereof

Abstract

The invention discloses a platinum nanoparticle / cerium oxide catalyst as well as a preparation method and application thereof. The platinum nanoparticle / cerium oxide catalyst comprises platinum nanoparticles and cerium oxide nanosheets, the platinum nanoparticles grow in situ and are uniformly distributed on the cerium oxide nanosheets, and the platinum nanoparticle / cerium oxide catalyst has an icosahedron structure. The preparation method comprises the following steps: reacting a mixed reaction system containing a platinum-containing metal precursor, a cerium-containing metal precursor, a surfactant, a reducing agent and a solvent to prepare the platinum nanoparticle / cerium oxide catalyst. The preparation method is simple and convenient in process and easy to operate, the prepared platinum nanoparticle / cerium oxide catalyst is high and stable in catalytic efficiency and high in toxicity resistance when serving as a methanol oxidation catalyst, the problems that an existing precious metal platinum catalyst is high in cost, not ideal in activity and poor in stability can be effectively solved, and the catalyst is suitable for industrial production. The catalyst can be widely applied to catalytic methanol oxidation reaction.

Description

Technical Field

[0001] The invention belongs to the field of catalysts, and in particular relates to a platinum nanoparticle / cerium oxide catalyst and a preparation method and application thereof. Background Art

[0002] Direct alcohol fuel cells (DAFCs) are gaining increasing attention as portable power sources because they have some indisputable advantages over similar devices fueled by hydrogen, such as methanol, ethanol, ethylene glycol, and glycerol, which have high volumetric energy density and are much easier to store and transport than hydrogen. On the other hand, the oxidation kinetics of alcohols are relatively slow. Platinum-based electrocatalysts are required to drive methanol anodic oxidation electrocatalysis (MOR), but in practical applications, there are still disadvantages of high cost of precious metal catalysts, susceptibility to intermediate adsorption poisoning, slow kinetics, and poor activity / stability, which will greatly limit the application of platinum catalysts in direct methanol fuel cells. Based on industrial and economic considerations, it is urgent to develop efficient and stable platinum-based precious metal catalysts to catalyze alcohol anodic oxidation electrocatalysis. Summary of the invention

[0003] The main purpose of the present invention is to provide a platinum nanoparticle / cerium oxide catalyst and a preparation method and application thereof, so as to overcome the shortcomings of the prior art.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes: One aspect of the present invention provides a platinum nanoparticle / cerium oxide catalyst, which comprises platinum nanoparticles and cerium oxide nanosheets. The platinum nanoparticles are in-situ grown and uniformly distributed on the cerium oxide nanosheets. The platinum nanoparticle / cerium oxide catalyst has an icosahedral structure.

[0005] Furthermore, the content of platinum nanoparticles in the platinum nanoparticle / cerium oxide catalyst is 12-83 wt%.

[0006] Another aspect of the present invention provides a method for preparing a platinum nanoparticle / cerium oxide catalyst, which comprises: reacting a mixed reaction system comprising a platinum-containing metal precursor, a cerium-containing metal precursor, a surfactant, a reducing agent and a solvent to prepare the platinum nanoparticle / cerium oxide catalyst.

[0007] Another aspect of the present invention provides a platinum nanoparticle / cerium oxide catalyst prepared by the preparation method.

[0008] Another aspect of the present invention provides use of the platinum nanoparticle / cerium oxide catalyst in catalyzing methanol oxidation reaction.

[0009] Compared with the prior art, the present invention has at least the following beneficial effects: (1) The present invention adopts a one-pot simple wet chemical method to prepare platinum nanoparticles / cerium oxide catalysts. The synthesis method is simple, convenient and easy to operate.

[0010] (2) The platinum nanoparticle / cerium oxide catalyst prepared by the present invention can greatly improve the utilization efficiency of the active sites on the catalyst surface area, and remain stable in the alcohol oxidation catalytic system, and is not easily susceptible to the harm of intermediate adsorption poisoning, thereby improving the anti-poisoning ability in the alcohol oxidation process, so that alcohol fuel cells can greatly convert chemical energy into electrical energy, effectively promoting the development and utilization of alcohol fuel cells, opening up new ideas in the field of catalysts, and providing a new way to solve the contemporary energy crisis and environmental pollution.

[0011] (3) Compared with the commercial platinum-carbon catalysts commonly used on the market, the platinum nanoparticle / cerium oxide catalyst of the present invention not only has higher catalytic activity and stability for alcohol oxidation, but also reduces the cost of the catalyst. It can be used as an anode catalyst in DAFCs, which is conducive to further promoting the industrial application of direct alcohol fuel cells and promoting the commercial application of DAFCs in the field of mobile batteries. Moreover, the platinum nanoparticle / cerium oxide catalyst not only greatly accelerates the alcohol oxidation kinetics, but also reduces the catalyst toxicity, which is conducive to further large-scale research on alcohol oxidation technology.

[0012] (4) The structural certainty of Pt nanoparticles / cerium oxide not only makes the catalytic active center of Pt nanoparticles / cerium oxide catalysts very clear, but also makes the active sites for alcohol oxidation more specific, which is superior to commercial catalysts. This is of great significance for the efficient oxidation of alcohols and obtaining high-performance electrocatalysts with excellent durability for DMFCs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a product picture of icosahedral platinum nanoparticles / cerium oxide catalyst prepared in Example 1 of the present invention; Figure 2 is an XRD pattern of the icosahedral platinum nanoparticle / cerium oxide catalyst prepared in Example 1 of the present invention; Figure 3 is a low-magnification transmission electron microscopy image of the icosahedral platinum nanoparticle / cerium oxide catalyst prepared in Example 1 of the present invention; Figure 4is a high-magnification transmission electron microscopy image of the icosahedral platinum nanoparticle / cerium oxide catalyst prepared in Example 1 of the present invention; Figure 5 The figures are a graph showing the catalytic methanol oxidation data of icosahedral platinum nanoparticles / cerium oxide catalysts prepared in some typical embodiments of the present invention and commercial platinum-carbon catalysts. DETAILED DESCRIPTION

[0015] In view of the above problems existing in the prior art, the inventors of the present invention have conducted extensive and in-depth research and provide a platinum nanoparticle / cerium oxide catalyst and a preparation method and application thereof.

[0016] The technical solution, its implementation process and principle will be further explained as follows.

[0017] As one aspect of the technical solution of the present invention, a platinum nanoparticle / cerium oxide catalyst is provided, comprising platinum nanoparticles and cerium oxide nanosheets, wherein the platinum nanoparticles are in-situ grown and uniformly distributed on the cerium oxide nanosheets, and the platinum nanoparticle / cerium oxide catalyst has an icosahedral structure.

[0018] In some embodiments, the content of platinum nanoparticles in the platinum nanoparticle / cerium oxide catalyst is 12-83 wt %.

[0019] In some embodiments, the particle size of the platinum nanoparticles is 14-18 nm.

[0020] In some embodiments, the platinum nanoparticles have an icosahedral structure.

[0021] In some embodiments, the cerium oxide nanosheet has a length of 40-100 nm, a width of 40-100 nm, and a sheet thickness of 5-7 nm.

[0022] As another aspect of the technical solution of the present invention, a method for preparing a platinum nanoparticle / cerium oxide catalyst is provided, comprising: reacting a mixed reaction system comprising a platinum-containing metal precursor, a cerium-containing metal precursor, a surfactant, a reducing agent and a solvent to prepare the platinum nanoparticle / cerium oxide catalyst.

[0023] In some embodiments, the mass ratio of the platinum-containing metal precursor, the cerium-containing metal precursor, the surfactant and the reducing agent is (2.09-10): (2.78-12.38): (30-90): (30-90).

[0024] In some embodiments, the reaction temperature is 100-200° C. and the reaction time is 4-12 hours.

[0025] In some embodiments, the platinum-containing metal precursor includes at least any one of platinum acetylacetonate, hexachloroplatinic acid, potassium chloroplatinite, sodium chloroplatinite, potassium chloroplatinate, chloroplatinic acid, platinum dichloride, platinum tetrachloride, etc., but is not limited thereto.

[0026] In some embodiments, the cerium-containing metal precursor includes at least any one of cerium acetylacetonate, cerium nitrate, cerium chloride, cerium sulfate, etc., but is not limited thereto.

[0027] In some embodiments, the reducing agent includes at least any one of ascorbic acid, glucose, sodium borohydride, tungsten hexacarbonyl, etc., but is not limited thereto.

[0028] In some embodiments, the surfactant includes at least any one of hexadecyltrimethylammonium chloride, ammonium bromide, hexadecyltrimethylammonium bromide, etc., but is not limited thereto.

[0029] In some embodiments, the solvent includes at least any one of oleylamine, oleic acid, octadecene, etc., but is not limited thereto.

[0030] In some more specific embodiments, the preparation method further comprises: centrifuging the product obtained from the reaction.

[0031] In some more specific embodiments, the preparation method further comprises: adding the solid obtained by the centrifugal treatment to a mixed solution containing a carbon carrier, loading the solid on the carbon carrier, and preparing the platinum nanoparticle / cerium oxide catalyst after centrifugation and drying.

[0032] In some embodiments, the carbon carrier includes at least any one of carbon black, carbon nanotubes, acetylene carbon, graphite carbon, Ketjen black, etc., but is not limited thereto.

[0033] In some embodiments, the mass ratio of the solid to the carbon carrier is 1:3 to 1:2.

[0034] In some embodiments, the drying temperature is 60-70° C., and the drying time is 10-12 hours.

[0035] In some more specific embodiments, the preparation method may include the following steps: The platinum-containing metal precursor, the cerium-containing metal precursor, the surfactant, the reducing agent and the solvent are uniformly mixed, and the mixture is heated in an oil bath at 100 to 200° C. and refluxed for 4 to 12 hours to obtain a reaction product; Adding cyclohexane and ethanol to the product obtained by the reaction and subjecting it to centrifugal treatment, removing the supernatant, and dispersing the solid obtained by the centrifugal treatment in cyclohexane; The solid dispersed in cyclohexane is added to an ethanol solution containing a carbon carrier and ultrasonicated to load the solid on the carbon carrier. The solid is then centrifuged and dried at 60-70° C. for 10-12 hours to prepare the platinum nanoparticle / cerium oxide catalyst.

[0036] As another aspect of the technical solution of the present invention, it also provides a platinum nanoparticle / cerium oxide catalyst prepared by the preparation method.

[0037] The platinum nanoparticle / cerium oxide catalyst of the present invention has a unique icosahedral structure, which not only provides more catalytic active sites for the adsorption and dissociation of the reactant methanol during the methanol oxidation process, thereby improving its electrocatalytic activity, but also plays a key role in its structural stability in the electrocatalytic reaction due to the in-situ growth on the cerium oxide nanosheet film; at the same time, the metal-carrier strong interaction between platinum and cerium oxide causes the oxygen vacancies and adsorbed oxygen concentration around the catalytic active sites to increase, accelerating the conversion of CO to CO2, thereby greatly avoiding the adsorption of the toxic intermediate CO. Compared with commercial platinum-carbon (Pt / C) catalysts, the platinum nanoparticle / cerium oxide catalyst of the present invention not only greatly accelerates the alcohol oxidation kinetics, but also reduces the catalyst toxicity, which is conducive to further large-scale research on alcohol oxidation technology.

[0038] As another aspect of the technical solution of the present invention, it also provides the use of the platinum nanoparticle / cerium oxide catalyst in catalyzing methanol oxidation reaction.

[0039] In some preferred embodiments, the application includes application in alcohol fuel cells.

[0040] In some preferred embodiments, the application includes application in anode oxidation electrocatalysis of alcohol fuel cells.

[0041] In summary, the present invention adopts a one-pot simple wet chemical method to in-situ grow icosahedral platinum nanoparticles on cerium oxide nanosheets, and reacts a mixed reaction system comprising a platinum-containing metal precursor, a cerium-containing metal precursor, a surfactant, a reducing agent and a solvent, wherein the reducing agent reduces the metal precursor to prepare the platinum nanoparticle / cerium oxide catalyst. The preparation method of the present invention is simple and convenient, easy to operate, and the prepared platinum nanoparticle / cerium oxide has high and stable catalytic efficiency when used as a methanol oxidation catalyst, which can improve the anti-poisoning of the platinum catalyst in the methanol oxidation process, thereby enabling the methanol fuel cell to greatly convert chemical energy into electrical energy.

[0042] Moreover, the present invention can expose more catalytic active sites for alcohol oxidation electrocatalysis by adjusting the specific morphology structure of the platinum catalyst and selecting appropriate cerium oxide nanosheet carriers, and provide strong interaction between platinum and cerium oxide nanosheets. The platinum nanoparticle / cerium oxide catalyst of the present invention has an excellent stable structure and is an ideal platform for improving the electrocatalytic activity of methanol oxidation. It is also very beneficial for improving the slow kinetic process of pure platinum catalyst towards methanol anodic oxidation electrocatalysis.

[0043] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Those skilled in the art can make modifications or equivalent substitutions based on the understanding of the technical scheme of the present invention without departing from the spirit and scope of the technical scheme of the present invention, and all should be included in the protection scope of the present invention.

[0044] If no specific experimental steps or conditions are specified in the examples, the conventional experimental steps or conditions described in the literature in the art can be used. If no manufacturer is specified for the reagents or instruments used, they can be obtained commercially. The commercial selection of raw materials and instruments not mentioned is conventional and does not involve the core technical means of the present invention.

[0045] Example 1 1) First, mix platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid in a high-temperature screw-capped reaction bottle, wherein their mixing ratios are 10 mg: 5.57 mg: 64 mg: 60 mg, respectively, and the molar ratio of platinum acetylacetonate to cerium acetylacetonate is 66:34. Then, add 5 mL of oleylamine to form a mixture; tighten the high-temperature screw-capped bottle cap, wrap the sealing tape around the bottle mouth three times to seal it, and shake it by hand to mix the solid and liquid evenly.

[0046] 2) Treat the drug in ultrasound to completely dissolve and further disperse it evenly, then use a constant temperature magnetic stirrer to heat it in an oil bath at 180°C for 10 hours. After the reaction is completed, the reaction bottle and the reaction products inside are naturally cooled to room temperature.

[0047] 3) Pour the reaction product into a centrifuge tube, first add cyclohexane and shake by hand to wash, then add ethanol and centrifuge to obtain the centrifuged product. The mixing ratio of cyclohexane and anhydrous ethanol is 5 ml:20 ml. Pour out the supernatant, and then disperse the obtained reaction product in cyclohexane. The mass fraction of the reaction product in cyclohexane is 0.08%, and Pt / CeOx-1 is successfully prepared.

[0048] 4) The reaction product dispersed in cyclohexane was placed in a beaker and added dropwise to the ethanol solution in which the carbon black was dispersed, and ultrasonicated. The mass ratio of the reaction product to the carbon carrier was 1:3, and the mixing ratio of the carbon black to the anhydrous ethanol was 3 mg: 10 ml. After loading it onto the carbon black, it was centrifuged to obtain a black platinum nanoparticle / cerium oxide catalyst, which was dried at 70°C for 12 hours for use. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst was 66wt%.

[0049] The platinum nanoparticle / cerium oxide catalyst prepared in Example 1 was photographed. Figure 1 The platinum nanoparticle / cerium oxide catalyst prepared in this embodiment was characterized by XRD, low-magnification transmission electron microscopy and high-magnification transmission electron microscopy. Figure 2 As shown, the low-magnification transmission electron microscopy images and high-magnification transmission electron microscopy images are shown in Figure 3 and Figure 4 As shown in the figure, the data show that when the molar ratio of platinum acetylacetonate to cerium acetylacetonate is 66:34, cerium oxide presents an ultra-thin nanosheet morphology, and regular icosahedral platinum nanoparticles are formed on the cerium oxide nanosheet film; Figure 5 As shown, the synthesized platinum nanoparticle / cerium oxide catalyst has good catalytic performance for methanol oxidation reaction, and its mass activity is about 2.25 times that of the commercial platinum carbon catalyst.

[0050] Example 1 demonstrates that when the molar ratio of platinum acetylacetonate to cerium acetylacetonate is 66:34, the platinum nanoparticles / cerium oxide exhibit a regular morphology and have better activity than commercial platinum-carbon catalysts.

[0051] Example 2 The experimental steps were the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid were 10 mg: 2.78 mg: 64 mg: 60 mg, respectively, and the molar ratio of platinum acetylacetonate to cerium acetylacetonate was 83:17, and Pt / CeOx-2 was successfully prepared. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst was 83 wt%.

[0052] Example 3 The experimental steps were the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid were 2.09 mg: 8.89 mg: 64 mg: 60 mg, respectively, and the molar ratio of platinum acetylacetonate to cerium acetylacetonate was 12:88, and Pt / CeOx-3 was successfully prepared. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst was 12 wt%.

[0053] Example 4 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 10 mg: 12.38 mg: 64 mg: 60 mg, respectively, and the molar ratio of platinum acetylacetonate to cerium acetylacetonate is 1: 1. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst is 50 wt%.

[0054] Example 5 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 10 mg: 5.57 mg: 30 mg: 60 mg, respectively. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst is 32 wt%.

[0055] Example 6 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 10 mg: 5.57 mg: 60 mg: 60 mg, respectively. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst is 59 wt%.

[0056] Example 7 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 10 mg: 5.57 mg: 90 mg: 60 mg, respectively. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst is 66 wt%.

[0057] Example 8 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 10 mg: 5.57 mg: 64 mg: 30 mg, respectively. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst is 45 wt%.

[0058] Example 9 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 10 mg: 5.57 mg: 64 mg: 70 mg, respectively. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst is 62 wt%.

[0059] Example 10 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 10 mg: 5.57 mg: 64 mg: 90 mg, respectively. The content of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalyst is 61 wt%.

[0060] Embodiment 11 The experimental steps were the same as those in Example 1, except that the reaction temperature was 180° C., and the oil bath heating reaction time was 4 h, 8 h, and 12 h, respectively. The contents of platinum nanoparticles in the obtained platinum nanoparticle / cerium oxide catalysts were 39 wt %, 62 wt %, and 64 wt %, respectively.

[0061] Comparative Example 1 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 10 mg: 0 mg: 64 mg: 60 mg, respectively, and the molar ratio of platinum acetylacetonate to cerium acetylacetonate is 1:0, i.e., there is no cerium acetylacetonate.

[0062] Comparative Example 2 The experimental steps are the same as those in Example 1, except that the mixing ratios of platinum acetylacetonate, cerium acetylacetonate, hexadecyltrimethylammonium chloride, and ascorbic acid are 0 mg: 5.57 mg: 64 mg: 60 mg, respectively, and the molar ratio of platinum acetylacetonate to cerium acetylacetonate is 0:1, i.e., there is no platinum acetylacetonate.

[0063] The various aspects, embodiments, features and examples of the present invention should be considered as illustrative in all aspects and are not intended to limit the present invention, the scope of the present invention is defined only by the claims. Other embodiments, modifications and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.

[0064] In addition, the inventors of this case also referred to the aforementioned embodiments and conducted experiments with other raw materials, process operations, and process conditions described in this specification, and obtained relatively ideal results.

[0065] Although the present invention has been described with reference to illustrative embodiments, it will be appreciated by those skilled in the art that various other changes, omissions and / or additions may be made and that elements of the described embodiments may be substituted with substantial equivalents without departing from the spirit and scope of the present invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present invention without departing from the scope of the present invention. Therefore, it is not intended herein to limit the present invention to the disclosed specific embodiments for carrying out the present invention, but rather it is intended that the present invention will include all embodiments within the scope of the appended claims.

Claims

1. A platinum nanoparticle / cerium oxide catalyst, characterized in that The invention comprises platinum nanoparticles and cerium oxide nanosheets. The platinum nanoparticles are in-situ grown and uniformly distributed on the cerium oxide nanosheets. The platinum nanoparticles / cerium oxide catalyst has an icosahedral structure.

2. The platinum nanoparticle / cerium oxide catalyst according to claim 1, characterized in that: The content of platinum nanoparticles in the platinum nanoparticle / cerium oxide catalyst is 12-83 wt %.

3. The platinum nanoparticle / cerium oxide catalyst according to claim 1, characterized in that: The particle size of the platinum nanoparticles is 14-18 nm; and / or, the platinum nanoparticles have an icosahedral structure; And / or, the cerium oxide nanosheet has a length of 40-100 nm, a width of 40-100 nm, and a sheet thickness of 5-7 nm.

4. A method for preparing a platinum nanoparticle / cerium oxide catalyst, characterized in that: The platinum nanoparticle / cerium oxide catalyst is prepared by reacting a mixed reaction system comprising a platinum-containing metal precursor, a cerium-containing metal precursor, a surfactant, a reducing agent and a solvent.

5. The preparation method according to claim 4, characterized in that: The mass ratio of the platinum-containing metal precursor, the cerium-containing metal precursor, the surfactant and the reducing agent is (2.09-10): (2.78-12.38): (30-90): (30-90); And / or, the reaction temperature is 100-200° C. and the reaction time is 4-12 hours.

6. The preparation method according to claim 4, characterized in that: The platinum-containing metal precursor includes at least any one of platinum acetylacetonate, hexachloroplatinic acid, potassium chloroplatinite, sodium chloroplatinite, potassium chloroplatinate, chloroplatinic acid, platinum dichloride, and platinum tetrachloride; And / or, the cerium-containing metal precursor includes at least any one of cerium acetylacetonate, cerium nitrate, cerium chloride, and cerium sulfate; And / or, the reducing agent includes at least any one of ascorbic acid, glucose, sodium borohydride, and tungsten hexacarbonyl; And / or, the surfactant includes at least any one of hexadecyltrimethylammonium chloride, ammonium bromide, and hexadecyltrimethylammonium bromide; And / or, the solvent includes at least any one of oleylamine, oleic acid, and octadecene.

7. The preparation method according to claim 4, characterized in that: The method comprises centrifuging the product obtained from the reaction; And / or, the preparation method further comprises: adding the solid obtained by the centrifugal treatment to a mixed solution containing a carbon carrier, loading the solid on the carbon carrier, and then preparing the platinum nanoparticle / cerium oxide catalyst after centrifugation and drying.

8. The preparation method according to claim 7, characterized in that: The carbon carrier includes at least any one of carbon black, carbon nanotubes, acetylene carbon, graphite carbon, and Ketjen black; And / or, the mass ratio of the solid to the carbon carrier is 1:3 to 1:2; And / or, the drying temperature is 60-70° C., and the drying time is 10-12 hours.

9. A platinum nanoparticle / cerium oxide catalyst prepared by the preparation method according to any one of claims 4 to 8.

10. Use of the platinum nanoparticle / cerium oxide catalyst according to any one of claims 1 to 3 or claim 9 in catalyzing methanol oxidation reaction; Preferably, the application includes application in alcohol fuel cells; Particularly preferably, the application includes application in anode oxidation electrocatalysis of alcohol fuel cells.

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