A non-platinum catalyst for proton exchange membrane fuel cell and a preparation method and application thereof

Abstract

The application discloses a kind of proton exchange membrane fuel cell non-platinum catalyst and preparation method and application, it is related to battery technical field, non-platinum catalyst includes according to mass fraction: copper powder 30 parts, cobalt powder 25 parts, oxide 7 parts, metal catalyst 2 parts, fluorinated graphene 1 part, dihydroxy benzoic acid 13 parts, phenol 24 parts and salicylic acid 13 parts, the oxide is the perovskite type oxide containing La, Mn, O element.The preparation method of the application is simple, no high temperature and high pressure environment, and no toxic gas is generated, and the safety is higher, with the increase of silver metal catalyst content, the catalytic activity of non-platinum catalyst also has significant increase, that is, the performance of proton exchange membrane fuel cell is increased;With the increase of fluorinated graphene content, the hardness of non-platinum catalyst also increases, that is, the strength of non-platinum catalyst is increased, the service life of proton exchange membrane fuel cell is increased.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a non-platinum catalyst for proton exchange membrane fuel cells, its preparation method, and its application. Background Technology

[0002] Electrodes are components of a battery, serving as the two ends for inputting or outputting current into a conductive medium (solid, gas, vacuum, or electrolyte solution). The electrode inputting current is called the anode or positive electrode, and the electrode outputting current is called the cathode or negative electrode. Electrodes come in various types, such as cathodes, anodes, welding electrodes, and electric furnace electrodes. In a battery, an electrode generally refers to the location where a redox reaction occurs with the electrolyte solution. Electrodes are positive and negative; generally, the positive electrode is the cathode, gaining electrons and undergoing a reduction reaction, while the negative electrode is the anode, losing electrons and undergoing an oxidation reaction. Electrodes can be metallic or non-metallic; as long as they can exchange electrons with the electrolyte solution, they are considered electrodes. A proton exchange membrane fuel cell (PEMFC) is a type of battery that converts the Gibbs free energy portion of the fuel's chemical energy into electrical energy through an electrochemical reaction. It is not limited by the Carnot cycle effect and therefore has high efficiency. Generally, to improve the performance of a PEMFC, a non-platinum catalyst is coated onto the electrodes.

[0003] However, in the existing technology, most non-platinum catalysts in proton exchange membrane fuel cells have low hardness. During long-term use, non-platinum catalysts are easily damaged by external factors, resulting in a reduction in the service life of the battery. Summary of the Invention

[0004] The purpose of this invention is to provide a non-platinum catalyst for proton exchange membrane fuel cells, its preparation method, and its application, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A non-platinum catalyst for a proton exchange membrane fuel cell, wherein the non-platinum catalyst comprises, by weight parts:

[0007] 25-35 parts copper powder

[0008] 20-30 parts cobalt powder

[0009] 5-9 parts of oxides

[0010] 2-6 parts of metal catalyst

[0011] 1-4 parts of fluorinated graphene

[0012] 10-15 parts of dihydroxybenzoic acid

[0013] 20-28 parts of phenol

[0014] Salicylic acid 10-16 parts.

[0015] As a further aspect of the present invention: the oxide is a perovskite-type oxide containing La, Mn, and O elements.

[0016] As a further aspect of the present invention, the metal catalyst is elemental silver.

[0017] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, wherein the specific steps of the method are as follows:

[0018] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0019] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0020] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0021] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0022] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0023] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0024] As a further aspect of the present invention: the particle size of the copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling in step S2 needs to be less than 10 nm.

[0025] As a further embodiment of the present invention: the water bath heating temperature in step S4 is 75°C and the water bath heating time is 48h, and the magnetic stirrer rotation speed in step S4 is 3000-3600r / min.

[0026] As a further aspect of the present invention: the heating temperature under ultrasonic conditions in step S5 is 60°C, and the heating time under ultrasonic conditions is 10 hours.

[0027] As a further embodiment of the present invention: the freeze-drying temperature in step S6 is -14°C and the freeze-drying time is 60 hours.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the preparation method of the present invention is simple, there is no high temperature and high pressure environment, and no toxic gas is generated, so the safety is high. With the increase of silver metal catalyst content, the catalytic activity of non-platinum catalyst is also significantly increased, that is, the performance of proton exchange membrane fuel cell is increased; with the increase of fluorinated graphene content, the hardness of non-platinum catalyst is also increased, that is, the strength of non-platinum catalyst is increased, and the service life of proton exchange membrane fuel cell is increased. Attached Figure Description

[0029] Figure 1 This is a comparison chart of the hardness and catalytic activity of the non-platinum catalysts for proton exchange membrane fuel cells prepared in Examples 1-8 of this invention.

[0030] Figure 2 The image shows the hardness curves of the non-platinum catalysts for proton exchange membrane fuel cells prepared in Examples 1-8 of this invention.

[0031] Figure 3 The graphs show the catalytic activity curves of the non-platinum catalysts for proton exchange membrane fuel cells prepared in Examples 1-8 of this invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In Embodiment 1 of the present invention, a non-platinum catalyst for a proton exchange membrane fuel cell comprises, by mass fraction:

[0034] 30 parts copper powder

[0035] 25 parts cobalt powder

[0036] 7 parts of oxide

[0037] 2 parts of metal catalyst

[0038] 1 part of fluorinated graphene

[0039] 13 parts of dihydroxybenzoic acid

[0040] 24 parts of phenol

[0041] 13 parts of salicylic acid.

[0042] The oxide is a perovskite-type oxide containing La, Mn, and O elements, and the metal catalyst is elemental silver.

[0043] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, the specific steps of which are shown below:

[0044] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0045] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0046] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0047] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0048] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0049] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0050] In step S2, the particle size of copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling must be less than 10 nm. In step S4, the water bath heating temperature is 75℃ and the water bath heating time is 48 h. In step S4, the magnetic stirrer rotation speed is 3000-3600 r / min. In step S5, the ultrasonic heating temperature is 60℃ and the ultrasonic heating time is 10 h. In step S6, the freeze-drying temperature is -14℃ and the freeze-drying time is 60 h.

[0051] In Embodiment 2 of the present invention, a non-platinum catalyst for a proton exchange membrane fuel cell comprises, by mass fraction:

[0052] 30 parts copper powder

[0053] 25 parts cobalt powder

[0054] 7 parts of oxide

[0055] 2 parts of metal catalyst

[0056] 2 parts of fluorinated graphene

[0057] 13 parts of dihydroxybenzoic acid

[0058] 24 parts of phenol

[0059] 13 parts of salicylic acid.

[0060] The oxide is a perovskite-type oxide containing La, Mn, and O elements, and the metal catalyst is elemental silver.

[0061] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, the specific steps of which are shown below:

[0062] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0063] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0064] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0065] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0066] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0067] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0068] In step S2, the particle size of copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling must be less than 10 nm. In step S4, the water bath heating temperature is 75℃ and the water bath heating time is 48 h. In step S4, the magnetic stirrer rotation speed is 3000-3600 r / min. In step S5, the ultrasonic heating temperature is 60℃ and the ultrasonic heating time is 10 h. In step S6, the freeze-drying temperature is -14℃ and the freeze-drying time is 60 h.

[0069] In Embodiment 3 of the present invention, a non-platinum catalyst for a proton exchange membrane fuel cell is provided, wherein the non-platinum catalyst comprises, by mass fraction:

[0070] 30 parts copper powder

[0071] 25 parts cobalt powder

[0072] 7 parts of oxide

[0073] 2 parts of metal catalyst

[0074] 3 parts of fluorinated graphene

[0075] 13 parts of dihydroxybenzoic acid

[0076] 24 parts of phenol

[0077] 13 parts of salicylic acid.

[0078] The oxide is a perovskite-type oxide containing La, Mn, and O elements, and the metal catalyst is elemental silver.

[0079] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, the specific steps of which are shown below:

[0080] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0081] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0082] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0083] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0084] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0085] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0086] In step S2, the particle size of copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling must be less than 10 nm. In step S4, the water bath heating temperature is 75℃ and the water bath heating time is 48 h. In step S4, the magnetic stirrer rotation speed is 3000-3600 r / min. In step S5, the ultrasonic heating temperature is 60℃ and the ultrasonic heating time is 10 h. In step S6, the freeze-drying temperature is -14℃ and the freeze-drying time is 60 h.

[0087] In Example 4 of this invention, a non-platinum catalyst for a proton exchange membrane fuel cell comprises, by mass fraction:

[0088] 30 parts copper powder

[0089] 25 parts cobalt powder

[0090] 7 parts of oxide

[0091] 2 parts of metal catalyst

[0092] 4 parts of fluorinated graphene

[0093] 13 parts of dihydroxybenzoic acid

[0094] 24 parts of phenol

[0095] 13 parts of salicylic acid.

[0096] The oxide is a perovskite-type oxide containing La, Mn, and O elements, and the metal catalyst is elemental silver.

[0097] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, the specific steps of which are shown below:

[0098] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0099] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0100] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0101] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0102] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0103] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0104] In step S2, the particle size of copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling must be less than 10 nm. In step S4, the water bath heating temperature is 75℃ and the water bath heating time is 48 h. In step S4, the magnetic stirrer rotation speed is 3000-3600 r / min. In step S5, the ultrasonic heating temperature is 60℃ and the ultrasonic heating time is 10 h. In step S6, the freeze-drying temperature is -14℃ and the freeze-drying time is 60 h.

[0105] In Embodiment 5 of the present invention, a non-platinum catalyst for a proton exchange membrane fuel cell comprises, by mass fraction:

[0106] 30 parts copper powder

[0107] 25 parts cobalt powder

[0108] 7 parts of oxide

[0109] 3 parts of metal catalyst

[0110] 4 parts of fluorinated graphene

[0111] 13 parts of dihydroxybenzoic acid

[0112] 24 parts of phenol

[0113] 13 parts of salicylic acid.

[0114] The oxide is a perovskite-type oxide containing La, Mn, and O elements, and the metal catalyst is elemental silver.

[0115] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, the specific steps of which are shown below:

[0116] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0117] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0118] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0119] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0120] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0121] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0122] In step S2, the particle size of copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling must be less than 10 nm. In step S4, the water bath heating temperature is 75℃ and the water bath heating time is 48 h. In step S4, the magnetic stirrer rotation speed is 3000-3600 r / min. In step S5, the ultrasonic heating temperature is 60℃ and the ultrasonic heating time is 10 h. In step S6, the freeze-drying temperature is -14℃ and the freeze-drying time is 60 h.

[0123] In Embodiment 6 of the present invention, a non-platinum catalyst for a proton exchange membrane fuel cell comprises, by mass fraction:

[0124] 30 parts copper powder

[0125] 25 parts cobalt powder

[0126] 7 parts of oxide

[0127] 4 parts of metal catalyst

[0128] 4 parts of fluorinated graphene

[0129] 13 parts of dihydroxybenzoic acid

[0130] 24 parts of phenol

[0131] 13 parts of salicylic acid.

[0132] The oxide is a perovskite-type oxide containing La, Mn, and O elements, and the metal catalyst is elemental silver.

[0133] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, the specific steps of which are shown below:

[0134] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0135] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0136] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0137] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0138] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0139] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0140] In step S2, the particle size of copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling must be less than 10 nm. In step S4, the water bath heating temperature is 75℃ and the water bath heating time is 48 h. In step S4, the magnetic stirrer rotation speed is 3000-3600 r / min. In step S5, the ultrasonic heating temperature is 60℃ and the ultrasonic heating time is 10 h. In step S6, the freeze-drying temperature is -14℃ and the freeze-drying time is 60 h.

[0141] In Embodiment 7 of the present invention, a non-platinum catalyst for a proton exchange membrane fuel cell comprises, by mass fraction:

[0142] 30 parts copper powder

[0143] 25 parts cobalt powder

[0144] 7 parts of oxide

[0145] 5 parts of metal catalyst

[0146] 4 parts of fluorinated graphene

[0147] 13 parts of dihydroxybenzoic acid

[0148] 24 parts of phenol

[0149] 13 parts of salicylic acid.

[0150] The oxide is a perovskite-type oxide containing La, Mn, and O elements, and the metal catalyst is elemental silver.

[0151] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, the specific steps of which are shown below:

[0152] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0153] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0154] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0155] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0156] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0157] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0158] In step S2, the particle size of copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling must be less than 10 nm. In step S4, the water bath heating temperature is 75℃ and the water bath heating time is 48 h. In step S4, the magnetic stirrer rotation speed is 3000-3600 r / min. In step S5, the ultrasonic heating temperature is 60℃ and the ultrasonic heating time is 10 h. In step S6, the freeze-drying temperature is -14℃ and the freeze-drying time is 60 h.

[0159] In Example 8 of this invention, a non-platinum catalyst for a proton exchange membrane fuel cell is provided, comprising, by mass fraction:

[0160] 30 parts copper powder

[0161] 25 parts cobalt powder

[0162] 7 parts of oxide

[0163] 6 parts of metal catalyst

[0164] 4 parts of fluorinated graphene

[0165] 13 parts of dihydroxybenzoic acid

[0166] 24 parts of phenol

[0167] 13 parts of salicylic acid.

[0168] The oxide is a perovskite-type oxide containing La, Mn, and O elements, and the metal catalyst is elemental silver.

[0169] A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, the specific steps of which are shown below:

[0170] Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside.

[0171] Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials;

[0172] Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture;

[0173] Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one;

[0174] Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two.

[0175] Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

[0176] In step S2, the particle size of copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene after ball milling must be less than 10 nm. In step S4, the water bath heating temperature is 75℃ and the water bath heating time is 48 h. In step S4, the magnetic stirrer rotation speed is 3000-3600 r / min. In step S5, the ultrasonic heating temperature is 60℃ and the ultrasonic heating time is 10 h. In step S6, the freeze-drying temperature is -14℃ and the freeze-drying time is 60 h.

[0177] Depend on Figure 1 , Figure 2 and Figure 3It can be seen that with the increase of silver metal catalyst content, the catalytic activity of non-platinum catalyst also increases significantly, that is, the performance of proton exchange membrane fuel cell is improved; with the increase of fluorinated graphene content, the hardness of non-platinum catalyst also increases, that is, the strength of non-platinum catalyst is increased, and the service life of proton exchange membrane fuel cell is increased.

[0178] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-platinum catalyst for a proton exchange membrane fuel cell, characterized in that: The non-platinum catalyst comprises, by mass parts: 25-35 parts copper powder 20-30 parts cobalt powder 5-9 parts of oxides 2-6 parts of metal catalyst 1-4 parts of fluorinated graphene 10-15 parts of dihydroxybenzoic acid 20-28 parts of phenol 10-16 parts of salicylic acid; The oxide is a perovskite-type oxide containing La, Mn, and O elements; The metal catalyst is elemental silver.

2. A method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell, characterized in that: It is used to prepare the non-platinum catalyst for the proton exchange membrane fuel cell according to claim 1, and the specific steps of the preparation method of the non-platinum catalyst are as follows: Step S1: Weigh the raw materials, including copper powder, cobalt powder, oxide, metal catalyst, fluorinated graphene, dihydroxybenzoic acid, phenol, and salicylic acid, according to their mass proportions and set aside. Step S2: Copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene are respectively put into a ball mill for grinding to obtain small-particle-size copper powder, cobalt powder, oxide, metal catalyst and fluorinated graphene raw materials; Step S3: Mix and stir dihydroxybenzoic acid, phenol and salicylic acid to obtain a mixture; Step S4: Transfer the small-particle-size fluorinated graphene obtained in step S2 to the mixture in step S3, heat it in a water bath, and stir it with an electromagnetic stirrer to obtain mixture one; Step S5: Transfer the small-particle-size copper powder, cobalt powder, oxide and metal catalyst obtained in step S2 to mixture one in step S4, and heat it under ultrasonic conditions to obtain mixture two. Step S6: Transfer the mixture from step S5 to a freeze dryer for freeze drying to obtain the non-platinum catalyst product.

3. The method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell according to claim 2, characterized in that: In step S2, the particle size of the copper powder, cobalt powder, oxide, metal catalyst, and fluorinated graphene after ball milling must be less than 10 nm.

4. The method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell according to claim 2, characterized in that: The water bath heating temperature in step S4 is 75°C, and the water bath heating time is 48 hours. The magnetic stirrer rotation speed in step S4 is 3000-3600 r / min.

5. The method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell according to claim 2, characterized in that: In step S5, the heating temperature under ultrasonic conditions is 60°C, and the heating time under ultrasonic conditions is 10 hours.

6. The method for preparing a non-platinum catalyst for a proton exchange membrane fuel cell according to claim 2, characterized in that: The freeze-drying temperature in step S6 is -14℃, and the freeze-drying time is 60h.

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