CN114267847A - Novel bimetallic oxygen reduction electrocatalyst - Google Patents
Novel bimetallic oxygen reduction electrocatalyst Download PDFInfo
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- 239000010411 electrocatalyst Substances 0.000 title claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 17
- 239000001301 oxygen Substances 0.000 title claims abstract description 17
- 230000009467 reduction Effects 0.000 title claims abstract description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000243 solution Substances 0.000 claims abstract description 19
- GFHNAMRJFCEERV-UHFFFAOYSA-L cobalt chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Co+2] GFHNAMRJFCEERV-UHFFFAOYSA-L 0.000 claims abstract description 18
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 claims abstract description 17
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 claims abstract description 17
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000001291 vacuum drying Methods 0.000 claims abstract description 7
- YSWBFLWKAIRHEI-UHFFFAOYSA-N 4,5-dimethyl-1h-imidazole Chemical compound CC=1N=CNC=1C YSWBFLWKAIRHEI-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 4
- 239000011259 mixed solution Substances 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 11
- 229910052573 porcelain Inorganic materials 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229920000877 Melamine resin Polymers 0.000 claims description 6
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 3
- 238000003837 high-temperature calcination Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims 1
- XTUSEBKMEQERQV-UHFFFAOYSA-N propan-2-ol;hydrate Chemical compound O.CC(C)O XTUSEBKMEQERQV-UHFFFAOYSA-N 0.000 claims 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003575 carbonaceous material Substances 0.000 abstract description 9
- 239000013153 zeolitic imidazolate framework Substances 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 238000000197 pyrolysis Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000002244 precipitate Substances 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 238000006722 reduction reaction Methods 0.000 description 12
- 239000003054 catalyst Substances 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 239000002131 composite material Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910020630 Co Ni Inorganic materials 0.000 description 2
- 229910002440 Co–Ni Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 229960002337 magnesium chloride Drugs 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- JFRHWQBNJASIQN-UHFFFAOYSA-N CO.CC1=C(N=CN1)C Chemical compound CO.CC1=C(N=CN1)C JFRHWQBNJASIQN-UHFFFAOYSA-N 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 229910001325 element alloy Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012621 metal-organic framework Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000013154 zeolitic imidazolate framework-8 Substances 0.000 description 1
- ZULISPCCQYDDNG-UHFFFAOYSA-N zinc methanol dinitrate Chemical compound CO.[N+](=O)([O-])[O-].[Zn+2].[N+](=O)([O-])[O-] ZULISPCCQYDDNG-UHFFFAOYSA-N 0.000 description 1
- MFLKDEMTKSVIBK-UHFFFAOYSA-N zinc;2-methylimidazol-3-ide Chemical compound [Zn+2].CC1=NC=C[N-]1.CC1=NC=C[N-]1 MFLKDEMTKSVIBK-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses a novel bimetallic oxygen reduction electrocatalyst which is characterized in that a bimetallic oxygen reduction material is prepared by a two-step method through combining a high-temperature pyrolysis ZIFs material and a simple physical adsorption bimetallic method. The preparation steps disclosed by the invention are as follows: (1) firstly, preparing a methanol solution of zinc nitrate and a methanol solution of dimethyl imidazole, mixing the solutions, fully stirring the mixed solution at room temperature, centrifuging the solution, drying the solution in a vacuum drying oven, and drying the solution in N2Performing medium-high temperature pyrolysis to obtain a carbon material; (2) dispersing a carbon material, cobalt chloride hexahydrate and magnesium chloride hexahydrate in an isopropanol aqueous solution, performing ultrasonic treatment and uniformly stirring, centrifuging the precipitate, and drying in a vacuum drying oven; (3) finally in N2And annealing at medium and high temperature to obtain the bimetallic compound material. The reaction process is simple and low in costThe prepared material has excellent appearance, high specific surface area and more active sites.
Description
Technical Field
The invention belongs to the field of zinc-air battery electrocatalysts, and particularly relates to a synthesis method and application of a novel bimetallic oxygen reduction electrocatalyst.
Background
With the serious energy consumption of the current generation, the problems of global warming and the like caused by the rapid consumption of fossil fuels are prominent. Therefore, various energy technologies are emerging, such as lithium ion battery, sodium ion battery, fuel cell, etc. have become important media for connecting energy collection and conversion. Zinc-air batteries are the most promising metal-air batteries because of their high specific energy, safety, low cost, greenness, and other characteristics. The Oxygen Reduction Reaction (ORR) is an important positive electrode reaction in zinc-air batteries. Commercial electrocatalysts for ORR are Pt-based nanomaterials which suffer from high cost, limited availability, and poor stability. The carbon material has the advantages of large surface area, good conductivity, adjustable shape, convenient preparation, economic feasibility and the like, and is widely concerned, so that the carbon material becomes one of hot spots for researching the ORR catalyst. Carbon materials have excellent corrosion resistance characteristics, but do not possess significant catalytic activity.
The ZIFs-derived carbon material is often used as a precursor for preparing an electrocatalyst, for example, a transition metal-nitrogen-carbon (M-N-C) material obtained by high-temperature pyrolysis of ZIFs has high catalytic activity, and thus, the ZIFs-derived carbon material becomes a common preparation method of the ZIFs-derived electrocatalyst. The MOFs structure is composed of ordered three-dimensional porous crystals formed by the coordination of carbon and nitrogen ligands and metals. These structures and chemistries not only meet the requirements of M-N-C compositions as templates, but also provide ordered three-dimensional porous structures. Furthermore, the strong interaction between the metal atoms and the nitrogen atoms favours the production of more active sites and higher intrinsic catalytically active sites during the carbonisation process. Bimetallic alloys such as Co-Ni, Fe-Ni and Fe-Co have been recognized as very effective active sites for ORR, and they exhibit higher activity and stability compared to single element alloys.
The bimetallic composite electrocatalyst can benefit from the synergistic catalytic effect and coupling effect among heterogeneous metals and has different characteristics from the single metal catalyst. Since the bonding between two different metals can establish intrinsic polarity, providing a faradaic-rich redox reaction originating from multiple valence states, the electrical conductivity is further improved, thereby enabling the catalytic reaction to proceed. M.kato et al, by preparing a (Cu, Fe) -N-CNT heterogeneous metal electrocatalyst, revealed a promoting effect of the heterogeneous metal synergy on ORR kinetics. Strasser et al have shown that bimetallic (Fe, Mn) -N-C electrocatalysts have higher ORR performance and suggest that synergistic effects between Fe and Mn can significantly improve ORR activity. At the same time withThe (Fe, Co) -N-C electrocatalysts also exhibit superior activity and durability compared to other heterogeneous metal electrocatalysts, thus representing a great potential value. The half-wave potential (E) of the existing Co bimetallic-nitrogen-carbon catalyst1/2) Mostly less than 0.9V, e.g. of bimetallic Co-Ni catalysts1/2About 0.8V, E of Fe-Co-N-C1/2Also less than 0.9V. Therefore, how to further expand the selection range of the catalyst and make the catalyst have better effect than a Co-containing bimetallic-nitrogen-carbon catalyst in ORR application has positive significance.
Disclosure of Invention
The invention aims to provide a novel bimetallic oxygen reduction electrocatalyst, and a bimetallic catalyst with excellent catalytic activity is obtained. In order to achieve the purpose, the invention adopts the following technical scheme:
step (1): mixing a methanol solution of zinc nitrate and a methanol solution of dimethyl imidazole, stirring overnight at room temperature for 24 hours, centrifuging the precipitate, drying in a vacuum drying oven, placing the white powder in a porcelain boat, and calcining at high temperature in nitrogen by using a tube furnace to obtain a primary product, namely black powder; the invention is preferably ZIF-8 material, and if other ZIF derivatives are adopted, the precursor has certain influence on the overall performance.
Further, in the step (1), the amount of zinc nitrate in the 150mL of zinc nitrate methanol solution is 0.02mol, and the amount of dimethylimidazole in the 150mL of dimethylimidazole methanol solution is 0.075mol, in a volume ratio of 1: 1.
Further, the condition of the high-temperature calcination in the step (1) is N2The temperature is 900 ℃ and the time is 2 h.
Step (2): dispersing the black powder in the step (1) in an isopropanol aqueous solution, sequentially adding melamine, cobalt chloride hexahydrate and magnesium chloride hexahydrate in different proportions into a mixed solution, dissolving, performing ultrasonic treatment, continuously stirring, centrifuging the solution, and drying in a vacuum drying oven; further, the mass ratio of the total mass of the cobalt chloride hexahydrate and the magnesium chloride hexahydrate in the step (2) to the black powder is 3: 5; the mass ratio of the black powder to the melamine is 1:2, and the different molar ratios of the cobalt chloride hexahydrate and the magnesium chloride hexahydrate are 1: 3-3: 1. Preferably 1: 3.
Further, the volume ratio of the isopropanol to the deionized water in the isopropanol aqueous solution in the step (2) is 1: 1; the ultrasonic temperature is room temperature, the ultrasonic time is 1h, the stirring temperature is room temperature, and the stirring time is 3h, so as to realize more uniform adsorption.
And (3): collecting the dried product in the step (2) and placing the product in a porcelain boat, and finally placing the porcelain boat in a tube furnace in N2And annealing at medium and high temperature to obtain the bimetal compound composite material.
Further, the high-temperature calcination condition in the step (3) is nitrogen atmosphere, the temperature is 900 ℃, and the time is 2 hours.
Compared with the prior art, the invention has the advantages that:
(1) the carbon material has excellent corrosion resistance and is suitable for severe use environments. The ZIFs derived carbon material also has the advantages of higher specific surface area, abundant pores, controllability of structure and components and the like.
(2) The concerted catalysis between the bimetals is beneficial to provide more effective active sites compared to the single metal, thereby improving the catalytic activity and stability of the material. The invention ensures that the prepared Mg-Co bimetallic oxygen reduction catalyst has higher half-wave potential and initial potential by optimizing various conditions. The synthesis process is simple, the cost is low, and the synthesis of the material can be effectively controlled.
Drawings
FIG. 1 scanning electron micrograph of novel Mg-Co bimetallic oxygen reduction electrocatalyst prepared in example 1;
FIG. 2 scanning electron micrograph of novel Mg-Co bimetallic oxygen reduction electrocatalyst prepared in example 2;
FIG. 3 scanning electron micrograph of novel Mg-Co bimetallic oxygen reduction electrocatalyst prepared in example 3;
FIG. 4 ORR performance in alkaline for the novel Mg-Co bimetallic oxygen reduction electrocatalyst prepared in example 1.
FIG. 5 is a graph comparing the stability test performed under the constant potential Pt/C method for the novel Mg-Co bimetallic oxygen reduction electrocatalyst prepared in example 1.
Detailed Description
The technical features and characteristics of the present invention are described in detail below with reference to specific embodiments, but the embodiments are not intended to limit the scope of the present invention. The preparation of such Mg-Co bimetallic oxygen reduction catalysts is also used for other types of transition metals.
Example 1
(1) 0.02mol of zinc nitrate in methanol (150mL) was mixed with 0.075mol of dimethylimidazole in methanol (150mL), stirred at room temperature for 24h and then centrifugally dried, the powder collected and used in a tube furnace under N2Calcining at 900 ℃ for 2 h;
(2) dispersing 50mg of the calcined product obtained in the step (1) in an aqueous isopropanol solution (the volume ratio of isopropanol to deionized water is 1:1) at a concentration of 0.0065mol L-1Sequentially adding 0.1g of melamine and cobalt chloride hexahydrate into the solution, wherein the mass of the melamine and the cobalt chloride hexahydrate are as follows: 8.4173mg, the mass of magnesium chloride hexahydrate is: 21.583mg (the molar ratio of the cobalt chloride hexahydrate to the magnesium chloride hexahydrate is 1:3) of the cobalt chloride hexahydrate and the magnesium chloride hexahydrate is 30mg in mass, ultrasonic treatment is carried out at room temperature for 1h after dissolution, then the solution is continuously stirred at room temperature for 3h, and the solution is dried in a vacuum drying oven after centrifugation;
(3) collecting the final product in the step (2) in a porcelain boat, and using a tube furnace in N2And annealing at the high temperature of 900 ℃ for 2 hours to obtain the Mg-Co bimetal compound composite material.
Example 2
Example 2 is different from example 1 in that: the molar ratio of the cobalt chloride hexahydrate to the magnesium chloride hexahydrate is 1:1 (the mass of the cobalt chloride hexahydrate is 16.1751Mg, and the mass of the magnesium chloride hexahydrate is 13.825Mg), and the other operations are the same, so that the Mg-Co bimetal compound composite material is obtained.
Example 3
Example 3 is different from example 1 in that: the molar ratio of cobalt chloride hexahydrate to magnesium chloride hexahydrate was 3:1 (the mass of cobalt chloride hexahydrate was 23.35Mg, and the mass of magnesium chloride hexahydrate was 6.65Mg), and the same operations were carried out, thereby obtaining a Mg — Co bimetallic compound composite material.
Comparative example 1
Comparative example 1 is different from example 1 in that: and (3) adding no magnesium chloride, wherein 30mg of cobalt chloride is added, and the other operations are the same, so that the Co single metal compound composite material is obtained.
Comparative example 2
Comparative example 2 differs from example 1 in that: and (3) adding no cobalt chloride, wherein 30Mg of magnesium chloride is adopted, and the other operations are the same, so that the Mg single metal compound composite material is obtained.
The resulting bimetallic compound composites prepared in examples 1-3 were tested for ORR performance using a rotating disk electrode under basic 0.1MKOH conditions.
By test comparison, the half-wave potential of the cobalt chloride hexahydrate and the magnesium chloride hexahydrate of the example 3 at the molar ratio of 3:1 is only 0.79V; the half-wave potential of the cobalt chloride hexahydrate and the magnesium chloride hexahydrate is closer to that of platinum and carbon at a molar ratio of 1:1 and is about 0.86V; the ORR performance is best when the molar ratio of the cobalt chloride hexahydrate to the magnesium chloride hexahydrate is 1:3, and the half-wave potential is close to 0.92V. Whereas the half-wave potential of the Co monometallic of comparative example 1 was only 0.78V; whereas the half-wave potential of the Mg monometallic of comparative example 2 was only 0.83V. The Mg-Co bimetallic oxygen reduction catalyst has higher half-wave potential and initial potential, the initial potential is 0.84V for single metal Co, 0.90V for single metal Mg, and the initial potential of the Mg-Co bimetallic of example 1 is 1.0V.
Claims (5)
1. A novel bimetallic oxygen reduction electrocatalyst is characterized in that the bimetallic oxygen reduction electrocatalyst is prepared by the following method:
(1) mixing a methanol solution of zinc nitrate and a methanol solution of dimethyl imidazole, stirring overnight at room temperature, precipitating, centrifuging, drying in a vacuum drying oven, placing white powder in a porcelain boat, and calcining at high temperature in nitrogen by using a tube furnace to obtain a primary product, namely black powder;
(2) dispersing the black powder in the step (1) in an isopropanol water solution, sequentially adding melamine, cobalt chloride hexahydrate and magnesium chloride hexahydrate into a mixed solution, dissolving, performing ultrasonic treatment, continuously stirring, centrifuging the solution, and drying in a vacuum drying oven; wherein the molar ratio of the cobalt chloride hexahydrate to the magnesium chloride hexahydrate is 1: 3;
(3) collecting the dried product in the step (2) and placing the product in a porcelain boat, and finally placing the porcelain boat in a tube furnace in N2And annealing at medium and high temperature to obtain the Mg-Co bimetal compound material.
2. The novel bimetallic oxygen-reducing electrocatalyst according to claim 1, characterized in that: the molar ratio of the zinc nitrate to the dimethyl imidazole in the step (1) is 2: 7.5.
3. the novel bimetallic oxygen-reducing electrocatalyst according to claim 1, characterized in that: the annealing condition in the step (1) is a nitrogen atmosphere, the temperature is 900 ℃, and the time is 2 h.
4. The novel bimetallic oxygen-reducing electrocatalyst according to claim 1, characterized in that: the mass ratio of the total mass of the cobalt chloride hexahydrate and the magnesium chloride hexahydrate in the step (2) to the black powder is 3: 5; the mass ratio of black powder to melamine was 1: 2.
5. The novel bimetallic oxygen-reducing electrocatalyst according to claim 1, characterized in that: and (3) performing high-temperature calcination under the nitrogen atmosphere at 900 ℃ for 2 hours.
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| CN116154200A (en) * | 2022-12-30 | 2023-05-23 | 郑州大学 | Multi-metal atom supported carbon nitride catalyst and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115566207A (en) * | 2022-10-12 | 2023-01-03 | 北京科技大学 | Transition metal pyrophosphate ORR catalyst anchored on MOFs derived carbon skeleton and preparation method and application thereof |
| CN116154200A (en) * | 2022-12-30 | 2023-05-23 | 郑州大学 | Multi-metal atom supported carbon nitride catalyst and application thereof |
| CN116154200B (en) * | 2022-12-30 | 2024-05-31 | 郑州佛光发电设备股份有限公司 | Multi-metal atom supported carbon nitride catalyst and application thereof |
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