CN118054027A - Ternary metal oxide oxygen reduction catalyst and preparation method and application thereof - Google Patents
Ternary metal oxide oxygen reduction catalyst and preparation method and application thereof Download PDFInfo
- Publication number
- CN118054027A CN118054027A CN202211425717.1A CN202211425717A CN118054027A CN 118054027 A CN118054027 A CN 118054027A CN 202211425717 A CN202211425717 A CN 202211425717A CN 118054027 A CN118054027 A CN 118054027A
- Authority
- CN
- China
- Prior art keywords
- metal oxide
- oxygen reduction
- reduction catalyst
- oxide
- ternary metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 43
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000001301 oxygen Substances 0.000 title claims abstract description 33
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 33
- 230000009467 reduction Effects 0.000 title claims abstract description 23
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 20
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 9
- 239000010941 cobalt Substances 0.000 claims abstract description 9
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 239000002243 precursor Substances 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 6
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 6
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(2+);cobalt(3+);oxygen(2-) Chemical group [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical group O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000006230 acetylene black Substances 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 239000000969 carrier Substances 0.000 claims description 2
- 239000001307 helium Substances 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 239000003273 ketjen black Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 239000003792 electrolyte Substances 0.000 abstract description 13
- 230000003197 catalytic effect Effects 0.000 abstract description 8
- 229910000314 transition metal oxide Inorganic materials 0.000 description 26
- 238000006722 reduction reaction Methods 0.000 description 15
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 13
- 239000000243 solution Substances 0.000 description 10
- 239000000306 component Substances 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 5
- 230000027756 respiratory electron transport chain Effects 0.000 description 5
- 238000006555 catalytic reaction Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 235000000621 Bidens tripartita Nutrition 0.000 description 3
- 240000004082 Bidens tripartita Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 208000006637 fused teeth Diseases 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 2
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 2
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000001075 voltammogram Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 230000010757 Reduction Activity Effects 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Inert Electrodes (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a ternary metal oxide oxygen reduction catalyst, a preparation method and application thereof, wherein the ternary metal oxide oxygen reduction catalyst comprises a carrier and an active component loaded on the surface of the carrier; the active component is selected from the oxides of iron element, manganese element and cobalt element; the prepared oxygen reduction catalyst has the advantages of high catalytic activity, high stability, low cost and the like in concentrated alkaline electrolyte.
Description
Technical Field
The invention relates to the technical field of metal air fuel cells, in particular to a ternary metal oxide oxygen reduction catalyst and a preparation method and application thereof.
Background
The dual pressures of energy and the environment are driving people to continually seek new energy sources and new energy storage and conversion modes. Among the many energy storage and conversion types, electrochemical energy conversion and storage technologies (including metal-air batteries, fuel cells, supercapacitors, etc.) have been recognized as one of the most viable energy conversion and storage modes. Among them, the metal-air battery has been receiving extensive attention from researchers because of advantages of mild discharge conditions, stable output voltage, low cost, environmental friendliness, high safety performance, and the like.
The air cathode is a core component of a metal-air battery as a tool for energy conversion, and directly affects the performance and service life of the metal-air battery. The air cathode is generally composed of a gas diffusion layer, a current collector and a catalytic layer, and the internal multiphase interface, namely, the three-phase interface formed by air, electrolyte and a catalyst, is a place where an oxygen reduction reaction (Oxygen Reductive Reaction, ORR) occurs. However, the oxygen reduction reaction kinetics of the air cathode are very slow, which greatly limits the energy output of the fuel cell. Heretofore, platinum-based catalysts, silver-based catalysts, etc. have remained the most effective ORR catalysts, but have been costly, poor in durability, and limited their large-scale application. In addition, a metal-air battery electrolyte solution generally employs a high-concentration alkaline electrolyte aqueous solution (6M, 8M, even 10M sodium hydroxide, potassium hydroxide solution, etc.), and as the concentration of the alkaline electrolyte increases, the diffusion coefficient and solubility of oxygen in the electrolyte significantly decrease, resulting in the electron transfer path of ORR being affected, thereby inhibiting catalytic activity. Therefore, designing and preparing the ORR catalyst with high activity, high stability and low cost is of great importance for promoting the wide application of the fuel cell.
Disclosure of Invention
The transition metal oxide has excellent oxygen reduction activity and low cost, and the carbon-supported transition metal oxide formed by compounding the transition metal oxide with carbon is expected to replace a noble metal Pt/C catalyst. In addition, in the ORR reaction process, the transition metal oxide is expected to induce the transition from the oxygen adsorption process to bridge double-tooth adsorption, so that the ORR reaction is facilitated. However, single transition metal oxide materials still suffer from drawbacks, and the intrinsic activity of the material is still different from that of Pt materials with "volcanic curve" peaks. Furthermore, considering that in practical use of the metal-air battery, as the alkali concentration increases, oxygen solubility decreases sharply and solution viscosity increases continuously, the ORR reaction electron transfer number gradually changes from the expected 4 electron transfer to 2 electrons, even single electrons, thereby resulting in a great suppression of the ORR process. Therefore, the carbon-supported multi-element transition metal oxide with low cost is designed and prepared, the advantages of the synergistic catalysis and oxygen double-tooth adsorption among the multi-element transition metal oxides are exerted, and the ORR performance is comparable with the catalytic performance of Pt/C or Ag/C in a concentrated alkaline electrolyte environment.
In order to solve the problems, the invention provides an oxygen reduction catalyst with high activity, high stability and low cost. The synergistic catalysis between the multiple transition metal oxides is utilized, so that the catalyst still has higher catalysis performance under the condition of concentrated alkaline electrolyte.
According to one aspect of the present application, there is provided a ternary metal oxide oxygen reduction catalyst comprising a support and an active component supported on the surface of the support;
The active component is selected from the group consisting of oxides of elemental iron, oxides of elemental manganese, and oxides of elemental cobalt;
The specific surface area of the ternary metal oxide oxygen reduction catalyst is 60-80 m 2/g, the pore diameter is 10-20 nm, and the pore volume is 0.1-0.3 cc/g.
The oxide of the iron element is ferroferric oxide;
the oxide of the manganese element is manganous-manganic oxide;
the oxide of the cobalt element is cobaltosic oxide;
The carrier is at least one selected from acetylene black, active carbon and ketjen black.
The ternary metal oxide oxygen reduction catalyst is a dark gray powder.
According to another aspect of the present application, there is provided a method for preparing the ternary metal oxide oxygen reduction catalyst described above, comprising the steps of:
mixing raw materials containing active component precursors and carriers with water, reacting in a closed container, drying, and performing heat treatment to obtain the ternary metal oxide oxygen reduction catalyst.
The active component precursor is selected from at least one of nitrate, chloride and sulfate of iron element, at least one of nitrate, chloride and sulfate of manganese element, and at least one of nitrate, chloride and sulfate of cobalt element;
in the active component precursor, the molar ratio of iron element, manganese element and cobalt element is 1: (1.3-1.6): (1.7-2); ;
The mass ratio of the active component precursor to the water to the carrier is 1: (19-21): (2.5-3.5).
The temperature of the reaction is 200-260 ℃;
alternatively, the temperature of the reaction is any value or range of values between any two of 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 250 ℃, 260 ℃.
The reaction time is 1-3 h;
Alternatively, the reaction time is any value or range of values between any two of 1h, 2h, 3 h.
The reaction was carried out in an oven.
The drying temperature is 60-80 ℃;
optionally, the drying temperature is any value or range of values between any two of 60 ℃, 70 ℃, 80 ℃.
The drying time is 1-3 h.
Optionally, the drying time is any value or a range of values between any two of 1h, 2h, 3 h.
The heat treatment atmosphere is an inactive gas atmosphere;
preferably, the inert gas atmosphere is selected from at least one of nitrogen, argon and helium;
the temperature of the heat treatment is 500-1000 ℃;
optionally, the temperature of the heat treatment is any value or a range of values between any two of 500 ℃, 600 ℃, 700 ℃, 800 ℃, 900 ℃, 1000 ℃.
The heat treatment time is 24-36 h.
Optionally, the time of the heat treatment is any value or a range of values between any two of 24h, 30h, 36 h.
The mixing includes stirring;
the stirring time is 24-48 h.
Optionally, the stirring time is any value or range of values between any two of 24h, 30h, 36h, 42h, 48 h.
The mixing also comprises the step of adjusting the pH value to 5-6;
The process of adjusting the pH to 5-6 is realized by adding NaOH and/or HCl.
According to another aspect of the present application, there is provided a cathode comprising the ternary metal oxide oxygen reduction catalyst described above or the ternary metal oxide oxygen reduction catalyst prepared by the above-described preparation method.
According to another aspect of the present application, there is provided a zinc-air fuel cell comprising the cathode described above.
The application has the advantages that:
The prepared oxygen reduction catalyst has the advantages of high catalytic activity, high stability, low cost and the like in concentrated alkaline electrolyte. Synergistic catalysis between ternary transition metal oxides is advantageous in providing more efficient active sites than single metals to increase the catalytic activity of the material. In addition, in a concentrated alkali environment, the ternary transition metal oxide is favorable for double-tooth adsorption of oxygen in a Bridge form, and is more favorable for realizing 4-electron transfer in an ORR process, so that the energy conversion efficiency and the higher reaction potential are improved.
Drawings
FIG. 1 is an X-ray diffraction pattern of the ternary transition metal oxide prepared in example 1.
FIG. 2 is a scanning electron microscope image of the ternary transition metal oxide prepared in example 1.
FIG. 3 is a linear sweep voltammogram of the ternary transition metal oxide prepared in example 1 and a conventional Ag/C catalyst in 8MKOH electrolyte.
FIG. 4 is the electron transfer number of the ternary transition metal oxide prepared in example 1 in 8M KOH electrolyte.
Fig. 5 is a graph showing discharge performance of electrodes prepared from a ternary transition metal oxide and a conventional Ag/C catalyst.
Detailed Description
The present application is described in detail below with reference to examples, but the present application is not limited to these examples.
Unless otherwise indicated, all starting materials in the examples of the present application were purchased commercially.
Example 1
(1) Iron nitrate, manganese nitrate and cobalt nitrate are selected as metal salts, activated carbon is selected as a carbon carrier, 0.5g of iron nitrate, 0.55g of manganese nitrate and 0.7g of cobalt nitrate are sequentially weighed, added into 35g of deionized water, then 6g of activated carbon is weighed and added into the aqueous solution, and the mixture is fully stirred for 24 hours at room temperature.
(2) The solution was poured into a beaker, the pH of the solution was adjusted to 5 with HCl, and then the solution was poured into the tetrafluoro liner of the hydrothermal reaction vessel. The reaction kettle is placed in an oven, the temperature is set to 200 ℃, and the reaction time is 3 hours.
(3) After the reaction is finished, filtering the solution in the hydrothermal reaction kettle after the solution is at room temperature, washing the solution with deionized water for 3 times, then placing the solution in a vacuum drying oven at 60 ℃, and drying the solution for 1h to finally obtain black powder.
(4) And placing the black powder into a magnetic boat, and performing heat treatment in nitrogen by using a tube furnace, wherein the heat treatment temperature is 800 ℃, and the heat treatment time is 24 hours. Finally, black powder, namely the ternary metal oxide oxygen reduction catalyst is obtained.
FIG. 1 is an X-ray diffraction pattern of the ternary transition metal oxide prepared in example 1. It can be seen from the figure that the main components of the catalyst are ferroferric oxide, manganic oxide and cobaltosic oxide.
FIG. 2 is a scanning electron microscope image of the ternary transition metal oxide prepared in example 1. From the figure, it can be seen that the catalyst is in the form of spherical particles and is uniformly dispersed.
FIG. 3 is a linear sweep voltammogram of the ternary transition metal oxide prepared in example 1 and a conventional Ag/C catalyst in 8MKOH electrolyte. From the graph, the half-wave potential of the ternary transition metal oxide is slightly higher than that of the traditional Ag/C, and the ternary transition metal oxide has higher catalytic activity in 8 MKOH. .
FIG. 4 is the electron transfer number of the ternary transition metal oxide prepared in example 1 in 8M KOH electrolyte. It can be seen from the figure that the ternary transition metal oxide has a number of electrons transferred during the oxygen reduction reaction in 8M KOH of approximately 4.
Comparative example 1 was used
The ternary transition metal oxide obtained in example 1 and a conventional Ag/C catalyst were subjected to application comparison tests.
The preparation method and the testing method of the electrode are as follows:
1.5 g of the two catalysts were weighed and placed in two beakers, respectively.
2. To both beakers 50g of isopropanol and 5g of 60% PTFE solution were added.
3. And fully stirring for 24 hours to finally obtain the sticky catalyst slurry. 4. The catalyst slurry is evenly brushed on the inner surface of a diffusion layer with the area of 200mm by 200mm, and the loading is controlled to be 8-10mg/cm 2.
5. And pressing the diffusion layer coated with the catalyst for 1min under the pressure of 50T to obtain the air electrode.
6. The air electrodes of the two catalysts are assembled into a zinc air fuel cell, a 200mm pure zinc sheet is adopted as an anode, 8M KOH is adopted as electrolyte, and the polar distance is 6mm.
7. The test conditions were: the current density is 1mA/cm 2、5mA/cm2、10mA/cm2、15mA/cm2 respectively, the current density is the current density in the graph, and the discharge voltage is the ordinate.
Fig. 5 is a graph showing discharge performance of electrodes prepared from a ternary transition metal oxide and a conventional Ag/C catalyst. It can be seen from the figure that the electrode performance prepared by the ternary transition metal oxide is slightly higher than the discharge performance of the electrode prepared by the Ag/C catalyst under the same condition, so that the ternary transition metal oxide has good catalytic activity. .
While the application has been described in terms of preferred embodiments, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the application, and it is intended that the application is not limited to the specific embodiments disclosed.
Claims (10)
1. A ternary metal oxide oxygen reduction catalyst is characterized in that,
Comprises a carrier and an active component loaded on the surface of the carrier;
The active component comprises an oxide of iron element, an oxide of manganese element and an oxide of cobalt element;
The specific surface area of the ternary metal oxide oxygen reduction catalyst is 60-80 m 2/g, the pore diameter is 10-20 nm, and the pore volume is 0.1-0.3 cc/g.
2. The ternary metal oxide oxygen reduction catalyst according to claim 1, wherein,
The oxide of the iron element is ferroferric oxide;
the oxide of the manganese element is manganous-manganic oxide;
the oxide of the cobalt element is cobaltosic oxide;
The carrier is at least one selected from acetylene black, active carbon and ketjen black.
3. A process for preparing a ternary metal oxide oxygen reduction catalyst according to any one of claim 1 or 2, wherein,
The method comprises the following steps:
mixing raw materials containing active component precursors and carriers with water, reacting in a closed container, drying, and performing heat treatment to obtain the ternary metal oxide oxygen reduction catalyst.
4. A process according to claim 3, wherein,
The active component precursor is selected from at least one of nitrate, chloride and sulfate of iron element, at least one of nitrate, chloride and sulfate of manganese element, and at least one of nitrate, chloride and sulfate of cobalt element;
in the active component precursor, the molar ratio of iron element, manganese element and cobalt element is 1: (1.3-1.6): (1.7-2); ;
The mass ratio of the active component precursor to the water to the carrier is 1: (19-21): (2.5-3.5).
5. A process according to claim 3, wherein,
The temperature of the reaction is 200-260 ℃;
the reaction time is 1-3 h;
the drying temperature is 60-80 ℃;
the drying time is 1-3 h.
6. A process according to claim 3, wherein,
The heat treatment atmosphere is an inactive gas atmosphere;
preferably, the inert gas atmosphere is selected from at least one of nitrogen, argon and helium;
the temperature of the heat treatment is 500-1000 ℃;
The heat treatment time is 24-36 h.
7. A process according to claim 3, wherein,
The mixing includes stirring;
the stirring time is 24-48 h.
8. A process according to claim 3, wherein,
The mixing also comprises the step of adjusting the pH value to 5-6;
The process of adjusting the pH to 5-6 is realized by adding NaOH and/or HCl.
9. A cathode, characterized in that,
Comprising the ternary metal oxide oxygen reduction catalyst according to any one of claims 1 or 2 or the ternary metal oxide oxygen reduction catalyst produced by the production method according to any one of claims 3 to 8.
10. A zinc-air fuel cell is characterized in that,
A cathode comprising the cathode of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211425717.1A CN118054027A (en) | 2022-11-15 | 2022-11-15 | Ternary metal oxide oxygen reduction catalyst and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211425717.1A CN118054027A (en) | 2022-11-15 | 2022-11-15 | Ternary metal oxide oxygen reduction catalyst and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118054027A true CN118054027A (en) | 2024-05-17 |
Family
ID=91045453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211425717.1A Pending CN118054027A (en) | 2022-11-15 | 2022-11-15 | Ternary metal oxide oxygen reduction catalyst and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118054027A (en) |
-
2022
- 2022-11-15 CN CN202211425717.1A patent/CN118054027A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111224113B (en) | Ni-N4 monoatomic catalyst anchored by multistage carbon nanostructure and preparation method and application thereof | |
| CN110707337B (en) | Preparation method and application of carbon-based non-noble metal oxygen reduction catalyst | |
| CN112002915B (en) | Oxygen electrode bifunctional catalyst, preparation method and application | |
| WO2024093285A1 (en) | Electrocatalytic water oxidation homogeneous diatomic catalyst, and preparation method therefor and use thereof | |
| CN114725405B (en) | Preparation and application of composite carbon nano-particles loaded with ferrocobalt core-shell structure | |
| CN114744224B (en) | Preparation and application of nitrogen-doped carbon nanotube-loaded nickel-cobalt composite nanowire | |
| CN113571713A (en) | PtZn-loaded nitrogen-doped carbon catalyst, preparation method thereof and hydrogen-oxygen fuel cell | |
| CN112751046A (en) | Metal monoatomic supported carbon-based electrocatalyst and preparation method and application thereof | |
| CN110931815B (en) | Preparation method of fuel cell carbon-supported platinum-based catalyst | |
| CN115228474B (en) | Metal colloid catalyst for oxygen evolution reaction under alkaline condition and preparation method and application thereof | |
| CN111640953A (en) | Air electrode catalyst of aluminum-air battery and preparation method thereof | |
| CN116742027A (en) | Low-platinum catalyst and preparation method thereof | |
| CN113774425B (en) | Preparation method and application of Ru-modified FeCo @ NF electrocatalyst | |
| CN108336373B (en) | Preparation method of transition metal oxide nitrogen-phosphorus doped catalyst applied to zinc-air battery | |
| WO2024031917A1 (en) | Bimetallic single-atom nitrogen-doped porous carbon electrocatalyst and preparation method therefor | |
| Ge et al. | Low-cost and multi-level structured NiFeMn alloy@ NiFeMn oxyhydroxide electrocatalysts for highly efficient overall water splitting | |
| CN118054027A (en) | Ternary metal oxide oxygen reduction catalyst and preparation method and application thereof | |
| CN114122425A (en) | Dioxygen-doped O-FeN4C-O synthesis method and application in fuel cell | |
| WO2021076730A1 (en) | Nickel-based catalyst for fuel cell anode | |
| CN111063895A (en) | Non-carbon-based air electrode material for rechargeable zinc-air battery | |
| CN114807967B (en) | Preparation method of Ir-modified Ni/NiO porous nanorod array full-water-splitting catalyst | |
| CN114899428B (en) | Bifunctional cobalt/cobalt oxide Schottky junction catalyst and preparation method and application thereof | |
| US10522844B2 (en) | Nickel-based catalyst for fuel cell | |
| CN115652357B (en) | Sulfur-doped yttrium ruthenate, preparation method thereof and oxygen evolution reaction electrode | |
| CN115896816A (en) | Preparation method and application of dual-function series copper-based electro-catalytic nano material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |