CN116024603A - BiFeO 3 Preparation method and application of perovskite catalytic electrode - Google Patents
BiFeO 3 Preparation method and application of perovskite catalytic electrode Download PDFInfo
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Abstract
The invention discloses a BiFeO 3 A preparation method and application of perovskite catalytic electrode. The invention prepares the sol-gel of bismuth nitrate, ferric nitrate, glycol and citric acid to obtain a precursor by heat preservation at high temperature, and then obtains BiFeO by heat preservation and sintering in a muffle furnace 3 Perovskite catalytic material. After that BiFeO is added 3 The perovskite catalytic material is loaded on the surface of the hydrophilic carbon cloth to obtain the electrode slice used for producing ammonia by electrocatalytic reduction of nitrate. The electrode is subjected to morphology regulation by introducing current into the electrode to generate an elemental Bi material, and then the elemental Bi material is used for electrocatalytic nitrate reduction to produce ammonia. The invention leads the electrode to have morphology regulation by introducing current into the electrode, and compared with the electrode without introducing current, the BiFeO after morphology regulation 3 The perovskite catalytic electrode performance is obviously improved. The book is provided withBiFeO of the invention disclosure 3 The perovskite catalytic material has excellent catalytic performance and good cycle stability, solves the degradation problem of nitrate pollutants, generates ammonia with utilization value, and has important significance for harmless and recycling of nitrate.
Description
Technical Field
The invention relates to the technical field of catalytic materials, in particular to BiFeO 3 A preparation method and application of perovskite catalytic electrode.
Background
Ammonia has the characteristics of higher hydrogen content, high energy density, easy storage and transportation, no carbon emission and the like, is considered to be a novel energy source, has the prospect of long-term large-scale energy storage, is also an indispensable basic chemical in agriculture, industry and medicine industry, is key for realizing continuous production in a plurality of industries, and has higher application value. At present, ammonia synthesis is mainly produced by the haber process, high temperature of more than 450 ℃ and high pressure of 150-350atm and large-scale centralized infrastructure are the necessary conditions for the haber process, which belongs to an energy intensive process and consumes 2% of the annual energy supply worldwide. Furthermore, the haber process utilizes hydrogen derived from fossil fuels, which will produce 4 million tons of carbon dioxide per year, with a displacement of 1.2% of the annual carbon emissions worldwide. Like hydrogen and hydrocarbon derivatives such as methanol, ammonia can also be converted and produced by using renewable energy streams. Currently, efforts are made to explore routes to achieve ammonia synthesis from some renewable energy-generated power pairs, including: (l) electrochemical reduction of nitrogen to ammonia; (2) plasma-driven synthesis of nitrogen and hydrogen into ammonia; (3) electrocatalytic conversion of nitrogen oxides to ammonia. Meanwhile, compared with high-cost process technologies such as compressed hydrogen, hydrogen liquefaction, sealing and the like, the realization of electrocatalytic synthesis of ammonia by using sustainable energy supply is attractive. Nitrate ions are theoretically compared with nitrogenMore reactive, the dissociation energy of N=O bond is 204 kJ.mol -1 N.ident.N having a dissociation energy of 941 kJ.mol -1 Because the dissociation energy of the n=o bond is much lower than n≡n and the nitrate reduction reaction to ammonia is not limited by the low solubility of nitrogen in the aqueous environment, it is thermodynamically more advantageous. The nitrate reduction ammonia production reaction is a very practical alternative to the nitrogen reduction reaction.
The electrocatalyst is the key of electrochemical reduction reaction, and the development of a high-performance high-stability catalyst capable of realizing nitrate degradation and product selectivity regulation is a difficult problem to be solved. The transition metal compound, including transition metal oxide, nitride, sulfide, etc. has wide source, low cost, excellent electrocatalytic capacity, and great application value. The perovskite material is taken as an example, has tunable metal elements and chemical compositions, is stable and reliable in structural framework, and has adjustable catalytic activity and wide application range. However, in the field of electrocatalysis, perovskite materials often have the problems of insufficient electrocatalysis activity, ammonia nitrogen selectivity, insufficient current efficiency and the like, so that the catalytic performance and the application prospect are limited.
The invention relates to a preparation method of an inorganic perovskite and application of the inorganic perovskite in nitrate, wherein the preparation method and application of the strontium perovskite catalytic cathode relate to preparation of inorganic perovskite and application of the inorganic perovskite in nitrate, however, the inorganic perovskite has insufficient activity, perovskite powder is generated on porous Ti in situ, and the preparation method is complex and complex in operation, and limits the catalytic application of the perovskite.
In order to solve the problems, the invention provides a BiFeO 3 A preparation method and application of perovskite catalytic electrode.
Disclosure of Invention
The invention aims to provide BiFeO 3 A preparation method and application of perovskite catalytic electrode, which solves the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
BiFeO 3 Preparation of perovskite catalytic electrodeA method comprising the steps of:
step one: adding bismuth nitrate, ferric nitrate and citric acid into the glycol solution, and uniformly stirring to obtain a mixed solution; heating the mixed solution, and drying the water in the mixed solution to obtain dried sol-gel;
step two: sintering the dried sol gel to obtain dried BiFeO 3 A perovskite catalytic material;
step three: taking dried BiFeO 3 Uniformly mixing perovskite catalytic material, ethanol and Nafion binder solution to obtain catalyst slurry; coating the catalyst slurry on one surface of a conductive substrate, and drying to obtain BiFeO 3 Perovskite catalytic electrodes.
Preferably, the BiFeO 3 Performing morphology regulation treatment on the perovskite catalytic electrode, wherein the morphology regulation adopts a three-electrode system, a platinum sheet is selected as a counter electrode, ag/AgCl is selected as a reference electrode, and an electrocatalytic test is performed; the electrolyte adopts 50mM Na 2 SO 4 ,NO 3 - The concentration of the catalyst electrode is 0.1mol/L, and the catalyst electrode is introduced into the reactor at 15-20mA/cm 2 The current of (2) is 8-12h, the voltage range is 1.1-1.4V, and BiFeO is obtained 3 Perovskite catalytic electrodes.
More preferably, in the first step, the metal ions of the raw material: ethylene glycol: the molar ratio of citric acid is 80:4:1, and Bi in metal ions: the molar ratio of Fe is 1:1.
more optimally, in the first step, bismuth nitrate, ferric nitrate and citric acid are added into glycol solution and stirred uniformly to obtain mixed solution; and (3) preserving the temperature of the mixed solution at 80-90 ℃ for 10-12 hours, and preserving the temperature of the mixed solution at 120 ℃ for 10-12 hours to obtain the dried sol-gel.
More optimally, in the second step, the dried sol-gel is kept at 300-330 ℃ for 2-3 hours, the temperature is raised to 700-720 ℃, the heat preservation is continued for 3-4 hours, and the temperature raising rate is controlled to be 5 ℃/min, so as to obtain the dried BiFeO 3 Perovskite catalytic material.
More optimally, in the third step, the conductive substrate is hydrophilic carbon cloth, and the preparation method of the hydrophilic carbon cloth comprises the following steps: adding concentrated sulfuric acid, concentrated nitric acid and deionized water into carbon cloth for treatment for 6-8 hours; the concentrated sulfuric acid: concentrated nitric acid: the mass ratio of deionized water is 1:1:1.
more preferably, the loading of the catalyst slurry on the conductive substrate is 2.5-4.5mg/cm 2 。
BiFeO 3 BiFeO prepared by perovskite catalytic electrode preparation method 3 Perovskite catalytic electrodes.
BiFeO 3 Application of perovskite catalytic electrode, biFeO 3 Perovskite catalytic electrodes are used to electro-catalyze nitrate reduction to produce ammonia.
More preferably, the steps of electrocatalytic nitrate reduction to ammonia are as follows: combining working electrode with BiFeO 3 The perovskite catalytic electrode is connected, a platinum sheet counter electrode and silver chloride are used as reference electrodes, nitrate is used as raw material, and the electrolysis time is 20-30min, so as to obtain ammonia.
Compared with the prior art, the invention has the following beneficial effects:
(1) The primary object of the present invention is to provide BiFeO 3 The perovskite catalytic material electrode is prepared, and the morphology structure of the perovskite catalytic material electrode is changed through potential driving, so that the electrocatalytic performance is improved. Another object of the present invention is to provide BiFeO based on the above reaction 3 The perovskite catalytic material electrode is applied to the aspect of preparing ammonia by electrocatalytic nitrate reduction. Compared with the existing report of nitrate reduction ammonia production, the electrode material prepared by the invention can realize high-efficiency reduction of nitrate ammonia production after the reconstruction of the morphology structure, the ammonia production rate is higher than most of reported research results, and meanwhile, the electrode material also has good circulation stability.
The invention prepares the sol-gel by bismuth nitrate, ferric nitrate, glycol and citric acid, and the BiFeO is obtained by heat preservation and sintering 3 Perovskite catalytic material. Then BiFeO is carried out 3 The perovskite catalytic material is loaded on the surface of the hydrophilic carbon cloth treated by the acid solution, and the catalytic slurry can permeate the surface of the carbon cloth, so that BiFeO is carried out 3 The perovskite catalytic material is coated on one surface of the conductive substrate, so that the electrode slice used for producing ammonia by electrocatalytic reduction of nitrate can be obtained.
Because the morphology regulation of the material surface is mainly influenced by voltage, the electrode is subjected to morphology regulation to generate an elemental Bi material by introducing current into the electrode and controlling the voltage range to be 1.1-1.4V, and the elemental Bi material is used for electrocatalytic nitrate reduction to produce ammonia. BiFeO of the invention 3 The electrode prepared by the perovskite catalytic material has extremely high electrocatalytic activity for reducing nitrate to produce ammonia and cycle stability. BiFeO of the invention 3 The perovskite catalytic material improves the electrocatalytic performance based on morphology regulation under the action of cathode reduction, has high nitrate removal efficiency and ammonia production rate, and has important significance for harmless and recycling of nitrate.
The invention leads the electrode to have morphology regulation by introducing current into the electrode, and compared with the electrode without introducing current, the BiFeO after morphology regulation 3 The perovskite catalytic electrode performance is obviously improved. BiFeO of the invention 3 The perovskite catalytic material has excellent catalytic performance and good cycle stability. Not only solves the degradation problem of nitrate pollutants, but also generates valuable ammonia. Provides an extremely effective reference for the future recycling of energy sources, and has good prospect in practical application.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 shows BiFeO according to the first embodiment of the present invention 3 XRD pattern of perovskite catalytic material;
FIG. 2 shows BiFeO according to the first embodiment of the present invention 3 SEM images of perovskite catalytic material;
FIG. 3 is BiFeO according to embodiment five of the present invention 3 SEM image of perovskite catalytic material after morphology regulation;
FIG. 4 is a graph showing a constant current of 15mA/cm in accordance with a fifth embodiment of the invention 2 Lower BiFeO 3 An ammonia production effect diagram in the perovskite material electrode morphology regulation process;
FIG. 5 shows a sixth embodiment of the present invention in constant current modeUnder BiFeO 3 And (3) comparing ammonia nitrogen yield before and after the morphology of the perovskite material electrode is regulated.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one: biFeO 3 The preparation of the perovskite catalytic material electrode comprises the following specific steps:
step one: 3.02g of bismuth nitrate, 2.273g of ferric nitrate and 5.25g of citric acid are added into 30.58mL of glycol solution, the mixture is stirred uniformly, and the mixture is respectively kept at 80 ℃ and 120 ℃ in an oven for 10 hours to obtain a precursor.
Step two: placing the precursor in a porcelain boat, respectively preserving heat in a muffle furnace at 300 ℃ for 2 hours and at 700 ℃ for 3 hours, controlling the heating rate of the muffle furnace to be 5 ℃/min, and obtaining the dried BiFeO 3 Perovskite catalytic material.
Step three: weighing the dried BiFeO 3 Perovskite catalytic material, 0.9mL of ethanol, 100 microliters of Nafion binder solution (acting as a binder, commercially available product, manufacturer dupont) were mixed to obtain a catalyst slurry; brushing the catalyst slurry on one surface of a piece of hydrophilic carbon cloth (the manufacturer is Taiwan carbon energy science and technology Co., ltd.) with the size of 1.5cm multiplied by 1.0cm after acidification treatment; drying the brushed carbon cloth at 27 ℃ for 3 hours to obtain BiFeO 3 Perovskite catalytic material electrodes.
The preparation method of the hydrophilic carbon cloth comprises the following steps: adding concentrated sulfuric acid, concentrated nitric acid and deionized water into carbon cloth for treatment for 6-8 hours; the concentrated sulfuric acid: concentrated nitric acid: the mass ratio of deionized water is 1:1:1.
the BiFeO 3 The perovskite catalytic material electrode is an electrode for producing ammonia by electrocatalytic reduction of nitrate, and the catalyst slurry on hydrophilic carbon clothThe loading was 2.5mg/cm 2 。
Embodiment two: biFeO 3 The preparation of the perovskite catalytic material electrode comprises the following specific steps:
step one: 3.02g of bismuth nitrate, 2.273g of ferric nitrate and 5.25g of citric acid are added into 30.58mL of glycol solution, the mixture is stirred uniformly, and the mixture is respectively kept at 80 ℃ and 120 ℃ in an oven for 10 hours to obtain a precursor.
Step two: placing the precursor in a porcelain boat, respectively preserving heat in a muffle furnace at 300 ℃ for 2 hours and at 700 ℃ for 3 hours, controlling the heating rate of the muffle furnace to be 5 ℃/min, and obtaining the dried BiFeO 3 Perovskite catalytic material.
Step three: weighing the dried BiFeO 3 Mixing perovskite catalytic material, 0.9mL of ethanol and 100 microliters of Nafion binder solution to obtain catalyst slurry; brushing the catalyst slurry on a piece of hydrophilic carbon cloth with the size of 1.5cm multiplied by 1.0cm after acidification treatment; drying the brushed carbon cloth at 25 ℃ for 3 hours to obtain BiFeO 3 Perovskite catalytic material electrodes.
The preparation method of the hydrophilic carbon cloth comprises the following steps: adding concentrated sulfuric acid, concentrated nitric acid and deionized water into carbon cloth for treatment for 6-8 hours; the concentrated sulfuric acid: concentrated nitric acid: the mass ratio of deionized water is 1:1:1.
the BiFeO 3 The perovskite catalytic material electrode is an electrode for producing ammonia by electrocatalytic reduction of nitrate, and the loading capacity of catalyst slurry on hydrophilic carbon cloth is 3mg/cm 2 。
Embodiment III: biFeO 3 The preparation of the perovskite catalytic material electrode comprises the following specific steps:
step one: 3.02g of bismuth nitrate, 2.273g of ferric nitrate and 5.25g of citric acid are added into 30.58mL of glycol solution, the mixture is stirred uniformly, and the mixture is respectively kept at 80 ℃ and 120 ℃ in an oven for 10 hours to obtain a precursor.
Step two: placing the precursor in a porcelain boat, respectively preserving heat in a muffle furnace at 300 ℃ for 2 hours and at 700 ℃ for 3 hours, controlling the heating rate of the muffle furnace to be 5 ℃/min, and obtaining the dried BiFeO 3 Perovskite catalytic material.
Step three: weighing the dried BiFeO 3 Uniformly mixing perovskite catalytic material, 0.9mL of ethanol and 100 microliters of Nafion binder solution to obtain catalyst slurry; brushing the catalyst slurry on a piece of hydrophilic carbon cloth with the size of 1.5cm multiplied by 1.0cm after acidification treatment; drying the brushed carbon cloth at 30 ℃ for 3 hours to obtain BiFeO 3 Perovskite catalytic material electrodes.
The preparation method of the hydrophilic carbon cloth comprises the following steps: adding concentrated sulfuric acid, concentrated nitric acid and deionized water into carbon cloth for treatment for 6-8 hours; the concentrated sulfuric acid: concentrated nitric acid: the mass ratio of deionized water is 1:1:1.
the BiFeO 3 The perovskite catalytic material electrode is an electrode for producing ammonia by electrocatalytic reduction of nitrate, and the loading capacity of catalyst slurry on the hydrophilic carbon cloth is 3.5mg/cm 2 。
Embodiment four: biFeO 3 The preparation of the perovskite catalytic material electrode comprises the following specific steps:
step one: 3.02g of bismuth nitrate, 2.273g of ferric nitrate and 5.25g of citric acid are added into 30.58mL of ethylene glycol solution, stirred uniformly, and kept at 80 ℃ and 120 ℃ in an oven for 10 hours respectively to obtain a precursor.
Step two: placing the precursor in a porcelain boat, respectively preserving heat in a muffle furnace at 300 ℃ for 2 hours and at 700 ℃ for 3 hours, controlling the heating rate of the muffle furnace to be 5 ℃/min, and obtaining the dried BiFeO 3 Perovskite catalytic material.
Step three: weighing the dried BiFeO 3 Mixing perovskite catalytic material, 0.9mL of ethanol and 100 microliters of Nafion binder solution to obtain catalyst slurry; brushing the catalyst slurry on a piece of hydrophilic carbon cloth with the size of 1.5cm multiplied by 1.0cm after acidification treatment; drying the brushed carbon cloth at 30 ℃ for 3 hours to obtain BiFeO 3 Perovskite catalytic material electrodes.
The preparation method of the hydrophilic carbon cloth comprises the following steps: adding concentrated sulfuric acid, concentrated nitric acid and deionized water into carbon cloth for treatment for 6-8 hours; the concentrated sulfuric acid: concentrated nitric acid: the mass ratio of deionized water is 1:1:1.
the BiFeO 3 Calcium titaniumThe electrode of the ore catalytic material is an electrode for producing ammonia by electrocatalytic reduction of nitrate, and the loading capacity of catalyst slurry on the hydrophilic carbon cloth is 4.5mg/cm 2 。
Fifth embodiment: electrifying to regulate and control BiFeO 3 The morphology structure comprises the following specific steps:
morphology regulation is realized by connecting the catalytic material on the electrode with the voltage of the negative electrode, and the specific operation is as follows: biFeO prepared in example III 3 The perovskite catalytic material electrode is connected with 15mA/cm 2 Is subjected to morphology regulation under the condition of corresponding constant voltage of 1.4V, and the solution system is 50mM Na 2 SO 4 And 10mM NO 3 - Each hour is a cycle, and the effect of reducing nitrate to produce ammonia is shown in figure 4.
Conclusion: FIG. 4 is a graph showing a constant current of 15mA/cm in example five 2 Lower BiFeO 3 The graph shows that the ammonia production efficiency of the perovskite material electrode in the morphology regulation process is always changed, the selectivity is steadily improved, the current efficiency is obviously improved in the first 5 hours, and in addition, the graph shows that the catalyst still can show excellent ammonia production rate and ammonia production Faraday efficiency after 15 times of cycle tests, and the catalyst can work stably for a long time and reduce nitrate to produce ammonia efficiently. From the XRD patterns before and after the reaction and the SEM patterns before and after the reaction, the specific surface area of the electrode after the regulation and control is increased, and the new substance of the simple substance Bi is generated.
Example six:
taking BiFeO prepared in example three 3 The perovskite catalytic material electrode is tested by an electrochemical workstation, and the model is Chenhua chi760e, and the thickness is 15mA/cm 2 Before constant current magnitude testing, biFeO prepared in example three was prepared 3 The perovskite catalytic material electrode is connected with the negative electrode of the voltmeter, the platinum sheet counter electrode is connected with the positive electrode, the silver chloride is used as a reference electrode, and the electrolytic cell is an H-type electrolytic cell. After assembly, the mixture was taken up in 50mM Na 2 SO 4 ,NO 3 - The concentration of (C) was 0.1mol/L as the electrolyte, and the electrolysis time was 20 minutes. Electrocatalytic reduction of nitrate before and after morphology controlAcid salt ammonia production performance.
Conclusion: FIG. 5 shows BiFeO in constant current mode 3 The comparison graph of ammonia nitrogen yield before and after the morphology of the perovskite material electrode is regulated shows that the performance of the electrode after reconstruction compared with the electrode without reconstruction is obviously improved. BiFeO of the invention 3 The perovskite catalytic material has excellent catalytic performance and good cycle stability. The method not only solves the degradation problem of nitrate pollutants, but also generates valuable ammonia, thereby providing an extremely effective reference for the recycling of future energy sources and having good prospect in practical application.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. BiFeO 3 The preparation method of the perovskite catalytic electrode is characterized by comprising the following steps of: the method comprises the following steps:
step one: adding bismuth nitrate, ferric nitrate and citric acid into the glycol solution, and uniformly stirring to obtain a mixed solution; heating the mixed solution, and drying the water in the mixed solution to obtain dried sol-gel;
step two: sintering the dried sol gel to obtain dried BiFeO 3 A perovskite catalytic material;
step three: taking dried BiFeO 3 Uniformly mixing perovskite catalytic material, ethanol and Nafion binder solution to obtain catalyst slurry; coating the catalyst slurry on one surface of a conductive substrate, and drying to obtain BiFeO 3 Perovskite catalytic electrodes.
2. A BiFeO according to claim 1 3 The preparation method of the perovskite catalytic electrode is characterized by comprising the following steps of: the BiFeO 3 The perovskite catalytic electrode is subjected to morphology regulation treatment, a three-electrode system is adopted for morphology regulation, a platinum sheet is selected as a counter electrode, ag/AgCl is selected as a reference electrode, and 50mM Na is adopted as electrolyte 2 SO 4 And 10mM NO 3 - Introducing the catalytic electrode into the reactor at a concentration of 15-20mA/cm 2 The current of (2) is 8-12h, and the voltage is 1.1-1.4V.
3. A BiFeO according to claim 1 3 The preparation method of the perovskite catalytic electrode is characterized by comprising the following steps of: in the first step, raw material metal ions: ethylene glycol: the molar ratio of citric acid is 80:4:1, and Bi in metal ions: the molar ratio of Fe is 1:1.
4. a BiFeO according to claim 1 3 The preparation method of the perovskite catalytic electrode is characterized by comprising the following steps of: adding bismuth nitrate, ferric nitrate and citric acid into an ethylene glycol solution, and uniformly stirring to obtain a mixed solution; and (3) preserving the temperature of the mixed solution at 80-90 ℃ for 10-12 hours, and preserving the temperature of the mixed solution at 120 ℃ for 10-12 hours to obtain the dried sol-gel.
5. A BiFeO according to claim 1 3 The preparation method of the perovskite catalytic electrode is characterized by comprising the following steps of: in the second step, the dried sol-gel is kept at 300-330 ℃ for 2-3 hours, the temperature is raised to 700-720 ℃, the heat preservation is continued for 3-4 hours, and the temperature raising rate is controlled to be 5 ℃/min, so as to obtain the dried BiFeO 3 Perovskite catalytic material.
6. A BiFeO according to claim 1 3 The preparation method of the perovskite catalytic electrode is characterized by comprising the following steps of: in the third step, the conductive substrate is hydrophilic carbon cloth, and the preparation method of the hydrophilic carbon cloth comprises the following steps: adding concentrated sulfuric acid, concentrated nitric acid and deionized water into carbon cloth for treatment for 6-8 hours; the concentrated sulfuric acid: concentrated nitric acid: the mass ratio of deionized water is 1:1:1.
7. a BiFeO according to claim 1 3 The preparation method of the perovskite catalytic electrode is characterized by comprising the following steps of: the loading of the catalyst slurry on the conductive substrate is 2.5-4.5mg/cm 2 。
8. A BiFeO according to any one of claims 1-7 3 BiFeO prepared by perovskite catalytic electrode preparation method 3 Perovskite catalytic electrodes.
9. A BiFeO according to claim 8 3 The application of the perovskite catalytic electrode is characterized in that: the BiFeO 3 Perovskite catalytic electrodes are used to electro-catalyze nitrate reduction to produce ammonia.
10. A BiFeO according to claim 9 3 The application of the perovskite catalytic electrode is characterized in that: the electrocatalytic nitrate reduction ammonia production comprises the following steps: combining working electrode with BiFeO 3 The perovskite catalytic electrode is connected, a platinum sheet counter electrode and silver chloride are used as reference electrodes, nitrate is used as raw material, and the electrolysis time is 20-30min, so as to obtain ammonia.
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