CN114572940A - Preparation method of iron-nickel bimetallic selenide nanosphere electrocatalyst - Google Patents
Preparation method of iron-nickel bimetallic selenide nanosphere electrocatalyst Download PDFInfo
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- 239000010411 electrocatalyst Substances 0.000 title claims abstract description 62
- 239000002077 nanosphere Substances 0.000 title claims abstract description 58
- 150000003346 selenoethers Chemical class 0.000 title claims abstract description 40
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 40
- 239000011669 selenium Substances 0.000 claims description 22
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 10
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 7
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 6
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052711 selenium Inorganic materials 0.000 claims description 4
- 238000005119 centrifugation Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract description 12
- 229910001868 water Inorganic materials 0.000 abstract description 10
- 230000003197 catalytic effect Effects 0.000 abstract description 7
- 239000003054 catalyst Substances 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 6
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 238000000975 co-precipitation Methods 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- HTXDPTMKBJXEOW-UHFFFAOYSA-N iridium(IV) oxide Inorganic materials O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229920000557 Nafion® Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 239000000976 ink Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000000024 high-resolution transmission electron micrograph Methods 0.000 description 2
- 238000004502 linear sweep voltammetry Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000970 chrono-amperometry Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000001453 impedance spectrum Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000013354 porous framework Substances 0.000 description 1
- QHASIAZYSXZCGO-UHFFFAOYSA-N selanylidenenickel Chemical compound [Se]=[Ni] QHASIAZYSXZCGO-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- -1 transition metal nickel oxides Chemical class 0.000 description 1
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B19/00—Selenium; Tellurium; Compounds thereof
- C01B19/002—Compounds containing, besides selenium or tellurium, more than one other element, with -O- and -OH not being considered as anions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C25B1/04—Hydrogen or oxygen by electrolysis of water
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Abstract
The invention provides a preparation method and application of an efficient iron-nickel bimetallic selenide nanosphere electrocatalyst. Dissolving flake NaOH in deionized water, stirring until the solution is clear, adding Se powder and N2H4·H2O and stirring, then adding Ni (NO)3)2·6H2O and Fe (NO)3)3·9H2And O powder is stirred again, the obtained suspension is centrifuged and washed by deionized water and absolute ethyl alcohol, and then the suspension is placed into a drying box to be dried, and the obtained product is the high-efficiency Fe-Ni bimetallic selenide nanosphere electrocatalyst. Compared with the prior art, the method has the advantages that the regulation synthesis is prepared in one step by a coprecipitation methodThe efficient iron-nickel bimetallic selenide nanosphere electrocatalyst is simple and convenient in preparation process, the obtained catalyst has higher catalytic activity and stability, the overpotential of the oxygen evolution reaction of electrolyzed water can be reduced to 227mV through the synergistic effect of Se, Fe and Ni, the electrochemical stability is greatly improved, and the catalyst has wide application prospects in the aspects of water decomposition, large-capacity energy storage equipment and the like.
Description
Technical Field
The invention belongs to the technical field of electrocatalysts, and particularly relates to a preparation method of an iron-nickel bimetallic selenide nanosphere electrocatalyst.
Background
With the large consumption of fossil fuels, energy shortage and environmental pollution are threatening the development of society and the progress of civilization. Therefore, development of new energy sources to alleviate the energy demand is urgently required. Hydrogen energy is a promising substitute for conventional energy sources because of its advantages of environmental protection, high energy density, low cost, etc., and is a new energy source. Electrochemical water splitting as an efficient hydrogen production technique consists of two important half-reactions: oxygen evolution reaction and hydrogen evolution reaction. The four-electron transport process of the anodic half-reaction, i.e. the oxygen evolution reaction, is more complex and kinetically retarded compared to the two-electron transport process of the cathode. Therefore, the oxygen evolution reaction process is one of the most important obstacles to achieving water decomposition. Conventional commercial catalyst (RuO)2、IrO2Pt/C, etc.) have severely limited large-scale applications due to their high cost, unstable catalysts, etc. Therefore, the research on the non-metal-based electrocatalyst is particularly important.
Recently, transition metal nickel oxides, hydroxides, sulfides, and particularly selenide electrocatalysts have shown excellent electrocatalytic potential at lower overpotentials and have been extensively studied. The Se element not only has the same valence electrons but also exhibits stronger metallic properties, which means that it has better conductivity and electrocatalytic activity, compared to S and O. However, nickel selenide, as a semiconductor material, has poor conductivity, which is a negative characteristic for electrocatalysts. The iron element can be doped to enhance the electronic conductivity and increase the active sites, and the catalytic activity of the material can be improved through the synergistic effect between iron and nickel. Therefore, the research on the iron element doped in the nickel-based selenide has a great prospect.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems occurring in the prior art.
Therefore, the invention aims to provide a preparation method of the iron-nickel bimetallic selenide nanosphere electrocatalyst.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions: a preparation method of iron-nickel bimetallic selenide nanosphere electrocatalyst comprises,
adding selenium powder and hydrazine hydrate into alkali liquor, stirring, adding a nickel source and an iron source, stirring uniformly, then centrifugally washing, and drying to obtain the nanosphere electrocatalyst.
As a preferable scheme of the preparation method of the iron-nickel bimetallic selenide nanosphere electrocatalyst, the preparation method comprises the following steps: the selenium powder and hydrazine hydrate are added into alkali liquor and stirred, and 0.4-0.8 g of selenium powder and 15-20mL of hydrazine hydrate are added into the alkali liquor.
As a preferable scheme of the preparation method of the iron-nickel bimetallic selenide nanosphere electrocatalyst, the preparation method comprises the following steps: the alkali liquor is sodium hydroxide solution, the concentration is 5-7 g/mL, and the addition volume is 100-150 mL.
The iron-nickel bimetallic selenium is used as the iron-nickel bimetallic seleniumA preferred embodiment of the preparation method of the compound nanosphere electrocatalyst, wherein: the nickel source is Ni (NO)3)2·6H2O; the iron source is Fe (NO)3)3·9H2O。
As a preferable scheme of the preparation method of the iron-nickel bimetallic selenide nanosphere electrocatalyst, the preparation method comprises the following steps: the atomic ratio of the nickel source to the iron source to the selenium to the nickel to the iron is 0.5: 0 to 0.93: 0 to 1.3.
As a preferable scheme of the preparation method of the iron-nickel bimetallic selenide nanosphere electrocatalyst, the preparation method comprises the following steps: the stirring is uniform, and the stirring time is 2-5 h.
As a preferable scheme of the preparation method of the iron-nickel bimetallic selenide nanosphere electrocatalyst, the preparation method comprises the following steps: the centrifugal washing is to respectively use deionized water and absolute ethyl alcohol for centrifugation and washing for 3 times.
As a preferable scheme of the preparation method of the iron-nickel bimetallic selenide nanosphere electrocatalyst, the preparation method comprises the following steps: and drying at the drying temperature of 60-80 ℃ for 12-18 h.
As a preferred scheme of the nanosphere electrocatalyst prepared by the preparation method of the iron-nickel bimetallic selenide nanosphere electrocatalyst, the preparation method comprises the following steps: the overpotential of the nanosphere electrocatalyst for the oxygen evolution reaction is 227mV, and the current density is stably maintained at 10-15 mA/cm within 24h2。
The invention has the beneficial effects that:
the invention provides a preparation method and application of an efficient iron-nickel bimetallic selenide nanosphere electrocatalyst. Compared with the prior art, the high-efficiency Fe-Ni bimetallic selenide nanosphere electrocatalyst is prepared, regulated and synthesized in one step by a coprecipitation method, the preparation process is simple and convenient, the obtained catalyst has higher catalytic activity and stability, the overpotential of the electrolyzed water oxygen evolution reaction can be reduced to 227mV by the synergistic effect of Se, Fe and Ni, the electrochemical stability is greatly improved, and the high-efficiency Fe-Ni bimetallic selenide nanosphere electrocatalyst has wide application prospects in the aspects of water decomposition, large-capacity energy storage equipment and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 shows an example of Fe-Ni bimetallic selenide Fe according to the present invention0.17Ni0.83Se2SEM image of nanosphere electrocatalyst;
FIG. 2 shows an example of Fe-Ni bimetallic selenide Fe0.17Ni0.83Se2HRTEM images of nanosphere electrocatalysts;
FIG. 3 shows a high efficiency Fe-Ni bimetallic selenide Fe of an embodiment of the present invention0.17Ni0.83Se2Nanosphere electrocatalyst and comparative example IrO2Electrocatalytic linear scan polarization curve;
FIG. 4 shows a high efficiency Fe-Ni bimetallic selenide Fe in accordance with an embodiment of the present invention0.17Ni0.83Se2Nanosphere electrocatalyst and comparative example IrO2An electrocatalytic impedance profile;
FIG. 5 shows a high efficiency Fe-Ni bimetallic selenide Fe in accordance with an embodiment of the present invention0.17Ni0.83Se2Nanosphere electrocatalyst and comparative example IrO2Chronoamperometric profile of oxygen evolution reaction.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with examples are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The chemical reagents used in the examples of the present invention are all commercially available analytical reagents unless otherwise specified. Nafion used in the examples was purchased from Tansoole.com, damas-beta; commercial IrO2Electrocatalysts were purchased from tancool, com, damas-beta.
The test of the embodiment of the invention is carried out in a CHI660e electrochemical workstation and a three-electrode system in a 1M KOH solution, and the test method is as follows:
using Shanghai Hua CHI660e electrochemical workstation, selecting CV by a program, sweeping the potential range of-0.3-0.9V (vs. RHE) at the sweep speed of 100mV/s, and circulating for 100 circles to activate;
linear sweep voltammetry test: the program selects LSV, the potential range is-0.3-0.9V (vs. RHE), and the sweep rate is 5 mV/s.
And (3) impedance testing: the program selects IMP with a voltage of 200mV (vs. RHE) and a frequency range of 1000000-0.1 HZ.
And (3) testing a curve by a chronoamperometry: the program selects i-t, the voltage is 242mV (vs. RHE), and the time is 24 h.
Example 1:
8g of sodium hydroxide flakes were dissolved in 120mL of deionized water and stirred until the solution was clear.
0.5g of Se powder and 20mL of N2H4·H2O was added to the above solution and stirred for 0.5 h.
0.75g of Ni (NO) was added3)2·6H2O and 0.26g Fe (NO)3)3·9H2O powder, and stirring for 3h again.
And (3) respectively centrifuging and washing the nano-spheres by using deionized water and absolute ethyl alcohol for 3 times, and then drying the nano-spheres in a drying oven at 70 ℃ for 16 hours to obtain the product, namely the high-efficiency Fe-Ni bimetallic selenide nano-sphere electrocatalyst.
The prepared nanosphere electrocatalyst is detected by SEM images and HRTEM images, and the results are shown in figures 1 and 2. The nano-sphere electrocatalyst is found to be a porous framework consisting of nano-microspheres with uniformly distributed elements, so that the active sites and the electron transmission rate are increased, and Fe can be clearly seen0.17Ni0.83Se2Also indicates Fe0.17Ni0.83Se2Nanospheres were successfully prepared.
Example 2:
inks were made and tested for electrochemical performance. Taking 5mg of the prepared iron-nickel bimetallic selenide nanosphere electrocatalyst, adding 25ul of Nafion,200ul of deionized water and 800ul of absolute ethyl alcohol, carrying out ultrasonic treatment for 30min, dropping 250ul of ink on foamed nickel with the area of 1 multiplied by 1.5cm, and carrying out vacuum drying for 4h at 60 ℃, wherein all tests are carried out by using Chenghua CHI760E electrochemical workstation, the test temperature is room temperature, the electrolyte is 1M KOH solution, and the iR is compensated by 95%.
IrO for commercial fetching25mg of electrocatalyst, 25ul of Nafion,200ul of deionized water and 800ul of absolute ethyl alcohol are added, ultrasonic treatment is carried out for 30min, 250ul of ink is dropped on foamed nickel with the area of 1 multiplied by 1.5cm, vacuum drying is carried out for 4h at 60 ℃, all tests are carried out by using Chenghua CHI760E electrochemical workstation, the test temperature is room temperature, the electrolyte is 1M KOH solution, and iR is compensated by 95%.
The experimental results are shown in fig. 3 and 4. From FIG. 3, Fe can be clearly seen0.17Ni0.83Se2The reaction of the nanosphere electrocatalyst on oxygen evolution is only over potential of 227mV, while IrO2The overpotential of the electrocatalyst was 351mV, which indicates Fe0.17Ni0.83Se2The nanosphere electrocatalyst has higher OER catalytic activity. FIG. 4 is an impedance spectrum of electrocatalysis, from which Fe is evident0.17Ni0.83Se2Half-circle radius ratio IrO corresponding to nanosphere electrocatalyst2The corresponding semi-circle radius is much smaller, which indicates that Fe is in the process of oxygen evolution reaction0.17Ni0.83Se2The nanosphere electrocatalyst has better catalytic activity.
FIG. 5 shows the example Fe-Ni bimetallic selenide prepared0.17Ni0.83Se2The timing current curve of the oxygen evolution reaction of the nanosphere electrocatalyst can be clearly seen from the graph0.17Ni0.83Se2The catalytic activity of the nanosphere electrocatalyst is slowly improved along with the oxygen evolution reaction, which indicates that Fe0.17Ni0.83Se2The nanosphere electrocatalyst has excellent electrochemical stability during oxygen evolution reaction.
Example 3:
removing Se powder and Ni (NO)3)2·6H2O and Fe (NO)3)3·9H2The procedure of the experiment was the same as in example 1 except that the amount of O added was changed. Se powder, Ni (NO)3)2·6H2O and Fe (NO)3)3·9H2The addition amount of O and the performance data of the obtained product nanosphere electrocatalyst are shown in Table 1.
TABLE 1
Through example 1, example 3 and table 1, it can be found that the overpotentials of the products prepared by Fe, Ni and Se with different atomic ratios also have a certain difference. Although the overpotential of the product can be reduced to 300mV or less when the Ni atomic ratio is 0, when the Fe/Ni atomic ratio is 17: and 83, the overpotential is reduced to 227mV, and Fe and Ni are synergized under the mixture ratio, so that an unexpected technical effect is achieved.
The invention provides a preparation method and application of an efficient iron-nickel bimetallic selenide nanosphere electrocatalyst. Compared with the prior art, the high-efficiency Fe-Ni bimetallic selenide nanosphere electrocatalyst is prepared, regulated and synthesized in one step by a coprecipitation method, the preparation process is simple and convenient, the obtained catalyst has higher catalytic activity and stability, the overpotential of the electrolyzed water oxygen evolution reaction can be reduced to 227mV by the synergistic effect of Se, Fe and Ni, the electrochemical stability is greatly improved, and the high-efficiency Fe-Ni bimetallic selenide nanosphere electrocatalyst has wide application prospects in the aspects of water decomposition, large-capacity energy storage equipment and the like.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. A preparation method of an iron-nickel bimetallic selenide nanosphere electrocatalyst is characterized by comprising the following steps of: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
adding selenium powder and hydrazine hydrate into alkali liquor, stirring, adding a nickel source and an iron source, stirring uniformly, then centrifugally washing, and drying to obtain the nanosphere electrocatalyst.
2. The method for preparing the iron-nickel bimetallic selenide nanosphere electrocatalyst according to claim 1, wherein: the selenium powder and hydrazine hydrate are added into alkali liquor and stirred, and 0.4-0.8 g of selenium powder and 15-20mL of hydrazine hydrate are added into the alkali liquor.
3. The method for preparing the iron-nickel bimetallic selenide nanospheres electrocatalyst according to claim 1 or 2, characterized in that: the alkali liquor is a sodium hydroxide solution, the concentration of the alkali liquor is 5-10 g/mL, and the addition volume of the alkali liquor is 100-150 mL.
4. The method for preparing the iron-nickel bimetallic selenide nanosphere electrocatalyst according to claim 1, wherein: the nickel source is Ni (NO)3)2·6H2O; the iron source is Fe (NO)3)3·9H2O。
5. The method for preparing the iron-nickel bimetallic selenide nanosphere electrocatalyst according to claim 1 or 4, wherein: the atomic ratio of the nickel source to the iron source to the selenium to the nickel to the iron is 0.5: 0 to 0.93: 0 to 1.3.
6. The method for preparing the iron-nickel bimetallic selenide nanosphere electrocatalyst according to claim 1, wherein: the stirring is uniform, and the stirring time is 2-5 h.
7. The method for preparing the iron-nickel bimetallic selenide nanosphere electrocatalyst according to claim 1, wherein: the centrifugal washing is to respectively use deionized water and absolute ethyl alcohol for centrifugation and washing for 3 times.
8. The method for preparing the iron-nickel bimetallic selenide nanosphere electrocatalyst according to claim 1, wherein: and drying at the drying temperature of 60-80 ℃ for 12-18 h.
9. The nanosphere electrocatalyst prepared by the method for preparing the iron-nickel bimetallic selenide nanosphere electrocatalyst according to any one of claims 1 to 8, wherein the nanosphere electrocatalyst is characterized in that: the overpotential of the nanosphere electrocatalyst for the oxygen evolution reaction is 227mV, and the current density is stably maintained at 10-15 mA/cm within 24h2。
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| WO2011116788A1 (en) * | 2010-03-25 | 2011-09-29 | Saint Petersburg State University | Layered titanates |
| CN110938831A (en) * | 2019-11-14 | 2020-03-31 | 湖南理工学院 | Foam alloy-based iron-doped NiSe microsphere electrocatalytic material and preparation method thereof |
| CN114016073A (en) * | 2021-10-25 | 2022-02-08 | 吉林师范大学 | Fe-doped Ni0.85Preparation method of Se nanosheet array electrocatalyst |
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| WO2011116788A1 (en) * | 2010-03-25 | 2011-09-29 | Saint Petersburg State University | Layered titanates |
| CN110938831A (en) * | 2019-11-14 | 2020-03-31 | 湖南理工学院 | Foam alloy-based iron-doped NiSe microsphere electrocatalytic material and preparation method thereof |
| CN114016073A (en) * | 2021-10-25 | 2022-02-08 | 吉林师范大学 | Fe-doped Ni0.85Preparation method of Se nanosheet array electrocatalyst |
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