CN113584501A - Bi for electrocatalytic reduction2O2CO3Preparation method of NS material - Google Patents
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- 239000000463 material Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 14
- 239000000243 solution Substances 0.000 claims abstract description 70
- 238000004070 electrodeposition Methods 0.000 claims abstract description 27
- 238000006722 reduction reaction Methods 0.000 claims abstract description 25
- 238000007747 plating Methods 0.000 claims abstract description 24
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims abstract description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011259 mixed solution Substances 0.000 claims abstract description 17
- 239000011736 potassium bicarbonate Substances 0.000 claims abstract description 15
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000003792 electrolyte Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process 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
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 12
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 11
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 11
- 239000002135 nanosheet Substances 0.000 claims description 8
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 21
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000007806 chemical reaction intermediate Substances 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 16
- 235000019253 formic acid Nutrition 0.000 description 13
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000002659 electrodeposit Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
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- 229910052793 cadmium Inorganic materials 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 235000019441 ethanol Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a Bi for electrocatalytic reduction2O2CO3A method of making an NS material, comprising: s1, synthesizing a BiOINS material; adding nitric acid into KI solution to adjust pH value to a first preset value, and adding Bi (NO)3)3·5H2O and stirring to obtain a mixed solution; mixing the mixed solution with a benzoquinone-containing absolute ethyl alcohol solution to obtain a plating solution; carrying out electrodeposition on the plating solution, and washing the obtained electrodeposition with deionized water and drying to obtain the BiOINS material; s2, synthesizing Bi2O2CO3NS material; the obtained BiOI NS material is used as a working electrode, and CO is used2Saturated KHCO3The solution is used as an electrolyte to carry out a reduction reaction in a three-electrode system to obtain the Bi2O2CO3NS material. Bi of the present invention2O2CO3The NS material is beneficial to the adsorption of reaction intermediates, and reaction active sites are rich.
Description
Technical Field
The invention relates to the technical field of preparation of electrocatalytic materials, in particular to Bi for electrocatalytic reduction2O2CO3A preparation method of NS material.
Background
Electrochemical CO2The method provides a high-efficiency and green strategy for solving the energy and environmental problems which puzzle the human society at present. It can utilize the electric energy generated by renewable energy sources to drive CO2And (3) electrochemical fixation, and converting the electrochemical fixation into a high value-added chemical product. However, electrochemical CO2Reduction currently faces a number of challenges, including slow reaction kinetics, competing reactions with hydrogen evolution, and low selectivity to the target product. Thus, the development of economical, stable, efficient CO2The reduction of the electrocatalytic material is the key to realizing the large-scale application of the electrochemical CO2 reduction technology. CO22The reduction reaction path is complex, and the products are numerous. C containing two or more carbon atoms at market price2+The products (such as ethylene, ethanol, propanol, etc.) have higher industrial value, but according to the current state of the art, the reaction selectivity of long-chain products containing multiple carbon atoms is too low to meet the requirements of industrial production. Therefore, the production of small molecule chemical products such as carbon monoxide or formic acid by electrochemical CO2 reduction techniques is currently the most practical solution.
However, in a number of electrocatalytic CO2In the catalyst for preparing HCOOH by reduction, a plurality of heavy metal (Pd, Cd and Hg) catalysts have high toxicity and are harmful to the environment, and cannot be practically applied. Although much attention has been paid to the preparation of HCOOH by means of metallic Bi catalysts, the selectivity of HCOOH catalysis is relatively low and is often accompanied by more H2And CO product formation, further improvements are needed.
Disclosure of Invention
The invention aims to provide Bi for electrocatalytic reduction2O2CO3The preparation method of the NS material solves the problem that the existing Bi-based catalyst reduces CO electrochemically2The reaction for preparing HCOOH has poor selectivity and low activity.
To achieve the above object, the present invention provides Bi for electrocatalytic reduction2O2CO3A method of making an NS material, comprising:
s1, synthesizing a BiOI NS material;
adding nitric acid into KI solution to adjust pH value to a first preset value, and adding Bi (NO)3)3·5H2O and stirring to obtain a mixed solution;
mixing the mixed solution with a benzoquinone-containing absolute ethyl alcohol solution to obtain a plating solution;
carrying out electrodeposition on the plating solution, and washing and drying the obtained electrodeposition with deionized water to obtain the BiOI NS material;
s2, synthesizing Bi2O2CO3NS material;
the obtained BiOI NS material is used as a working electrode, and CO is used2Saturated KHCO3The solution is used as an electrolyte to carry out a reduction reaction in a three-electrode system to obtain the Bi2O2CO3NS material.
According to one aspect of the invention, in the step S1, nitric acid is added into the KI solution to adjust the pH value to a first preset value, wherein the first preset value is 1.5-2.
In accordance with one aspect of the present invention, in step S1, Bi (NO) is added3)3·5H2O and in the stirring step, Bi (NO) is added3)3·5H2The molar ratio of the O to the KI solution is 1: 5-20, and the stirring time is 10-30 min.
According to one aspect of the invention, in the step S1, the concentration of the KI solution is 0.2-0.6 mol/L.
According to one aspect of the present invention, in the step of mixing the mixed solution with the benzoquinone-containing absolute ethyl alcohol solution to obtain the plating solution, the concentration of the benzoquinone in the benzoquinone-containing absolute ethyl alcohol solution is 0.1 to 0.5mol/L in step S1;
the volume ratio of the mixed solution to the benzoquinone-containing absolute ethyl alcohol solution is 2-5: 1.
According to one aspect of the present invention, in the step of electrodepositing the plating solution, and rinsing and drying the obtained electrodeposit with deionized water to obtain the BiOI NS material, in step S1, the plating solution is electrodeposited using an electrodeposition system;
the electrodeposition system comprises: a working electrode, a counter electrode and a reference electrode;
the working electrode is made of carbon paper, the counter electrode is made of a platinum sheet, and the reference electrode is made of saturated Ag/AgCl;
according to an aspect of the invention, in the step S1, in the step of performing electrodeposition on the plating solution, the electrodeposition time is 1-10 min;
in the step of carrying out electrodeposition on the plating solution, the voltage applied to the working electrode of the electrodeposition system is-1 to-0.01V vs.
According to an aspect of the invention, in step S2, the three-electrode system includes: a working electrode, a counter electrode and a reference electrode;
with CO2Saturated KHCO3In solution, KHCO3The concentration of the solution is 0.1-1 mol/L.
According to one aspect of the invention, in step S2, the obtained BiOI NS material is used as a working electrode, and CO is added2Saturated KHCO3The solution is used as an electrolyte to carry out a reduction reaction in a three-electrode system to obtain the Bi2O2CO3In the step of NS material, applying a bias voltage of-1 to-2V vs. Ag/AgCl on a working electrode of the three-electrode system for 10-60 min, taking out the reduced working electrode, and drying the working electrode in the air at the temperature of 60-100 ℃ for 30-60 min to obtain the Bi2O2CO3NS material.
To achieve the above object, the present invention provides a method for manufacturing a semiconductor deviceBi prepared by the preparation method2O2CO3NS material of said Bi2O2CO3The NS material is of a petal-shaped nanosheet structure.
According to one embodiment of the present invention, Bi prepared by the present invention2O2CO3The NS material has a large amount of Bi-O bonds, which is beneficial to the adsorption of reaction intermediates, and the ultrathin petal-shaped nanosheet structure provides rich reaction active sites, reduces the contact resistance and is beneficial to CO2Activation and shortening of the diffusion distance of the electrolyte.
According to one embodiment of the present invention, Bi prepared by the present invention2O2CO3NS material in CO2In the process of preparing formic acid (HCOOH) by reduction, the reaction path is simpler, only two electrons are transferred, the energy consumption in the process of preparing formic acid is effectively saved, and the production cost is reduced.
According to one scheme of the invention, through the enhancement of a Bi-O structure and the formation of a petal-shaped nanosheet structure, the adsorption of reaction intermediates (COOH and OCHO) is enhanced and active sites are increased. The petal-shaped Bi2O2CO3The preparation process of the nano sheet is simple and rapid, and the petal-shaped Bi2O2CO3The nano-sheets are directly prepared on the carbon paper in situ through electrochemical deposition and post-treatment, and compared with a hydrothermal method, the nano-sheets avoid the use of an adhesive, so that the impedance is effectively reduced, and the reaction active sites are prevented from being buried.
Drawings
FIG. 1 schematically shows Bi according to an embodiment of the present invention2O2CO3Preparing a block diagram of the NS material;
FIG. 2 schematically shows Bi according to an embodiment of the present invention2O2CO3A flow chart for the preparation of NS material;
fig. 3 schematically shows a scanning electron micrograph of a BiOI NS material according to an embodiment of the present invention;
FIG. 4 schematically shows an embodiment according to the inventionBi of embodiment mode2O2CO3Scanning electron micrographs of the NS material;
FIG. 5 schematically shows Bi according to an embodiment of the present invention2O2CO3Electrochemical reduction of CO over NS2Products (HCOOH, CO, H) at different voltages in the reaction for producing HCOOH2) Selectivity of (2).
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below.
Referring to FIGS. 1 and 2, in accordance with one embodiment of the present invention, Bi for electrocatalytic reduction according to the present invention2O2CO3A method of making an NS material, comprising:
s1, synthesizing a BiOI NS material;
adding nitric acid into KI solution to adjust pH value to a first preset value, and adding Bi (NO)3)3·5H2O and stirring to obtain a mixed solution;
mixing the mixed solution with an absolute ethyl alcohol solution containing benzoquinone to obtain a plating solution;
electrodepositing the plating solution, and rinsing the obtained electrodeposit with deionized water and drying to obtain the BiOI NS material (shown in figure 3);
s2, synthesizing Bi2O2CO3NS material;
the obtained BiOI NS material is used as a working electrode, and CO is used2Saturated KHCO3Bi is obtained by reduction reaction in a three-electrode system with solution as electrolyte2O2CO3NS material (see fig. 4).
According to an embodiment of the invention, in step S1, nitric acid is added to the KI solution to adjust the pH value to a first preset value, where the first preset value is 1.5-2.
According to one embodiment of the present invention, in step S1, Bi (NO) is added3)3·5H2O and in the stirring step, Bi (N) is addedO3)3·5H2The molar ratio of the O to the KI solution is 1: 5-20, and the stirring time is 10-30 min.
According to an embodiment of the invention, in the step S1, the concentration of the KI solution is 0.2-0.6 mol/L.
Through the arrangement, the materials participating in the reaction are arranged in the range, so that the normal operation of the reaction is effectively ensured, the product meeting the requirements is generated, and the reaction efficiency is improved.
According to one embodiment of the present invention, in the step of mixing the mixed solution with the benzoquinone-containing absolute ethanol solution to obtain the plating solution in step S1, the concentration of benzoquinone in the benzoquinone-containing absolute ethanol solution is 0.1 to 0.5 mol/L;
the volume ratio of the mixed solution to the benzoquinone-containing absolute ethanol solution is 2-5: 1.
Through the arrangement, the materials participating in the reaction are arranged in the range, so that the normal operation of the reaction is effectively ensured, the product meeting the requirements is generated, and the reaction efficiency is improved.
According to one embodiment of the present invention, in the step of electrodepositing the plating solution, and rinsing and drying the obtained electrodeposition with deionized water to obtain the BiOI NS material, the plating solution is electrodeposited using an electrodeposition system in step S1;
the electrodeposition system comprises: a working electrode, a counter electrode and a reference electrode;
the working electrode is made of carbon paper, the counter electrode is made of a platinum sheet, and the reference electrode is made of saturated Ag/AgCl;
according to an embodiment of the present invention, in the step S1, in the step of performing electrodeposition on the plating solution, the electrodeposition time is 1-10 min;
in the step of electrodepositing the plating solution, the voltage applied to the working electrode of the electrodeposition system is-1 to-0.01V vs. Ag/AgCl (i.e., the potential relative to the reference electrode is-1 to-0.01V).
According to one embodiment of the present invention, in step S2, the three-electrode system includes: a working electrode, a counter electrode and a reference electrode;
with CO2Saturated KHCO3In solution, KHCO3The concentration of the solution is 0.1-1 mol/L.
Through the arrangement, the materials participating in the reaction are arranged in the range, so that the normal operation of the reaction is effectively ensured, the product meeting the requirements is generated, and the reaction efficiency is improved.
According to one embodiment of the present invention, in step S2, the BiOI NS material obtained is used as the working electrode, and CO is added2Saturated KHCO3Bi is obtained by reduction reaction in a three-electrode system with solution as electrolyte2O2CO3In the step of NS material, a bias voltage of-1 to-2V is applied to a working electrode of a three-electrode system for 10-60 min, and then the reduced working electrode is taken out and dried in air at the temperature of 60-100 ℃ for 30-60 min to prepare Bi2O2CO3NS material. In this embodiment, the counter electrode is made of platinum sheet and the reference electrode is made of saturated Ag/AgCl.
Through the arrangement, the materials participating in the reaction are arranged in the range, so that the normal operation of the reaction is effectively ensured, the product meeting the requirements is generated, and the reaction efficiency is improved.
As shown in FIG. 4, according to one embodiment of the present invention, Bi prepared by the foregoing preparation method is used in the present invention2O2CO3In NS material, the Bi2O2CO3The NS material is of a petal-shaped nanosheet structure.
To further illustrate the present invention, the embodiments of the present application are illustrated in conjunction with the accompanying drawings.
Example 1
1.Bi2O2CO3Preparation of NS (refer to FIG. 2)
(1) Synthesis of BiOI NS
Firstly, adding HNO into KI solution3Adjusting pH to 1.7, stirring, and adding Bi (NO)3)3·5H2O, stirring for 15min to obtain a mixed solution; the concentration of the KI solution is 0.4 mol/L; added Bi (NO)3)3·5H2The molar ratio of O to KI is 1: 10;
and secondly, mixing the mixed solution obtained in the first step with an absolute ethyl alcohol solution of benzoquinone, wherein the concentration of the benzoquinone is 0.23mol/L, and the volume ratio of the mixed solution to the absolute ethyl alcohol solution is 2.5:1, and stirring to obtain the plating solution. And then carrying out electrodeposition for 5min, wherein the electrodeposition system is as follows: carbon Paper (CP) is used as a Working Electrode (WE), a platinum sheet is used as a Counter Electrode (CE), saturated Ag/AgCl is used as a Reference Electrode (RE), and the voltage applied to the working electrode is-0.01V; after the electrodeposition was completed, the substrate was rinsed with deionized water and dried in air to obtain BiOI NS as shown in FIG. 3.
(2) Synthesis of Bi2O2CO3 NS
In the same three-electrode system as the step (1), the BiOI NS prepared in the step (1) is used as a working electrode and CO is used2Saturated 0.5mol/L KHCO3Applying an external bias of-2V for 30min by using the solution as an electrolyte, immediately taking out the reduced working electrode, and drying at 60 ℃ for 30min in the air to prepare Bi2O2CO3NS, as shown in FIG. 4.
Example 2
Using the above-mentioned Bi2O2CO3Electrochemical reduction of CO over NS2HCOOH preparation test:
(1) in an H-type electrolytic cell, Bi is constructed2O2CO3NS material as working electrode, platinum sheet as counter electrode, saturated Ag/AgCl as reference electrode, and CO2Saturated 0.5mol/L KHCO3And (3) carrying out an I-t test for 40min on a three-electrode system of the electrolyte under the external bias of applying different voltages (-1.1, -1.2, -1.3, -1.4 … … -1.8V vs. Ag/AgCl) on a working electrode.
(2) Under the condition of the step (1), detecting the concentration of HCOOH in the electrolyte by using ion chromatography, and calculating the electro-reduction CO under different voltages2Faraday efficiency of HCOOH production; simultaneously, the gas chromatograph is used for sampling, detecting and analyzing the generated H at fixed time2And the amount of CO, calculating the H generated at different voltages2And the faradaic efficiency of CO, as shown in figure 5.
From Bi2O2CO3Electrocatalytic reduction of CO over NS2As can be seen from the test results, Bi2O2CO3NS efficiently converts CO2Electrocatalytic reduction to HCOOH. The Faraday efficiency of HCOOH is maintained at 90% within a wide voltage window (-1.5 to-1.8V vs. Ag/AgCl), and only a small amount of CO and H2And (4) generating.
The foregoing is merely exemplary of particular aspects of the present invention and devices and structures not specifically described herein are understood to be those of ordinary skill in the art and are intended to be implemented in such conventional ways.
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Bi for electrocatalytic reduction2O2CO3A method of making an NS material, comprising:
s1, synthesizing a BiOI NS material;
adding nitric acid into KI solution to adjust pH value to a first preset value, and adding Bi (NO)3)3·5H2O and stirring to obtain a mixed solution;
mixing the mixed solution with a benzoquinone-containing absolute ethyl alcohol solution to obtain a plating solution;
carrying out electrodeposition on the plating solution, and washing and drying the obtained electrodeposition with deionized water to obtain the BiOI NS material;
s2, synthesizing Bi2O2CO3NS material;
the obtained BiOI NS material is used as a working electrode, and CO is used2Saturated KHCO3The solution is used as an electrolyte to carry out a reduction reaction in a three-electrode system to obtain the Bi2O2CO3NS material.
2. The preparation method according to claim 1, wherein in step S1, nitric acid is added into the KI solution to adjust the pH value to a first preset value, and the first preset value is 1.5-2.
3. The method according to claim 2, wherein in step S1, Bi (NO) is added3)3·5H2O and in the stirring step, Bi (NO) is added3)3·5H2The molar ratio of the O to the KI solution is 1: 5-20, and the stirring time is 10-30 min.
4. The method according to any one of claims 1 to 3, wherein in step S1, the KI solution has a concentration of 0.2 to 0.6 mol/L.
5. The method according to claim 4, wherein in the step of mixing the mixed solution with the benzoquinone-containing absolute ethanol solution to obtain the plating solution in S1, the concentration of the benzoquinone in the benzoquinone-containing absolute ethanol solution is 0.1 to 0.5 mol/L;
the volume ratio of the mixed solution to the benzoquinone-containing absolute ethyl alcohol solution is 2-5: 1.
6. The method according to claim 5, wherein in the step S1, the plating solution is electrodeposited, and in the step of obtaining the BiOI NS material after washing the obtained electrodeposited deposit with deionized water and drying, the plating solution is electrodeposited using an electrodeposition system;
the electrodeposition system comprises: a working electrode, a counter electrode and a reference electrode;
the working electrode is made of carbon paper, the counter electrode is made of a platinum sheet, and the reference electrode is made of saturated Ag/AgCl;
7. the method according to claim 6, wherein in the step of electrodepositing the plating solution in step S1, the electrodeposition time is 1-10 min;
in the step of carrying out electrodeposition on the plating solution, the voltage applied to the working electrode of the electrodeposition system is-1 to-0.01V vs.
8. The method according to claim 7, wherein in step S2, the three-electrode system comprises: a working electrode, a counter electrode and a reference electrode;
with CO2Saturated KHCO3In solution, KHCO3The concentration of the solution is 0.1-1 mol/L.
9. The method of claim 8, wherein in step S2, the BiOI NS material is used as a working electrode, and CO is used as a working electrode2Saturated KHCO3The solution is used as an electrolyte to carry out a reduction reaction in a three-electrode system to obtain the Bi2O2CO3In the step of NS material, applying a bias voltage of-1 to-2V vs. Ag/AgCl on a working electrode of the three-electrode system for 10-60 min, taking out the reduced working electrode, and drying the working electrode in the air at the temperature of 60-100 ℃ for 30-60 min to obtain the Bi2O2CO3NS material.
10. Bi produced by the production method according to any one of claims 1 to 92O2CO3NS material, characterized in that Bi2O2CO3The NS material is of a petal-shaped nanosheet structure.
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