CN114134530A - Preparation method of Cu-P-100 catalyst and application thereof in carbon dioxide electrocatalytic reduction - Google Patents
Preparation method of Cu-P-100 catalyst and application thereof in carbon dioxide electrocatalytic reduction Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000003054 catalyst Substances 0.000 title claims abstract description 31
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 25
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 41
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000005406 washing Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000008367 deionised water Substances 0.000 claims abstract description 11
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 11
- 238000004070 electrodeposition Methods 0.000 claims abstract description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001263 FEMA 3042 Substances 0.000 claims abstract description 9
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims abstract description 9
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 claims abstract description 9
- 229940033123 tannic acid Drugs 0.000 claims abstract description 9
- 235000015523 tannic acid Nutrition 0.000 claims abstract description 9
- 229920002258 tannic acid Polymers 0.000 claims abstract description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000000151 deposition Methods 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract description 18
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 238000006722 reduction reaction Methods 0.000 description 9
- 229910052786 argon Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 229910021642 ultra pure water Inorganic materials 0.000 description 3
- 239000012498 ultrapure water Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 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 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 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
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 229920000557 Nafion® Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004502 linear sweep voltammetry Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000001075 voltammogram Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/075—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of a single catalytic element or catalytic compound
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/23—Carbon monoxide or syngas
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/052—Electrodes comprising one or more electrocatalytic coatings on a substrate
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B3/00—Electrolytic production of organic compounds
- C25B3/01—Products
- C25B3/07—Oxygen containing compounds
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B3/00—Electrolytic production of organic compounds
- C25B3/20—Processes
- C25B3/25—Reduction
- C25B3/26—Reduction of carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/54—Electroplating of non-metallic surfaces
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- Engineering & Computer Science (AREA)
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- Inorganic Chemistry (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract
The invention relates to a preparation method of a Cu-P-100 catalyst and application thereof in carbon dioxide electrocatalytic reduction. The preparation method comprises the following steps: firstly, immersing carbon paper in hydrochloric acid, taking out the carbon paper after ultrasonic washing, ultrasonic washing with deionized water, acetone and deionized water in sequence, drying, and cutting the dried carbon paper into a rectangle of 1cm multiplied by 2cm to obtain the processed carbon paper; secondly, completely dissolving tannic acid and nitric acid in ionized water to obtain an electrodeposition solution; and finally, applying a constant current of 5mA to the treated carbon paper by using an electrochemical workstation, depositing for 180s, taking out the deposited carbon paper, washing with ethanol, and drying with nitrogen to obtain the Cu-P-100 catalyst. The Cu-P-100 catalyst prepared by the invention can reduce carbon dioxide into acetic acid, and the Faraday efficiency of the acetic acid is higher.
Description
Technical Field
The invention belongs to the technical field of catalytic materials, and particularly relates to a preparation method of a Cu-P-100 catalyst and application thereof in carbon dioxide electrocatalytic reduction.
Background
Electrocatalytic reduction reaction (CO) of carbon dioxide2RR) not only can mitigate greenhouse effect, but also can produce compounds with higher value as fuels to alleviate the fossil energy crisis. However, carbon dioxide molecules are very stable and require a high amount of energy to reduce the carbon dioxide molecules to other carbon products. The faradaic efficiency of various catalysts that transfer two electrons, such as carbon monoxide, formic acid, etc., by reducing carbon dioxide molecules to carbon monoxide has been up to 95% or more. But further converting carbon dioxide to higher commercial value products with more than two carbon atoms, including ethylene, ethanol, acetic acid, propanol, etc., the activity and selectivity of the catalyst remains a significant challenge. Carbon monoxide is the most important intermediate in the reduction of carbon dioxide, and Cu is considered to be electrochemically catalytic CO due to its combination with CO2Generation of C2+The only metal of the product. Therefore, various methods and strategies have been developed to design the preparation of copper-based catalysts. The electrodeposition is used as a clean and simple operation technology, and the copper-based catalyst with good performance is prepared with the aid of an additive.
Disclosure of Invention
In order to solve the problems, the technical scheme adopted by the invention is as follows: the preparation method of the Cu-P-100 catalyst comprises the following steps:
1) placing the carbon paper in a beaker, adding hydrochloric acid to ensure that the hydrochloric acid is over the carbon paper, taking out the carbon paper after ultrasonic washing for 10min, ultrasonically washing for 10min twice by deionized water, ultrasonically washing for 10min by acetone, ultrasonically washing for 10min by deionized water for 10min twice, taking out the carbon paper, placing the carbon paper in a vacuum drying box for drying, and cutting the dried carbon paper into a rectangle of 1cm multiplied by 2cm to obtain the treated carbon paper;
2) placing tannic acid and copper nitrate in a beaker, adding 20mL of deionized water, and ultrasonically stirring to completely dissolve the tannic acid and the copper nitrate to obtain an electrodeposition solution;
3) adding magnetons into a beaker filled with the electrodeposition liquid, keeping stirring at a constant rotating speed, preventing the electrodeposition liquid from layering, clamping the treated carbon paper obtained in the step 1) on an electrode clamp as a working electrode by taking Ag/AgCl as a reference electrode and a graphite rod as a counter electrode, applying constant current to the carbon paper clamped on the electrode clamp by using an electrochemical workstation, depositing for 180s, taking out the deposited carbon paper, washing with ethanol, and drying with nitrogen to obtain the Cu-P-100 catalyst.
Further, in the above preparation method, step 1), the concentration of the hydrochloric acid is 0.1 mol/L.
Further, in the above preparation method, step 2), the mass of the tannic acid is 0.17 g.
Further, in the above preparation method, step 2), the mass of the copper nitrate is 0.48 g.
Further, in the above preparation method, step 3), the constant current applied to the carbon paper clamped on the electrode clamp by the electrochemical workstation is 5 mA.
The Cu-P-100 catalyst prepared by the preparation method provided by the invention is applied to carbon dioxide electrocatalytic reduction.
The invention has the beneficial effects that:
1. the Cu-P-100 catalyst prepared by the invention can reduce carbon dioxide into acetic acid, and the Faraday efficiency of the acetic acid is high and can reach 33.4%.
2. The preparation method is simple to operate, clean and environment-friendly.
3. The Cu-P-100 catalyst prepared by the invention has the highest total Faraday efficiency which can reach nearly 65% under the potential of-0.9V vs.
Drawings
FIG. 1 is a scanning electron micrograph of a Cu-P-100 catalyst.
FIG. 2 is an X-ray diffraction (XRD) spectrum of a Cu-P-100 catalyst.
FIG. 3 is a linear sweep voltammogram of a Cu-P-100 catalyst under carbon dioxide and argon conditions.
Figure 4 is a graph of faradaic efficiency of electrocatalytic reduction of carbon dioxide product with Cu-P-100 catalyst.
Detailed Description
EXAMPLE 1 preparation of Cu-P-100 catalyst
1) Placing the carbon paper in a beaker, adding 0.1mol/L hydrochloric acid to ensure that the hydrochloric acid submerges the carbon paper, taking out the carbon paper after ultrasonic washing for 10min, ultrasonically washing for 10min twice by deionized water, ultrasonically washing for 10min by acetone, ultrasonically washing for 10min by deionized water for 10min twice, taking out the carbon paper, placing the carbon paper in a vacuum drying box for drying, and cutting the dried carbon paper into a rectangle of 1cm multiplied by 2cm to obtain the treated carbon paper;
2) placing 0.17g of tannic acid and 0.48g of copper nitrate in a beaker, adding 20mL of deionized water, and carrying out ultrasonic stirring to completely dissolve the tannic acid and the copper nitrate to obtain an electrodeposition solution;
3) adding magnetons into a beaker filled with the electrodeposition liquid, keeping stirring at a constant rotating speed, preventing the electrodeposition liquid from layering, taking Ag/AgCl as a reference electrode and a graphite rod as a counter electrode, clamping the treated carbon paper obtained in the step 1) on an electrode clamp as a working electrode, applying a constant current of 5mA to the carbon paper clamped on the electrode clamp by using an electrochemical workstation, depositing for 180s, taking out the deposited carbon paper, washing with ethanol, and drying with nitrogen to obtain the Cu-P-100 catalyst.
4) Electrochemical performance test
An electrochemical workstation CHI760E is utilized to perform electrochemical performance test by adopting a three-electrode system, wherein a platinum wire is used as a counter electrode, Ag/AgCl (saturated KCl) is used as a reference electrode, carbon paper loaded with a catalyst is clamped on an electrode clamp to be used as a working electrode, a typical H-shaped electrolytic cell is selected as the electrolytic cell, a proton exchange membrane (Nafion 177) washed by ultrapure water is placed between two compartments of the electrolytic cell to ensure that only hydrogen ions pass through, the liquid level of electrolyte in each compartment needs to be kept horizontal, and 0.1mol/L KHCO is prepared3The solution of (2) is used as an electrolyte, and the solvent is ultrapure water to eliminate the interference of chloride ions, nitrate ions, sulfate ions and other ions as much as possible. All tests were conducted at room temperature with a rotameter controlled to admit 30min of high purity argon at a flow rate of 25sccm, followed by the introduction of high purity carbon dioxide at the same flow rate and time. According to the Nernst equation,all potentials measured on all references and Ag/AgCl electrodes were converted to potentials relative to the Reversible Hydrogen Electrode (RHE): ERHE ═ EAg/AgCl + 0.059X pH + 0.197V.
5) Electrocatalytic reduction carbon dioxide performance test
Carrying out electrocatalytic reduction on carbon dioxide by using the prepared Cu-P-100 catalyst, soaking the H-shaped electrolytic cell for testing in dilute hydrochloric acid for 10min, aiming at removing other substances in the electrolytic cell, and adding 50mL of 0.1mol/L KHCO prepared by ultrapure water into two compartments of the electrolytic cell after assembling the H-shaped electrolytic cell3The solution is sealed, high-purity argon with the flow rate of 25sccm is introduced into the cathode chamber for 30min, then high-purity carbon dioxide with the same flow rate and time as the previous high-purity argon is introduced, electrolytic reaction is carried out under different potentials, the flow rate of the carbon dioxide is controlled to be constant at 25sccm during the electrolytic reaction, gas generated by the reaction is collected every 20min, each potential is collected for three times for 1h, the total electric charge applied during the reaction is recorded, and the collected gas is introduced into a gas chromatograph-mass spectrometer to measure the amount and the type of the gaseous product.
FIG. 1 is a scanning electron micrograph of a Cu-P-100 catalyst, and from FIG. 1, it can be seen that the entire carbon paper substrate is covered with agglomerated particles, and the surface of each agglomerated particle is shown to be composed of many cubic nanoparticles.
FIG. 2 is an X-ray diffraction (XRD) spectrum of a Cu-P-100 catalyst.
FIG. 3 is a Linear Sweep Voltammetry (LSV) curve of a Cu-P-100 catalyst under carbon dioxide and argon conditions, and the comparison shows that the current density is higher under the carbon dioxide condition, which indicates that the catalyst has a certain catalytic reduction effect on carbon dioxide.
Figure 4 is a graph of faradaic efficiency of the electrocatalytic reduction of carbon dioxide product with Cu-P-100 catalyst, and from figure 4 it can be seen that the faradaic efficiency of acetic acid is highest, reaching 33.4% under the condition of-0.9V vs. rhe.
Claims (6)
- A preparation method of a Cu-P-100 catalyst is characterized by comprising the following steps:1) placing the carbon paper in a beaker, adding hydrochloric acid to ensure that the hydrochloric acid is over the carbon paper, taking out the carbon paper after ultrasonic washing for 10min, ultrasonically washing for 10min twice by deionized water, ultrasonically washing for 10min by acetone, ultrasonically washing for 10min by deionized water for 10min twice, taking out the carbon paper, placing the carbon paper in a vacuum drying box for drying, and cutting the dried carbon paper into a rectangle of 1cm multiplied by 2cm to obtain the treated carbon paper;2) placing tannic acid and copper nitrate in a beaker, adding 20mL of deionized water, and ultrasonically stirring to completely dissolve the tannic acid and the copper nitrate to obtain an electrodeposition solution;3) adding magnetons into a beaker filled with the electrodeposition liquid, keeping stirring at a constant rotating speed, preventing the electrodeposition liquid from layering, clamping the treated carbon paper obtained in the step 1) on an electrode clamp as a working electrode by taking Ag/AgCl as a reference electrode and a graphite rod as a counter electrode, applying constant current to the carbon paper clamped on the electrode clamp by using an electrochemical workstation, depositing for 180s, taking out the deposited carbon paper, washing with ethanol, and drying with nitrogen to obtain the Cu-P-100 catalyst.
- 2. The method according to claim 1, wherein the concentration of the hydrochloric acid in the step 1) is 0.1 mol/L.
- 3. The method according to claim 1, wherein the mass of the tannic acid in the step 2) is 0.17 g.
- 4. The production method according to claim 1, wherein the mass of the copper nitrate in the step 2) is 0.48 g.
- 5. The manufacturing method according to claim 1, wherein in the step 3), the constant current applied to the carbon paper clamped on the electrode clamp by the electrochemical workstation is 5 mA.
- 6. The use of the Cu-P-100 catalyst prepared by the preparation method according to claim 1 in electrocatalytic reduction of carbon dioxide.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040206631A1 (en) * | 2001-10-02 | 2004-10-21 | Shipley Company, L.L.C. | Plating bath and method for depositing a metal layer on a substrate |
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