CN114959771B - Nickel-based electrocatalyst and hydrogen production synergistic formaldehyde wastewater degradation electrolytic cell - Google Patents
Nickel-based electrocatalyst and hydrogen production synergistic formaldehyde wastewater degradation electrolytic cell Download PDFInfo
- Publication number
- CN114959771B CN114959771B CN202210410148.7A CN202210410148A CN114959771B CN 114959771 B CN114959771 B CN 114959771B CN 202210410148 A CN202210410148 A CN 202210410148A CN 114959771 B CN114959771 B CN 114959771B
- Authority
- CN
- China
- Prior art keywords
- nickel
- electrolytic cell
- electrocatalyst
- electrode
- formaldehyde
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- 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
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- 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
- C25B1/50—Processes
-
- 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
- C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
- C25B11/056—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of textile or non-woven fabric
-
- 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
- C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
- C25B11/069—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of at least one single element and at least one compound; consisting of two or more compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
- C02F2001/46138—Electrodes comprising a substrate and a coating
- C02F2001/46142—Catalytic coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Abstract
The invention discloses a nickel-based electrocatalyst and a hydrogen-producing synergistic formaldehyde wastewater electrolytic cell, which comprises the following specific steps: s11: mixing materials: adding a certain amount of nickel nitrate and potassium thiocyanate into a container, and uniformly mixing; s12: calcining at constant temperature: placing the mixture into a muffle furnace, and calcining at a constant temperature; s13: and (3) naturally cooling: calcining at constant temperature, and naturally cooling the mixture to room temperature; s14: removing impurities: washing off superfluous potassium thiocyanate by deionized water; s15: and (3) drying: drying to obtain the nickel-based electrocatalyst; in the step S12, the specific implementation mode of constant-temperature calcination is to control the muffle furnace to calcine for 2 hours at the constant temperature of 450 ℃, and the nickel-based electrocatalyst and the hydrogen production synergistic degradation formaldehyde wastewater electrolytic cell disclosed by the invention have the effect of improving the hydrogen production efficiency while the electrolytic cell is used for oxidizing formaldehyde wastewater electrically.
Description
Technical Field
The invention relates to the technical field of wastewater degradation, in particular to a nickel-based electrocatalyst and a wastewater electrolytic cell for producing hydrogen and cooperatively degrading formaldehyde.
Background
Fossil fuels are consumed in large amounts as non-renewable resources, causing energy shortages and serious environmental pollution. Therefore, there is an urgent need to develop renewable, environmentally friendly energy sources, particularly efficient clean energy sources such as hydrogen. Hydrogen production by electrocatalytic decomposition of water is a clean and environmentally friendly process, but its slow anodic oxygen evolution still limits its industrial application.
Studies have shown that hydrogen production can be promoted by replacing the slow anodic oxygen evolution reaction with other oxidation reactions. Wherein, formaldehyde is more easily oxidized than water molecules, thereby promoting the cathodic hydrogen evolution reaction. On the other hand, the harmfulness of formaldehyde is well known, and therefore, the invention aims to directly utilize formaldehyde wastewater as electrolyte to improve hydrogen production efficiency, and simultaneously, to electrically catalyze and oxidize formaldehyde in the wastewater.
In the prior report, han Weiqing et al provide a device and a method (CN 202010339053.1) for treating formaldehyde-containing wastewater, which utilize a titanium-based ruthenium dioxide electrode to treat formaldehyde in wastewater by adopting an electrocatalytic oxidation method, but the cost is high. Li Yuexiang et al provide the use of molybdenum phosphide in alkaline formaldehyde solutions for catalytic hydrogen production (CN 201710715999.1), which uses molybdenum phosphide in alkaline formaldehyde solutions for catalytic hydrogen production, but requires concentrated lye and inert gas for reaction protection, which is not friendly to the environment.
Therefore, in order to obviously reduce the cell voltage of the electrolytic cell and improve the hydrogen production efficiency while degrading formaldehyde, the following scheme is proposed.
Disclosure of Invention
The invention discloses a nickel-based electrocatalyst and a formaldehyde wastewater electrolytic cell for synergistic degradation of hydrogen production, and aims to solve the technical problems of low hydrogen production efficiency and unsatisfactory degradation effect of formaldehyde solution in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a nickel-based electrocatalyst comprising the specific steps of:
s11: mixing materials: adding a certain amount of nickel nitrate and potassium thiocyanate into a container, and uniformly mixing;
s12: calcining at constant temperature: placing the mixture into a muffle furnace, and calcining at a constant temperature;
s13: and (3) naturally cooling: calcining at constant temperature, and naturally cooling the mixture to room temperature;
s14: removing impurities: washing off superfluous potassium thiocyanate by deionized water;
s15: and (3) drying: and drying to obtain the nickel-based electrocatalyst.
Fossil fuel is consumed in a large amount as non-renewable resources, which causes energy shortage and serious environmental pollution, so that development of renewable and environment-friendly energy, especially hydrogen, which is an efficient and clean energy source is urgently needed, hydrogen production by electrocatalytic decomposition of water is a clean and environment-friendly method in the prior art, but slow anodic oxygen evolution reaction still limits industrial application thereof, research shows that hydrogen generation can be promoted by replacing slow anodic oxygen evolution reaction with other oxidation reaction, wherein formaldehyde is more easily oxidized than water molecules, and further hydrogen evolution reaction of cathode is promoted, and on the other hand, the harmfulness of formaldehyde is well known, and therefore, the invention aims to directly utilize formaldehyde wastewater as electrolyte to improve hydrogen production efficiency, and simultaneously, the invention aims to electrocatalytically oxidize formaldehyde in wastewater by using NiS x As an electrocatalyst material, the method obviously reduces the cell voltage of the electrolytic cell while the electrolytic cell is used for electrooxidizing formaldehyde wastewater, improves the hydrogen production efficiency, is a new environment-friendly and energy-saving hydrogen production strategy, and has obvious practical application value.
In a preferred embodiment, in S12, the constant temperature calcination is performed by controlling the muffle furnace to perform constant temperature calcination at 450 ℃ for 2 hours;
an electrolytic cell for producing hydrogen and cooperatively degrading formaldehyde wastewater, which comprises the following specific steps:
s1: preparation of electrocatalyst: preparing a nickel-based electrocatalyst for later use;
s2: preparing an electrolyte: preparing electrolyte by using PBS solution;
s3: electrode preparation: manufacturing an electrode by using a nickel-based electrocatalyst to form a two-electrode system;
s4: adding an electrocatalytic substance: adding a certain amount of electrocatalytic substances to perform electrocatalytic;
s5: applying a voltage: applying a certain voltage to electrolyze the electrocatalytic substance by the electrode prepared in the electrode preparation process;
in the step S2, the concentration of PBS in the electrolyte preparation is 0.01M;
in the step S4, the electrocatalytic substance added into the electrocatalytic substance is a certain amount of HCHO, wherein the concentration of the HCHO is 2mg/L;
in the step S3, the electrode preparation comprises the following specific steps:
s31: preparing mixed slurry: mixing the prepared electrocatalyst with a certain amount of other materials to prepare the required mixed slurry;
s32: and (3) slurry drying: the slurry was coated on a medium and dried at room temperature for 24 hours to give NiS x An electrode;
in S31, the specific embodiment of the preparation of the mixed slurry is that the mass ratio of the prepared nickel-based electrocatalyst to the conductive carbon black to polyvinylidene fluoride is 8:1:1, dispersing in 1-methyl-2-pyrrolidone, and stirring to form uniform slurry;
in the step S32, the concrete implementation mode of slurry drying is to coat the prepared slurry on carbon fiber cloth with the coating area of 0.5cm x 0.5cm, and obtain the NiS after drying x An electrode.
The invention is further illustrated by the following examples;
embodiment one:
adding 1g of nickel nitrate and 10g of potassium thiocyanate into a container at room temperature, uniformly mixing, placing the mixture into a muffle furnace, calcining for 2 hours at the constant temperature of 450 ℃, naturally cooling to room temperature after calcining for 2 hours, washing off excessive potassium thiocyanate with deionized water, and drying to obtain the NiS x An electrocatalyst;
test case one:
as can be seen from FIG. 4, the characteristic peaks of the product prepared in example one correspond to NiS and NiS 2 Example one preparation of products was NiS and NiS 2 Is a complex electrocatalyst of (a);
as can be seen from FIG. 5, the first example was preparedIs of NiS of (2) x The electrocatalyst consists of a mixture of large particles with a diameter of 2-10 μm and small particles with a diameter of 1 μm;
as can be seen from fig. 6, the cell voltage of the formaldehyde/PBS cell is greatly reduced and the current density of the anode and cathode is increased compared to the conventional PBS cell;
the test procedure was as follows:
the NiS obtained in example I x The mass ratio of the electrocatalyst to the conductive carbon black to the polyvinylidene fluoride is 8:1:1, dispersing in 1-methyl-2-pyrrolidone, stirring to form uniform slurry, coating the slurry on carbon fiber cloth, and drying at room temperature for 24 hr to obtain NiS with coating area of 0.5cm×0.5cm x An electrode;
two NiS sheets prepared by the method x The electrodes are respectively used as a cathode and an anode, a certain voltage is applied to the two electrode systems, and the electrocatalytic performance test is respectively carried out in 0.01M PBS and 2mg/L HCHO, and as can be seen from FIG. 3, the addition of HCHO greatly reduces the overpotential of electrolyzed water, and the cathode and the anode reach 10mA/cm 2 When the current density of the PBS system is 3.55V, the cell voltage of the PBS/HCHO system is only 3.10V, and the cell voltage is reduced by 0.45V, because formaldehyde oxidation replaces slow four-electron water oxidation half reaction, the energy consumption of electrolysis water is further reduced, and hydrogen production is promoted.
The nickel-based electrocatalyst and the hydrogen production synergistic degradation formaldehyde wastewater electrolytic cell have the following application steps:
1. preparing an electrocatalyst, adding a certain amount of nickel nitrate and potassium thiocyanate into a container, uniformly mixing, placing the mixture into a muffle furnace, calcining at the constant temperature of 450 ℃ for 2 hours, naturally cooling to room temperature after calcining for 2 hours, washing off excessive potassium thiocyanate with deionized water, and drying to obtain the nickel-based electrocatalyst;
2. preparing electrolyte, and selecting proper electrolyte for standby;
3. electrode preparation, the obtained NiS x The mass ratio of the electrocatalyst to the conductive carbon black to the polyvinylidene fluoride is 8:1:1, dispersing in 1-methyl-2-pyrrolidone, and stirring to obtain uniform mixtureCoating the slurry on carbon fiber cloth, and drying at room temperature for 24 hr to obtain NiS with coating area of 0.5cm×0.5cm x An electrode;
the two NiS sheets prepared by the method x The electrodes are respectively used as a cathode and an anode, a certain voltage is applied to the two electrode systems, and a certain amount of PBS and HCHO are added to perform electrocatalytic performance test, wherein the addition of HCHO greatly reduces the overpotential of electrolyzed water, and the formaldehyde oxidation reaction replaces slow four-electron water oxidation half reaction, so that the energy consumption of electrolyzed water is reduced, and hydrogen production is promoted.
By using the nickel-based electrocatalyst as an electrode material and forming a two-electrode electrolytic cell and adding a certain amount of PBS and HCHO, an HCHO/PBS electrolytic system is adopted, so that compared with the traditional water electrolysis system, the cell voltage is effectively reduced, water is efficiently electrolyzed, and formaldehyde pollutants are oxidatively degraded.
From the above, a nickel-based electrocatalyst comprises the following specific steps:
s11: mixing materials: adding a certain amount of nickel nitrate and potassium thiocyanate into a container, and uniformly mixing;
s12: calcining at constant temperature: placing the mixture into a muffle furnace, and calcining at a constant temperature;
s13: and (3) naturally cooling: calcining at constant temperature, and naturally cooling the mixture to room temperature;
s14: removing impurities: washing off superfluous potassium thiocyanate by deionized water;
s15: and (3) drying: and drying to obtain the nickel-based electrocatalyst. The nickel-based electrocatalyst and the electrolytic cell for producing hydrogen and synergistically degrading formaldehyde wastewater have the technical effects of improving the hydrogen production efficiency while the electrolytic cell is used for electrooxidizing formaldehyde wastewater.
Drawings
FIG. 1 is a flow chart of a nickel-based electrocatalyst and a hydrogen-producing synergistic formaldehyde wastewater electrolytic cell.
FIG. 2 is a flow chart of the preparation of the electrocatalyst of the electrolytic cell for the synergistic degradation of formaldehyde wastewater by the nickel-based electrocatalyst and hydrogen production.
FIG. 3 is a flow chart of the electrode preparation of the nickel-based electrocatalyst and the electrolytic cell for producing hydrogen to cooperatively degrade formaldehyde wastewater.
FIG. 4 shows a nickel-based electrocatalyst NiS prepared in accordance with an embodiment of the invention and a pool for producing hydrogen and synergistically degrading formaldehyde wastewater x X-ray diffraction (XRD) patterns of (a).
FIG. 5 shows a nickel-based electrocatalyst and a method for preparing NiS by an embodiment of a pool for producing hydrogen and synergistically degrading formaldehyde wastewater x Scanning Electron Microscope (SEM) image of the electrocatalyst.
FIG. 6 shows a nickel-based electrocatalyst and a method for preparing NiS by an embodiment of a pool for producing hydrogen and synergistically degrading formaldehyde wastewater x Electrocatalytic performance test patterns of electrocatalysts in 0.01M PBS and 0.01M PBS+2mg/L HCHO, respectively.
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.
The invention discloses a nickel-based electrocatalyst and a hydrogen-producing synergistic formaldehyde wastewater electrolytic cell which are mainly applied to a scene of wastewater electrolysis.
Referring to fig. 2, a nickel-based electrocatalyst comprises the following specific steps:
s11: mixing materials: adding a certain amount of nickel nitrate and potassium thiocyanate into a container, and uniformly mixing;
s12: calcining at constant temperature: placing the mixture into a muffle furnace, and calcining at a constant temperature;
s13: and (3) naturally cooling: calcining at constant temperature, and naturally cooling the mixture to room temperature;
s14: removing impurities: washing off superfluous potassium thiocyanate by deionized water;
s15: and (3) drying: and drying to obtain the nickel-based electrocatalyst.
Referring to fig. 2, in a preferred embodiment, in S12, a specific embodiment of the constant temperature calcination is to control the muffle furnace to perform constant temperature calcination at 450 ℃ for 2 hours.
Referring to fig. 1, a hydrogen-producing synergistic formaldehyde wastewater electrolytic cell comprises the following specific steps:
s1: preparation of electrocatalyst: preparing a nickel-based electrocatalyst for later use;
s2: preparing an electrolyte: preparing electrolyte by taking PBS as a base solution;
s3: electrode preparation: manufacturing an electrode by using a nickel-based electrocatalyst to form a two-electrode system;
s4: adding an electrocatalytic substance: adding a certain amount of electrocatalytic substances to perform electrocatalytic;
s5: applying a voltage: and applying a certain voltage to electrolyze the electrocatalytic substance by the electrode prepared in the electrode preparation.
Referring to fig. 1, in a preferred embodiment, in S2, the concentration of PBS in the electrolyte preparation is 0.01M.
Referring to FIG. 1, in a preferred embodiment, in S4, the electrocatalytic species added to the electrocatalytic species is an amount of HCHO, wherein the concentration of HCHO is 2mg/L.
Referring to fig. 3, in a preferred embodiment, in S3, the electrode preparation comprises the following specific steps:
s31: preparing mixed slurry: mixing the prepared electrocatalyst with a certain amount of other materials to prepare the required mixed slurry;
s32: and (3) slurry drying: the slurry was coated on a medium and dried at room temperature for 24 hours to give NiS x An electrode.
Referring to fig. 3, in a preferred embodiment, in S31, a specific embodiment of the mixed slurry is prepared by mixing the prepared nickel-based electrocatalyst and conductive carbon black with polyvinylidene fluoride in a mass ratio of 8:1:1, dispersing in 1-methyl-2-pyrrolidone, and stirring to form uniform slurry.
Referring to fig. 3, in a preferred embodiment, in S32, the slurry is dried by coating the prepared slurry on a carbon fiber cloth with a coating area of 0.5cm by 0.5cm, and drying to obtainNiS x An electrode.
The invention is further illustrated by the following examples.
Embodiment one:
adding 1g of nickel nitrate and 10g of potassium thiocyanate into a container at room temperature, uniformly mixing, placing the mixture into a muffle furnace, calcining for 2 hours at the constant temperature of 450 ℃, naturally cooling to room temperature after calcining for 2 hours, washing off excessive potassium thiocyanate with deionized water, and drying to obtain the NiS x An electrocatalyst;
test case one:
as can be seen from FIG. 4, the characteristic peaks of the product prepared in example one correspond to NiS and NiS 2 Example one preparation of products was NiS and NiS 2 Is a complex electrocatalyst of (a); 456
As can be seen from FIG. 5, the NiS prepared in example one x The electrocatalyst consists of a mixture of large particles with a diameter of 2-10 μm and small particles with a diameter of 1 μm;
as can be seen from FIG. 6, niS x Compared with the traditional PBS electrolytic cell, the electrocatalyst in the formaldehyde/PBS two-electrode electrolytic cell greatly reduces the cell voltage and improves the current density of the anode and the cathode;
the test procedure was as follows:
the NiS obtained in example I x The mass ratio of the electrocatalyst to the conductive carbon black to the polyvinylidene fluoride is 8:1:1, dispersing in 1-methyl-2-pyrrolidone, stirring to form uniform slurry, coating the slurry on carbon fiber cloth, and drying at room temperature for 24 hr to obtain NiS with coating area of 0.5cm×0.5cm x An electrode;
two NiS sheets prepared by the method x The electrodes are respectively used as a cathode and an anode, a certain voltage is applied to the two electrode systems, and the electrocatalytic performance test is respectively carried out in 0.01M PBS and 2mg/L HCHO, and as can be seen from FIG. 3, the addition of HCHO greatly reduces the overpotential of electrolyzed water, and the cathode and the anode reach 10mA/cm 2 The cell voltage of the PBS system was 3.55V, whereas the cell voltage of the PBS/HCHO system was only 3.10V, which was reduced by 0.45V due to the formaldehyde oxidation reactionInstead of slow four-electron water oxidation half reaction, the energy consumption of the electrolyzed water is further reduced, and hydrogen production is promoted, so that the design is energy-saving, and pollutants are degraded while low-pressure high-efficiency electrolysis of the water is realized.
Working principle: the nickel-based electrocatalyst and the hydrogen production synergistic degradation formaldehyde wastewater electrolytic cell have the following application steps:
4. preparing an electrocatalyst, adding a certain amount of nickel nitrate and potassium thiocyanate into a container, uniformly mixing, placing the mixture into a muffle furnace, calcining at the constant temperature of 450 ℃ for 2 hours, naturally cooling to room temperature after calcining for 2 hours, washing off excessive potassium thiocyanate with deionized water, and drying to obtain the nickel-based electrocatalyst;
5. preparing electrolyte, and selecting a proper electrolyte for standby;
6. electrode preparation, the obtained NiS x The mass ratio of the electrocatalyst to the conductive carbon black to the polyvinylidene fluoride is 8:1:1, dispersing in 1-methyl-2-pyrrolidone, stirring to form uniform slurry, coating the slurry on carbon fiber cloth, and drying at room temperature for 24 hr to obtain NiS with coating area of 0.5cm×0.5cm x An electrode;
7. the two NiS sheets prepared by the method x The electrodes are respectively used as a cathode and an anode, a certain voltage is applied to the two electrode systems, and a certain amount of PBS and HCHO are added to perform electrocatalytic performance test, wherein the addition of HCHO greatly reduces the overpotential of electrolytic water, and the formaldehyde oxidation reaction replaces slow four-electron water oxidation half reaction, so that the energy consumption of the electrolytic water is reduced, and the hydrogen production is promoted, therefore, the design is energy-saving, the hydrogen production efficiency is improved and pollutants are degraded while the water is electrolyzed at low pressure and high efficiency.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The electrolytic cell for producing hydrogen and cooperatively degrading formaldehyde wastewater is characterized by comprising the following specific steps of:
s1: preparation of electrocatalyst: preparing a nickel-based electrocatalyst for later use;
s2: preparing an electrolyte: preparing electrolyte by taking phosphate buffer salt solution, namely PBS as base solution;
s3: electrode preparation: manufacturing an electrode by using a nickel-based electrocatalyst to form a two-electrode system;
s4: adding an electrocatalytic substance: adding a certain amount of electrocatalytic substances to perform electrocatalytic, wherein the electrocatalytic substances added into the electrocatalytic substances are a certain amount of formaldehyde, namely HCHO;
s5: applying a voltage: applying a certain voltage to electrolyze the electrocatalytic substance by the electrode prepared in the electrode preparation process;
in step S1, the preparation method of the nickel-based electrocatalyst includes the following specific steps:
s11: mixing materials: adding a certain amount of nickel nitrate and potassium thiocyanate into a container, and uniformly mixing;
s12: calcining at constant temperature: placing the mixture into a muffle furnace, and calcining at a constant temperature;
s13: and (3) naturally cooling: calcining at constant temperature, and naturally cooling the mixture to room temperature;
s14: removing impurities: washing off superfluous potassium thiocyanate by deionized water;
s15: and (3) drying: drying to obtain the nickel-based electrocatalyst;
in the step S12, the constant-temperature calcination is carried out by controlling a muffle furnace to calcine at a constant temperature of 450 ℃ for 2 hours.
2. The electrolytic cell for the synergistic degradation of formaldehyde wastewater by hydrogen production according to claim 1, wherein in the step S2, the concentration of PBS in the electrolyte preparation is 0.01. 0.01M.
3. The hydrogen-producing synergistic formaldehyde wastewater electrolytic cell of claim 2, wherein in S4, the concentration of HCHO is 2mg/L.
4. The electrolytic cell for the synergistic degradation of formaldehyde wastewater by hydrogen production according to claim 1, wherein in the step S3, the electrode preparation comprises the following specific steps:
s31: preparing mixed slurry: mixing the prepared electrocatalyst with a certain amount of other materials to prepare the required mixed slurry;
s32: and (3) slurry drying: the slurry was coated on a medium and dried at room temperature for 24 hours to give NiS x An electrode.
5. The electrolytic cell for the synergistic degradation of formaldehyde wastewater by hydrogen production according to claim 4, wherein in the step S31, the specific implementation mode of the preparation of the mixed slurry is that the prepared nickel-based electrocatalyst and conductive carbon black are mixed with polyvinylidene fluoride according to the mass ratio of 8:1:1, dispersing in 1-methyl-2-pyrrolidone, and stirring to form uniform slurry.
6. The electrolytic cell for the synergistic degradation of formaldehyde wastewater by hydrogen production according to claim 5, wherein in the step S32, the concrete implementation mode of slurry drying is to coat the prepared slurry on carbon fiber cloth with the coating area of 0.5cm x 0.5cm, and obtain NiS after drying x An electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210410148.7A CN114959771B (en) | 2022-04-19 | 2022-04-19 | Nickel-based electrocatalyst and hydrogen production synergistic formaldehyde wastewater degradation electrolytic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210410148.7A CN114959771B (en) | 2022-04-19 | 2022-04-19 | Nickel-based electrocatalyst and hydrogen production synergistic formaldehyde wastewater degradation electrolytic cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114959771A CN114959771A (en) | 2022-08-30 |
| CN114959771B true CN114959771B (en) | 2023-10-20 |
Family
ID=82976934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210410148.7A Active CN114959771B (en) | 2022-04-19 | 2022-04-19 | Nickel-based electrocatalyst and hydrogen production synergistic formaldehyde wastewater degradation electrolytic cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114959771B (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012140419A (en) * | 2010-12-14 | 2012-07-26 | Miyoshi Oil & Fat Co Ltd | Metal particulate carrier, method for production thereof, and catalyst |
| CN103084190A (en) * | 2011-11-03 | 2013-05-08 | 中国科学院理化技术研究所 | Compound semiconductor photocatalyst, preparation method of the compound semiconductor photocatalyst, photocatalytic system comprising the compound semiconductor photocatalyst, and hydrogen preparation method |
| CN104746096A (en) * | 2015-02-27 | 2015-07-01 | 河南科技大学 | Preparation method of nickel-base catalytic electrode for electrocatalytic oxidation of urea |
| CN109277104A (en) * | 2018-10-16 | 2019-01-29 | 陕西科技大学 | A kind of NiS of sulfur-rich vanadium modification2Elctro-catalyst and preparation method thereof |
| CN109569651A (en) * | 2018-11-20 | 2019-04-05 | 郑州大学第附属医院 | A kind of bifunctional catalyst RuCo@HCSs and its preparation method and application |
| CN110284146A (en) * | 2019-06-21 | 2019-09-27 | 青岛科技大学 | Load selenium in situ adulterates molybdenum disulfide/transition metal boride nano material preparation and application |
| CN111672514A (en) * | 2020-06-17 | 2020-09-18 | 深圳大学 | Bifunctional electrocatalytic material and preparation method and application thereof |
| CN111672520A (en) * | 2020-06-04 | 2020-09-18 | 西安交通大学 | Amorphous cobalt borate-nickel selenide @ foam nickel compound, preparation method and application |
| CN112510218A (en) * | 2020-12-22 | 2021-03-16 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Composite material for cathode catalyst layer of metal-air battery and preparation method and application thereof |
| CN112928271A (en) * | 2021-01-25 | 2021-06-08 | 北京化工大学 | In-situ delamination method of hydrotalcite nanosheet array for electrocatalytic small molecule oxidation coupling hydrogen production |
| CN113145109A (en) * | 2021-05-07 | 2021-07-23 | 南京信息工程大学 | Application of room temperature catalyst in dye wastewater degradation |
| CN113774414A (en) * | 2020-06-08 | 2021-12-10 | 清华大学 | Method and system for preparing p-aminobenzoic acid |
| CN114045525A (en) * | 2021-12-03 | 2022-02-15 | 张黎丽 | Nickel-based self-supporting water electrolysis catalyst and preparation method thereof |
| CN114318397A (en) * | 2021-12-07 | 2022-04-12 | 南京信息工程大学 | Molybdenum-based electrocatalyst, preparation method thereof, bifunctional electrolytic cell and application thereof |
| CN114941155A (en) * | 2022-05-07 | 2022-08-26 | 南京信息工程大学 | Preparation process of difunctional electrolytic cell |
| CN115448817A (en) * | 2022-09-19 | 2022-12-09 | 大连理工大学 | Method for preparing ethylene glycol by oxidizing ethylene in one-step oxygen method in coupling electrocatalysis and thermocatalysis processes |
| CN116435566A (en) * | 2023-04-01 | 2023-07-14 | 西北工业大学 | Multifunctional aldehyde-nitrate chemical battery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7447443B2 (en) * | 2005-05-18 | 2008-11-04 | Huawei Technologies Co., Ltd. | Method and system for keeping time alignment between optical data modulation and a periodically modulated light source |
| WO2006123343A2 (en) * | 2005-05-18 | 2006-11-23 | Ramot At Tel Aviv University Ltd. | Biologically active metal-coated proteins |
| JP5890842B2 (en) * | 2010-11-04 | 2016-03-22 | 中国科学院理化技術研究所 | Semiconductor photocatalyst for photocatalysis and reforming of biomass derivatives to produce hydrogen and its production and application |
| JP2021515102A (en) * | 2018-02-28 | 2021-06-17 | マニュファクチュアリング システムズ リミテッド | Catalytic equipment and methods |
| US11759534B2 (en) * | 2019-03-07 | 2023-09-19 | Imam Abdulrahman Bin Faisal University | Nanotherapeutic and a method of oxidative dehydrogenation built on hierarchical silica composites |
-
2022
- 2022-04-19 CN CN202210410148.7A patent/CN114959771B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012140419A (en) * | 2010-12-14 | 2012-07-26 | Miyoshi Oil & Fat Co Ltd | Metal particulate carrier, method for production thereof, and catalyst |
| CN103084190A (en) * | 2011-11-03 | 2013-05-08 | 中国科学院理化技术研究所 | Compound semiconductor photocatalyst, preparation method of the compound semiconductor photocatalyst, photocatalytic system comprising the compound semiconductor photocatalyst, and hydrogen preparation method |
| CN104746096A (en) * | 2015-02-27 | 2015-07-01 | 河南科技大学 | Preparation method of nickel-base catalytic electrode for electrocatalytic oxidation of urea |
| CN109277104A (en) * | 2018-10-16 | 2019-01-29 | 陕西科技大学 | A kind of NiS of sulfur-rich vanadium modification2Elctro-catalyst and preparation method thereof |
| CN109569651A (en) * | 2018-11-20 | 2019-04-05 | 郑州大学第附属医院 | A kind of bifunctional catalyst RuCo@HCSs and its preparation method and application |
| CN110284146A (en) * | 2019-06-21 | 2019-09-27 | 青岛科技大学 | Load selenium in situ adulterates molybdenum disulfide/transition metal boride nano material preparation and application |
| CN111672520A (en) * | 2020-06-04 | 2020-09-18 | 西安交通大学 | Amorphous cobalt borate-nickel selenide @ foam nickel compound, preparation method and application |
| CN113774414A (en) * | 2020-06-08 | 2021-12-10 | 清华大学 | Method and system for preparing p-aminobenzoic acid |
| CN111672514A (en) * | 2020-06-17 | 2020-09-18 | 深圳大学 | Bifunctional electrocatalytic material and preparation method and application thereof |
| CN112510218A (en) * | 2020-12-22 | 2021-03-16 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Composite material for cathode catalyst layer of metal-air battery and preparation method and application thereof |
| CN112928271A (en) * | 2021-01-25 | 2021-06-08 | 北京化工大学 | In-situ delamination method of hydrotalcite nanosheet array for electrocatalytic small molecule oxidation coupling hydrogen production |
| CN113145109A (en) * | 2021-05-07 | 2021-07-23 | 南京信息工程大学 | Application of room temperature catalyst in dye wastewater degradation |
| CN114045525A (en) * | 2021-12-03 | 2022-02-15 | 张黎丽 | Nickel-based self-supporting water electrolysis catalyst and preparation method thereof |
| CN114318397A (en) * | 2021-12-07 | 2022-04-12 | 南京信息工程大学 | Molybdenum-based electrocatalyst, preparation method thereof, bifunctional electrolytic cell and application thereof |
| CN114941155A (en) * | 2022-05-07 | 2022-08-26 | 南京信息工程大学 | Preparation process of difunctional electrolytic cell |
| CN115448817A (en) * | 2022-09-19 | 2022-12-09 | 大连理工大学 | Method for preparing ethylene glycol by oxidizing ethylene in one-step oxygen method in coupling electrocatalysis and thermocatalysis processes |
| CN116435566A (en) * | 2023-04-01 | 2023-07-14 | 西北工业大学 | Multifunctional aldehyde-nitrate chemical battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114959771A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chen et al. | In-situ electrochemical flue gas desulfurization via carbon black-based gas diffusion electrodes: Performance, kinetics and mechanism | |
| Zhang et al. | An ammonia electrolytic cell with NiCu/C as anode catalyst for hydrogen production | |
| CN108191075B (en) | MoS in microbial electrolysis cell2Preparation method and application of/transition metal/graphene composite hydrogen evolution electrode | |
| CN113136597B (en) | Copper-tin composite material and preparation method and application thereof | |
| Zhao et al. | Nanomaterials as electrode materials of microbial electrolysis cells for hydrogen generation | |
| CN113957456A (en) | Nickel-based alkaline electrolytic water catalyst with co-doped combination heterostructure and preparation method thereof | |
| CN114941155A (en) | Preparation process of difunctional electrolytic cell | |
| CN113637986B (en) | Biphase nickel selenide double-function electrolytic water catalyst, preparation method and application thereof | |
| CN114351165A (en) | Preparation method and application of three-dimensional core-shell structure dual-function seawater electrolysis catalyst | |
| CN113443610B (en) | Ruthenium selenide nanosphere electrocatalyst and preparation method and application thereof | |
| CN114318397A (en) | Molybdenum-based electrocatalyst, preparation method thereof, bifunctional electrolytic cell and application thereof | |
| CN113023835B (en) | Preparation method of electro-Fenton cathode material based on sludge-based biomass carbon, product and application thereof | |
| CN111939914B (en) | Method for preparing high-activity ternary metal oxygen evolution catalyst by using waste copper foil | |
| CN114959771B (en) | Nickel-based electrocatalyst and hydrogen production synergistic formaldehyde wastewater degradation electrolytic cell | |
| CN114959772B (en) | Long-life noble metal oxide oxygen evolution reaction electrocatalyst, preparation method and application | |
| CN116474772A (en) | Transition metal doped modified flaky iridium oxide catalyst and preparation method and application thereof | |
| CN114657592B (en) | Nickel-based catalyst for electrocatalytic carbon dioxide reduction and preparation method thereof | |
| CN115821319A (en) | Octahedron Cu 2 O/CuO heterojunction catalyst, and preparation method and application thereof | |
| CN110065932B (en) | Lithium insertion type selenium compound, and preparation method and application thereof | |
| CN113233549A (en) | Nano lead dioxide electrode and preparation method and application thereof | |
| CN108911048B (en) | Preparation method of multi-scale salient point electrode | |
| CN111804302A (en) | Cobalt-based electrocatalyst and low-voltage hydrogen production electrolytic cell thereof | |
| Wang et al. | Electrocatalytic reduction of nitrate via CO3O4/Ti cathode prepared by electrodeposition paired with IrO2-RuO2 anode | |
| CN115161697B (en) | Preparation and application of hollow sphere multi-component composite material | |
| CN115094475B (en) | Electrode material with high-performance oxygen evolution catalytic activity and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |