CN113174600A - Porous nickel screen electrolytic water catalytic material and preparation method thereof - Google Patents
Porous nickel screen electrolytic water catalytic material and preparation method thereof Download PDFInfo
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 400
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 199
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 69
- 239000000463 material Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 32
- 239000001257 hydrogen Substances 0.000 claims abstract description 32
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 30
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002105 nanoparticle Substances 0.000 claims abstract description 26
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 21
- 238000004070 electrodeposition Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 11
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 27
- 239000012498 ultrapure water Substances 0.000 claims description 27
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 26
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 22
- 235000019270 ammonium chloride Nutrition 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 11
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 7
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 claims description 5
- 229940078494 nickel acetate Drugs 0.000 claims description 5
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 5
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 4
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- 238000002791 soaking Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000010411 electrocatalyst Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000003090 exacerbative effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000629 steam reforming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 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
- 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
- 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
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Chemical Kinetics & Catalysis (AREA)
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a porous nickel screen electrolyzed water catalytic material and a preparation method thereof. The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps: (1) in a two-electrode system, electrolyte is arranged in an electrolytic cell, a pretreated commercial nickel screen is used as a working electrode, a platinum sheet is used as a counter electrode, and after current is applied, a nickel nanoparticle layer is loaded on the commercial nickel screen by using an electrodeposition method to obtain the commercial nickel screen loaded with the nickel nanoparticle layer; (2) and (2) taking the commercial nickel screen loaded with the nickel nanoparticle layer in the step (1) out of the electrolytic bath, washing and naturally drying to obtain the porous nickel screen electrolytic water catalytic material. Compared with the commercial nickel screen used at present, the porous nickel screen electrolyzed water catalytic material prepared by the invention has higher catalytic activity, can effectively improve the water electrolysis efficiency and reduce the energy consumption, thereby greatly reducing the water electrolysis hydrogen production cost.
Description
The technical field is as follows:
the invention relates to the technical field of water electrolysis catalysts, in particular to a porous nickel screen water electrolysis catalytic material and a preparation method thereof.
Background art:
the hydrogen is an ideal energy storage carrier and has the advantages of high energy density, zero carbon emission, cleanness, no pollution and the like. As a highly efficient clean energy with promising development prospect, the development of hydrogen energy is currently mainly limited by its energy-consuming and environmentally unfriendly production mode. The currently widely used hydrogen 95% is derived from steam reforming reaction of fossil fuel, which is low cost and can be produced commercially on a large scale, but consumes huge energy and generates a large amount of carbon dioxide, thereby exacerbating greenhouse effect. In addition, the efficiency and purity of the method for preparing hydrogen are difficult to meet the current higher hydrogen production requirement. In contrast, the electrolysis of hydrogen to produce hydrogen is clean and environment-friendly, can obtain high-purity hydrogen, and is expected to become a next-generation large-scale hydrogen production method.
The hydrogen is produced by electrolyzing water, so that the electric energy generated by new energy can be converted into chemical energy to be stored in hydrogen, and the requirements of convenient transportation and continuous supply of energy can be met. The current commercial water electrolysis hydrogen production technology mainly comprises alkaline water electrolysis hydrogen production and proton exchange membrane water electrolysis hydrogen production. The proton exchange membrane water electrolysis hydrogen production technology has higher reaction current density and shorter response time, but the cost is high and large-scale development is difficult due to the need of expensive proton exchange membranes and noble metal catalysts. Therefore, the alkaline water electrolysis hydrogen production becomes the large-scale commercial water electrolysis hydrogen production technology with the most development potential. The existing mature commercial alkaline water electrolysis hydrogen production equipment mainly uses a commercial nickel net as a water electrolysis catalyst, uses an electrolyte solution which is a high-concentration KOH solution, then applies a certain bath pressure to electrolyze water under the working condition of about 80 ℃, and then separates, purifies and dries hydrogen and oxygen generated by a cathode and an anode to obtain high-purity hydrogen and oxygen.
Although the commercial nickel net water electrolysis catalytic material widely used at present has good stability, the intrinsic water electrolysis catalytic activity of the commercial nickel net water electrolysis catalytic material is not ideal, so that the water electrolysis process is accompanied by larger overpotential, the used electric quantity is increased rapidly, the cost of hydrogen production by water electrolysis is greatly increased, and the preparation of the water electrolysis catalytic material with high catalytic activity is urgently needed to reduce the cost of hydrogen production.
The invention content is as follows:
the porous nickel screen electrolyzed water catalytic material has high electrolyzed water catalytic activity, can effectively reduce the pressure of an electrolyzed water reaction tank, improve the efficiency of an electrolyzed water device and greatly reduce the hydrogen production cost.
One purpose of the invention is to provide a preparation method of a porous nickel screen electrolyzed water catalytic material, which comprises the following steps:
(1) in a two-electrode system, electrolyte is arranged in an electrolytic cell, a pretreated commercial nickel screen is used as a working electrode, a platinum sheet is used as a counter electrode, and after current is applied, a nickel nanoparticle layer is loaded on the commercial nickel screen by using an electrodeposition method to obtain the commercial nickel screen loaded with the nickel nanoparticle layer;
(2) and (2) taking the commercial nickel screen loaded with the nickel nanoparticle layer in the step (1) out of the electrolytic bath, washing and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
Preferably, the pretreatment step of the commercial nickel mesh pretreated in the step (1) is specifically: and sequentially placing the commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water, carrying out ultrasonic cleaning, and naturally drying to obtain the pretreated commercial nickel screen.
Preferably, the commercial nickel mesh in the step (1) is a 20-100 mesh commercial nickel mesh.
Preferably, the electrolyte in the step (1) is a mixed solution of nickel metal salt and ammonium chloride, the mass concentration of the nickel metal salt is 10-200g/L, and the mass concentration of the ammonium chloride is 50-200 g/L. More preferably, the mass concentration of the nickel metal salt is 50g/L, and the mass concentration of the ammonium chloride is 100 g/L.
Further preferably, the nickel metal is nickel sulfate, nickel chloride or nickel acetate.
Preferably, the current density is 0.1-3A cm-2. More preferably, the current density is 1-2A cm-2。
Preferably, the electrodeposition method applies voltage for 1-15 min. Further preferably, the electrodeposition method is applied for a voltage period of 5 to 10 min.
The invention also aims to provide the porous nickel screen electrolyzed water catalytic material prepared by the preparation method of the porous nickel screen electrolyzed water catalytic material.
The invention also protects the application of the porous nickel screen water electrolysis catalytic material in water electrolysis hydrogen production.
Preferably, the application is the application of the porous nickel net electrolytic water catalytic material as an electrolytic water catalyst.
Compared with the prior art, the invention has the following advantages:
1. different from the traditional electrodeposition method, the invention uses the hydrogen bubbles generated in the deposition process as a template by a bubble template electrodeposition method under the condition of larger cathode current, and the porous nano nickel layer is loaded on the surface of a smooth commercial nickel screen (as shown in figure 1) to obtain the porous nickel screen electrolyzed water catalytic material (as shown in figure 2).
2. The method has the advantages of short reaction time, simple and easy operation, stability, reliability, good repeatability and suitability for large-scale industrial production. In addition, compared with the currently used commercial nickel screen, the porous nickel screen water electrolysis catalytic material prepared by the invention has higher catalytic activity (as shown in fig. 3 and 4), and can effectively improve the efficiency during water electrolysis and reduce the energy consumption, thereby greatly reducing the cost for producing hydrogen by electrolyzing water.
Description of the drawings:
FIG. 1 is a scanning electron microscope image of a porous nano nickel layer supported on a smooth commercial nickel mesh in example 1, wherein a is a low magnification image and b is a high magnification image;
FIG. 2 is a scanning electron microscope image of the porous nickel mesh electrolytic water catalytic material of example 1, wherein a is a low magnification image, and b is a high magnification image;
FIG. 3 is a graph comparing the electrolyzed water performance of the porous nickel mesh electrolyzed water catalytic material prepared in example 1 with that of the commercial nickel mesh of comparative example 1;
FIG. 4 is a graph comparing the performance of the commercial nickel mesh of comparative example 1 and the electrolytic water catalytic materials of the porous nickel mesh prepared in examples 1 to 5.
The specific implementation mode is as follows:
the technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The equipment and reagents used in the present invention are, unless otherwise specified, conventional commercial products in the art.
The following test for catalytic activity of electrolytic water of comparative example 1 and examples 1 to 8: in a two-electrode system, 1mol/L potassium hydroxide solution is used as electrolyte, an electrocatalytic material is used as a cathode and an anode simultaneously, the electrolyte is used for carrying out electrolytic water performance test, and the overpotential of the catalytic material electrolytic water can be obtained according to a polarization curve.
Example 1
The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps:
(1) surface treatment of commercial nickel screen: placing a 40-mesh commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water in sequence, carrying out ultrasonic cleaning, and then naturally drying for later use;
(2) loading a nickel nanoparticle layer on the surface of a commercial nickel screen: in a two-electrode system, a 40-mesh commercial nickel screen treated in the step (1) is used as a working electrode, a platinum sheet is used as a counter electrode, and the size of the applied electrode is 2A cm-2After cathode current density ofThe nickel nano-particle layer is placed on a commercial nickel screen by using an electrodeposition method, and the electrolyte comprises the following components: nickel sulfate with concentration of 50g/L and ammonium chloride with concentration of 100g/L, and applying voltage for 10min by an electrodeposition method;
(3) cleaning a porous nickel screen: and taking the porous nickel screen out of the electrolytic bath, soaking the porous nickel screen in ultrapure water for a period of time, repeatedly washing the porous nickel screen with the ultrapure water, and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
Comparative example 1
The processing steps of the commercial nickel screen electrolytic water catalytic material are as follows: surface treatment of commercial nickel screen: the sample was placed in a 40 mesh commercial nickel screen in sequence in acetone, dilute hydrochloric acid and ultrapure water, subjected to ultrasonic cleaning, and then naturally dried for use.
Fig. 1 is a scanning electron microscope picture of a commercial nickel mesh from which it can be found that a conventional commercial nickel mesh electrolytic water catalyst has a net structure and the surface of a metal mesh is very smooth. The smooth structure has extremely small specific surface area, so that the surface area of the electrolytic water catalytic material which is directly contacted with the electrolyte is small, and the electrolytic water catalytic activity is low.
FIG. 2 is a scanning electron microscope picture of the porous nickel mesh electrolytic water catalytic material prepared in example 1. In comparison with the scanning electron microscope image of the commercial nickel mesh of comparative example 1 in fig. 1, it can be found that the surface roughness of the porous nickel mesh prepared in example 1 is significantly improved due to the formation and loading of nickel nanoparticles during electrodeposition. In addition, under the condition of large current, when nickel nanoparticles are formed, the surface of the nickel screen can generate electrocatalytic hydrogen evolution reaction to generate a large amount of hydrogen bubbles, and the bubbles overflow to enable the surface to have a porous structure. Compared with the smooth traditional commercial nickel net, the rough surface structure is beneficial to exposing more effective active surface area of the electrolyzed water catalytic material and increasing the contact area of the electrolyte and the catalytic material, thereby improving the electrocatalytic water catalytic activity and reducing the tank pressure of the electrolyzed water reaction. Meanwhile, the porous structure is beneficial to the transmission and diffusion of reactants and products, the dynamic process of the water electrolysis reaction is accelerated, and the reaction rate is greatly improved. Due to the advantages, the porous nickel net water electrolysis catalytic material can reduce the electricity consumption in the water electrolysis process so as to save the energy consumption and further greatly reduce the cost of hydrogen production by water electrolysis.
Fig. 3 is a comparison of the electrolytic water performance of the porous nickel mesh prepared in example 1 with that of the commercial nickel mesh in comparative example 1, and it can be found that the cell pressure of the porous nickel mesh is significantly lower than that of the commercial nickel mesh at the same current density.
Example 2
The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps:
1) surface treatment of commercial nickel screen: placing an 80-mesh commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water in sequence, carrying out ultrasonic cleaning, and then naturally drying for later use;
2) loading a nickel nanoparticle layer on the surface of a commercial nickel screen: in a two-electrode system, the 80-mesh commercial nickel screen treated in step (1) was used as a working electrode, a platinum sheet was used as a counter electrode, and a size of 2A cm was applied-2After cathodic current density of (a), a nickel nanoparticle layer was placed on a commercial nickel screen using an electrodeposition process, using an electrolyte consisting of: nickel sulfate with concentration of 50g/L and ammonium chloride with concentration of 100g/L, and applying voltage for 5min by an electrodeposition method;
3) cleaning a porous nickel screen: and taking the porous nickel screen out of the electrolytic bath, soaking the porous nickel screen in ultrapure water for a period of time, repeatedly washing the porous nickel screen with the ultrapure water, and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
Example 3
The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps:
(1) surface treatment of commercial nickel screen: placing a 40-mesh commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water in sequence, carrying out ultrasonic cleaning, and then naturally drying for later use;
(2) loading a nickel nanoparticle layer on the surface of a commercial nickel screen: in a two-electrode system, a 40-mesh commercial nickel screen treated in the step (1) is used as a working electrode, a platinum sheet is used as a counter electrode, and the size of the applied electrode is 1A cm-2After cathodic current density of (2), a nickel nanoparticle layer was electrodeposited on a commercial nickel screenThe electrolyte used comprises the following components: nickel acetate with the concentration of 50g/L and ammonium chloride with the concentration of 100g/L, and the deposition time is 5 min;
(3) cleaning a porous nickel screen: and taking the porous nickel screen out of the electrolytic bath, soaking the porous nickel screen in ultrapure water for a period of time, repeatedly washing the porous nickel screen with the ultrapure water, and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
Example 4
The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps:
(1) surface treatment of commercial nickel screen: placing a 40-mesh commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water in sequence, carrying out ultrasonic cleaning, and then naturally drying for later use;
(2) loading a nickel nanoparticle layer on the surface of a commercial nickel screen: in a two-electrode system, a 40-mesh commercial nickel screen treated in the step (1) is used as a working electrode, a platinum sheet is used as a counter electrode, and the size of the applied electrode is 0.5A cm-2After cathodic current density of (a), a nickel nanoparticle layer was placed on a commercial nickel screen using an electrodeposition process, using an electrolyte consisting of: nickel acetate with the concentration of 80g/L and ammonium chloride with the concentration of 100g/L, and the voltage is applied for 5min by an electrodeposition method;
(3) cleaning a porous nickel screen: and taking the porous nickel screen out of the electrolytic bath, soaking the porous nickel screen in ultrapure water for a period of time, repeatedly washing the porous nickel screen with the ultrapure water, and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
Example 5
The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps:
(1) surface treatment of commercial nickel screen: placing a 40-mesh commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water in sequence, carrying out ultrasonic cleaning, and then naturally drying for later use;
(2) loading a nickel nanoparticle layer on the surface of a commercial nickel screen: in a two-electrode system, a 40-mesh commercial nickel screen treated in the step 1) is used as a working electrode, a platinum sheet is used as a counter electrode, and the size of the applied electrode is 0.1A cm-2After cathodic current density of (a), a nickel nanoparticle layer is electrodeposited on commercial nickelOn the net, the electrolyte used consists of: nickel acetate with concentration of 50g/L and ammonium chloride with concentration of 100g/L, and applying voltage for 5min by an electrodeposition method;
(3) cleaning a porous nickel screen: and taking the porous nickel screen out of the electrolytic bath, soaking the porous nickel screen in ultrapure water for a period of time, repeatedly washing the porous nickel screen with the ultrapure water, and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
Example 6
The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps:
(1) surface treatment of commercial nickel screen: placing a 40-mesh commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water in sequence, carrying out ultrasonic cleaning, and then naturally drying for later use;
(2) loading a nickel nanoparticle layer on the surface of a commercial nickel screen: in a two-electrode system, a 40-mesh commercial nickel screen treated in the step 1) is used as a working electrode, a platinum sheet is used as a counter electrode, and the size of the applied electrode is 1A cm-2After cathodic current density of (a), a nickel nanoparticle layer was placed on a commercial nickel screen using an electrodeposition process, using an electrolyte consisting of: nickel sulfate with concentration of 50g/L and ammonium chloride with concentration of 100g/L, and applying voltage for 10min by an electrodeposition method;
(3) cleaning a porous nickel screen: and taking the porous nickel screen out of the electrolytic bath, soaking the porous nickel screen in ultrapure water for a period of time, repeatedly washing the porous nickel screen with the ultrapure water, and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
Example 7
The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps:
(1) surface treatment of commercial nickel screen: placing a 40-mesh commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water in sequence, carrying out ultrasonic cleaning, and then naturally drying for later use;
(2) loading a nickel nanoparticle layer on the surface of a commercial nickel screen: in a two-electrode system, a 40-mesh commercial nickel screen treated in the step 1) is used as a working electrode, a platinum sheet is used as a counter electrode, and the size of the applied electrode is 3A cm-2After cathodic current density of (2), nickel nanoparticles are electrodepositedThe grain layer is arranged on a commercial nickel net, and the electrolyte used comprises the following components: nickel chloride with the concentration of 200g/L and ammonium chloride with the concentration of 200g/L, and the voltage is applied for 15min by an electrodeposition method;
(3) cleaning a porous nickel screen: and taking the porous nickel screen out of the electrolytic bath, soaking the porous nickel screen in ultrapure water for a period of time, repeatedly washing the porous nickel screen with the ultrapure water, and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
Example 8
The preparation method of the porous nickel screen electrolyzed water catalytic material comprises the following steps:
(1) surface treatment of commercial nickel screen: placing a 40-mesh commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water in sequence, carrying out ultrasonic cleaning, and then naturally drying for later use;
(2) loading a nickel nanoparticle layer on the surface of a commercial nickel screen: in a two-electrode system, a 40-mesh commercial nickel screen treated in the step 1) is used as a working electrode, a platinum sheet is used as a counter electrode, and the size of the applied electrode is 0.1A cm-2After cathodic current density of (a), a nickel nanoparticle layer was placed on a commercial nickel screen using an electrodeposition process, using an electrolyte consisting of: nickel chloride with concentration of 10g/L and ammonium chloride with concentration of 50g/L, and applying voltage for 1min by an electrodeposition method;
(3) cleaning a porous nickel screen: and taking the porous nickel screen out of the electrolytic bath, soaking the porous nickel screen in ultrapure water for a period of time, repeatedly washing the porous nickel screen with the ultrapure water, and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
The porous nickel mesh electrolytic water catalytic materials prepared in examples 1 to 8 were subjected to an electrolytic water catalytic activity test, and the results are shown in FIG. 4, which shows that the catalyst concentration in 400mA cm is shown in FIG. 4-2The porous nickel mesh electrocatalyst prepared in example 1 has the smallest cell pressure, i.e., the optimal electrolyzed water catalytic activity, at the current density of (a).
The above embodiments are only for the purpose of helping understanding the technical solution of the present invention and the core idea thereof, and it should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims (10)
1. The preparation method of the porous nickel screen electrolyzed water catalytic material is characterized by comprising the following steps:
(1) in a two-electrode system, electrolyte is arranged in an electrolytic cell, a pretreated commercial nickel screen is used as a working electrode, a platinum sheet is used as a counter electrode, and after current is applied, a nickel nanoparticle layer is loaded on the commercial nickel screen by using an electrodeposition method;
(2) and (2) taking the commercial nickel screen loaded with the nickel nanoparticle layer in the step (1) out of the electrolytic bath, washing and naturally drying to obtain the porous nickel screen electrolytic water catalytic material.
2. The method for preparing the porous nickel screen electrolyzed water catalytic material as claimed in claim 1, wherein the pretreatment step of the commercial nickel screen pretreated in the step (1) is specifically as follows: and sequentially placing the commercial nickel screen in acetone, dilute hydrochloric acid and ultrapure water, carrying out ultrasonic cleaning, and naturally drying to obtain the pretreated commercial nickel screen.
3. The method for preparing the porous nickel screen electrolyzed water catalytic material as claimed in claim 1 or 2, wherein the commercial nickel screen in the step (1) is a 20-100 mesh commercial nickel screen.
4. The preparation method of the porous nickel screen electrolyzed water catalytic material as claimed in claim 1, wherein the electrolyte in step (1) is a mixed solution of nickel metal salt and ammonium chloride, the mass concentration of the nickel metal salt is 10-200g/L, and the mass concentration of the ammonium chloride is 50-200 g/L.
5. The method for preparing the porous nickel screen electrolyzed water catalytic material as claimed in claim 4, wherein the nickel metal is nickel sulfate, nickel chloride or nickel acetate.
6. Preparation of porous nickel screen electrolytic water catalytic material according to claim 1The method is characterized in that the current density is 0.1-3A cm-2。
7. The method for preparing the porous nickel screen electrolyzed water catalytic material as claimed in claim 1, wherein the electrodeposition method is applied for a voltage of 1-15 min.
8. The porous nickel screen electrolyzed water catalytic material prepared by the preparation method of the porous nickel screen electrolyzed water catalytic material of claim 1.
9. The use of the porous nickel mesh water electrolysis catalytic material of claim 8 in the production of hydrogen by water electrolysis.
10. The application of the porous nickel screen electrolyzed water catalytic material in hydrogen production by electrolyzing water according to claim 9, wherein the application is specifically the application of the porous nickel screen electrolyzed water catalytic material as a water electrolysis catalyst.
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