CN117779079A - Nickel-based self-supporting electrolytic water catalyst and preparation method and application thereof - Google Patents
Nickel-based self-supporting electrolytic water catalyst and preparation method and application thereof Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 13
- 238000004070 electrodeposition Methods 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 8
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 6
- 239000006260 foam Substances 0.000 claims abstract description 6
- 150000002815 nickel Chemical class 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 3
- 239000011574 phosphorus Substances 0.000 claims abstract description 3
- 238000000151 deposition Methods 0.000 claims description 14
- 230000008021 deposition Effects 0.000 claims description 14
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 12
- 239000002243 precursor Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 3
- 150000001868 cobalt Chemical class 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 229910021585 Nickel(II) bromide Inorganic materials 0.000 claims 1
- GFHNAMRJFCEERV-UHFFFAOYSA-L cobalt chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Co+2] GFHNAMRJFCEERV-UHFFFAOYSA-L 0.000 claims 1
- QGUAJWGNOXCYJF-UHFFFAOYSA-N cobalt dinitrate hexahydrate Chemical group O.O.O.O.O.O.[Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QGUAJWGNOXCYJF-UHFFFAOYSA-N 0.000 claims 1
- ZBYYWKJVSFHYJL-UHFFFAOYSA-L cobalt(2+);diacetate;tetrahydrate Chemical compound O.O.O.O.[Co+2].CC([O-])=O.CC([O-])=O ZBYYWKJVSFHYJL-UHFFFAOYSA-L 0.000 claims 1
- 229940044631 ferric chloride hexahydrate Drugs 0.000 claims 1
- 229960002089 ferrous chloride Drugs 0.000 claims 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims 1
- NQXWGWZJXJUMQB-UHFFFAOYSA-K iron trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].Cl[Fe+]Cl NQXWGWZJXJUMQB-UHFFFAOYSA-K 0.000 claims 1
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims 1
- SUOTZEJYYPISIE-UHFFFAOYSA-N iron(2+);dinitrate;hexahydrate Chemical group O.O.O.O.O.O.[Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O SUOTZEJYYPISIE-UHFFFAOYSA-N 0.000 claims 1
- SZQUEWJRBJDHSM-UHFFFAOYSA-N iron(3+);trinitrate;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O SZQUEWJRBJDHSM-UHFFFAOYSA-N 0.000 claims 1
- LAIZPRYFQUWUBN-UHFFFAOYSA-L nickel chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ni+2] LAIZPRYFQUWUBN-UHFFFAOYSA-L 0.000 claims 1
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 claims 1
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 claims 1
- IPLJNQFXJUCRNH-UHFFFAOYSA-L nickel(2+);dibromide Chemical compound [Ni+2].[Br-].[Br-] IPLJNQFXJUCRNH-UHFFFAOYSA-L 0.000 claims 1
- AOPCKOPZYFFEDA-UHFFFAOYSA-N nickel(2+);dinitrate;hexahydrate Chemical group O.O.O.O.O.O.[Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O AOPCKOPZYFFEDA-UHFFFAOYSA-N 0.000 claims 1
- FEONEKOZSGPOFN-UHFFFAOYSA-K tribromoiron Chemical compound Br[Fe](Br)Br FEONEKOZSGPOFN-UHFFFAOYSA-K 0.000 claims 1
- 239000002135 nanosheet Substances 0.000 abstract description 4
- 239000002057 nanoflower Substances 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 239000002064 nanoplatelet Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 13
- 239000002131 composite material Substances 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000010411 electrocatalyst Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004502 linear sweep voltammetry Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- -1 platinum group metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Catalysts (AREA)
Abstract
The application disclosesThe catalyst firstly loads a nano-sheet structure of CoP on foam Nickel (NF), and loads a nano-flower layer structure of NiFe-LDH on the CoP nano-sheet to form a multi-layer heterogeneous self-supporting stable structure. The preparation method comprises the following steps: first, co (OH) is directly grown in situ on the surface of foam nickel by electrochemical deposition 2 Nanoplatelets, then, the sample is placed in a tube furnace with NaH 2 PO 2 And (3) performing high-temperature phosphating on a phosphorus source to obtain a CoP nano sheet, and finally growing a NiFe-LDH nano flower layer on the CoP by using a water solution of nickel salt and ferric salt as an electrolyte solution through a simple electrochemical deposition method. The invention has the advantages of lower practical price, simple preparation method and good performance of the catalyst in the aspect of water electrolysis.
Description
Technical Field
The invention belongs to the field of electrocatalysis, and particularly relates to an electrolyzed water catalyst, a preparation method and application thereof.
Background
Hydrogen is one of the most ideal alternative energy carriers for traditional fossil fuels and is considered one of the most potential clean energy sources in the 21 st century. The water electrolysis is a high-efficiency clean industrial hydrogen production technology, and can prepare high-purity hydrogen.
Electrochemical water splitting consists of two half reactions: hydrogen Evolution Reaction (HER) on the cathode and Oxygen Evolution Reaction (OER) on the anode. The minimum voltage to drive OER and HER simultaneously is theoretically 1.23V, but additional potential is required to deactivate and overcome the original reaction energy barrier, i.e. overpotential (η), during the actual electrolysis process. Therefore, reducing the overpotential of water electrolysis and reducing the energy consumption as much as possible is a key for hydrogen production by water electrolysis. The development of catalysts with high selectivity and high stability is key to the development of water electrolysis technology. Currently, platinum group metals and oxides of Ir and Ru are the benchmark electrocatalysts for HER and OER, respectively, but the scarcity and high cost of these noble metals severely hamper their large-scale practical use.
The nickel-based catalyst has low preparation cost and is easy to obtain, and has potential in industrial application prospect. It is found that pure nickel metal material can not provide high catalytic activity, and if three-dimensional nano material is designed on the surface of the material, the electrocatalytic performance of the material can be obviously improved. This is because the carrier can enhance the activity by interacting with the catalyst, or provide more contact area for the catalyst, etc.
Disclosure of Invention
Aiming at the problems, the invention provides a novel nickel-based catalyst and a preparation method thereof, wherein the preparation method is simple, the catalyst cost is low, and the catalyst has a good catalytic effect in water electrolysis.
In order to achieve the above purpose, the present invention provides the following technical solutions:
on the one hand, the invention provides a self-supporting water electrolysis catalyst which has good electro-catalytic OER performance in the water electrolysis process and has the characteristics of low overpotential and strong catalytic stability.
In another aspect, the present invention provides a method for preparing the catalyst, which includes the following steps:
step one: firstly, respectively placing an NF in hydrochloric acid solution, ethanol and deionized water for ultrasonic cleaning to remove surface impurities;
step two: carrying out electrochemical deposition on NF (fluorine) treated in the first step by taking aqueous solution of cobalt salt as electrolyte solution under a three-electrode system, taking Ag/AgCl as a reference electrode, taking a platinum sheet as a counter electrode, taking NF as a working electrode, wherein the deposition voltage is-1.5- (-0.5) V, the deposition time is 1-60min, and washing and drying after reaction to obtain a precursor 1;
step three: the precursor 1 is placed at the downstream of a tube furnace and is added with 0.1 g to 5g of NaH 2 PO 2 The precursor 2 is obtained by high-temperature phosphating under flowing argon gas, wherein the phosphating temperature is 200-400 ℃ and the phosphating time is 0.1-4h;
step four: and (3) carrying out electrochemical deposition again on the precursor 2 obtained in the step (III) by taking the aqueous solution of nickel salt and ferric salt as an electrolyte solution under a three-electrode system, taking Ag/AgCl as a reference electrode, taking a platinum sheet as a counter electrode, taking the precursor 2 as a working electrode, wherein the deposition voltage is-1.5- (-0.5) V, the deposition time is 1-60min, and washing and drying after the reaction to obtain the electrolytic seawater catalyst.
The invention has the advantages that:
1. the catalyst is a CoP@NiFe-LDH/NF self-supporting electrode, can effectively carry out water electrolysis, and utilizes a CoP nanosheet as a precursor, grows the NiFe LDH with a nanoflower structure on the surface with abundant defects through a simple electrochemical deposition method, and has excellent electrocatalyst performance.
2. The preparation process of the invention has simple and controllable operation, lower raw material cost and better catalyst performance, and has potential of industrial application.
Description of the drawings:
FIG. 1 is a graph of LSV for the OER test of example 1, comparative examples 1-3 of the present invention;
FIG. 2 is an EIS diagram of inventive example 1, comparative examples 1-3;
FIG. 3 is an OER stability graph of example 1 of the present invention;
FIG. 4 is an SEM image of the catalyst prepared in example 1;
FIG. 5 is a TEM image of the catalyst prepared in example 1;
FIG. 6 is an XRD pattern of the catalyst prepared in example 1;
FIG. 7 is an SEM image of the catalyst prepared in comparative example 2.
The specific embodiment is as follows:
the present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, under the precondition of no conflict, the following embodiments can be arbitrarily combined to form new embodiments.
Example 1:
the preparation process of the nickel-based self-supporting water electrolysis catalyst comprises the following steps:
(1) And respectively placing a piece of NF in 3M hydrochloric acid solution, ethanol and deionized water, sequentially performing ultrasonic cleaning for 10min to remove surface impurities, and placing into a vacuum oven to dry at 60 ℃ for 6h for standby.
(2) The NF treated in the step (1) is treated by Co (NO) 3 ) 2 Electrochemical deposition is carried out on aqueous solution (30 mM) serving as electrolyte solution under a three-electrode system, ag/AgCl serving as a reference electrode, a platinum sheet serving as a counter electrode and NF serving as a working electrode, the deposition voltage is-1V, the deposition time is 20min, deionized water is repeatedly used for flushing after the deposition is finished, and the solution is put into a vacuum oven to be dried for 6h at 60 ℃ to obtain light blue Co (OH) 2 /NF。
(3) Co (OH) obtained in the step (2) 2 the/NF was placed downstream of the tube furnace and 0.5g NaH was weighed 2 PO 2 And the phosphorus source is placed at the upstream of a tube furnace, and is subjected to high-temperature phosphating under flowing argon to obtain black CoP/NF, wherein the phosphating temperature is 350 ℃, and the phosphating time is 2 hours.
(4) The CoP/NF obtained in the step (3) is treated with Ni (NO) 3 ) 2 (20 mM) and Fe (NO) 3 ) 3 And (3) carrying out electrochemical deposition again by taking the aqueous solution (20 mM) as an electrolyte solution under a three-electrode system, wherein Ag/AgCl is a reference electrode, a platinum sheet is a counter electrode, coP/NF is a working electrode, the deposition voltage is-1V, the deposition time is 20min, repeatedly flushing with deionized water after the deposition is finished, and drying in a vacuum oven at 60 ℃ for 6h to obtain the electrolytic seawater catalyst CoP@NiFe LDH/NF composite material. The mass difference before and after the foam nickel load is measured by a microbalance to obtain the load of 6mg cm -2 。
Comparative example 1:
comparative example 1 differs from example 1 in that: and (3) performing only the steps (1) and (2) to obtain the Co (OH) 2/NF composite material.
Comparative example 2:
comparative example 2 differs from example 1 in that: step (4) was omitted and the remainder was the same as in example 1 to obtain a CoP/NF composite.
Comparative example 3:
comparative example 3 differs from example 1 in that: omitting the step (2) and the step (3), changing the working electrode in the step (4) into NF treated in the step (1), and obtaining the NiFe LDH/NF composite material by the rest being the same as in the example 1.
Experimental example 1:
the products obtained in examples 1, comparative examples 1 to 3 were subjected to an electrolytic water OER test as catalyst in a solution of electrolyte 1.0M KOH+0.5M NaCl, the electrochemical test being carried out on an electrochemical workstation (CHI 760E), using a standard three-electrode system in which the Hg/HgO electrode is a reference electrode and the graphite electrode is a counter electrode, the products prepared in inventive examples 1, comparative examples 1 to 3 being working electrodes (geometric area 1cm x 1 cm). Linear Sweep Voltammetry (LSV) at O 2 At 5mV s in saturated electrolyte -1 The equation evs.rhe=evs.hg/hgo+0.059×ph+0.098 calculates the potential versus the potential of the Reversible Hydrogen Electrode (RHE). The Electrochemical Impedance (EIS) test frequency range was 0.01-100000Hz and the amplitude was 5mV. At current densities of 100 and 300mA cm -2 Under the condition of (1) and tested by using a time current curveElectrochemical stability.
The results are shown in the graph, wherein FIG. 1 shows the OER performance of example 1, comparative examples 1-3, and it is seen that the cop@NiFe-LDH/NF has the lowest overpotential at a current density of 100mA cm -2 The OER overpotential of this material was 260mV at this time.
FIG. 2 is an EIS test curve of example 1, comparative examples 1-3, showing the CoP@NiFe-LDH/NF composite material versus Co (OH) 2 Compared with the composite materials of/NF, coP/NF and NiFe LDH/NF, the composite materials of/NF have the minimum internal resistance, are beneficial to reducing the polarization phenomenon of the catalyst in the catalytic process, and can effectively reduce the overpotential of the catalyst in the catalytic process.
FIG. 3 is a graph of CoP@NiFe-LDH/NF self-supporting electrode when current densities are 100 and 300mA cm -2 When the reaction of the electrolyzed water is up to 24 hours, the reaction is almost free from attenuation.
In summary, the present invention provides a high activity electrolyzed water catalyst which is capable of effectively reducing polarization in an electrocatalytic process, so that the catalyst exhibits a low overpotential in the catalytic process. The invention forms a stable multilayer heterostructure on the foam nickel by a simple electrodeposition-phosphating-electrodeposition method, simplifies the preparation process and improves the long-term stability of the catalyst.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (9)
1. The preparation method of the high-activity electrolyzed water catalyst is characterized by comprising the following steps:
1) Taking the cleaned foam nickel as electrolyte, performing electrochemical deposition under a three-electrode system, washing after reaction, and drying to obtain a precursor 1;
2) The precursor 1 is arranged at the downstream of a tube furnace, naH 2 PO 2 The precursor 2 is obtained by high-temperature phosphating under flowing argon as a phosphorus source and placed at the upstream of a tube furnace;
3) And (3) carrying out electrochemical deposition again on the precursor 2 obtained in the step (2) by taking the aqueous solution of nickel salt and ferric salt as an electrolyte solution under a three-electrode system, washing and drying after the reaction to obtain the water electrolysis catalyst.
2. The method according to claim 1, step 1), wherein the three-electrode system is an Ag/AgCl reference electrode, a platinum sheet is a counter electrode, and a nickel foam is a working electrode; the deposition voltage is-1.5 to-0.5V, and the deposition time is 1 to 60 minutes.
3. The method of claim 1, step 1), wherein the cobalt salt is cobalt nitrate hexahydrate, cobalt chloride hexahydrate, or cobalt acetate tetrahydrate; the concentration is 1-100mmol/L.
4. The method of claim 1, step 1), wherein the washing solution is deionized water and the drying time is 1-12 hours and the drying temperature is 60-100 ℃.
5. The method of claim 1, step 2), wherein the NaH 2 PO 2 The mass is 0.1-5g, the phosphating temperature is 200-400 ℃, and the phosphating time is 0.1-4h.
6. The method according to claim 1 and 3), wherein the three-electrode system is an Ag/AgCl reference electrode, the platinum sheet is a counter electrode, and the precursor 2 is a working electrode; the deposition voltage is-1.5- (-0.5) V, and the deposition time is 1-60min.
7. The method of claim 1, step 3), wherein the nickel salt is nickel nitrate hexahydrate, nickel sulfate hexahydrate, nickel chloride hexahydrate or nickel bromide; the ferric salt is ferrous nitrate hexahydrate, ferric nitrate nonahydrate, ferrous sulfate heptahydrate, ferric chloride hexahydrate, ferrous chloride tetrahydrate or ferric bromide; the mass ratio of the nickel salt to the ferric salt is 1:0.1-10, the concentration of the nickel salt is 1-50mmol/L, and the concentration of the ferric salt is 1-50mmol/L.
8. The method according to claim 1, step 3), wherein the washing solution is deionized water, the drying time is 1-12 hours, and the drying temperature is 60-100 ℃.
9. Use of an electrolyzed water catalyst according to claim 1 or prepared according to the method of any of claims 2 to 8, wherein the catalyst is used in a water electrolysis reaction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311813312.XA CN117779079A (en) | 2023-12-27 | 2023-12-27 | Nickel-based self-supporting electrolytic water catalyst and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311813312.XA CN117779079A (en) | 2023-12-27 | 2023-12-27 | Nickel-based self-supporting electrolytic water catalyst and preparation method and application thereof |
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| CN117779079A true CN117779079A (en) | 2024-03-29 |
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| CN202311813312.XA Pending CN117779079A (en) | 2023-12-27 | 2023-12-27 | Nickel-based self-supporting electrolytic water catalyst and preparation method and application thereof |
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