137 results about "Nickel electrode" patented technology

The invention belongs to the technical field of nickel electrode slurry preparation, discloses a preparation process of ultra-fine particle size roll-printed nickel electrode slurry for an ultra-high capacity MLCC, and aims to solve the problems that in the prior art, ultra-fine nickel powder is easy to oxidize, the cost of covering nickel nitride powder is high, a covering layer is easy to damage and agglomerate during dispersion, and the performance of the slurry is poor. The method comprises three steps of raw material pretreatment, synchronization of material dispersion and nitridation, post-treatment and nitrogen protection, wherein the pretreatment is used for removing impurities and preventing oxidation, dispersion and nitridation are carried out synergistically through a sand mill and an ultrahigh-pressure homogenizer in a graded regulation and control mode, the post-treatment comprises filtering, inspection and double-layer vacuum packaging, the raw materials are prepared according to a specific proportion, key parameters are precisely regulated and controlled, and finally the slurry is prepared. Roll printing adaptability and co-firing requirements are met, independent nitridation and reduction procedures are omitted, cost is reduced, slurry uniformity, dispersion stability and MLCC reliability are improved, and large-scale mass production can be achieved.

The invention discloses a praseodymium-copper heterogeneous catalyst for synthesizing a multi-carbon alcohol product through efficient electroreduction of carbon dioxide and a preparation method of the praseodymium-copper heterogeneous catalyst. The praseodymium-copper heterogeneous catalyst is a composite material of praseodymium oxide and copper oxide, and praseodymium, copper and oxygen are uniformly distributed in the praseodymium-copper heterogeneous catalyst; the praseodymium oxide is an oxide with the praseodymium-oxygen molar ratio of 6: 11; the molar ratio of praseodymium to copper is not less than 2. The invention provides a method for preparing a multi-carbon alcohol product by electrocatalytic reduction of carbon dioxide, which comprises the following steps: by taking a mercury / mercuric oxide electrode as a reference electrode, a foamed nickel electrode as a counter electrode and a praseodymium-copper heterogeneous catalyst as a working electrode, carrying out electrochemical reduction in a gas diffusion type flowing electrolytic tank to obtain the multi-carbon alcohol product. The praseodymium-copper heterogeneous catalytic material is designed, and the interaction relationship between metal and a carrier and between the metal and the carrier and a reaction intermediate in the catalyst is adjusted by introducing the rare earth element praseodymium, so that the reaction activity and the target product selectivity are improved.

The invention discloses a ruthenium and samarium double monatomic doped three-dimensional titanium-based tin antimony nickel electrode and a preparation method and application thereof. The preparation method of the electrode comprises the following steps: (1) pretreating the titanium felt; (2) preparing a sol impregnation liquid; (3) sol coating and drying: dipping the pretreated titanium felt in the prepared sol dipping liquid, fully adsorbing and then drying to form a uniform precursor layer; and (4) roasting treatment is conducted, specifically, the dried titanium felt is placed in a muffle furnace to be roasted, and then the steps of dipping, drying and roasting are repeated till the final ruthenium and samarium double monatomic doped three-dimensional titanium-based tin-antimony-nickel electrode is obtained. In the prepared electrocatalyst, ruthenium and samarium are doped into a tin-antimony-nickel electrode in a monatomic form, the utilization efficiency of ruthenium and samarium atoms is improved, and the electrode is endowed with excellent electrocatalytic activity. The unique three-dimensional structure and double-monatomic doping significantly enhance the electron transfer rate and the reaction kinetic characteristics, so that the electrode shows excellent stability and efficient hypochlorous acid generation ability.

The invention discloses conductive paste, a crystalline silicon solar cell and a preparation method of the crystalline silicon solar cell, and belongs to the technical field of photovoltaic cells. The conductive paste comprises glass powder which accounts for 1.5 wt%-6 wt% of total solids in the conductive paste; an organic carrier accounting for 9 wt% to 15 wt% of total solids in the conductive paste; a first conductive metal, which accounts for 70 wt% to 88 wt% of total solids in the conductive paste; a second conductive metal which accounts for 1 wt% to 10 wt% of the total solid content in the conductive paste; wherein the specific surface area of the second conductive metal is larger than 0.5 m < 2 > / g and smaller than 1.8 m < 2 > / g, and the second conductive metal is selected from nickel or nickel alloy. The nickel or the nickel alloy with the specific surface area is adopted to replace part of silver, the influence on the density of a sintered silver structure and the conductivity of a silver / nickel electrode can be reduced, the photoelectric conversion efficiency of the solar cell can be maintained by adding the nickel powder, and the preparation cost of the solar cell can be reduced by reducing the use amount of the silver.

The invention discloses an activation-free porous nickel catalytic electrode material and a preparation method and application thereof, and belongs to the technical field of electrocatalysis, the preparation method comprises the following steps: dispersing a pore-forming agent in a nickel sulfate solution, and reacting to obtain nickel-coated pore-forming agent composite powder; spraying the nickel-coated pore-forming agent composite powder serving as an electrode coating onto a nickel net base material to obtain a composite electrode; carrying out roasting treatment on the composite electrode so as to burn out the pore forming agent in the electrode coating; and putting the roasted composite electrode into a reduction solution, and reacting to obtain the activation-free porous nickel catalytic electrode material. The method effectively avoids the problem of waste alkali liquor treatment in the preparation process, is more environment-friendly and lower in cost, and also avoids the problems of diaphragm blockage and voltage rise caused by dissolution of residual metal aluminum after long-term operation. A developed pore structure is constructed in the nickel electrode coating through heat treatment and liquid phase reduction, the electrode has high porosity and rich active sites, and transfer of electrons and mass transfer of electrolyte are effectively enhanced.

The invention belongs to the technical field of electrode plates, and particularly relates to a high-activity binary alloy hydrogen evolution electrode plate and a preparation process method. The preparation process method comprises the following steps: obtaining a metal nickel electrode substrate and white corundum sand with different particle sizes; carrying out cleaning treatment on the metal nickel initial electrode substrate; the pretreated metal nickel initial base body serves as a working electrode, and sand blasting pretreatment is conducted on a metal nickel electrode base body through white corundum sand; dust removal operation is conducted on the metal nickel electrode base body subjected to sand blasting pretreatment; and spraying binary metal alloy powder on the intermediate hydrogen evolution electrode plate through an atmospheric plasma spraying process to form the high-activity binary alloy hydrogen evolution electrode plate. The whole preparation process method sequentially comprises the steps of cleaning treatment, sand blasting pretreatment, atmospheric plasma spraying, natural cooling and the like, the process method for preparing the electrode plate is optimized, it is guaranteed that the electrode plate has excellent long-time hydrogen evolution stability when the electrode plate is subjected to a hydrogen evolution reaction, and the excellent hydrogen production effect can be achieved.

The invention discloses a three-dimensional porous sulfur-doped tin-antimony-nickel electrode and a preparation method and application thereof.The specific operation process includes the steps that a carrier is pretreated, the titanium carrier is used as a substrate, a sulfur-containing surfactant and tin-antimony-nickel metal salt are used as precursors, absolute ethyl alcohol and hydrochloric acid are used as solvents, and the three-dimensional porous sulfur-doped tin-antimony-nickel electrode is obtained; loading a sulfur-containing nanoparticle precursor material on the surface of the titanium carrier through a hydrothermal method; and drying the hydrothermal precursor material, and roasting in a muffle furnace to finally obtain the three-dimensional porous sulfur-doped tin-antimony-nickel-titanium substrate electrode. The catalyst disclosed by the invention has a three-dimensional porous spherical structure, the active specific surface area is obviously increased, the path of diffusing reactants to active sites is effectively shortened, the mass transfer resistance is reduced, the transfer of electrons and protons is promoted, and the reaction performance is improved. Sulfur doping not only improves the electrochemical reaction rate, conductivity and stability, but also shows high activity and high Faraday efficiency in electrocatalytic ozone production and chlorine evolution reactions.

The invention relates to an activation method of a Raney nickel electrode and the Raney nickel electrode. The activation method comprises the steps of electrode preparation, high-temperature hot alkali treatment, electrochemical anode activation and cleaning and post-treatment. Wherein in the high-temperature hot alkali treatment, a nickel-aluminum alloy sheet is placed in a sodium hydroxide solution with specific concentration and temperature to dissolve surface aluminum to form a primary porous structure; electrochemical anode activation is carried out by taking the treated electrode as an anode and an inert material electrode as a cathode, and deep aluminum is further removed under specific potential and time; and finally cleaning and drying to obtain the activated electrode. Compared with the prior art, the method utilizes the synergistic effect of high-temperature hot alkali and electrochemistry, overcomes the problem that deep aluminum is not dissolved thoroughly in traditional hot alkali treatment, can greatly shorten the activation time, reduce aluminum residues and protect the electrode structure, has the advantages of simplicity in operation, environmental protection, high efficiency and the like, improves the catalytic performance and stability of the Raney nickel electrode, and is suitable for industrial production. The method is suitable for industrial production application.

The invention discloses a Raney nickel electrode for producing hydrogen by electrolyzing water and a preparation method of the Raney nickel electrode. The preparation method comprises the steps of electro-deposition of a porous nickel substrate, electro-deposition of a nickel-zinc alloy on the porous nickel substrate, chemical dezincification activation of the nickel-zinc alloy, electro-curing of the activated Raney nickel electrode and the like. Through a technical route of combining electro-deposition and activation curing treatment, on the basis of ensuring high catalytic activity and high specific surface area, controllable design of a microstructure is realized, and the mechanical strength and stability of the electrode are remarkably improved. The Raney nickel electrode prepared by the invention is suitable for a water electrolysis hydrogen production process, and especially shows excellent durability and electro-catalytic performance under complex industrial conditions such as large current, high temperature and high voltage.

The invention relates to a preparation method of a nickel-chromium-iron alloy consumable electrode, the consumable electrode and an alloy ingot. The method comprises the steps that an electrolytic nickel plate is subjected to vacuum melting under the condition that the vacuum degree is smaller than or equal to 0.67 Pa, after the electrolytic nickel plate is melted down, the vacuum degree is kept to be smaller than 2 Pa and lasts for 5 min to 10 min, and a nickel melt with the lead removal rate larger than or equal to 60% is obtained; pouring the nickel melt into a pure nickel electrode under a vacuum condition; combining the pure nickel electrode with industrial pure iron to form an iron-nickel composite electrode; with the iron-nickel composite electrode as a consumable electrode, ferrochrome is added into a lined electroslag furnace for smelting, and a high-temperature metal melt is obtained; the high-temperature metal melt is tapped to a steel ladle, and argon is blown to the bottom of the high-temperature metal melt in the steel ladle for 3-5 min; and the high-temperature metal melt obtained after bottom argon blowing is poured into the consumable electrode. According to the method, five types of fusible elements including Pb, Bi, Sn, As and Sb are systematically and gradually reduced to be extremely trace by coupling three steps of vacuum volatilization, deep electroslag separation and secondary ladle refining.

Provided is a preparation process for 10T large single weight wide nickel coil, based on a vacuum consumable arc furnace, a secondary melting method is used for melting the prepared large single weight nickel electrode, and the technical parameters during melting are optimized and improved, solving the problems of large single weight nickel coil preparation difficulty, easy to produce pores, inclusions and deep shrinkage holes under the traditional preparation process, the preparation process is simple, the cost is low, the quality and yield of the nickel ingot after melting are improved, so that the quality of the nickel coil is guaranteed, and the preparation of large single weight high quality wide nickel coil products is especially suitable.

The present application relates to a kind of nickel-zinc iron ternary oxygen electrode and its preparation method and application, including the following steps: (a) on the conductive substrate, electrodepositing nickel-zinc pre-plating layer is plated;(b) the conductive substrate of the nickel-zinc pre-plating layer of plating is as anode, nickel electrode is as cathode, be placed in the hydroxide aqueous solution containing iron source, under the condition of 70-90 DEG C, anode potential 1.8V~2.2V electrochemical oxidation is carried out.The conductive substrate of the nickel-zinc pre-plating layer of plating is as anode, nickel electrode is as cathode to carry out electrochemical oxidation, so that the metal zinc in pre-plating layer can be anodically dissolved, and soluble zincate ion is generated, so that abundant pore and defect are formed in-situ in electrode interior;Iron ion in electrolyte occurs replacement reaction on dissolved zinc site or exposed nickel site, and is introduced into electrode skeleton;So that more stable, active, and substrate combined firmly Porous ternary nickel-zinc iron composite electrode is finally obtained.

The invention provides a nickel electrode with a multi-level structure and a preparation method thereof. The preparation method mainly comprises the following steps: preparing a bottom-layer concave-convex substrate structure by mixed acid dipping, and forming a middle layer and a catalyst layer structure by surface heterogeneous growth. According to the method, tight combination of the catalyst layer and the substrate is taken as a guide, the uneven nickel metal substrate is obtained through mixed acid etching aiming at the problem that the catalyst is prone to falling off, and a highly rough surface is provided for in-situ growth of a subsequent columnar middle layer. The nickel metal substrate and the nanoflower layer catalyst are connected through the middle layer, the binding force of the catalyst and the substrate is effectively increased, the catalyst is prevented from falling off, and industrial stable water electrolysis is achieved. The surface of the synthesized nickel electrode with the multi-level structure has excellent performance stability, the overpotential is only increased by 8 mV when the nickel electrode runs for 1000 hours under the current density of 500 mA cm <-2 >, and only 1.83 V is needed when the nickel electrode is in an electrolytic bath.

Provided is a method for producing fluorine gas that does not readily generate mist. The fluorine gas is produced by a method provided with an electrolysis step in which the fluorine gas is generated by electrolyzing an electrolyte solution using an anode and a cathode in an electrolytic cell. And the electrolyte contains hydrogen fluoride, metal fluoride and hexafluoronickel (IV) acid metal salt. The anode is a nickel electrode or a carbonaceous electrode, and the cathode is a metal electrode.

In the present invention, a slurry for a second cathode mixture is applied to both edge regions of an electrode sheet holing portion during storage of an electrode sheet having a high content of nickel, wherein the edge regions are vulnerable to moisture penetration and high in rolling reduction ratio and the slurry contains a cathode active material more resistant to rolling than that applied to the center region of the holding portion, whereby the reactivity of nickel and moisture is suppressed as much as possible to improve the lifespan characteristics of the battery.

The application provides a high-porosity Raney nickel electrode and a preparation method thereof, and relates to the technical field of Raney nickel electrodes and preparation thereof. The preparation method of the high-porosity Raney nickel electrode effectively controls the dealuminization rate and the pore uniformity through a preparation process of'sintering treatment + special electrochemical dealloying treatment', and stably prepares the high-porosity Raney nickel electrode. A new process for preparing the high-porosity Raney nickel electrode in an environmentally friendly manner is provided, which replaces the traditional corrosion pore-forming process of a strong alkaline chemical solution and reduces pollution. The prepared high-porosity Raney nickel electrode has a high porosity of up to 52%, and the pore structure is stable, so that the catalytic activity and mechanical stability of the electrode are effectively improved.

This invention relates to the field of nickel electrode paste preparation technology, and discloses an ultrafine roller-printed nickel paste for ultra-high capacitance MLCCs and its preparation method. The nickel paste includes nickel powder, Ni3Sn-coated nickel powder, diffusion barrier phase, resin, solvent, dispersant, and rheology modifier. The Ni3Sn-coated nickel powder is obtained by chemical plating, where Sn is bonded to Ni in the form of an intermetallic compound. The diffusion barrier phase is selected from nano-ZrO2 or TiO2 particles. After pre-dispersing each solid component with a portion of the dispersant and solvent, the mixture is ground and dispersed using a gradient grinding process, then mixed with an organic carrier to form a paste. After vacuum degassing and filtration, the nickel paste is obtained. This invention uses Ni3Sn-coated nickel powder to replace elemental Sn powder, inhibiting the formation of a dense SnO2 passivation layer. Combined with the blocking effect of the diffusion barrier phase at the grain boundaries and the protection of the coating layer integrity by the gradient grinding process, this invention solves the problem of long-term reliability degradation of MLCCs caused by Sn storage.

The invention relates to a method for preparing a flexible thin film thermocouple through silk-screen printing. The preparation method comprises the following steps: mixing and stirring a copper precursor, a nickel precursor and metal particles in an alcohol solvent; processing the obtained mixture on a substrate in a silk-screen printing manner; heating and sintering the obtained substrate in an inert atmosphere to obtain a copper-nickel electrode; the copper precursor and copper particles are mixed and stirred in an alcohol solvent, and copper electrode slurry is obtained; aligning the obtained copper-nickel electrode with a corresponding hot node of a silk-screen printing plate, coating the silk-screen printing plate with the obtained copper electrode slurry, and carrying out silk-screen printing to obtain a copper electrode pattern; and heating and sintering the copper electrode pattern in an inert atmosphere to obtain the flexible film thermocouple. According to the method, the flexible film thermocouple which is high in material utilization rate, simple in processing technology, low in equipment requirement and excellent in sensing performance can be rapidly prepared.

Provided is a device for producing an electrolyte solution for fluorine gas production having a low vapor pressure of hydrogen fluoride gas. An electrolyte solution production device (1) is provided with: an anode (3) having a nickel electrode (31) and a carbon electrode (32); a cathode having a metal electrode; and an electrolyte solution production tank (2) capable of accommodating a liquid to be treated (8) containing potassium fluoride and hydrogen fluoride and performing electrolytic treatment of the liquid to be treated (8) using the anode (3) and the cathode (4). The electrolyte solution production device (1) has a configuration capable of applying a direct current to both the nickel electrode (31) and the carbon electrode (32).

The present invention belongs to the field of electrode material technology, and provides a titanium-based platinum-nickel electrode material, a preparation method thereof, and an application thereof. The method comprises the following steps: sequentially performing a first anodization and a second anodization on a titanium sheet in an ammonium fluoride solution to obtain an oxidized titanium sheet; calcining the oxidized titanium sheet to obtain a titanium sheet containing a titanium dioxide layer; and electro-depositing the titanium sheet containing the titanium dioxide layer in a platinum-based electrolyte to obtain a titanium-based platinum-nickel electrode material. The titanium-based platinum-nickel electrode material prepared by the present invention effectively reduces the usage of Pt-based precious metals, and can maintain high activity and stability to generate hydrogen peroxide online under neutral conditions; its cathode current density efficiency reaches 76.40%, its anode current density efficiency reaches 70.23%, and its dual capacitance value is 1.33mF·cm ‑2 It is 4.2 times the dual capacitance value of titanium-based platinum-nickel electrode materials obtained without anodic oxidation, and has good prospects for industrial application.

The application provides a hollow thorn ball-like phosphorus-doped cobalt nonanethiolate / nickel foam electrode material and a preparation method thereof, and belongs to the technical field of supercapacitor electrode material preparation. The preparation method is as follows: taking nickel foam (NF) as a current collector, pretreating the NF, preparing a Co(OH)F-NF precursor through hydration, preparing Co9S8-NF through sulfuration, and finally preparing the hollow thorn ball-like P-Co9S8-NF electrode material through phosphorus doping. The preparation process is simple, easy to realize, and low in preparation cost, and can lay a technical support for the preparation of supercapacitor high-conductivity, high-structural-stability and high-energy-storage electrode materials, and has good application value and prospect in the field of supercapacitor electrode materials.

The invention relates to the technical field of electrode performance testing, and discloses a novel hydrogen evolution nickel electrode accelerated aging life testing device which comprises an electrolytic bath fixedly installed on a supporting frame, a sealing cover is installed on the top of the electrolytic bath, an inner cavity of the electrolytic bath is divided into an anode chamber and a cathode chamber through a diaphragm, and an electrode nickel plate is fixedly installed in the cathode chamber. A hydrogen outlet is formed in one side of the electrolytic cell, an exhaust valve is installed on the hydrogen outlet, and an inner communicating assembly is arranged in the exhaust valve. According to the novel nickel electrode accelerated aging life testing device for hydrogen evolution, along with continuous increase of nitrogen in an air inlet groove, the nitrogen enables a pushing piece to move towards the side away from an exhaust valve, the outer surface of an annular air bag tightly abuts against the inner wall of the exhaust valve, and then the nitrogen in the air inlet groove passes through an inner cavity of an air conveying ring and is sprayed out from the end of an air spraying pipe; the inner side of the exhaust valve is rapidly filled with nitrogen, and redundant air and nitrogen flow to the rear side, so that when the exhaust valve is opened, the hydrogen cannot be in contact reaction with the air.

The application belongs to the technical field of wastewater treatment, and particularly relates to a reduced graphene oxide modified foam nickel electrode for an electro-Fenton method, a preparation method and application, and the preparation method of the reduced graphene oxide modified foam nickel electrode for the electro-Fenton method, characterized by comprising the following steps: S1: pretreating a foam nickel sheet, ultrasonic cleaning, and obtaining the pretreated foam nickel sheet; S2: configuring an oxidized graphene solution, performing hydrothermal reaction on the foam nickel sheet obtained in S1 and the oxidized graphene solution, cleaning, freeze-drying, and obtaining the reduced graphene oxide modified foam nickel electrode. The preparation method of the reduced graphene oxide modified foam nickel electrode for the electro-Fenton method has the effect of improving the electro-Fenton efficiency, thereby promoting the degradation of oil and gas field wastewater.

The clamp comprises a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are oppositely arranged, the inner end faces of the first clamping plate and the second clamping plate are inclined faces parallel to each other, the first clamping plate and the second clamping plate are fixed to a sawing machine through sawing machine clamping assemblies arranged on the outer sides of the first clamping plate and the second clamping plate, and the inclination angle of each inclined face is alpha, during sawing, the nickel electrode cast ingot is clamped between the first clamping plate and the second clamping plate, so that the end of the nickel electrode cast ingot and a saw blade on the sawing machine form an alpha included angle. When a plurality of nickel electrode cast ingots prepared by the clamp are assembled and welded together through the inclined surfaces of the end parts to prepare large-size nickel and nickel alloy cast ingots, the problem of poor transition of the welding stubble part of the nickel electrode assembly can be effectively eliminated, so that the finally obtained cast ingots are smooth and consistent in surface and free of partitions, and the quality of the nickel and nickel alloy cast ingots is greatly improved.

Provided in the embodiments of the present application are a battery cell, a battery device, and an electric device. The battery cell comprises a housing, an electrode assembly, an electrolyte, and a positive terminal, wherein the housing comprises a first wall, a second wall, and a side wall; the first wall and the second wall are oppositely arranged on two sides of the side wall and enclose an accommodating cavity with the side wall; the material of the first wall comprises iron, chromium, or nickel; the electrode assembly is arranged in the accommodating cavity; the electrolyte is accommodated in the accommodating cavity and infiltrates at least part of the electrode assembly; the positive terminal is arranged on the first wall, and the positive terminal is electrically connected to the electrode assembly; and the housing is provided with a liquid injection hole extending through the housing. The liquid injection hole is arranged on the first wall, and the minimum distance between the liquid injection hole and the positive terminal is not less than 20 mm; and / or the liquid injection hole is arranged on the second wall or the side wall.

Provided herein, in various embodiments, are methods for making a water-stable electrode by combining a mixture of cellulose nanofibers (CNF) and cellulose nanocrystals (CNC). Also described in embodiments herein are water-stables electrode comprising a mixture of CNF and CNC as a hybrid binder. Also described herein are batteries and devices. Also described herein are methods of protecting an electrode in water from delithiation.

The invention discloses a construction method of a foamed nickel hydrogen evolution electrode with an aerophilic gradient hole array structure. The process of the foamed nickel hydrogen evolution electrode with the aerophilic gradient hole array structure comprises the following steps: 1, electrode pretreatment: firstly, constructing 4 * 4 equidistant gradient holes in the surface of foamed nickel, and then ultrasonically cleaning a foamed nickel electrode substrate by using absolute ethyl alcohol, hydrochloric acid and deionized water in sequence; 2, preparation of a hydrophobic coating solution: firstly taking a proper amount of n-hexane, putting the n-hexane into a beaker, then adding polydimethylsiloxane (PDMS) and a silicone rubber curing agent in proportion, then carrying out ultrasonic oscillation treatment until the solution is fully mixed, then adding hydrophobic gas-phase nano SiO2 particles into the mixed solution, and then carrying out ultrasonic oscillation until the hydrophobic gas-phase nano SiO2 particles are uniformly dispersed; 3, uniformly spraying the dispersed hydrophobic coating slurry into gradient holes of the foamed nickel; and 4, manufacturing a hydrogen evolution electrode by using the foamed nickel subjected to electrodeposition aerophile treatment of a two-electrode system.

The application discloses a cluster type self-healing nickel oxyhydroxide / iron-nickel electrode and application thereof in hydrogen production by cracking of saline water, and steps are as follows: under a three-electrode system, a foam metal is used as a working electrode, a cyclic voltammetry method is adopted in a potassium hydroxide solution electrolyte, and a metal cluster dispersion liquid is obtained; under the three-electrode system, a nickel iron / nickel MOF is used as the working electrode, the metal cluster dispersion liquid is used as the electrolyte, the cyclic voltammetry method is adopted, and a target electrode is obtained; and the target electrode is used in hydrogen production by cracking of saline water or a whole reaction of cracking of saline water in the electrolyte obtained by mixing the metal cluster dispersion liquid and the saline water. The target electrode has higher activity and durability and good self-healing performance under the saline water and industrial large current density (500 mA cm ‑2 ).