7713 results about "Metal salts" patented technology

Vacuum-integrated photoresist-less methods and apparatuses for forming metal hardmasks can provide sub-30 nm patterning resolution. A metal-containing (e.g., metal salt or organometallic compound) film that is sensitive to a patterning agent is deposited on a semiconductor substrate. The metal-containing film is then patterned directly (i.e., without the use of a photoresist) by exposure to the patterning agent in a vacuum ambient to form the metal mask. For example, the metal-containing film is photosensitive and the patterning is conducted using sub-30 nm wavelength optical lithography, such as EUV lithography.

A wildfire defense spraying system installed on property with combustible property surfaces, and adapted for spraying the combustible property surfaces with an environmentally-clean water-based liquid fire inhibitor for defending against wildfire by inhibiting fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense spraying system includes: a storage tank containing a supply of environmentally-clean liquid fire inhibitor comprising an alkali metal salt of a nonpolymeric carboxylic acid, and triethyl citrate (TEC) dissolved in water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and ready for immediate spraying on combustible surfaces. An electric-powered hydraulic pump system is connected to a remote power control switch employed to supply electrical power to the electric-powered hydraulic pump system. A plurality of spray heads are mounted about the property and any buildings thereon, and arranged in fluid communication with the storage tank and the hydraulic pump system. During operation, the hydraulic pump system automatically pumps environmentally-clean water-based liquid fire inhibitor from the storage tank and through the spray heads to generate a spray pattern of environmentally-clean water-based liquid fire inhibitor over all the combustible surfaces on the property. As water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporate to the environment, thin fire-inhibiting alkali metal salt crystalline coatings form on the combustible property surfaces, inhibiting fire ignition and flame spread in the presence of wildfire embers.

A remotely-triggered wildfire defense spraying system installed on property with a building, and adapted for spraying the building and property with an environmentally-clean water-based liquid fire inhibitor for defending against wildfire by inhibiting fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense spraying system includes: a storage tank containing environmentally-clean liquid fire inhibitor comprising an alkali metal salt of a nonpolymeric carboxylic acid, and triethyl citrate (TEC) dissolved in water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and for immediate spraying on property. A fluid pumping loop having a hydraulic pump system is connected to spray heads and the storage tank, and is operably controlled by a remote control switch. When the hydraulic pump system is remotely activated by a remotely generated trigger signal (e.g. from a mobile smartphone or remote wildfire detection system), the hydraulic pump system pumps environmentally-clean water-based liquid fire inhibitor from the storage tank and through the spray heads to produce a spray pattern of environmentally-clean water-based liquid fire inhibitor covering the combustible surfaces on the property. As water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporate to the environment, fire-inhibiting alkali metal salt crystalline coatings form on the sprayed combustible surfaces, inhibiting fire ignition and flame spread in the presence of wildfire embers.

The present invention provides an MOF / cellulose hydrogel, and a preparation method therefor and the use thereof. By defining the composition and sequence of added components, MOF is combined into the matrix of a hydrogel, and self-assembly is performed to generate a reticular nanofiber structure, thereby greatly improving the mechanical strength, the fatigue resistance, the self-repairing property and the biocompatibility of the hydrogel; the cellulose is defined, and in the case that any chemical cross-linking agent is not added, the hydrogel is reinforced and toughened by means of the combined action of modified carboxymethyl cellulose nanofibers with a polyanionic cellulose, a hydrogen bond, and the complexation of a metal and ligand carboxyl group, so as to achieve antibacterial durability; and a coordination compound of metal ions in the metal salt solution is defined, and rigid 1,2,4,5-pyromellitic acid is used as a main ligand and flexible 1,3-bis(1H-imidazol-1-ylmethyl)benzene is used as an auxiliary ligand to perform self-assembly, so as to generate a reticular hyperbranched nanofiber structure, thereby greatly improving the mechanical property and the antibacterial performance of the hydrogel.

An integrated carbon honeycomb structure material and its preparation method are disclosed, belonging to the field of carbon materials technology. Based on a co-sacrificial template low-temperature pyrolysis strategy, the target material can be obtained through three main steps: preparation of a metal salt-colloidal microsphere template precursor, precursor pressing and molding, and subsequent calcination and carbonization. This technology has the characteristics and advantages of simple preparation process, regular and controllable macroscopic structure of the sample (such as shape, area, and thickness), rich and tunable chemical composition, and three-dimensional interconnection of graphene carbon matrix. It has great application potential in many fields such as electrochemical energy storage, catalysis, gas separation, adsorption, and electromagnetic shielding.

A long-term fire retarding biochemical liquid composition including: a dispersing agent realized in the form of a major amount of water, for dispersing alkali metal ions dissolved in the water; a major amount of a first fire retarding agent realized in the form of a primary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, tripotassium citrate, for providing metal potassium ions dispersed in the water when the at least one alkali metal salt is dissolved in the water to form a mixed retardant solution; a minor amount of a second fire retarding agent realized in the form of a secondary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, potassium, sodium, calcium and / or magnesium benzoate, for providing benzoate ions dispersed in the water when the secondary alkali metal salt is dissolved in the mixed retardant solution, for functioning as a secondary fire retardant agent.

The invention discloses a preparation method of a CuZnAlGa hydrotalcite-like derivative catalyst for preparing methanol from synthesis gas rich in carbon dioxide. Cu metal salt, Zn metal salt, Al metal salt and Ga metal salt are used as precursors, Na2CO3 and NaOH are used as precipitants, a mixed alcohol-water solution is used as an auxiliary solvent for coprecipitation, constant temperature and pH value are controlled, and a hydrotalcite-like structure catalyst precursor is obtained. And the precursor is subjected to high-temperature roasting and in-situ reduction in the hydrogen atmosphere, and then the layered framework structure with the Cu nano-particles fixed by the oxide is obtained. The hydrotalcite-like structure plays a role in crystal lattice confinement to prevent Cu particle aggregation, and the interaction between Cu and the oxide improves the adsorption capacity of the surface of the catalyst to CO and CO2, and enhances the activity and stability of methanol prepared from carbon dioxide-rich synthesis gas.

The invention discloses a phosphonic acid-based metal organic framework solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of solid electrolyte materials. The method comprises the following steps: mixing a metal salt, an organic phosphonic acid ligand and an organic solvent, carrying out a coordination reaction, and treating to obtain MOF powder; heating and activating the MOF powder to obtain activated MOF powder; the method comprises the following steps: mechanically grinding lithium salt and MOF powder to form a mixture, heating to enable the molten lithium salt to permeate and fill MOF channels, and cooling to obtain solid electrolyte powder. The ionic conductivity of the solid electrolyte at 30 DEG C reaches 1.01 * 10 <-4 > S cm <-1 >, and the solid electrolyte is kept stable in a 4.4 V high-voltage window. The symmetrical battery based on the phosphonic acid-based MOF solid electrolyte can stably operate, and shows excellent compatibility and stability of the electrolyte and a lithium metal negative electrode. The method has the advantages of simple operation, cheap and easily available components, and is expected to be suitable for large-scale preparation.

The invention discloses a p-methyl benzyl chloride production process and a production system thereof, p-xylene side chains and chlorine are subjected to a gas phase substitution reaction under micro negative pressure and visible light catalysis to generate crude methyl benzyl chloride and hydrogen chloride, and 99.0% methyl benzyl chloride, a small amount of benzyl dichloride and 31% hydrochloric acid are respectively generated through rectification and absorption; the device consists of four working sections of chlorination, rectification, hydrochloric acid absorption and distillation. According to the method, the defects in the prior art are overcome, on one hand, chlorine is introduced, and an aromatic ring chlorination reaction is carried out under visible light catalysis; on one hand, a supported catalyst filler is arranged at the bottom of a chlorination tower, and a zeolite molecular sieve modified by long-chain alkylsilane and supported by metal salt is used as a catalyst to catalyze chloromethylation reaction, on the other hand, the hydrophobicity of the modified catalyst is obviously enhanced, and meanwhile, the density of acidic sites is not reduced; the contact opportunity of the catalyst and a reaction substrate is greatly increased, and the catalytic efficiency of the catalyst is improved.

The invention belongs to the technical field of catalysts, and particularly relates to a supported catalyst as well as a preparation method and application thereof. The preparation method of the supported catalyst provided by the invention comprises the following steps: mixing soluble transition metal salt, a carrier, an alkaline aqueous solution and water, and dipping to obtain a primary catalyst; the soluble transition metal salt comprises transition metal oxalate, transition metal formate or transition metal citrate; and carrying out microwave roasting on the primary catalyst to obtain the supported catalyst. According to the method, the transition metal salt is used as a roasting precursor, the transition metal is subjected to in-situ reduction in the reducing atmosphere generated during thermal decomposition of the transition metal salt in the roasting process, roasting and reduction are completed through microwave roasting one-step heating, the preparation steps are simplified, and meanwhile energy consumption is reduced. The supported catalyst is used in a catalytic condensation coupling hydrogen transfer reaction, has high conversion rate and coupling product selectivity, and can stably operate for a long time.

The invention discloses a preparation method and application of an amorphous nickel-cobalt-iron phosphate anode catalyst, and belongs to the technical field of alkaline water electrolysis hydrogen production, the preparation method comprises the following steps: (1) dissolving transition metal salt in a solvent, and stirring to obtain a metal salt solution; (2) dissolving phosphate in a solvent, and stirring to obtain a phosphate solution; and (3) adding the phosphate solution into the metal salt solution for reaction, washing with deionized water and ethanol, centrifugally separating, and drying to obtain the amorphous nickel-cobalt-iron phosphate anode catalyst. According to the preparation method and application of the amorphous nickel-cobalt-iron phosphate anode catalyst, process safety improvement and environmental friendliness optimization are achieved through an all-water-phase green synthesis system, the obtained catalyst shows excellent performance in an AEM electrolytic cell, the cell voltage is only 1.87 V under the current density of 2 A / cm, and the method has remarkable industrial application prospects.

The invention belongs to the technical field of energy storage materials, and particularly relates to a high-entropy oxide Fe0. 2Co0. 2Ni0. 2Cu0. 2Zn0. 2O and an ultrafast synthesis method and application thereof. According to the preparation method, ferroferric oxide, cobalt oxide, nickel oxide, copper oxide and zinc oxide with equal molar ratio are adopted as direct synthesis raw materials, toxic gases such as chlorine and nitrogen dioxide generated in the synthesis process of a metal salt precursor are avoided, and the uniformly distributed single-phase high-entropy oxide is synthesized in an ultrafast manner within 10 seconds by using a Joule heating technology; the synthesized high-entropy oxide is used as a lithium ion battery negative electrode material, and shows more excellent electrochemical performance and cycling stability compared with other high-entropy oxides prepared from transition metals with different proportions; in the preparation process, extra additives are not needed, operation is easy, the synthesis speed is high, the yield is high, element distribution is uniform, and the method has the advantages of being low in cost, high in efficiency and free of pollution and has the industrialization prospect.

The invention provides a preparation method of a UTSA-16 structure metal organic framework, which comprises the following steps: sequentially adding a metal salt and potassium citrate into an auxiliary solvent, adding an alkaline solution, dissolving, and treating in a ball milling manner to obtain a reaction solution; centrifuging the reaction liquid, collecting a solid part, washing with diethyl ether, soaking with methanol, and drying to obtain a precursor; and activating the precursor at the temperature of 80-90 DEG C, and removing the solvent in the pore channels to obtain the metal organic framework with the UTSA-16 structure. According to the invention, the UTSA-16 is prepared by a solvent-assisted ball milling method, the problems of high energy consumption, long time and serious pollution in the previous preparation process of the UTSA-16 are solved, and the UTSA-16 can be formed under a milder condition and within a shorter time by the method; the reaction is carried out in a ball mill, the maximum synthesis amount can be enlarged along with the scale of the ball mill, the reaction takes 3 hours, heating is not needed, and the method can be put into factories for large-scale production.

The present disclosure is directed to a processing solution composition comprising a metal salt, an acid, a solvent, and a non-metal reductant. The present disclosure is also directed to a method of impregnating a porous material by covering or coating the porous material with a processing solution comprising a metal salt, an acid, a solvent, and a non-metal reductant.

The invention provides anti-ionizing radiation powder with a core-shell heterogeneous gradient structure and a preparation method and application of the anti-ionizing radiation powder, and belongs to the field of radiation protection.The preparation method of the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure comprises the following steps that high-atomic-number metal salt is added into deionized water, aging, washing, drying and primary calcination are conducted in sequence, and the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure is obtained; a core layer is obtained; the core layer and low-atomic-number metal salt are added into deionized water, aging, washing, drying and primary calcination are sequentially conducted, and preliminary wrapping powder with the high-atomic-number metal core layer wrapped by low-atomic-number metal is obtained; and adding the preliminarily wrapped powder and rare earth salt into deionized water, and sequentially performing aging, washing, drying, primary calcining, secondary calcining, airflow crushing and air rotation purging to obtain the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure. Through cooperation of the core-shell heterostructure, the high-atomic-number oxide, the low-atomic-number oxide and the multi-element rare earth element, the shielding performance of the material is remarkably improved.

The invention belongs to the field of photocatalytic materials, and particularly relates to a high-entropy sulfide and a preparation method and application thereof. The high-entropy sulfide is granular, the molecular general formula is (MnaFebCocCudZe) xS, x is equal to 1, and the atomic ratio of Mn to Fe to Co to Cu to Zn is a: b: c: d: e of (1-2): (1-2): (1-2): (1-2): (1-2): (1-2): (1-2). The preparation method comprises the following steps: S1, dissolving metal salt in a mixed solvent of isopropanol and glycerol according to the atomic ratio of metal elements, and carrying out solvothermal reaction to obtain a precursor; and S2, dispersing the precursor in ethanol, adding thioacetamide as a sulfur source, and carrying out solvothermal reaction to obtain the high-entropy sulfide. The high-entropy sulfide disclosed by the invention is used as a photocatalytic material and shows excellent photocatalytic performance.

The invention discloses a double self-repairing polyurethane coating containing a metal coordination bond and a Diels-Alder bond. The double self-repairing polyurethane coating is prepared from the following raw materials: polyol, an isocyanate derivative, a chain extender containing the metal coordination bond, metal salt and a binary chain extender containing the Diels-Alder bond. According to the double self-repairing polyurethane coating containing the metal coordination bond and the Diels-Alder bond, the repairing efficiency and the mechanical and chemical resistance can be improved.

The invention discloses a modified resin coated double-doped microcrystalline graphite negative electrode material as well as a preparation method and application thereof. The modified resin coated double-doped microcrystalline graphite negative electrode material has a core-shell structure, wherein an inner core is a three-dimensional network porous structure formed by metal salt and sulfur double-doped microcrystalline graphite; metal salt in the inner core forms a chemical bond between sulfur and microcrystalline graphite to provide a bridge for bonding of microcrystalline graphite and sodium; the shell is a coating layer formed by coating the surface of the inner core with modified resin and carbonizing the modified resin, and has a three-dimensional porous conductive network structure. According to the invention, through the activation process, increase of interlamellar spacing and active sites of microcrystalline graphite, and double doping of sulfur element and metal salt, the doping amount of sulfur and metal salt in microcrystalline graphite is improved, meanwhile, the metal salt forms chemical bonds between sulfur and microcrystalline graphite, sodium ion loss in the charge and discharge process is reduced, and the material stability is improved; and the rate cycle performance of the sodium ion battery is improved.

The invention discloses a high-entropy nanoparticle catalytic material with a metal atom shell structure and a preparation method of the high-entropy nanoparticle catalytic material, and belongs to the technical field of preparation of catalytic materials. The preparation method comprises the following steps: dispersing a metal salt and a nanofiber precursor in an organic solvent, and carrying out electrostatic spinning to obtain a nanofiber membrane; and then calcining and pre-oxidizing the nanofiber membrane, and then carbonizing and calcining to obtain the nanofiber membrane. Wherein the selection principle of the metal salt is as follows: (n-1)-(n-2) metals are selected as an alloy substrate, and the sum of the mixing enthalpy of elements of the alloy substrate is not greater than-5kJ mol <-1 >; one or two metal elements serve as a precipitated phase, and the sum of the mixing enthalpy of the metal elements of the precipitated phase and the elements of the alloy substrate is larger than 20 kJ mol <-1 >; the high-entropy nanoparticle catalytic material obtained by the method shows relatively high catalytic activity and stability, and the method has wide universality.

The invention discloses a deep eutectic gel electrolyte as well as a preparation method and application thereof, and belongs to the field of battery materials. The deep eutectic gel electrolyte is prepared from the polymerizable deep eutectic solvent and an initiator. Wherein the polymerizable deep eutectic solvent is obtained by mixing and heating the following independently stored components: a hydrogen bond donor and a hydrogen bond acceptor, wherein the hydrogen bond acceptor is a metal salt; the hydrogen bond donor is butanedinitrile and a polymerizable monomer. The preparation method of the deep eutectic gel electrolyte comprises the following steps: mixing the raw materials under a certain temperature condition, fully stirring to obtain a gel electrolyte precursor solution, and initiating polymerization under an illumination condition to obtain the deep eutectic gel electrolyte. The gel electrolyte prepared by the method has relatively high ionic conductivity and a relatively wide electrochemical stability window, and the cycle life of a symmetric battery and a total battery assembled by the deep eutectic gel electrolyte is obviously prolonged. Meanwhile, the quasi-solid-state sodium-ion battery and the lithium-ion battery prepared by the method are simple in technological process, and commercial production is easy to realize.

The invention discloses a bimetallic composite catalyst of copper and rare earth, a preparation method of the bimetallic composite catalyst and application of the bimetallic composite catalyst in electrochemical reduction of carbon dioxide. The preparation method of the bimetallic composite catalyst comprises the following steps: mixing copper salt and rare earth metal salt in water, adding ammonium carbonate and inorganic alkali into the mixture, stirring and reacting, and centrifuging, washing and drying the mixed solution to obtain a catalyst precursor; calcining the catalyst precursor to obtain the bimetallic composite catalyst, the Cu and rare earth bimetallic compound catalyst has the advantages of high current density, high selectivity, good system stability and long service life when being used for electrically reducing CO2. The catalyst has rich active sites, has a large surface area, can be fully contacted with an electrolyte and CO2, and can overcome the limitation of substance transfer. Selective output of methane or multi-carbon products is efficiently achieved by regulating and controlling the molar ratio of copper to rare earth elements, the partial current density of methane and the multi-carbon products reaches the industrialization level, and the catalytic effect is excellent.

The invention discloses a metal-doped carbon quantum dot as well as preparation and application of the metal-doped carbon quantum dot in a nano antibacterial agent, citric acid, urea and tea polyphenol are taken as precursors, metal salt is added, carbon dot synthesis and metal ion doping are synchronously completed in one step through a hydrothermal method, and the metal-doped carbon quantum dot is prepared; the surfaces of the metal-doped carbon quantum dots are negatively charged, and the metal-doped carbon quantum dots have peroxidase-like activity and catalase-like activity at the same time; the metal ions adopt any one of Fe < 3 + >, Cu < 2 + > and Ce < 3 + >; the metal-doped carbon quantum dots are in a sphere-like shape. The metal-doped carbon quantum dots prepared by the preparation method disclosed by the invention have peroxidase-like activity and catalase-like activity at the same time through precise doping of metal ions, and the two activities have a synergistic effect in an oral periodontitis microenvironment, so that a good antibacterial effect is achieved.

The invention belongs to the field of sludge treatment, and discloses a method for improving the dewatering performance of sludge through composite pretreatment, which comprises the following steps: (1) adding high-valence metal salt or high-valence metal salt polymer into water-containing sludge to be dewatered, mixing and stirring to stabilize the pH value of the system at 3-5; (2) adding transition metal salt into the system and stirring; the use amount of the transition metal salt is 2-15% of the weight of the dry basis of the sludge; (3) adding an oxidizing agent into the system, stirring, and carrying out filter pressing and dehydration to obtain a dehydrated mud cake; the using amount of the oxidizing agent is 2-30% of the weight of the dry basis of the sludge. According to the method, the flow design of the treatment method is improved, the pH value of the sludge is reduced by using the high-valence metal salt, then the sludge is conditioned by using the transition metal salt and the oxidizing agent, and meanwhile, the dosage of the oxidizing agent is controlled, so that the problems of too high cost and excessive oxidation caused by separate Fenton oxidation conditioning or ultrasonic-acidification-Fenton combined conditioning can be solved.

Articles for reducing the risk of infection, bearing, or containing an antimicrobial composition containing a solid-phase peroxyxcarboxylic acid metal salt are provided. Methods of reducing the risk of infection using the antimicrobial composition are also provided.

The invention relates to the technical field of flocculants, in particular to a composite flocculant containing a cationic etherifying agent and a preparation method of the composite flocculant, and the composite flocculant is prepared from the following raw materials in parts by weight: 15-20 parts of carboxymethyl guar gum, 12-15 parts of cationic konjac glucomannan, 1.2-1.5 parts of the cationic etherifying agent, 1.8-2.2 parts of a magnetic polysilicate metal salt flocculant and 0.2-0.3 part of a preservative. According to the present invention, by compounding the flocculant, the flocculated floc has magnetism and can be recovered and repeatedly utilized, and the photoresponse azobenzene structure is grafted in the cationic konjac glucomannan, such that the controllable pollutant aggregation and separation can be achieved, and the good flocculation performance can be maintained after the composite flocculant is repeatedly recovered and repeatedly utilized.

The invention relates to the field of energy storage battery materials, in particular to a high-entropy alloy coated single crystal nickel-rich cobalt-free positive electrode material and a preparation method thereof.The preparation method comprises the following steps that S1, nano nickel oxide, nano manganese oxide and LiOH.H2O are ground and mixed to be uniform, and mixed powder is obtained; s2, uniformly stirring and mixing the mixed powder and the high-entropy alloy precursor solution, performing vacuum drying, and performing first-stage sintering in an oxygen atmosphere; the high-entropy alloy precursor solution is a metal salt solution containing aluminum, titanium, molybdenum, manganese and nickel metal ions; and S3, carrying out second-stage sintering, naturally cooling to room temperature, and grinding to obtain the high-entropy alloy coated single-crystal nickel-rich cobalt-free positive electrode material. The preparation process of the high-entropy alloy coated single crystal nickel-rich cobalt-free positive electrode material is simple, the high-entropy alloy coated layer can improve the conductivity, the power and the energy density performance, the growth of primary particles can be promoted by two-stage calcination, the rate capability is excellent, and the cycle performance is stable.

The invention provides a polyanionic precursor, a sodium-ion battery positive electrode material, a preparation method of the sodium-ion battery positive electrode material, a sodium-ion battery and electric equipment, and relates to the field of sodium-ion batteries. The polyanionic precursor contains a substance of which the chemical general formula is NaqMm + nM'wPxOy.zH2O. The preparation method of the polyanionic precursor comprises the following steps: mixing a metal salt containing M < 2 + > and a first phosphorus source containing pyrophosphate to obtain a mixed solution, and reacting to obtain a mixed solution of pyrophosphate containing divalent metal M; and adding an oxidizing agent and a second phosphorus source for reaction, carrying out solid-liquid separation, and drying the separated solid to obtain the polyanionic precursor. The polyanionic precursor is high in tap density, and the prepared sodium ion battery positive electrode material is high in purity and excellent in electrochemical performance. The polyanionic precursor provided by the invention contains a small amount of insoluble Na, so that a sodium source can be saved when a positive electrode material is prepared.

The invention discloses a preparation method and application of a novel protonated layered iridium oxide H-IrO2 nanosheet, the iridium oxide nanosheet has a typical layered structure, a large number of protons are accommodated between layers of the layered structure, and the surface of the layered structure has the characteristics of rich metal iridium vacancy defects and local disorder. The preparation method comprises the following steps: 1) performing alkaline hydrolysis on iridium metal salt to obtain an amorphous iridium oxide precursor; 2) performing Joule heating treatment to obtain a layered iridium oxide nanosheet structure, and 3) performing acid proton exchange to obtain the protonated layered iridium oxide nanosheet. The novel layered structure shows high activity and excellent stability in catalysis of an acidic electrolyzed water anode oxygen evolution reaction, and due to the unique structure and excellent performance of the novel layered structure, the novel layered structure is expected to replace an existing commercial catalyst and plays a key role in a large-scale water electrolysis process.

The invention provides a NiCo double hydroxide self-supporting nano-catalyst as well as a preparation method and application thereof, and belongs to the field of nano composite materials. The preparation method of the NiCo double hydroxide self-supporting nano-catalyst is characterized by comprising the following steps: firstly, adding cobalt salt and nickel salt into a solvent, performing ultrasonic treatment to completely dissolve the two metal salts to obtain a metal salt solution, and then assembling a working electrode, a counter electrode and a reference electrode in the metal salt solution to obtain a three-electrode device, and finally, adjusting corresponding parameters in an electrochemical workstation, and carrying out a self-supporting deposition experiment of Ni and Co double-metal hydroxides on the three-electrode device in the electrochemical workstation to obtain the NiCo double-metal hydroxide self-supporting nano-catalyst material with a typical scaly structure and excellent performance. According to the preparation method of the NiCo double-metal hydroxide self-supporting nano-catalyst material, product treatment is convenient and fast, and the process is simple.

The invention provides a metal particle loaded self-supporting electrode material and a preparation method and application thereof, and belongs to the technical field of battery electrodes, the preparation method comprises the following steps: S1, cutting beech into pieces with the thickness of 5-7mm along the vertical growth direction, and calcining to obtain carbonized wood pieces; s2, metal salt is dissolved in the functionalized aqueous solution, the concentration of the metal salt is 0.03-0.05 M, and a soaking solution is obtained; the functionalized aqueous solution comprises dodecyl trimethyl ammonium chloride, sodium pyrophosphate, polyvinylpyrrolidone and water; s3, taking the carbonized wood chip as a working electrode, immersing the carbonized wood chip into the soaking solution, carrying out electro-deposition on a metal precursor, and then cleaning and drying to obtain a metal-loaded wood chip; and S4, pyrolyzing the metal-loaded wood chip in a hydrogen-argon mixed atmosphere, then cooling to room temperature, cleaning and drying to obtain the metal-loaded wood chip. According to the invention, the transition metal particles and the carbonized wood chips are better compounded, and more reliable active sites are provided for bromine electrochemical reaction, so that the overall performance of the zinc-bromine battery is improved.