35 results about "Sodium hypophosphite" patented technology

The invention relates to the technical field of new energy chemical catalysis, in particular to a catalyst for preparing formaldehyde through photo-thermal catalysis of methane under gas-solid continuous flow as well as a preparation method and application of the catalyst. The preparation method comprises the following steps: S1, preparing a pretreatment carrier; s2, preparing a precursor solution: S201, adding a palladium chloride solution into the zinc oxide suspension, stirring at room temperature, carrying out vacuum suction filtration, washing and drying to obtain a Pd / ZnO precursor; s202, dispersing the Pd / ZnO precursor in deionized water, adding rare earth metal salt, dropwise adding triethylene tetramine, stirring, and adding sodium hypophosphite to obtain a precursor solution; s3, preparing a composite precursor; and S4, carrying out post-treatment. The invention provides a catalyst for preparing formaldehyde through photo-thermal catalysis of methane under gas-solid continuous flow as well as a preparation method and application of the catalyst, and aims at solving the problems that in related technologies, the activation difficulty of methane C-H bonds is high, formaldehyde is prone to deep oxidation, and the operation efficiency of the catalyst in a gas-solid continuous flow system is low.

The invention discloses an iron-doped nickel-cobalt metaphosphate electrode material based on an oxide intermediate and a preparation method and application thereof, and relates to the technical field of supercapacitors, the preparation method comprises the following steps: preparing an electrolyte containing a nickel salt, a cobalt salt and an iron salt, and carrying out electro-deposition on a conductive substrate to obtain the iron-doped nickel-cobalt metaphosphate electrode material. A nickel-cobalt-iron layered double hydroxide precursor is obtained; sintering the nickel-cobalt-iron layered double hydroxide precursor to prepare an intermediate; and phosphating the intermediate by taking sodium hypophosphite as a phosphorus source to finish the preparation. The invention also discloses the iron-doped nickel-cobalt metaphosphate electrode material based on the oxide intermediate prepared by the method and an application of the iron-doped nickel-cobalt metaphosphate electrode material in preparation of a supercapacitor. Through a unique pre-oxidation process and substrate optimization, the electrochemical performance of the electrode material is remarkably improved, and the problems that an existing metaphosphate material is poor in conductivity and insufficient in active site are solved.

The invention relates to the field of chemical plating, in particular to a high-phosphorus chemical nickel-phosphorus plating process and a super-corrosion-resistant and wear-resistant valve prepared through the high-phosphorus chemical nickel-phosphorus plating process. The process comprises the following steps that 1, a workpiece is polished, and the polished workpiece is obtained; 2, the polished workpiece is pretreated, and the pretreated workpiece is obtained; 3, a plating solution for high-phosphorus chemical nickel-phosphorus plating is prepared; 4, the pretreated workpiece is immersed in a high-phosphorus chemical nickel-phosphorus plating solution, and chemical plating is completed on the surface of the workpiece; and 5, sequentially carrying out post-treatment and heat treatment on the product obtained in the step 4 to obtain a finished product. Wherein a plating solution for high-phosphorus chemical nickel-phosphorus plating is a water-in-oil emulsion; the composition comprises a water phase and an oil phase; the water phase contains nickel salt, sodium hypophosphite and at least one organic acid; the oil phase comprises kerosene, isoparaffin or synthetic ester.

This invention discloses a method for low-resistivity thin-film deposition, comprising the following steps: Step 1, the ceramic substrate is first pickled with 2% hydrochloric acid for 1-2 hours. After pickling, it undergoes initial treatment and activation to obtain an activated ceramic substrate; Step 2, preparation of the nickel plating solution: 7-12 g / L nickel sulfate, 15 g / L sodium tungstate, 31.5 g / L sodium hypophosphite, 35 g / L sodium citrate, 2 ml / L ammonia, and 5 g / L thiourea are stirred and mixed thoroughly to obtain the nickel plating solution. This invention enhances the contact effect between the activation solution and the substrate through the synergistic effect of the raw materials, thereby improving the performance of the product. Simultaneously, tungsten metal in the electroplating process possesses characteristics such as high temperature resistance, corrosion resistance, low temperature coefficient of resistance (TCR), and good thermal stability. Furthermore, the synergistic effect of the raw materials significantly improves the product's performance.

The application relates to a tungsten alloy material wire cutting technical field, in particular to a preparation method of a high-strength tungsten wire composite material for cutting. The preparation method of the high-strength tungsten wire composite material for cutting comprises the following steps: preparing a base tungsten wire, preparing surface plated diamond, preparing modified plated diamond and preparing the high-strength tungsten wire composite material. In the application, the diamond micro powder is pretreated and activated, then is added into a plating solution of nickel sulfate, sodium molybdate and sodium hypophosphite dihydrogen, and is chemically plated to prepare a Ni-Mo-P plating layer on the surface of the diamond, and after the surface plated diamond is obtained, when the diamond is embedded into the base tungsten wire, a mechanical interlocking structure can be formed between the diamond and the base tungsten wire to resist the shearing stress during cutting, therefore, the preparation of the Ni-Mo-P plating layer on the surface of the diamond can effectively improve the bonding force between the diamond and the base tungsten wire and reduce the falling amount of the diamond during cutting.

The invention relates to the technical field of copper powder preparation, and provides a preparation method of liquid-phase in-situ self-assembly nano-shell-coated micron-core composite copper powder, a specific inducer is introduced into a liquid-phase reduction system, copper sulfate is adopted as a copper salt, and sodium hypophosphite or VC is adopted as a reducing agent, so that one-time forming of a micron-core-nano-shell composite structure is realized; the problems of non-uniform particle size distribution, high energy consumption, low yield and the like in a traditional copper powder preparation method are effectively solved; according to the prepared composite copper powder, the low-temperature sintering driving force brought by the nanometer shell layer is obtained while the process-friendly characteristics of being easy to filter, easy to wash, easy to dry and the like of micron powder are reserved, the initial sintering temperature can be reduced to about 150 DEG C, and the machining performance of the copper powder under the low-temperature condition is remarkably improved.

The application discloses a cobalt-phosphorus-cobalt oxide composite electrode material and application thereof as an anode of a direct borohydride fuel cell. First, a conductive substrate is placed in an aqueous solution containing a cobalt source, ammonium fluoride and urea to perform a hydrothermal reaction; after being reduced to room temperature, the conductive substrate is repeatedly cleaned with deionized water, and then is placed in a solution containing sodium hypophosphite to perform immersion; finally, the conductive substrate is calcined at high temperature in a vacuum environment to obtain the cobalt-phosphorus-cobalt oxide loaded on the conductive substrate in situ. The electrode material preparation method provided by the application converts the original contact between a carrier gas and an electrode surface in a phosphorization process into the in-situ adhesion of a phosphorus solution on the electrode surface, realizes a uniform phosphorization process, is low in cost and easy to be industrialized, and the material can be used as an anode material of the direct borohydride fuel cell.

The invention relates to the technical field of electronic equipment protection structures, in particular to a lightweight foamed aluminum-based integrated structural part for an electronic equipment case. The lightweight foamed aluminum-based integrated structural part comprises a gradient foamed aluminum matrix, a bionic ventilation channel and a surface conducting layer. The silicon dioxide coating layer in the modified foaming agent can isolate water vapor to reduce the moisture absorption rate, and the coating layer is gradually decomposed at high temperature, so that the initial decomposition temperature of titanium hydride is increased, the gas production time is prolonged, and pore collapse caused by concentrated gas production is avoided; interface bonding among the modified binder, the reinforced phase and the aluminum powder is converted into chemical bonding from physical adsorption, so that the bonding force of the interface is stronger, and local fracture caused by stress concentration is avoided; a polyvinyl alcohol coating layer of microencapsulated sodium borohydride in the modified reducing agent isolates direct contact with a plating solution, so that the hydrolysis rate is reduced, the effective effect is prolonged, and doped sodium hypophosphite fills lattice defects through rare earth ions, so that the fluctuation range of the reduction rate is reduced.

The application discloses a kind of vanadium doped nickel phosphide material of spherical micrometer flower structure and its preparation method and application, belong to electrolytic water hydrogen production material technical field.Method includes the following steps: (1) foam nickel is ultrasonically cleaned, dry;(2) deionized water, isopropanol, urea, NH4F, VCl3, Ni (NO3) 2·6H2O and the foam nickel treated in step (1) are placed in reaction vessel, heated reaction using hydrothermal method, obtain nickel vanadium oxide grown on foam nickel matrix;(3) nickel vanadium oxide obtained in step (2) and sodium hypophosphite are respectively loaded into porcelain boat, calcine in inert gas atmosphere, obtain vanadium doped nickel phosphide material of spherical micrometer flower structure.Afficient: the vanadium doped nickel phosphide material prepared in the application, according to electrochemical test results, vanadium doped nickel phosphide electrode of spherical micrometer flower structure shows excellent electrocatalytic performance, when current density is 10mA·cm ‑2 , overpotential is only 85mV;It has broad application prospect.

The invention relates to the technical field of high-performance copper material surface treatment, in particular to a stranding machine copper induction rod and a preparation method thereof.The stranding machine copper induction rod comprises a copper core body and a tin coating formed on the outer surface layer of the copper core body, and the tin coating is formed by electroplating of a methyl sulfonate tin plating solution. The tin plating solution comprises main salt, conductive acid and a composite additive composed of a stress relieving agent, a stabilizer and a surfactant. Wherein the stress relieving agent is a cobalt-nickel-molybdenum ternary metal composite additive, the stabilizer is a synergistic system of sodium hypophosphite and acrylamide, through a unique plating solution formula and process, a compact and uniform tin plating protective layer with high binding force and good toughness is formed on the surface of a copper bar, contact between a copper matrix and air is effectively isolated, and the corrosion resistance of the copper bar is improved. The problem of inductance detection function failure caused by copper oxidation is thoroughly solved, the service life and the detection reliability of the induction bar are remarkably improved, and the induction bar has industrial popularization and application value.

The invention discloses a non-magnetic chemical nickel plating solution and a deposition process, and relates to the technical field of metal surface plating treatment. A non-magnetic chemical nickel plating solution comprises water-soluble nickel salt, a reducing agent, a composite complexing agent, a stabilizing agent, a buffering agent, a brightening agent and the balance water, the water-soluble nickel salt is selected from at least one of nickel sulfate, nickel acetate and nickel aminosulfonate, and the reducing agent comprises sodium hypophosphite. The composite complexing agent comprises at least one of lactic acid, citric acid, glycine and aspartic acid. According to the technical scheme, iron, cobalt and other magnetic metal impurity ions are not directly introduced into the plating solution, nickel ions and phosphorus ions in the plating solution can be stably deposited, and the hardness and thickness uniformity of a plating layer can be improved while non-magnetic chemical nickel plating is achieved.

This invention relates to a bifunctional electrocatalytic self-supporting electrode based on filter paper and its preparation method, belonging to the field of electrocatalysis technology. The preparation method consists of the following steps: (1) weighing nickel sulfate and cobalt sulfate and dissolving them in deionized water; (2) dissolving sodium citrate and sodium hypophosphite in deionized water respectively, and then adding them sequentially to the solution obtained in step (1); (3) adjusting the pH of the solution obtained in step (2); (4) cutting the filter paper; (5) preparing a sodium hydroxide solution; (6) placing the cut filter paper in a water bath in the solution prepared in step (5); (7) weighing palladium chloride and sodium borohydride and dissolving them in deionized water at room temperature; (8) activating and then reducing the filter paper in step (6); (9) placing the filter paper obtained in step (8) in a water bath in the solution obtained in step (3) and drying it. This invention reduces overpotential, decreases relative energy consumption, increases catalytic activity, and improves catalyst stability.

This invention discloses a method for preparing a cobalt-based composite metal material and its application in electrocatalytic urea oxidation. The method involves a hydrothermal reaction of zinc acetate, cobalt acetate, hexadecyltrimethylammonium bromide, and 2-methylimidazole to obtain a ZnCo-ZIF precursor. The ZnCo-ZIF precursor is then dissolved in methanol with ferrous chloride and stirred for a certain period. After centrifugation, washing, and drying, FeZnCo-OH material is obtained. Finally, FeZnCo-OH material and sodium hypophosphite are placed separately in a tube furnace, nitrogen gas is introduced, and the reaction is heated. After cooling to room temperature, P-Fe2O3 / ZnCo2O4 material is obtained. Based on this, the cobalt-based composite metal material can be applied to electrocatalytic urea oxidation in 1.0 M KOH and 0.33 M urea solutions with a current density of 10 mA cm⁻¹. ‑2 The potential at which it is applied is 1.3353V, and it exhibits excellent catalytic activity for urea oxidation.

The invention relates to the technical field of alloys, in particular to a magnesium alloy high-phosphorus chemical nickel plating process. The process sequentially comprises the steps of alkaline oil removal, first-stage activation, calcium ion bridging, zirconium ion curing and chemical nickel plating. Wherein the first-stage activating solution contains diammonium hydrogen phosphate, sodium fluoride and a directional hydrophobic HEDP (1-hydroxyethylidene-1, 1-diphosphonic acid) derivative; the chemical nickel plating solution contains nickel sulfate, lactic acid, succinic acid, sodium hypophosphite, sodium fluoride, thiourea and cerous nitrate. Through cooperation of multi-section interface treatment and plating solution components, magnesium alloy activation over-corrosion is effectively inhibited, the binding force and corrosion resistance of a high-phosphorus plating layer are remarkably improved, the technical problem that a plating layer in a chromium-free process is prone to blistering and stripping is solved, and the method is suitable for protection of high-reliability magnesium alloy parts.

A method of preparing a metallic nickel / nickel-iron hydroxide catalytic layer-modified copper iodide-bismuth composite electrode is disclosed. The method comprises steps of: preparing a plating solution containing 0.25 M ammonium chloride, 0.067 M to 0.133 M nickel chloride, 0.067 M to 0.133 M ferrous sulfate, and 0.04 M to 2 M sodium hypophosphite; placing a copper iodide-bismuth composite electrode in the plating solution for electrodepositing metallic nickel / nickel-iron hydroxide catalytic layer onto the copper iodide-bismuth composite electrode to obtain the metallic nickel / nickel-iron hydroxide catalytic layer-modified copper iodide-bismuth composite electrode, CuI—Bi / Ni—NiFe(OH)x(r), wherein r is a molar ratio of nickel chloride to ferrous sulfate. A metallic nickel / nickel-iron hydroxide catalytic layer modified copper iodide-bismuth composite electrode and a method of preparing adiponitrile using the metallic nickel / nickel-iron hydroxide catalytic layer modified copper iodide-bismuth composite electrode are further disclosed.

The invention belongs to the technical field of hydrogen evolution electrodes, and discloses a hydrogen evolution electrode material with high catalytic activity and a preparation method and application thereof, and the preparation method comprises the following steps: step 1, cleaning foamed nickel; step 2, preparing a tungsten-iron-chromium co-doped hydroxyl cobalt fluoride / foamed nickel precursor WFeCrCo (OH) F / NF on the foamed nickel through a hydrothermal method; 3, the WFeCrCo (OH) F / NF obtained in the step 2 and sodium hypophosphite powder are placed at two different positions of a ceramic boat respectively, the sodium hypophosphite powder is located on the upstream side of a tubular furnace, heat preservation is conducted in a protective gas environment, then the temperature is naturally cooled to the room temperature, and the tungsten-iron-chromium co-doped cobalt phosphide composite electrode material WFeCr-CoP / NF is obtained. Through synergistic doping of three elements of tungsten, iron and chromium, the catalytic activity of the nickel-based hydrogen evolution electrode material is improved.

This invention provides a composite iron phosphate, its preparation method, and its application. The preparation method includes the following steps: (1) mixing an iron salt solution and hydrochloric acid, heating and stirring, adding phosphate, adjusting the pH to obtain a mixed solution, mixing the mixed solution with hydrogen peroxide, and then performing a hydrothermal reaction to obtain a mixture of iron phosphate and iron hydroxide; (2) placing the mixture of iron phosphate and iron hydroxide and sodium hypophosphite in different regions of the same device, and heating the device to obtain the composite iron phosphate. This invention prepares a composite iron phosphate uniformly doped with iron phosphate through a simple hydrothermal method. The lithium iron phosphate cathode material made from the composite iron phosphate has high ionic conductivity, and thus exhibits high cycle stability and rate capacity.

The application discloses a nickel-cobalt phosphide catalytic electrode which can be used for glycerol oxidation and a preparation method and application thereof, and belongs to the technical field of electrocatalysis. The preparation method comprises the following steps: S1, adding nickel salt, cobalt salt, ammonium fluoride and urea into water and stirring until they are uniformly mixed, and then performing a hydrothermal reaction on the mixture with a foamed nickel substrate to obtain a nickel-cobalt bimetallic hydroxide precursor loaded on the foamed nickel; and S2, placing the nickel-cobalt bimetallic hydroxide precursor loaded on the foamed nickel and sodium hypophosphite in an inert atmosphere and performing a low-temperature phosphorization treatment, and thus the nickel-cobalt phosphide catalytic electrode is obtained. The preparation method is low in cost and easy to operate, and the prepared nickel-cobalt phosphide catalytic electrode can be used as a bifunctional catalyst and has excellent HER and GOR catalytic activities, so that glycerol assisted hydrogen production can be realized at a low voltage, and the effective combination of energy conversion and high-value chemical production is realized.

The application discloses a preparation method of a cerium hydroxide / nickel phosphide heterostructure catalyst for seawater electrolysis, and belongs to the technical fields of catalysts and batteries. Foam nickel is soaked in an aqueous solution containing nickel nitrate, urea and ammonium fluoride to perform a hydrothermal reaction, the foam nickel after the hydrothermal reaction is washed, dried, and Ni(OH)2 is obtained; a phosphorus source and the Ni(OH)2 are subjected to a phosphorization reaction under an inert atmosphere to obtain Ni2P nanometer arrays; the phosphorus source is sodium hypophosphite; cerium nitrate is added to distilled water, stirred and dissolved at normal temperature to obtain an A solution; the Ni2P nanometer arrays are used as a working electrode, soaked in the A solution to perform an electrodeposition reaction, the reaction product is washed with deionized water, dried, and a cerium hydroxide / nickel phosphide nanometer array heterostructure oxygen evolution electrode material for seawater electrolysis is obtained. The application promotes the rearrangement of an electronic structure at a heterojunction, optimizes adsorption energy of an intermediate, and thus improves the water electrolysis catalytic efficiency, has a short preparation cycle, good controllability, and good stability in seawater.

The invention discloses a foamed nickel-based heterostructure electro-catalytic material, which is characterized in that thiourea, cobaltous sulfate, sodium hypophosphite and ammonium fluoride are used as reaction raw materials, and the nickel-based electro-catalytic material with a heterostructure is prepared on a foamed nickel substrate through a two-step hydrothermal method; the invention further discloses a preparation method of the foamed nickel-based heterostructure electro-catalytic material and application of the electro-catalytic material. The electrocatalytic material prepared by the two-step hydrothermal method provided by the invention effectively improves the selectivity problem of the foamed nickel-based heterostructure electrocatalytic material in the electrochemical oxidation process of 5-HMF, and realizes higher conversion efficiency, product yield and Faraday efficiency at lower reaction potential.

The application discloses a foam nickel loaded bimetallic phosphide / sulfide heterostructure hydrogen evolution catalyst and a preparation method thereof. Different from a preparation method of a general high-temperature phosphorization or sulfuration treatment corresponding precursor, the application adopts a mild and simple two-step electrodeposition method, taking nickel salt and cobalt salt as metal sources, taking thiourea as a sulfur source, and taking sodium hypophosphite as a phosphorus source. First, foam nickel with good conductivity is selected as a substrate, and nickel cobalt sulfide nanosheet arrays are directly grown on the foam nickel through cyclic voltammetry electrodeposition; then, nickel cobalt phosphorus nanoparticles are in-situ coated on the surface of the nickel cobalt sulfide nanosheet to obtain an electrocatalytic hydrogen evolution catalyst with a layered heterostructure. The catalyst prepared by the method has low cost, and also exhibits excellent alkaline electrocatalytic hydrogen evolution performance under a large current density, and has great potential in actual large-scale hydrogen production.

This invention discloses a high-phosphorus amorphous electroless nickel plating process and solution, relating to the field of electroless nickel plating technology. It primarily addresses the technical problem of simultaneously achieving stability of the plating solution and corrosion resistance of the coating in existing technologies. The plating solution uses nickel sulfate as the main salt and sodium hypophosphite as the reducing agent, combined with a complexing system of ternary organic acids, and an environmentally friendly composite stabilizer composed of organic components and rare earth cerium or lanthanum salts. The pH of the plating solution is controlled by a pH adjuster. Before plating, the plating solution undergoes precise continuous filtration, and the substrate is pre-immersed in dilute lactic acid. The plating process employs a combination of air agitation and workpiece movement, along with optimized substrate pretreatment and plating procedures. This invention enables long-term stable operation of the plating solution without the need for heavy metal stabilizers, and can controllably produce amorphous nickel-phosphorus alloy coatings with high corrosion resistance and strong adhesion. It can be widely applied to surface protective coating treatment of various metal substrates.

The invention discloses a gold-based anti-corrosion high-adhesion coating and a preparation method thereof. The preparation method comprises the following steps: performing ultrasonic oil removal and plasma surface activation treatment on a gold base material; the pretreated gold base material is put into a chemical plating solution, and a chemical plating bottom layer is formed through deposition; putting the gold base material subjected to chemical plating into electrophoretic paint, and forming an electrophoretic layer on the surface of the chemical plating bottom layer through an electrophoretic process; the chemical plating solution comprises nickel sulfate, sodium hypophosphite, nano cerium oxide and a complexing agent; the electrophoretic paint is prepared from the following components in parts by weight: 40 to 45 parts of acrylic resin, 0.5 to 1.5 parts of polyaniline modified graphene, 1 to 3 parts of organic silicon modified perfluoropolyether, 0.2 to 0.4 part of polyether modified fluorosilicone oil flatting agent and 10 to 15 parts of blocked isocyanate curing agent, the obtained coating is high in adhesive force with a base material and has excellent corrosion resistance.

This invention belongs to the field of composite fiber material preparation technology, and relates to a process for preparing a nickel-phosphorus alloy coating on the surface of alumina fibers. The steps include dispersion, activation, and preparation of a plating solution. The main salt in the plating solution is any one of nickel sulfate, nickel chloride, or nickel acetate, with a concentration of 5-60 g / L. The reducing agent is sodium hypophosphite solution, and the pH of the plating solution is 11. Plating is then performed by placing the activated fibers in the plating solution, stirring slowly, and heating in a water bath at 50-80°C until the plating solution becomes clear. After plating, the fibers are removed and allowed to air dry naturally to obtain the product. This invention achieves the plating of a nickel-phosphorus alloy coating on the surface of alumina through chemical liquid phase deposition. The process is simple and low-cost. The prepared product exhibits excellent performance and stable quality.

The invention discloses humidity response type antibacterial and mildew-proof leather and a preparation method thereof. The method comprises the following steps: firstly, dissolving silver nitrate and quercetin to obtain QC-Ag nanoparticles; secondly, preparing polydopamine nano particles; then copper acetate is dispersed in an ethanol solution, PDA nano-particles are added, ultrasonic stirring and standing precipitation are carried out, precipitates are added into an ethanol solution of sodium hypophosphite, reflux condensation is carried out for 30 min at the temperature of 80 DEG C, and PDA-Cu nano-particles are obtained after alcohol and water alternate centrifugation and drying treatment are carried out. And finally, physically blending the obtained QC-Ag nano-particles and PDA-Cu nano-particles with a polyacrylate emulsion in proportion, and constructing the two nano-composite finishing agents on the surface of leather by adopting layer-by-layer self-assembly, brush coating or magnetron sputtering. The leather coating prepared by the method has a remarkable inhibition effect on growth of aspergillus niger, and particularly has good wet-sensing, antibacterial and mildew-proof properties when the environment humidity changes.

The invention discloses a surface treatment method of a circuit board. The method comprises a cleaning step of cleaning the surface of the circuit board; an activation step: coating a catalyst on the surface of the circuit board to form a catalyst layer; a nickel plating step: immersing the circuit board into a nickel plating liquid medicine, and replacing the catalyst layer with a nickel layer; a gold leaching step of forming a thin gold layer on the nickel layer; the nickel plating liquid medicine comprises a nickel source agent, a reducing agent, a stabilizer and an accelerant, and based on 100 vol% of the nickel plating liquid medicine, the nickel plating liquid medicine comprises 3-7 vol% of the nickel source agent, 0.5-3 vol% of the reducing agent, 0.5-0.77 vol% of the stabilizer and 0.1-1 vol% of the accelerant. The nickel source comprises nickel sulfate, the reducing agent comprises sodium hypophosphite, and the accelerator comprises sodium sulfate. Therefore, according to the surface treatment method disclosed by the invention, through proportional configuration of the nickel plating liquid medicine, the deposition rate and uniformity of the nickel layer are effectively controlled, generation of defects on the surface of the nickel layer is inhibited, the problem of black nickel is reduced, and the conductive stability and reliability of the whole circuit board are improved.

The invention discloses a zinc-doped cobalt phosphide nitrogen carbon non-noble metal catalyst as well as a preparation method and application thereof. The method comprises the steps that 1, foamed nickel serves as an anode, a platinum metal electrode serves as a cathode, and a first solution serves as electrolyte; then uniformly distributed cobalt microspheres are formed on the surface of the foamed nickel through an electro-deposition technology, and the foamed nickel wrapped by the cobalt microspheres is obtained; step 2, dipping the cobalt microsphere coated foamed nickel in a second solution to perform a coordination chemical reaction, and forming a metal-organic framework material on the surface of the cobalt microsphere coated foamed nickel; step 3, dipping the product obtained in the step 2 in a zinc nitrate solution for ion exchange reaction to obtain a catalyst precursor; and step 4, calcining the catalyst precursor and sodium hypophosphite to obtain the catalyst. The zinc-doped Co2P nano array packaged in the nitrogen-doped carbon layer is obtained on the foamed nickel through electro-deposition, ion exchange and phosphorization, and the preparation method is simple and suitable for water electrolysis reaction.

The present application relates to the field of new materials and photocatalysis, and specifically provides a preparation method for synthesizing cobalt phosphide nanomaterials by visible light reduction of cobalt salt in aqueous solution, which uses LED lamps simulating the visible light section of sunlight as light source at normal temperature and pressure, and reduces metal cobalt salt to generate cobalt phosphide materials in an aqueous solution containing organic dye molecule fluorescein as photosensitizer, sodium hypophosphite as phosphorus source, and triethylamine as electron sacrificial agent, thus overcoming the shortcomings of high pollution and high energy consumption in the traditional preparation process of phosphide materials, and having the advantages of low consumption and environmental protection; and by adding water-soluble CTAB (bromohexadecyl trimethylamine) as a template agent, the morphology of the generated cobalt phosphide can be controlled to be nanosheet clusters. The cobalt phosphide nanoclusters prepared by the present application can be used as catalysts for the process of electrocatalytic reduction of nitrite to synthesize ammonia at normal temperature and pressure, and have significant catalytic effect and excellent cyclic catalytic stability.

The application belongs to the field of catalysis technology, and particularly relates to a basic HER catalyst electrode and a preparation method thereof. The preparation method of the basic HER catalyst electrode provided by the application comprises the following steps: 1) mixing CoCl2, NiCl2, urea and water to obtain a mixed solution; 2) immersing foamed nickel in the mixed solution in step 1) to perform a hydrothermal reaction, cooling, washing and drying to obtain a precursor; and 3) calcining the precursor with sodium hypophosphite in a protective atmosphere, cooling, washing and drying to obtain the HER catalyst electrode. The catalyst electrode prepared by using CoCl2 and NiCl2 as raw materials has rich interface regions and fine and uniform microstructures, which is helpful to expose a large number of active sites and thus improve the basic HER catalytic activity.

This invention discloses a crystal-faceted catalyst and its preparation method for removing chlorobenzene from pyrolysis gasification gas of organic solid waste, belonging to the technical field of chlorobenzene removal pollutants from pyrolysis gasification gas of organic solid waste. The method includes: firstly, acid etching modification of natural dolomite, which can effectively optimize the pore structure and alkaline site distribution of the support; then, adding cerium nitrate solution to the acid-etched dolomite to obtain an acid-etched dolomite CeO2 composite support; simultaneously placing nickel nitrate, sodium hypophosphite, a halide ion crystal facet control agent, and NaBH4 in a reactor to react and obtain a Ni2P precursor; and then loading the Ni2P precursor onto the composite support using an impregnation method to prepare a Ni2P (201) crystal-faceted catalyst. The crystal-faceted catalyst prepared by this invention can achieve highly active crystal facet directional control, possesses both high-efficiency dechlorination activity and excellent resistance to chlorine poisoning, and is suitable for complex working conditions such as pyrolysis gasification of organic solid waste.