719 results about "Ammonia production" patented technology

A composite catalyst includes a nickel foam and cobalt, copper, or both electrodeposited on the nickel foam. Making the composite catalyst includes contacting the nickel foam with an aqueous solution comprising copper, cobalt, or both, and electrodepositing nanodomains of copper, cobalt, or both, respectively, on the nickel foam. Electrochemically converting nitrate to ammonia includes contacting an electrode and a cathode comprising the composite catalyst in an electrochemical cell with an aqueous solution including nitrate, adsorbing the nitrate onto the copper, the cobalt, or both, reducing the nitrate to yield nitrite, and reducing the nitrite to yield ammonia.

The utility model provides a vertical reactor for green ammonia production, which comprises a shell, an internal part is arranged in the shell and divides the shell into a first cavity and a second cavity, an annular space is formed between the outer wall of the internal part and the inner wall of the shell, and a third cavity, a fourth cavity and an electric heater are arranged in the internal part. The device further comprises a lower heat exchanger, an upper catalyst frame assembly, a catalyst reaction cavity and a fifth cavity, a dead gas heat insulation cavity is further formed between the catalyst reaction cavity and the electric heater, and gas inlets are formed in the shell and comprise an annular gap gas inlet, a main gas inlet and a temperature adjusting gas inlet. The shell is cooled through basically constant external cold gas, large temperature fluctuation is prevented, operation under the fatigue working condition is avoided, the service life of the shell is prolonged, the heat dissipation performance of the shell is improved, the service life of the shell is prolonged, and the service life of the shell is prolonged. And the temperature of the catalyst reaction can be adjusted through external cold gas, so that the reaction efficiency of the catalytic reaction is improved.

The invention provides a comprehensive energy system optimization scheduling method and device considering diversified application of wind, light and green power, electronic equipment and a storage medium, and relates to the technical field of new energy technology and power system integration optimization. According to the method, a comprehensive energy system mathematical model integrating wind, light, green electricity, a hydrogen and ammonia production process, thermal power ammonia-doped combustion and thermal power oxygen-enriched combustion is constructed; combining the comprehensive energy system mathematical model to construct a comprehensive energy system scheduling model considering cost effectiveness, new energy utilization rate and environmental protection; and selecting a target solution algorithm from the plurality of solution algorithms, constructing an operation scene, and performing simulation solution on the integrated energy system scheduling model to obtain an integrated energy system optimization scheduling result. According to the embodiment of the invention, wind-solar-green-electricity hydrogen production ammonia synthesis and thermal-electricity ammonia-doped combustion and oxygen-enriched combustion technologies are effectively integrated, an ecological system for efficient cyclic utilization of energy and resources is created, and green transformation and industrial upgrading of an energy structure are promoted.

The invention discloses a bifunctional CoCu catalyst, a preparation method thereof and application of the bifunctional CoCu catalyst in sulfur and ammonia production. A Cu-doped CoOOH bifunctional electrocatalyst is synthesized on foam cobalt (CF) through an in-situ growth method and is used for a cathode NO3RR and an anode SOR at the same time. In a sulfur oxidation reaction, the cobalt-based catalyst can effectively oxidize sulfur or a compound thereof into a substance with a higher valence state, such as sulfate, so that removal and conversion of sulfur are realized. In addition, due to low cost and environmental friendliness of the catalyst, the catalyst has great application potential in the aspect of electrochemical coupling treatment of sulfur and nitrate pollutants. Therefore, the invention designs a bifunctional electrocatalyst capable of simultaneously exerting the advantages of Cu-based and cobalt-based catalysts, and is expected to realize efficient electrochemical coupling treatment of sulfur and nitrate.

The invention discloses a manganese dioxide nanoflower loaded copper-gallium electrocatalytic synthesis ammonia material prepared on the basis of gallium-based liquid metal. Manganese dioxide nanoflowers are synthesized through control of reducibility and surface characteristics of liquid metal, copper ions are anchored through electronegativity of manganese dioxide in an aqueous solution, and meanwhile, the copper gallium catalytic material is generated on the surface of manganese dioxide through in-situ reduction by ingeniously and secondarily utilizing the reducibility of the liquid metal. The thickness of the obtained nanoflower sheet layer is 2-20 nm, the copper-gallium alloy is spherical, and the diameter of the copper-gallium alloy is 20-80 nm. The process is safe, simple to operate and suitable for high-flux preparation. The catalytic material can work under various acid-base systems, and under the conditions that the pH is 13, the C (NO3 <->) is 0.1 M and the potential is-0.5 V vs RHE, the ammonia production rate is 4.75 mgNH3 / (mgcat.h), and the Faraday efficiency can reach 99.36%.

The invention discloses a preparation method of a pyridine-nitrogen-rich copper monatomic catalyst and application of the pyridine-nitrogen-rich copper monatomic catalyst to ammonia production through electro-catalysis of nitrate reduction, the catalyst shows good catalytic performance of ammonia production through nitrate reduction in an alkaline medium, and theory and experiments prove that the copper monatomic catalyst with rich copper-pyridine nitrogen-carbon active sites has good catalytic performance. The adsorption energy of NO3 <-> and corresponding intermediates is improved, and the energy barrier of the rate control step is reduced, so that the process of reducing nitrate to prepare ammonia is promoted.

Molecular electrocatalytic systems for ammonia production from wastewater nitrate are described. The electrocatalytic systems use ammonia-selective homogeneous molecular NOsRR catalysts in real wastewater.

A green ammonia production hydrogen load prediction method based on sparse attention variational Bayes comprises the following steps: acquiring historical data of a green ammonia electrolysis hydrogen production industry through an acquisition sensor, and dividing the historical data into a training set, a verification set and a test set; performing standardization processing on the training set, and constructing an SVAE soft measurement training model; determining a final objective function suitable for SVAE; and performing real-time online prediction on the output target variable by using the current input characteristic variable by adopting the trained SVAE. The SVAE combines CNNs, PSSAM and a cross attention mechanism, and captures a long-term dependency relationship and a complex mutual relationship in industrial data. An optimized objective function is formulated in combination with variational reasoning and a Monte Carlo method and is used for offline training. The SVAE has remarkable advantages in the process of accurately predicting the hydrogen flow and optimizing the production process of the green ammonia, the production efficiency is improved, and the energy consumption is reduced.

The invention provides a synthetic ammonia production load intelligent regulation and control method and system based on wind and light prediction, and relates to the technical field of energy and chemical production, and the method comprises the steps: collecting wind and light data and synthetic ammonia process data, and predicting a power generation power curve and a process parameter trend through a double-flow variational auto-encoder in combination with a residual connection mechanism; the method comprises the following steps: determining a technological parameter constraint and a safety boundary, establishing a technological parameter safety constraint model, obtaining a load regulation space, generating an optimal load instruction based on an optimization algorithm, and realizing intelligent load regulation and control through cascade PID (Proportion Integration Differentiation). According to the invention, accurate dynamic regulation and control of the load of the ammonia synthesis device are realized, and the wind and light absorption capability and the production efficiency are improved.

The invention discloses an ammonia-nitrogen wastewater treatment device and method capable of generating target ammonium salt, the ammonia-nitrogen wastewater treatment device comprises a bipolar membrane electrodialysis device and a membrane contactor, the bipolar membrane electrodialysis device comprises at least one treatment unit and an anode chamber and a cathode chamber which are separated by the treatment unit; the treatment unit comprises a front bipolar membrane, a front cation exchange membrane, a middle bipolar membrane, an anion exchange membrane, a rear cation exchange membrane and a rear bipolar membrane which are sequentially arranged in the direction from the anode chamber to the cathode chamber, and a feeding chamber, an ammonia production chamber, an acid production chamber, a desalting chamber and an alkali production chamber are respectively formed in spaces generated between the corresponding membranes; the membrane contactor comprises a breathable hydrophobic membrane dividing an inner cavity of the membrane contactor into a first chamber and a second chamber, and the first chamber and the second chamber communicate with the ammonia production chamber and the acid production chamber through pipelines correspondingly. And the method has relatively high application and popularization values.

The utility model provides a compound device for providing feed gas for preparing green ammonia from new energy and a green ammonia synthesis system. The composite device comprises a deep cooling air separation nitrogen generation subsystem, a hydrogen supply subsystem and a main heat exchanger, and the hydrogen supply subsystem comprises a water electrolysis hydrogen generation unit, a first hydrogen compressor, a second hydrogen compressor, a hydrogen storage tank and a hydrogen conveying pipeline. The hydrogen conveying pipeline comprises a first hydrogen conveying pipeline, a second hydrogen conveying pipeline and a third hydrogen conveying pipeline; the main heat exchanger is a multi-channel heat exchanger and comprises a first flowing channel used for flowing of a first medium and a second flowing channel used for flowing of a second medium, the second hydrogen compressor is connected with the hydrogen storage tank through the first flowing channel, and the hydrogen storage tank is connected with the third hydrogen conveying pipeline through the second flowing channel. The composite device provided by the utility model can ensure the supply stability of the raw material hydrogen of the ammonia production subsystem, and solves the technical problem that the hydrogen supply is unstable in the existing green ammonia synthesis process.

The embodiment of the invention provides a method for measuring the impurity ion carrying coefficient in urea hydrolysis ammonia production product gas. The method comprises the following steps: collecting an absorption liquid sample; the absorption liquid sample comprises an acid solution absorbing ammonia gas; measuring the content of ammonia gas and impurity ions in the absorption liquid; calculating the total amount of the product gas according to the content of the ammonia gas and the concentration of the urea solution in the hydrolyzer; the impurity ion carrying coefficient in the product gas is calculated according to the content proportional relation of the ammonia gas and the impurity ions. According to the method, the ammonia gas in the product gas is completely absorbed by adopting an acidic solution to absorb the product gas, and then the content of the ammonia and the content of impurity ions in the absorption solution are measured to quantitatively calculate the content of impurities carried by the product gas.

The invention relates to the technical field of industrial waste gas treatment, and discloses an acid gas treatment device and method for synthesis ammonia production, the acid gas treatment device for synthesis ammonia production comprises an absorption tower, a spraying system and a filler layer, the spraying system and the filler layer are installed in the absorption tower, and a receiving disc is arranged below the filler layer; the receiving disc comprises a plurality of annular plates which are vertically and coaxially distributed, the diameters of the annular plates are gradually reduced from top to bottom, the bottom of the annular plate on the lowermost side is fixedly connected with a drainage ring, the outer wall of the lower portion of the drainage ring is sleeved with a collecting cylinder, the inner wall of the drainage ring is fixedly connected with a flow slowing cylinder, and the lower portion of the flow slowing cylinder extends into the collecting cylinder. The solvent flows on the annular plate, and after the flow speed of the solvent is slowed down through the flow slowing cylinder, the solvent and impurities form a falling speed difference in the collecting cylinder, so that the impurities can effectively precipitate at the bottom in the collecting cylinder and are prevented from flowing to a filtering system of the recycling box along with the solvent, the burden of the filtering system is relieved, and the recycling efficiency of the solvent is improved.

The invention discloses an actinide-graphdiyne aerogel composite material as well as a preparation method and application thereof, and belongs to the technical field of catalyst materials. The actinide-graphdiyne aerogel composite material comprises actinide ions, iodide ions and graphdiyne aerogel, the graphdiyne aerogel is of a porous net structure, and the actinide ions and the iodide ions exist on the surface of the graphdiyne aerogel in the form of nanoclusters; and the actinide ions are selected from one of Th, Pa, U, Np, Pu and Am ions. The actinide-graphdiyne aerogel composite material can be used as a catalyst to realize efficient thermocatalytic ammonia production under mild conditions, the thermocatalytic ammonia production performance of the composite material can be regulated and controlled by changing a monomer structure for preparing graphdiyne aerogel, and even thermocatalytic ammonia production of the graphdiyne aerogel material is realized under the condition of no metal load; the catalyst is expected to become a new-generation high-performance thermocatalytic ammonia production catalyst.

The invention relates to an off-grid ammonia-hydrogen micro-grid planning method and system considering a mixed electrolytic bath and a medium, the method is applied to an off-grid hydrogen-hydrogen micro-grid, and the planning method comprises the following steps: modeling for an electric energy-hydrogen energy conversion process of various types of electrolytic bath modules; modeling for the process of transporting hydrogen produced by an electrolytic cell module to an ammonia production node by using a hydrogen long tube trailer; on the premise of considering constraint conditions, constructing a planning model of the off-grid hydrogen amino micro-grid; and performing linear processing on the constraint condition, and obtaining a planning result by solving the planning model of the off-network hydrogen amino micro-grid. Compared with the prior art, the method has the advantages of integrating the advantages of different types of electrolytic cells, reducing the total investment cost, improving the system elasticity, ensuring efficient and stable operation under different conditions and the like.

The utility model discloses hydrogen purification equipment and an ammonia production system, and relates to the technical field of hydrogen purification, and the hydrogen purification equipment comprises an air separation device, a hydrogen production device, a heat exchange part and a filtering part; the air separation device is provided with a refrigerant discharge pipe; the hydrogen production device is provided with a hydrogen discharge pipe; the heat exchange part is provided with a refrigerant inlet end, a hydrogen inlet end and a hydrogen outlet end, the refrigerant discharge pipe is communicated with the refrigerant inlet end, the hydrogen discharge pipe is communicated with the hydrogen inlet end, and a refrigerant discharged by the refrigerant discharge pipe and hydrogen discharged by the hydrogen discharge pipe can be subjected to heat exchange; the filter is provided with an inlet end and an outlet end which are mutually communicated; the inlet end is communicated with the hydrogen outlet end; according to the technical scheme, the utilization rate of hydrogen is increased.

The invention relates to a preparation method of a B, Co-Cu / C catalyst for synthesizing ammonia through electrocatalysis of NO3RR and application of the prepared catalyst. XC-72R carbon black is used as a carrier, CuCl2 and CoCl2 are used as metal precursors, NaBH4 is used as a reducing agent and a B source, and the B, Co-Cu / C catalyst is prepared through a liquid phase reduction method. The prepared B, Co-Cu / C nanoparticles are uniformly distributed on the surface of the carbon powder, the average particle size is 12.6 nanometers, elements are uniformly dispersed, and the structure is stable. The doping of Co and B can effectively adjust the electronic structure of Cu, improve the adsorption of Cu to an intermediate product, enhance the hydrolysis ability and improve the performance of NO3RR. The catalyst has excellent catalytic performance in electro-catalysis of NO3RR, the ammonia yield of the catalyst reaches 182.5 mgNH3h <-1 > mg catalyst-1, the Faraday efficiency reaches 98.4%, and the catalyst has good stability. The catalyst disclosed by the invention is simple in preparation method and excellent in performance, not only provides a catalytic material for solving nitrate water body pollution and efficiently electrocatalytically synthesizing ammonia, but also provides a new thought for designing a high-performance NO3RR ammonia synthesis catalyst.

The invention provides an improved ammonia production system based on a temperature swing adsorption principle. The improved ammonia production system comprises a water electrolysis hydrogen production module, a deep cooling air separation nitrogen production module, a multi-stage ammonia synthesis tower module and a double-bed circulating adsorption separation ammonia module, the water electrolysis hydrogen production module and the deep cooling air separation nitrogen production module provide raw material gas for the multi-stage ammonia synthesis tower module through a mixer, low-grade waste heat of a multi-stage ammonia synthesis tower serves as a heat source of the double-bed circulating adsorption separation ammonia module, and the double-bed adsorption separation ammonia module is connected with the multi-stage ammonia synthesis tower. The working conditions of an adsorption bed of the double-bed ammonia adsorption and separation module comprise an adsorption working condition and a desorption working condition, the adsorption bed alternately performs the adsorption working condition and the desorption working condition within the operation time, and low-grade waste heat from a multi-stage ammonia synthesis tower is used for driving to perform separation operation on ammonia synthesis gas so as to obtain high-purity ammonia; according to the invention, the operation pressure in an ammonia product separation project can be effectively reduced, circulation is formed, and the purity and the recovery rate of the obtained ammonia product are not reduced while the waste heat in the system is further utilized.

An ammonia production method involves producing ammonia from nitrogen molecules, in a production device for performing electrolysis, in the presence of a metal complex and a solid catalyst in a cathode, by providing electrons from a power source, protons from a proton source, and nitrogen molecules from a means for supplying nitrogen gas, and by providing hydrogen molecules by sending hydrogen molecules to an anode including sending hydrogen gas produced at the cathode to the anode. Concerning a metal complex and a solid catalyst, as the metal complex, rac-ethylenebis(4,5,6,7-tetrahydro-1-indenyl) zirconium dichloride or the like is used, and as the solid catalyst, a metal catalyst or the like is used.

The invention discloses a preparation method and application of a molybdenum monatomic photocatalyst for producing ammonia through nitrogen reduction, and belongs to the technical field of photocatalytic material preparation. According to the preparation method, molybdenum hexacarbonyl is taken as a metal precursor, and molybdenum single atoms are introduced into a covalent organic framework material sp2c-COF by adopting a solvothermal synthesis method, so that the covalent organic framework photocatalyst is obtained; according to the covalent organic framework photocatalyst, molybdenum single atoms are anchored, the local coordination environment of a covalent organic framework is finely controlled, the unique electronic structure and catalytic activity of the molybdenum single atoms can effectively optimize electron cloud distribution of COFs, the adsorption and activation capacity on nitrogen molecules is enhanced, and the covalent organic framework photocatalyst has the advantages that the covalent organic framework photocatalyst is high in catalytic activity and high in catalytic activity; the covalent organic framework photocatalyst can effectively inhibit the compounding of photo-induced electron-hole pairs so as to prolong the service life of photo-induced electrons, so that the covalent organic framework photocatalyst has excellent ammonia production performance, and the ammonia production activity can reach 372.6 [mu] mol.g <-1 >. H <-1 > under the conditions of visible light and pure water.

The invention relates to the technical field of industrial process on-line monitoring, in particular to a multi-parameter on-line collaborative monitoring method in ammonia water production, which comprises the following steps: preprocessing a signal; obtaining an equivalent conductivity value after temperature compensation and a corrected pH value after comprehensive compensation; according to the equivalent conductivity value and the corrected pH value, carrying out parallel calculation to obtain a first concentration presumption value and a second concentration presumption value; comparing the deviation with a preset rationality threshold value to check the consistency of the monitoring system; carrying out weighted fusion on the two values by utilizing the dynamic weight, and outputting a final fusion concentration value; under the abnormal working condition, a potential fault source is identified, and a reliable standby data source is adaptively selected to output a temporary concentration value. By means of temperature compensation, concentration presumption, data fusion and fault-tolerant processing, the system can accurately monitor the concentration of ammonia water in real time and automatically conduct self-correction under the abnormal condition, and high-precision and high-reliability monitoring of the production process is guaranteed.

Disclosed is a system and method for identifying various combinations of parcels of land with sufficient transmission, resources, market demand, and available land to build a construct a green hydrogen facility, synthetic natural gas facility and / or an ammonia production facility. Different criteria associated with each parcel of land include land characteristics, including size, ownership, transportation networks, power and water network prices, factories / plants, wells, and community-specific information, market characteristics including historical locational marginal pricing (LMPs). In one example, the present invention identifies clusters of land parcels that minimize the number of land owners, maximize buildable land, minimize transmission cost, maximize NCF, and maximize nodal LMPs.

The invention relates to a wind-light-fire-storage coupled water electrolysis hydrogen production comprehensive energy system. The system comprises a wind-light power generation unit, a thermal power generation unit, an energy storage unit, a mixed hydrogen production unit, an air separation unit, an ammonia gas synthesis unit, a flue gas carbon capture unit, a methanol synthesis unit, an oxygen-enriched combustion unit and an ammonia-doped combustion unit. According to the wind-light-fire-storage coupled water electrolysis hydrogen production comprehensive energy system, wind-light-fire-storage integrated cooperative operation is achieved, hydrogen production, ammonia production and alcohol production processes are combined, peak regulation, frequency modulation and voltage regulation are facilitated, and the stability and safety of a power system are guaranteed. Power generation through renewable energy sources such as wind and light is combined with hydrogen production through water electrolysis, green hydrogen with economic cost can be produced, excessive wind and light resources are consumed, and the phenomenon of wind and light abandoning is reduced. The hybrid hydrogen production technology can effectively solve the problems of intermittency and volatility of wind and light and coupling between hydrogen production equipment, realizes flexible hydrogen production, improves the wind-light-electricity absorption efficiency, and enhances the overall stability of the system.

The invention belongs to the technical field of ammonia synthesis and electro-catalysis, and particularly relates to a preparation method and application of high-entropy alloy aerogel for electro-catalysis. The preparation method comprises the following steps: mixing an inorganic metal salt in a solvent to obtain a precursor solution, quickly adding a reducing agent, standing, and washing and drying the obtained product to obtain the high-entropy alloy aerogel catalyst, the inorganic salt is selected from five or more of copper salt, cobalt salt, iron salt, nickel salt, palladium salt, gold salt, ruthenium salt, platinum salt and silver salt. The three-dimensional continuous porous reticular high-entropy alloy aerogel is obtained through one-step reduction of the inorganic metal salt and standing assembly, the high-entropy alloy aerogel prepared through the method is high in reduction assembly speed, phase separation of multi-component alloy can be effectively inhibited, an amorphous alloy structure is obtained, and therefore when the high-entropy alloy aerogel is applied to ammonia production through electro-catalysis nitrate reduction, the high-entropy alloy aerogel can be used for preparing the high-entropy alloy aerogel. And excellent electrochemical activity and stability can be presented in an ultra-low overpotential range of-0.2 to + 0.2 V vs.RHE.

The invention relates to the technical field of electrode material preparation and electro-catalysis application, in particular to preparation of an F-doped CuO-Co3O4 electrode material and application of the F-doped CuO-Co3O4 electrode material to ammonia production through electro-catalytic reduction of nitrate under a low-voltage condition. The transition metal heterojunction electrode material (F-doped CuO-coated Co3O4) is prepared through a two-step method, firstly, transition metal salt is loaded on a substrate electrode through a molten salt method, and then the transition metal heterojunction electrode material is obtained through a hydrothermal method and calcination. And the prepared electrode material has the outstanding advantages of low voltage and high yield in ammonia production through nitrate reduction. Especially, under the neutral condition, the composite material shows excellent electrocatalytic activity, under-0.55 V, the ammonia yield is up to 42.83 mg / h.cm < 2 >, the Faraday efficiency is 99.36%, and the composite material can be recycled for more than 15 times and has good stability. The electrode material is simple in preparation process, low in cost and environmentally friendly, large-scale special equipment is not needed in the whole production process, industrial production is easy to achieve, and the electrode material has wide market application prospects.

A compression unit for ammonia comprising a multi-stage compressor, including a first set of compressor stages adapted to compress a syngas containing hydrogen and nitrogen; and a second set of compressor stages adapted to compress a refrigerant of a refrigerant circuit. Described herein is also an ammonia production system including the ammonia compression unit and a method.

The invention belongs to the technical field of photoelectrocatalysis ammonia synthesis catalysts, and particularly relates to a preparation method of a self-decomposition composite catalyst and application of the self-decomposition composite catalyst to construction of a photoelectrochemical cell in ammonia production. The preparation method of the self-decomposition composite catalyst comprises the following steps: mixing and dissolving cupric acetate, cobaltous acetate and urea, placing the mixture and a treated titanium mesh in a reaction kettle, carrying out hydrothermal treatment to obtain a precursor material, carrying out self-decomposition on CuCo2O4 in a calcining process in a muffle furnace to generate CuO and form an interface-free heterojunction so as to obtain a catalyst-loaded integrated electrode, and carrying out self-decomposition on the catalyst-loaded integrated electrode so as to obtain the self-decomposition composite catalyst. The catalyst is used for producing ammonia through photoelectrocatalysis nitrate reduction. The photoelectrochemical cell constructed by the integrated electrode disclosed by the invention has the characteristics of high Faraday efficiency, high ammonia yield, high conversion rate, excellent repeatability and the like, and has the advantages of low cost, simple process, environmental protection, no pollution and energy conservation.

The invention discloses a cobaltosic oxide catalyst doped with lanthanide metal, a preparation method of the cobaltosic oxide catalyst and application of the cobaltosic oxide catalyst to ammonia production through nitrate reduction. The method comprises the following steps: carrying out hydrothermal reaction on cobalt nitrate hexahydrate and a lanthanide metal salt precursor in a mixed system of isopropanol and glycerol, and then carrying out high-temperature calcination to prepare the lanthanide metal-doped cobaltosic oxide catalyst. The preparation method disclosed by the invention is simple to operate and low in cost, the prepared lanthanide metal-doped cobaltosic oxide catalyst shows excellent Faraday efficiency, ammonia yield and cycling stability in an electro-catalysis nitrate reduction reaction, a traditional path of preparing ammonia from nitrate is broken through, and more efficient performance is realized.

The invention belongs to the field of photoelectrocatalysis ammonia production, and particularly discloses a Ti (at) TiO2 array (at) CuxPt alloy composite electrode, preparation of the Ti (at) TiO2 array (at) CuxPt alloy composite electrode and application of the Ti (at) TiO2 array (at) CuxPt alloy composite electrode to photoelectrocatalysis NO3 <-> reduction ammonia production, and the Ti (at) TiO2 array (at) CuxPt alloy composite electrode comprises a Ti substrate, a TiO2 nanosheet array growing on the surface of the Ti substrate in an in-situ mode and nano CuxPt alloy particles distributed on the TiO2 nanosheet array in a dispersed mode; tiO2 nanosheets in the TiO2 nanosheet array grow in the Z-axis direction of the Ti substrate; and a heterogeneous interface exists between the nano CuxPt alloy particles and the TiO2 nanosheet array. The self-supporting material provided by the invention has excellent NH3 production activity, Faraday efficiency and stability.

The invention relates to copper-modified wheel-type tungsten phosphate, a preparation method of the copper-modified wheel-type tungsten phosphate and application of the copper-modified wheel-type tungsten phosphate in production of ammonia through electro-catalysis of nitrite reduction, and provides the copper-modified wheel-type tungsten phosphate, the preparation method of the copper-modified wheel-type tungsten phosphate and application of the copper-modified wheel-type tungsten phosphate in production of ammonia through electro-catalysis of nitrite reduction. According to the invention, the transition metal copper is introduced on the basis of K28Li5 [H7P8W48O184] 92H2O (hereinafter referred to as P8W48). K12Li13 [Cu20Cl (OH) 24 (H2O) 12 (P8W48O184)]. 22H2O (hereinafter referred to as Cu20P8W48) is formed through self-assembling and positioning, and the K12Li13 [Cu20Cl (OH) 24 (H2O) 12 (P8W48O184)]. 22H2O is applied to reduction of nitrite through electro-catalysis to prepare ammonia.