608 results about "Alloy catalyst" patented technology

The invention discloses a chromium group metal doped platinum alloy catalyst as well as a preparation method and application thereof, and relates to a platinum alloy catalyst as well as a preparation method and application thereof. The technical problem that an existing alloy catalyst formed by Pt and transition metal is poor in catalytic activity and durability is solved. According to the catalyst, PtM alloy nano-particles doped with a chromium group element X are uniformly supported on a carbon carrier; in the PtM alloy doped with the chromium group element X, X exists in the form of a simple substance, and the mass percentage content of X is 5%-10%; the X-PtM / C is marked as X-PtM / C, and X is Cr, Mo or W; m is Fe, Co or Ni. The preparation method comprises the following steps: carrying out secondary reduction and high-temperature heat treatment by taking Pt / C as a precursor to obtain the catalyst. The mass activities of Cr-PtNi / C, Mo-PtNi / C and Cr-PtCo / C are respectively 0.419 A / mgPt, 0.254 A / mgPt and 0.314 A / mgPt, and are 5.0 to 8.1 times of that of Pt / C. And after the Cr-PtNi / C is aged for 30000 circles, the potential is not attenuated. The invention can be used in fuel cell field.

The invention discloses a method for preparing a rare earth high-entropy alloy catalyst and application of the rare earth high-entropy alloy catalyst. The method comprises the following steps: (1) carrying out ball milling to obtain alloy powder; (2) the alloy powder is pressed into a cylinder for sintering; (3) crushing the sintered metal cylinder into rare earth high-entropy alloy powder; (4) carrying out wet mechanical ball milling on the rare earth high-entropy alloy powder; and (5) the ball-milled rare earth high-entropy alloy powder is centrifuged and then dried. The invention further discloses application of the obtained six-element rare earth high-entropy alloy catalyst, the six-element rare earth high-entropy alloy catalyst has excellent catalytic performance, and the hydrogen absorption and desorption dynamic performance of MgH2 is remarkably improved.

The invention discloses a preparation method of a Co / Cu nano-alloy catalyst for reducing ammonia through electro-catalysis of nitrate, and belongs to the technical field of electro-catalysts and preparation thereof. The invention solves the problems of low Faraday efficiency and low yield in the process of converting nitrate into ammonia through electro-catalysis in the prior art. According to the invention, Cu and Co are compounded to prepare the catalyst of nitrate reduced ammonia with a nanoneedle structure, and the catalyst shows excellent Faraday efficiency and yield in nitrate reduced ammonia. A test result shows that the ammonia yield of the prepared Co / Cu nano-alloy catalyst reaches up to 16762.68 ugh <-1 > cm <-2 > and the Faraday efficiency is kept above 90% when the Co / Cu nano-alloy catalyst is in a mixed solution of 0.1 mol / L KNO3 and 1 mol / L KOH and the RHE is-0.5 Vvs.RHE. In addition, when the catalyst is at-0.4 V vs.RHE, the ammonia yield and the Faraday efficiency are kept stable during 10 cycles of the reaction.

The invention discloses a method for preparing a platinum-based alloy catalyst by using a plasma enhanced chemical vapor deposition low-temperature technology, relates to a preparation method of a platinum-based alloy catalyst, and aims to solve the technical problems that a carbon layer is not uniformly coated and metal particles of the catalyst are easy to agglomerate in a high-temperature calcination process in the existing platinum-based alloy catalyst prepared by carbon coating. The method comprises the following steps: 1, preparing Pt / C by a polyhydric alcohol reduction method; 2, pre-treating a Pt / C catalyst; 3, preparing M-Pt / C by a dipping evaporation method; 4, PECVD carbon shell coating is carried out; (5) alloying; and 6, removing a part of carbon shell to obtain the platinum-based alloy catalyst. When the Pt / C catalyst is used for preparing a membrane electrode of a proton exchange membrane fuel cell, the peak power density can reach 1.72-1.89 W / cm < 2 > under a hydrogen-air condition, which is improved by 20.3% and 32.2% compared with a membrane electrode of a commercial 20% Pt / C catalyst, and the Pt / C catalyst can be used in the field of proton exchange membrane fuel cells.

The invention provides a preparation method of a cobalt-based bimetallic alloy positive electrode lithium supplement composite material and an application technology of the cobalt-based bimetallic alloy positive electrode lithium supplement composite material in a battery. The lithium-supplementing composite material is a lithium salt, a cobalt-based bimetallic alloy catalyst for promoting low-pressure decomposition of the lithium salt, and a positive electrode material. The lithium salt is lithium oxalate, the cobalt-based bimetallic alloy catalyst is prepared from nitrogen and sulfur co-doped carbon impregnated in a transition metal salt solution through freeze drying and high-temperature calcination, and the positive electrode material comprises one of lithium iron phosphate, lithium cobalt oxide and ternary high nickel (LiMO2, M = Ni, Co and Mn). When the lithium supplement agent is applied to a secondary lithium ion battery, the decomposition voltage of the lithium supplement agent can be reduced, the irreversible loss of capacity is reduced, and the initial coulombic efficiency is improved.

The invention discloses a synthesis method of an in-situ carbon-loaded osmium-platinum single-phase solid solution nano-alloy catalyst and application of the nano-alloy catalyst in a hydrogen evolution reaction, and solves the technical problems that when an existing osmium-platinum alloy catalyst is used, the loading process is tedious and time-consuming, and the catalytic performance becomes poor due to non-uniform loading. The method comprises the following steps: respectively weighing an osmium compound and a platinum compound, mixing the osmium compound and the platinum compound, and adding the mixture into a polyol solvent until the mixture is completely dissolved to obtain a precursor solution; the preparation method comprises the following steps: preparing a carbon carrier, adding the carbon carrier into a polyol solvent until the carbon carrier is completely dissolved to obtain a carrier solution, and heating the carrier solution to 150-300 DEG C; in an inert atmosphere, adding the precursor solution into the heated carrier solution within two minutes, uniformly stirring, and preserving heat to obtain a mixed solution; and sequentially washing, centrifuging and drying to obtain the in-situ carbon loaded osmium-platinum solid solution nano-alloy catalyst. The method is simple in synthesis and high in synthesis efficiency, and the catalyst which is uniformly dispersed in a loaded state can be obtained.

The invention relates to a hollow mesoporous carbon sphere prepared based on a confinement polymerization method and a preparation method of a platinum alloy catalyst loaded by the hollow mesoporous carbon sphere and doped with rare earth metal. The method comprises the following steps: by taking mesoporous silica as a template, introducing an initiator and a small molecular organic matter precursor into mesopores, and carrying out confinement polymerization in the mesopores to obtain a silica / polymer composite; carrying out high-temperature calcination and etching treatment on the complex to obtain hollow mesoporous carbon spheres; the carbon sphere is used as a carrier to load a platinum alloy doped with rare earth metal. The hollow mesoporous carbon spheres prepared by the method have good spherical morphology and mesoporous channels and high specific surface area, and the problems of non-uniform morphology, unobvious mesopores and the like in a traditional method are solved. After platinum alloy particles doped with rare earth metal are loaded on the carbon spheres, the problems of agglomeration, wide particle size distribution, poor performance and the like of the platinum alloy particles are solved.

The present invention relates to the technical field of mixing containers, and discloses a reaction kettle for a fuel cell multi-component alloy catalyst, the reaction kettle comprises a kettle body, the kettle body is provided with a feed pipe and a discharge pipe, and the kettle body is further internally provided with a stirring assembly, a gas inlet assembly and a pneumatic auxiliary assembly, the stirring assembly comprises a stirring shaft, a spiral stirring blade fixedly installed on the stirring shaft and a crushing net for crushing fluid masses, the spiral stirring blade is driven by the stirring shaft to rotate, mixing of different solutions is accelerated, the large fluid masses or vortexes can be crushed in cooperation with the crushing net, stirring is more uniform and efficient, and the stirring efficiency is improved. Through the cooperation of the air inlet assembly and the air inlet pipe, the pressure in the kettle body can be conveniently adjusted, meanwhile, the effect of auxiliary stirring can be achieved, airflow in the air inlet pipe can drive the spiral impeller to rotate and move downwards, mixing of a powder additive and a solution is promoted, and the powder additive is prevented from floating on the liquid level.

The invention discloses a nano-alloy catalyst for anion exchange membrane electrolyzed water and a preparation method of a membrane electrode of the nano-alloy catalyst, when any one of manganese salt, cerium salt, chromium salt, cobalt salt, lanthanum salt, ruthenium salt and iridium salt is not added, NiFe binary alloy powder is obtained, the content of Ni is 90%-100%, and the content of Fe is 0%-10%; when any one of manganese salt, cerium salt, chromium salt, cobalt salt, lanthanum salt, ruthenium salt and iridium salt is added, NiFe ternary alloy powder is obtained, the content of Ni is 76%-96%, the content of Fe is 4%, and the content of the third element is 0%-20%. The nano-alloy catalyst material for anion exchange membrane water electrolysis prepared according to the invention is good in corrosion resistance and high in stability, the total water splitting efficiency is further improved, the synthesis method is simple, the used metal salt is low in cost, the metal salt can be uniformly loaded on a substrate carrier through spraying, and industrial application of total water splitting under high current density is easy to realize.

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention discloses a non-noble metal M-doped carbon-supported PtM alloy catalyst as well as a preparation method and application thereof, relates to a PtM alloy catalyst as well as a preparation method and application thereof, and aims to solve the technical problems of poor catalytic activity and insufficient adaptability of the existing PtM alloy catalyst. According to the catalyst, PtM alloy nanoparticles are uniformly supported on a non-noble metal M-doped carbon carrier, wherein M is Co, Fe, Zn, Ni or Ce. The preparation method comprises the following steps: M-doped carbon is taken as a carrier, Pt is loaded by adopting a microwave reduction method, then the non-noble metal M-doped carbon-loaded PtM alloy catalyst is obtained through high-temperature alloying, the mass activity of PtCo / Co-NC-C and the mass activity of Pt / Fe-NC-C are 0.381 mA / [mu] gPt and 0.285 A / mgPt respectively and are about 3.4 times and 2.5 times of the mass activity of 20% Pt / C, and the catalyst can be used in the field of proton exchange membrane fuel cells.

The invention discloses a small-particle-size platinum-based intermetallic compound fuel cell cathode catalyst and a preparation method thereof, rich FeNx sites are generated through nitrogen-rich porous carbon to anchor Pt-based nanoparticles in situ, so that the interaction between a carrier and an alloy is enhanced, the growth of the particles is effectively inhibited, and the formed Pt-based ordered alloy is only 2.3 nm. According to the prepared catalyst, the stable ordered structure is reserved, meanwhile, the Pt atom utilization rate is effectively increased, and preparation of the efficient low-Pt catalyst is achieved. The preparation method is simple, low in cost and good in reproducibility, and the platinum-based alloy catalyst prepared on the basis of the method shows excellent catalytic activity in a battery.

The invention belongs to the technical field of catalysts, and discloses a rare earth platinum alloy catalyst and a preparation method and application thereof. The catalyst comprises a nitrogen-doped carbon carrier, and a PtGd alloy and a Ni elementary substance are loaded on the nitrogen-doped carbon carrier. The preparation method comprises the following steps: (1) preparing a Gd-ZIF material; and (2) uniformly mixing the Gd-ZIF, the platinum source solution and the nickel source solution, carrying out vacuum drying treatment, heating to 700-1000 DEG C in a reducing atmosphere, keeping the temperature for 1-2 hours, and cooling to room temperature to obtain the rare earth platinum alloy catalyst. The invention discloses application of a rare earth platinum alloy catalyst which is used as a cathode oxygen reduction reaction catalyst of a hydrogen fuel cell. The preparation method disclosed by the invention is simple to operate and can be used for large-scale preparation; the Pt content of the rare earth platinum alloy catalyst prepared by the method is reduced to 13%, and the cost of raw materials is directly and greatly reduced; the maximum half-wave potential of the rare earth platinum alloy catalyst can reach 0.93 V vs.RHE which is far higher than that of commercial Pt / C.

The invention discloses a method for preparing a methanol fuel cell anode catalyst by doping a modified multi-walled carbon nanotube carrier. The method comprises the following steps: 1) acidizing an unmodified multi-walled carbon nanotube; (2) preparing the cerium oxide doped modified multi-walled carbon nanotube; and 3) preparing the cerium oxide doped modified multi-walled carbon nanotube carrier loaded PtFe bimetallic alloy catalyst. According to the method disclosed by the invention, the MWCNTs are induced by doping CeO2 to generate more oxygen vacancy defects, so that anchoring of more active sites of the PtFe alloy is facilitated, and MOR is promoted to improve the activity of the catalyst; the stable Ce < 4 + > can deform the surface structure of Pt, so that the binding bond energy of COads and-OH is stronger, and an anti-poisoning effect is achieved; the introduced Fe element and Pt have metal electronegativity difference, so that the adsorption bond energy of formic acid, formaldehyde and carbon monoxide intermediates generated by gradual dehydrogenation of Pt and methanol can be weakened, and the anti-toxicity effect is achieved; and the PtFe alloy and the CeO2 / MWCNTs are in synergistic interaction, so that the stability of the catalyst can be enhanced.

The invention provides a preparation method of a high-entropy alloy catalyst, which comprises the following steps: weighing at least five metal precursors such as iron, nickel, cobalt, magnesium, aluminum, niobium and tungsten according to a certain molar ratio, premixing solid powder by a mechanical ball milling method, filling the mixed powder into a crucible of an electric arc melting furnace, placing a reaction device in an inert atmosphere, and carrying out ball milling to obtain the high-entropy alloy catalyst. And material oxidation is prevented. Through arc discharge, the raw materials are melted in a rapid heating mode, and meanwhile in the melting process, electromagnetic stirring is used for ensuring that the materials are fully mixed and homogenized. And after smelting is completed, a melt is rapidly cooled and solidified under the action of a cooling system, after a sample is completely cooled, the crucible is taken out, thermal reduction is conducted in a reducing atmosphere, and the ammonia decomposition high-entropy alloy catalyst is obtained. The catalyst prepared by the invention has the characteristics of high activity, short preparation process time and high homogenization degree.

The invention relates to a membrane electrode and application thereof in deuterium-enriched water, and belongs to the field of clean energy development and utilization. The membrane electrode comprises a proton exchange membrane, an anode catalyst and a cathode catalyst, the anode catalyst is an iridium / iridium oxide catalyst with a three-dimensional porous network structure, and the cathode catalyst is a platinum-ruthenium alloy catalyst. The preparation method comprises the following steps: coating one side of the N117 proton exchange membrane with the anode catalyst, coating the other side of the N117 proton exchange membrane with the cathode catalyst, and then performing hot pressing to prepare the membrane electrode. The method comprises the following steps: assembling a membrane electrode into an electrolytic cell, and electrolyzing water by using the electrolytic cell to realize deuterium enrichment. The membrane electrode and the electrolytic cell are reasonable in design, the preparation process is simple and controllable, and the obtained product is high in efficiency and long in service life when used for enriching deuterium and facilitates industrial application.

The invention discloses a surface oxidation monatomic nano-alloy catalyst as well as a preparation method and application thereof, and belongs to the technical field of advanced nano-energy materials and electro-catalysis. A surface-oxidized monatomic nano-alloy catalyst comprises a hydroxylated carbon nanotube carrier and bimetallic nano-alloy particles loaded on the hydroxylated carbon nanotube carrier, in the bimetallic nano-alloy particles, non-noble metal elements are dispersed in noble metal nano-particles in a monatomic form, the size of the bimetallic nano-alloy particles is 3-4 nm, and the surface-oxidized monatomic nano-alloy catalyst is prepared from a surface-oxidized monatomic nano-alloy catalyst. An oxide layer with the thickness of 0.3-0.6 nm is arranged on the surface of the bimetallic nano-alloy particle; the loading amount of the noble metal is 5-15wt%. Ruthenium and other non-noble metal elements are alloyed and anchored on the carbon material substrate, the conductivity of the catalyst can be greatly improved, the size of alloy particles is accurately controlled within the range of 3-4 nm, active sites can be exposed to the maximum extent, and structural stability is considered.

The invention belongs to the technical field of new energy and electrochemistry, and particularly relates to a corrosion-resistant structured transition metal alloy electrode suitable for hydrogen production from alkaline water and a preparation method of the corrosion-resistant structured transition metal alloy electrode. The method comprises the following steps: sequentially carrying out sand blasting treatment and electrochemical activation treatment on a nickel net substrate so as to improve the surface roughness and the number of active sites; and then performing constant-current deposition in an electro-deposition solution containing nickel salt and ferric salt and / or cobalt salt, and constructing a nickel-based alloy catalyst layer in a micron array shape to obtain the alloy electrode. Through observation of a scanning electron microscope, the surface of the obtained electrode has a sphere-like microstructure, the arrangement is compact, and the catalytic efficiency and durability can be improved. The prepared structured alloy electrode has the advantages of being high in interface bonding force, high in electro-catalytic performance, high in alkali corrosion resistance and the like, and is suitable for efficient and long-term operation of hydrogen production through alkaline electrolysis of water.

The invention aims to provide a preparation method and application of a high-dispersion PtCo alloy catalyst based on a'pyrolysis etching-confinement pyrolysis' strategy, belongs to the technical field of functional materials, and provides a'pyrolysis etching confinement pyrolysis' strategy for constructing a high-dispersion PtCo alloy. The alloy is confined in a porous carbon framework from a polyhedron of ZIF-67. The method comprises the following steps: firstly, performing pyrolysis etching on ZIF-67 to generate nitrogen-containing porous cavities and disordered and uniform Co particles / clusters; then, through the Pt-N coordination effect and a narrow hole inherited from ZIF-67, Pt atoms are subjected to spatial coordination confinement. And then adjusting the alloy temperature and atmosphere to prepare the PtCo alloy catalyst which is highly dispersed and limited in the polyhedral porous carbon framework of the ZIF-67. According to the preparation method disclosed by the invention, a new strategy that Pt is loaded on the etched ZIF-67 derived carbon and then the uniformly dispersed superfine alloy is alloyed and constructed is provided, and a new method is provided for designing various alloy catalysts. The catalyst shows excellent catalytic performance in alkaline hydrogen evolution reaction.

The present invention discloses a bismuth-copper single-atom alloy catalyst, a preparation method and an application thereof. The catalyst includes copper nanoparticles and bismuth atoms. The copper nanoparticles are of a polycrystalline structure, and the bismuth atoms are dispersed in the copper nanoparticles in a single-atom form. The catalyst is prepared by means of thermal decomposing the metal complex and the followed in-situ electroreduction. The preparation method of the bismuth-copper single-atom alloy catalyst of the present invention is simple to operate, and the single-atom bismuth content is adjustable. The single-atom bismuth content can be adjusted by changing reaction conditions. By means of loading mutually isolated bismuth atoms on the copper nanoparticles, the electronic state of copper atoms is adjusted, such that an ability of bismuth-copper single-atom alloy to catalyze carbon-carbon coupling is improved, so as to obtain a higher selectivity of electrocatalytically reducing carbon dioxide to a multi-carbon product, providing a new way for efficient conversion of carbon dioxide.

The invention discloses an ultrasonic impregnation preparation method of a nickel alloy type electrolytic catalyst. The ultrasonic impregnation preparation method comprises the steps of substrate pretreatment, precursor preparation and catalyst film preparation. Through the mode, the ultrasonic impregnation preparation method of the nickel alloy type electrolytic catalyst can replace a Pt-based catalyst which is high in cost, a synergistic effect is generated through interaction of two or more metal elements, the catalytic performance, stability and corrosion resistance of the alloy catalyst under high-concentration alkaline large current are improved, HER reaction is facilitated, and the nickel alloy type electrolytic catalyst can be used for preparing a high-efficiency electrolytic catalyst. And moreover, the dependence on single noble metal is reduced, the production cost of the catalyst can be remarkably reduced, and the resource utilization efficiency, the energy efficiency and the environmental friendliness are improved.

The invention discloses a method for regulating and controlling the particle size of platinum alloy in a catalyst by using a surfactant compound, relates to a preparation method of a platinum alloy catalyst, and aims to solve the technical problem that the alloy is easy to agglomerate in the high-temperature sintering process of the existing platinum-based alloy catalyst. The method comprises the following steps: stirring and reacting polyvinylpyrrolidone and a surfactant at the temperature of 25-40 DEG C to obtain a compound solution; and adding a carbon carrier, chloroplatinic acid and transition metal salt into the compound solution, stirring, evaporating the solvent to dryness, and calcining to obtain the platinum-based alloy catalyst with regulated and controlled platinum alloy particle size. The particle size of the platinum alloy in the catalyst is 2.5-4.5 nm, the mass activity of the catalyst is 0.14-0.33 mA / [mu] gPt, the preparation method is simple, the cost is low, and batch production can be realized. The invention can be used in the field of proton exchange membrane fuel cells.

The invention provides a preparation method of a Ru-based alloy type catalyst and application of the Ru-based alloy type catalyst in acidic water electrolysis, and belongs to the technical field of hydrogen production through water electrolysis. According to the Ru-based alloy type acidic water electrolysis catalyst provided by the invention, Ti-based, Mn-based or Co-based oxides are firstly loaded on a porous substrate, then Ru-based metal is further loaded on the basis of loading the oxides, and the Ru-based alloy is prepared by performing electrochemical reduction on the Ru-based metal. According to the catalyst, a porous substrate serves as a growth matrix, Ti-based, Mn-based or Co-based oxide is prepared through a hydrothermal method, then Ru-based alloy is loaded, an efficient and high-stability three-dimensional self-supporting porous electrode is successfully developed, and a new thought is provided for seawater electrolysis hydrogen production.

The preparation method comprises the following steps: 1) mixing carbonate, a copper precursor, a silver precursor and a supporting electrolyte, and heating the mixture to 400-600 DEG C in a protective atmosphere to obtain a molten electrolyte; 2) introducing a protective atmosphere into a gas washing bottle containing deionized water, and continuously introducing gas flowing out of the gas washing bottle into the bottom of the molten electrolyte; and (3) taking a graphite sheet or a metal sheet as a cathode, taking a graphite rod as an anode, applying 1.8-2.5 V constant voltage or 100-300 mA. Cm <-2 > constant current to electrolyze for 0.5-10 hours, taking out the cathode, scraping off powder on the surface, and performing ultrasonic washing and drying. The preparation of the high-load and high-dispersion copper-silver double-monatomic alloy catalyst is realized, and the preparation method has the advantages of simple synthesis method, good process controllability, low production cost, environmental friendliness, high electrolytic efficiency and the like, and has a wide application prospect.

The invention discloses a coated SiC-coated NiFe microwave catalyst, a preparation method thereof and an application of the coated SiC-coated NiFe microwave catalyst in catalytic conversion of polyolefin plastics, and relates to the technical field of preparation of catalysts and chemical recovery of plastics. The coated SiC-coated NiFe microwave catalyst comprises a porous silicon carbide round rod and a nickel-iron alloy catalyst layer coated on the surface of the porous silicon carbide round rod. According to the coated SiC-coated NiFe microwave catalyst, a porous SiC rod is coated with NiFe-gel through a sol-gel method, a precursor is prepared, and then thermal reduction treatment is performed, so that the coated SiC-coated NiFe microwave catalyst is obtained. According to the coated SiC-coated NiFe microwave catalyst disclosed by the invention, polyolefin plastic can be quickly and highly selectively converted into hydrogen and carbon nanotubes. Compared with the traditional chemical recovery technology, the method has the characteristics of rapid reaction, high selectivity and environmental protection. And the coated SiC-coated NiFe microwave catalyst has the advantages of simple synthesis method, excellent wave absorbing performance, low energy consumption, stable performance and the like, is a recycled material which is more energy-saving and lower in cost, and shows wide practical application value.

The invention belongs to the technical field of battery catalysts, and discloses a carbon-supported platinum-cobalt ordered alloy catalyst and a preparation method and application thereof. The carbon-loaded platinum-cobalt ordered alloy catalyst comprises a porous carbon carrier and an active component loaded on the porous carbon carrier, the active components comprise platinum and cobalt, and the platinum and the cobalt form a face-centered cubic structure with ordered atom arrangement. The carbon-supported platinum-cobalt ordered alloy catalyst has the advantages of better catalytic efficiency, stability and durability, and is beneficial to further improvement of the performance of the fuel cell.

The invention provides a nano-porous composite electro-catalytic material and a preparation method and application thereof.The composite electro-catalytic material comprises a nano-porous alloy catalytic layer and an electroplating alloy catalytic layer, the nano-porous alloy catalytic layer comprises a metal substrate and a nano-porous structure, the nano-porous structure is formed on the surface of the metal substrate, and the electroplating alloy catalytic layer is formed on the surface of the metal substrate. And the electroplating alloy catalyst layer is formed on the surface of the nano-porous structure through electroplating. According to the invention, the electroplating alloy catalyst layer and the nano-porous structure layer are strongly combined to increase the bonding strength and the structural stability, and the nano-porous structure can accelerate the permeation of electrolyte and the diffusion of H2 bubbles, so that the mass transfer efficiency and the gas diffusion rate in the HER process under high current are ensured; meanwhile, the large specific surface area can provide more active sites for an electro-catalysis hydrogen evolution reaction; the electroplating alloy in the electroplating alloy catalytic layer contains metal elements with high HER catalytic activity, and the kinetic energy barrier of the hydrogen evolution reaction can be further reduced, so that the overpotential of the hydrogen evolution reaction is reduced.

The invention belongs to the field of water electrolysis materials, and particularly relates to a porous single-crystal multi-element alloy catalyst and preparation and application thereof in HER catalysis, and the preparation method comprises the following steps: obtaining an electrolyte in which metal ions of M1, M2 and M3 are dissolved, placing a carrier in the electrolyte for constant-current electro-deposition treatment, and depositing on the carrier to form an M1-M2-M3 multi-element alloy; wherein M1 comprises at least one of zinc, gallium, indium and tin; m2 comprises at least one of iron, cobalt, nickel, copper, zinc, manganese and chromium; m3 comprises at least one of platinum, gold, silver, palladium and iridium; the total number of types of metal elements of M1, M2 and M3 is three or more; and carrying out transformation treatment on the carrier deposited with the M1-M2-M3 multi-component alloy at the temperature of 450-850 DEG C, and then carrying out modification treatment in alkali liquor, thereby obtaining the catalyst. The material provided by the invention can still show excellent long-cycle stability under acidic and large current conditions.

The invention discloses a NiCu-based alloy catalyst for preparing high-value products through natural gas decarbonization and application of the NiCu-based alloy catalyst, and belongs to the technical field of natural gas high-value catalytic conversion. The preparation method of the NiCu-based alloy catalyst comprises the following steps: (1) adding nickel nitrate hexahydrate and urea into hot water, adding ethylene glycol, carrying out a stirring reaction at 120-150 DEG C, and calcining the obtained intermediate to obtain a nickel oxide precursor; (2) adding a copper nitrate aqueous solution and ammonia water into the nickel oxide precursor, so that copper ions are anchored on the surface of nickel oxide, drying and calcining to obtain a Ni-Cu alloy oxide precursor; and (3) adding the Ni-Cu alloy oxide precursor, bismuth trioxide and metallic tin into deionized water, adding a complexing agent, carrying out ultrasonic treatment, and carrying out H2 reduction calcination on the obtained precipitate to obtain the Ni < x > Cu < y > Bi < z > Snm alloy. The NiCu-based alloy catalyst is used in a natural gas decarburization high-value product preparation reaction, and the natural gas decarburization reaction is sufficient, and long-term efficient conversion and stable operation are achieved by combining the synergistic effect of ultrasonic waves and an alternating magnetic field.

The present invention belongs to the technical field of electrolytic water catalysts and relates to a low-Pt high-entropy alloy electrolytic water catalyst, a preparation method, and an application thereof. Five metal elements, namely, Mn, Ni, Cu, Pt, and any one of La, Mo, Co, V, and Ti, are selected and combined to prepare an efficient and stable high-entropy alloy catalyst. No pH adjustment is required during the process, and the process is simple, easy to operate, and the preparation cost is low, thus enabling industrial production. The MnNiCuPt (La, Mo, Co, V, Ti) high-entropy alloy catalyst prepared by the present invention exhibits excellent electrolytic water performance, thereby reducing the catalyst cost and improving the catalytic performance.