661 results about "Ruthenium" patented technology

The invention discloses a catalyst for hydrogen production through tar steam reforming and a preparation method and application thereof. The catalyst comprises a cobalt-magnesium-aluminum composite spinel carrier and an active component loaded on the cobalt-magnesium-aluminum composite spinel carrier, the active component comprises nickel and at least one metal additive selected from iron, zirconium and ruthenium. The preparation method mainly comprises the following steps: preparing the carrier by adopting a coprecipitation method, loading the active component by adopting an impregnation method, and drying and reducing to obtain the final catalyst. The catalyst is used for tar component steam reforming hydrogen production reaction, especially for treating raw materials containing phenol and water vapor at 600-700 DEG C, tar conversion can be efficiently catalyzed, product gas rich in hydrogen can be generated, hydrogen selectivity is high, and almost no methane is generated. The catalyst has the advantages of high activity, good stability, strong carbon deposition resistance and the like, and is suitable for purification and high-value utilization of biomass pyrolysis tar.

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 discloses a hydrogen energy fuel cell catalyst carrier based on a graphene graft polymer, which is characterized in that two-dimensional graphene is used as a substrate, the surface of the two-dimensional graphene is modified with an oxygen-containing functional group, and a functional polymer branch chain containing nitrogen, sulfur or phosphorus heteroatoms is covalently grafted to form a local three-dimensional network winding structure; the carrier is loaded with platinum, palladium, ruthenium and other metal or alloy nanoparticles, the particle size is 2-8 nm, the loading capacity is 10%-40%, and the particles are anchored to polymer functional sites or reduced in situ to a graphene defect area through coordination. A polymer branch chain has pH responsiveness and can adjust the local proton transmission efficiency; the grafting density is 3-15 grafting points per 100 carbon atoms, so that high dispersion and stable anchoring of metal particles are effectively realized; the specific surface area of the carrier is 400-800m < 2 > / g, the electrochemical active area is not less than 80m < 2 > / g, and the activity retention rate is greater than 80% after 5000 circles of accelerated durability tests. The activity, the stability and the proton conduction performance of the catalyst are remarkably improved, and the catalyst is suitable for high-performance fuel cells.

The invention relates to the technical field of biological aviation kerosene, and discloses a process for preparing biological aviation kerosene from waste grease. The method comprises the following steps: introducing waste oil into a hydrofining reactor, introducing hydrogen, carrying out a hydrodeoxygenation reaction under the catalysis of a hydrogenation catalyst, carrying out a reaction on the obtained hydrodeoxygenated oil in an isomerization pour point depressing reactor, and finally carrying out isomerization hot high-pressure separation treatment, isomerization cold high-pressure separation treatment and rectification tower segmentation to obtain the biological aviation kerosene. The specific surface area of a carbon matrix of the hydrogenation catalyst is large, the void structure is rich, a large number of Ni-Mo-P active catalytic centers can be exposed, precious metals such as platinum and ruthenium do not need to be added, the hydrodeoxygenation reaction efficiency of waste oil and fat is remarkably improved, the mass fraction of branched paraffin and cycloparaffin in biological aviation fuel is high, and the combustion performance is better.

The invention provides a ruthenium-based carbon dioxide hydrogenation catalyst based on MoS2 as well as a preparation method and application of the ruthenium-based carbon dioxide hydrogenation catalyst. The carbon dioxide hydrogenation catalyst comprises silicon dioxide, ruthenium and molybdenum disulfide, and the ruthenium and the molybdenum disulfide are loaded on the silicon dioxide. Therefore, in the carbon dioxide hydrogenation catalyst, the molybdenum disulfide is used as an auxiliary agent, so that the generation of methane (CH4) can be remarkably inhibited while a high CO2 conversion rate is maintained, the reversion of a product from CH4 leading to carbon monoxide (CO) leading is realized, and the inherent core defects that an existing Ru-based CO2 hydrogenation catalyst is too high in methanation activity, low in CO selectivity and difficult to consider activity-selectivity at the same time are overcome.

The invention relates to the technical field of magnetron sputtering, and provides a preparation method of a ruthenium sputtering target material. The method comprises the following steps: sequentially carrying out hydrogen introduction reduction treatment, crushing and sieving on ruthenium powder to obtain reduced ruthenium powder; and the reduced ruthenium powder is sequentially subjected to compression molding, cold isostatic pressing treatment and sintering treatment, and the ruthenium sputtering target material is obtained. According to the method, the technical problems that the ruthenium sputtering target material is high in oxygen content and random in grain orientation in a traditional powder metallurgy process are effectively solved by combining a dual deoxidization mechanism of'hydrogen feeding reduction-hydrogen sintering 'and cooperative regulation and control of cold isostatic pressing treatment and sintering process parameters. Results of the embodiment show that the ruthenium sputtering target material prepared by the method can realize the following performance indexes: the purity is greater than or equal to 99.95%, the oxygen content is less than or equal to 20 ppm, the average grain size is less than or equal to 2 microns, the density is greater than or equal to 99%, the required specific crystallographic orientation can be stably formed, and a foundation is laid for subsequent magnetron sputtering preparation of a high-performance film.

The invention relates to the field of preparation of nano materials, in particular to a preparation method of a metal-oxide cluster electro-catalytic material based on an ammonia-mediated electrostatic adsorption principle, and aims to solve the problem that a metal-oxide cluster heterogeneous interface is difficult to accurately construct by an existing method. The preparation method comprises the following steps: dispersing a carbon carrier, a soluble inorganic compound containing platinum, ruthenium and rhodium, a soluble metal complex anion salt and dopamine hydrochloride in a water-alcohol mixed solution, adding ammonia water, and preparing a metal-oxide heterogeneous cluster precursor through an ammonia-mediated electrostatic adsorption effect; and pyrolyzing the precursor in a reducing atmosphere to prepare the metal-oxide cluster electro-catalytic material. The prepared electro-catalytic material has a definite heterogeneous cluster interface and has excellent performance in alkaline hydroxide reaction. The method is simple and convenient to operate, low in cost and low in energy consumption, can be popularized to various metal-oxide cluster electro-catalytic materials, and has application potential.

The invention is suitable for the technical field of water electrolysis hydrogen production, and provides an alkyne-rich carbon-ruthenium nickel alloy catalyst and a preparation method and application thereof. The preparation method comprises the following steps: simultaneously adding a ruthenium salt solution, a nickel salt solution and an organic molecule solution into an alkyne-enriched carbon dispersion liquid for reaction; and carrying out centrifugation, cleaning and vacuum drying treatment on the reacted mixed solution to obtain the alkyne-rich carbon-ruthenium nickel alloy catalyst. According to the invention, the acetylene-rich carbon-ruthenium nickel alloy catalyst uniformly loaded with ruthenium nickel (RuNi) clusters is successfully prepared. In the performance evaluation of hydrogen production by water electrolysis in a simulated seawater environment, the material shows excellent hydrogen evolution activity as a cathode catalyst. Experimental results show that under the applied potential of-0.6 V (relative to a reversible hydrogen electrode, RHE), the absolute value of the current density can reach 0.847 A cm <-2 > to 0.896 A cm <-2 >. The invention provides a feasible material solution for developing a high-performance water electrolysis hydrogen production catalyst suitable for a complex water quality environment.

The invention relates to the field of efficient integrated assemblies of PEM water electrolysis hydrogen production systems, and discloses an efficient integrated assembly for a PEM exchange membrane water electrolysis hydrogen production system, an anode electrode unit in the integrated assembly comprises a ruthenium-based high-entropy metal oxide electrocatalyst, and the ruthenium-based high-entropy metal oxide electrocatalyst comprises ruthenium, tin, manganese, chromium and tantalum elements; the preparation method of the ruthenium-based high-entropy metal oxide electrocatalyst comprises the following steps: grinding solid inorganic ruthenium salt, tin salt, manganese salt, chromium salt, tantalum salt and sodium chloride to obtain a metal salt mixture; carrying out ball milling to obtain a high-entropy metal oxide precursor; and carrying out heat treatment and water washing treatment on the precursor to obtain the ruthenium-based high-entropy metal oxide electrocatalyst. The invention also discloses application of the electrocatalyst in water electrolysis oxygen evolution reaction in an acid solution and water electrolysis hydrogen production reaction of a PEM proton exchange membrane, and the electrocatalyst shows excellent electrocatalytic activity.

The invention provides a composite hydrogen transfer catalyst based on an MOFs material as well as a preparation method and application of the composite hydrogen transfer catalyst. The composite hydrogen transfer catalyst comprises the MOFs material loaded with an active metal component and solid alkali, the active metal component is selected from at least one of palladium, platinum, ruthenium, rhodium and nickel; the active metal component accounts for 0.5-5% of the mass of the catalyst; the MOFs material is selected from at least one of ZIF-8, MIL-101, UiO-66, HKUST-1 and MOF-5 (Metal Organic Frameworks); the solid alkali is selected from at least one of magnesium oxide, calcium oxide, hydroxyapatite and barium oxide. The catalyst provided by the invention has the advantages of high catalytic activity, good selectivity, strong stability, reusability and the like, can efficiently catalyze fatty alcohol to perform hydrogen transfer reaction under a lower-temperature reaction condition to prepare Guerbet alcohol, remarkably improves the yield and purity of a product, and reduces the reaction energy consumption and cost.

The invention belongs to the technical field of preparation of electrocatalytic oxygen evolution catalysts, and particularly discloses a doping regulation type ruthenium-iridium-based electrocatalytic oxygen evolution catalyst and a preparation method thereof.The preparation method comprises the following steps that S1, ruthenium salt, iridium salt and doped metal salt are dispersed in a solvent, the doped metal salt is selected from one or more of yttrium salt, strontium salt, potassium salt, calcium salt, magnesium salt, scandium salt, gallium salt and aluminum salt; s2, preparing a precursor mixture; s3, performing heat treatment to obtain a solid product; and S4, washing and drying to obtain the metal element doped ruthenium-iridium-based electro-catalytic oxygen evolution catalyst. According to the doping regulation type ruthenium-iridium-based electro-catalysis oxygen evolution catalyst and the preparation method thereof, the process is simple, the universality is high, doping of multiple elements can be achieved only by replacing the doped metal salt, and the obtained catalyst has excellent acidic water electrolysis oxygen evolution activity and long circulation stability; and excessive phase splitting of the Y element and excessive lattice distortion of other elements can be avoided.

The invention relates to the technical field of preparation of electro-catalysis electrode materials, in particular to a preparation method and application of a SeO2 doped RuO2 electrolyzed water catalyst.The preparation method comprises the steps that S1, ruthenium acetate and selenium dioxide are dissolved in deionized water together and continuously stirred to obtain a mixed solution A, then sodium citrate is dissolved in deionized water, and the PH value is adjusted to be 9 with ammonia water to obtain a solution B; s2, mixing the solution A and the solution B, reacting at 80 DEG C for 12 hours, naturally cooling, ultrasonically washing with deionized water and ethanol in sequence, centrifuging, and drying in a drying oven to obtain a catalyst precursor; and S3, carrying out two-step pyrolysis on the precursor, namely heating to 250 DEG C, annealing for 4 hours, heating to 400 DEG C, annealing and heating for 2 hours, so as to obtain the SeO2-doped RuO2 nanosheet. By introducing a proper amount of SeO2 for doping, the electronic structure of RuO2 is optimized, the adsorption and desorption balance effect of the catalyst on a reaction intermediate is adjusted, the Ru site catalytic performance is improved, and the obtained SeO2-doped RuO2 nanosheet has efficient acidic OER catalytic performance.

The invention relates to a RuO2-Co3O4 electro-catalytic material as well as a preparation method and application thereof. The electro-catalytic material comprises a carbon cloth substrate and a nanosheet array growing on the surface of a carbon cloth fiber, the nanosheet comprises a heterostructure which is composed of crystalline state Co3O4 particles and amorphous state RuO2. The preparation method comprises the following steps: taking activated carbon cloth as a working electrode, performing constant-potential electrodeposition in electrolyte containing cobalt salt, and then cleaning and drying to obtain Co (OH) 2 loaded carbon cloth; carrying out heat treatment on the carbon cloth for the first time to obtain carbon cloth loaded with Co3O4 nanosheets; then immersing the carbon cloth into a solution containing ruthenium salt to enable the ruthenium salt to be adsorbed on the Co3O4 nanosheet, and then cleaning and drying to obtain a precursor; and carrying out second heat treatment on the precursor to obtain the RuO2-Co3O4 heterojunction electro-catalytic material. The RuO2-Co3O4 electrocatalyst has the advantages that the RuO2-Co3O4 electrocatalyst has excellent electrocatalytic oxygen evolution activity and long-time operation stability. The preparation process is simple, the thickness of the catalyst layer can be controlled, and the process operation complexity and the requirement on equipment are reduced.

The application discloses a kind of ruthenium grafting manganese aluminum hydrotalcite and catalytic method for C02 hydrogenation preparation formic acid, belong to catalyst technical field, in the application, under the optimized reaction condition, with methanol:water mixture as solvent (5:1), total pressure is 60bar, 60 DEG C, reaction 24 hours, with temperature controller to be heated to the temperature required for reactor.When the temperature inside the reactor reaches the specified temperature, start stirring at a fixed stirring speed (200-800 revolutions / min), after the required reaction time, stop stirring and heating, and allow the reactor to cool to room temperature. The hydrogenation products were analyzed by high performance liquid chromatography, the conversion number (TON) of formic acid reached more than 8000; RuMnAl-LDH was prepared by coprecipitation method, and RuMnAl hydrotalcite catalyst was obtained by heating and activation in a muffle furnace. The preparation process is simple, and the raw materials are easy to obtain. The RuMnAl-LDH catalyst prepared by the application has good catalytic activity and stability in the catalytic hydrogenation of formic acid to formic acid reaction, and has wide application prospect.

The invention discloses an integral reactor for ammonia synthesis, and relates to the technical field of ammonia synthesis equipment. The reactor comprises catalyst layers, heat exchange layers and interlayer sealing structures, wherein the catalyst layers and the heat exchange layers are alternately stacked. The catalyst layer adopts a honeycomb integral ruthenium-based catalyst with porosity greater than or equal to 70%, the cross section of a pore channel is a regular hexagon, and the diameter is 1-5mm; the heat exchange layer is provided with a matched pore channel structure and is made of a metal material with the heat conductivity coefficient larger than or equal to 16 W / (m.K), and a corrugated micro-channel network is arranged in the heat exchange layer. And the interlayer sealing structure comprises a nickel foil gasket and an annular hoop. Fresh feed gas enters from the first gas inlet of the heat exchange layer for preheating and enters the catalyst layer for reaction through the first gas outlet, a reaction product is cooled through the adjacent heat exchange layer and then is discharged through the second gas outlet, and reaction-heat exchange deep coupling is achieved. The catalyst utilization rate is increased to 85% or above, the axial temperature difference of the bed is smaller than or equal to 15 DEG C, the radial temperature difference is smaller than or equal to 10 DEG C, the flow fluctuation response time is shortened to be within 10 minutes, the energy consumption is reduced by 12% under the low-pressure condition of 3-5 MPa, and the method is particularly suitable for distributed green ammonia production.

The application discloses a preparation method of a low-TCR low-cost ceramic heating tube, and comprises the following steps: (1) preparing an organic carrier: 60 parts by weight of terpineol, 20 parts by weight of ethyl cellulose, 10 parts by weight of a binder and 10 parts by weight of diethylene glycol acetate are placed into a magnetic stirrer and uniformly dissolved and mixed; (2) weighing metal powder: Mo: 50-70 parts by weight; Re: 20-30 parts by weight; Mn: 0-5 parts by weight; Cr: 10-15 parts by weight; by adopting Mo, Re, Mn and Cr in a specific ratio as the metal powder, the traditional mode of adopting metal ruthenium powder or a mixture of metal ruthenium powder and other common metal powder is replaced, the prices of Mo, Re, Mn and Cr are low, so that the preparation cost of the ceramic heating tube is effectively reduced, the purpose of low TCR is achieved, and the scale production is facilitated; meanwhile, the ceramic heating tube prepared by adopting the application has higher overall bending strength, and can better meet the use requirement.

A process for producing amines by reductive amination, the process includes introducing a feed stream, the feed stream comprising an amino alcohol and a reducing agent, and hydrogen in a reaction zone of a reactor, and contacting the feed stream with a catalyst in the reaction zone. A hydrogen flow rate into the reaction zone is adjusted, and a product stream comprising ethyleneamines is extracted. The catalyst includes a carrier component selected from alumina, silica, and combinations thereof; and an active component having a first metal, a second metal, and a third metal. The first metal is selected from cobalt, nickel, and copper, the second metal is selected from rhenium, ruthenium, chromium, zinc, sodium, calcium, magnesium, strontium, lithium, potassium, barium, cesium, lanthanum, tungsten, iron, silver, titanium, manganese, aluminum, rhodium, platinum, palladium, iridium, and combinations thereof, and the third metal is niobium.

The present disclosure describes a method for the planarization of ruthenium metal layers in conductive structures. The method includes forming a first conductive structure on a second conductive structure, where forming the first conductive structure includes forming openings in a dielectric layer disposed on the second conductive structure and depositing a ruthenium metal in the openings to overfill the openings. The formation of the first conductive structure includes doping the ruthenium metal and polishing the doped ruthenium metal to form the first conductive structure.

This invention relates to the field of functional materials technology, and discloses a ruthenium-based catalyst for the acidic oxygen evolution reaction (OER), its preparation method, and its application. The preparation method includes dissolving 100-200 parts by mass of RuCl3·H2O and 1-40 parts by mass of VCl3 in 20-60 parts by volume of anhydrous methanol, stirring to obtain a mixed solution; slowly adding hydrazine hydrate dropwise to the mixed solution, continuing stirring, centrifuging and filtering; washing alternately with anhydrous methanol and ultrapure water, freeze-drying, and heat-treating at 300-500℃ for 1-4 hours to obtain a V-doped RuO2 catalyst. The prepared V-RuO2 catalyst exhibits excellent initial activity and long-term durability under acidic conditions, providing a new solution for developing high-performance anode catalysts suitable for proton exchange membrane water electrolyzers.

The invention discloses an anode CO poisoning resistant catalyst and a preparation method thereof. The preparation method comprises the following steps: step 1, preparation of a nitrogen-doped carbon carrier: dispersing carbon black in a concentrated nitric acid solution for hydrothermal reaction; and after the reaction is finished, washing and drying the precipitate, and carrying out heat treatment in an ammonia gas atmosphere to obtain the nitrogen-doped carbon carrier. Step 2, preparation of a catalyst precursor: dispersing the nitrogen-doped carbon carrier in water, adding a platinum precursor and a ruthenium precursor, uniformly mixing, and drying to obtain the catalyst precursor; and step 3, preparation of the anti-anode CO poisoning catalyst: placing the catalyst precursor in a reducing atmosphere for rapid thermal reduction, and cooling to obtain the anti-anode CO poisoning catalyst. Carbon black is modified through concentrated nitric acid and ammonia gas, the carbon carrier uniformly loaded with nitrogen active sites is obtained, and a basis is provided for subsequent uniform distribution of Pt-Ru particles on the C carrier.

The invention discloses a cerium oxide carrier loaded ruthenium-gadolinium bimetallic heterogeneous catalyst and a preparation method and application thereof, the heterogeneous catalyst takes a cerium oxide nanorod as a carrier, and metal ruthenium and metal gadolinium are loaded on the carrier; wherein the loading capacity of the metal ruthenium and the loading capacity of the metal gadolinium are independently larger than 0 and smaller than or equal to 10 wt%. The cerium oxide loaded ruthenium-gadolinium bimetallic catalyst provided by the invention can improve the catalytic activity and selectivity of ester prepared by an olefin esterification one-step method, ester compounds can be synthesized at a relatively high yield, and the ester selectivity of 99% or more is obtained. Besides, the cerium-loaded ruthenium-gadolinium heterogeneous catalyst prepared by the method is easy to separate from reactants and products and can be repeatedly used, and a new technology suitable for industrialization is provided for ester preparation through esterification of olefin compounds under efficient and selective mild conditions.

Provided is a reflective mask blank including a substrate, a multilayer reflective film, a protective film, and a light absorbing film having a phase shift function. The light-absorbing film contains ruthenium, tantalum, and nitrogen and does not contain oxygen, and has a ruthenium content of 80 to 90 at%, a tantalum content of 5 to 15% by amount, a nitrogen content of not more than 10 at%, a thickness of 38 to 50 nm, and a reflectance of 10 to 14% and a phase shift of 205 to 225 degrees with respect to exposure light that is light in the extreme ultraviolet range.

The invention discloses a ruthenium-based ammonia synthesis catalyst, a preparation method thereof and application of the ruthenium-based ammonia synthesis catalyst in catalytic synthesis of ammonia. The ruthenium-based ammonia synthesis catalyst comprises a high-entropy oxide carrier and a ruthenium active component loaded on the carrier, the high-entropy oxide is a single solid solution phase formed by oxides of at least three of Mg, Ca, Sr and Ba and oxides of at least two of La, Ce, Pr, Nd and Sm. The preparation method comprises the following steps: mixing soluble salts corresponding to metals forming the high-entropy oxide with an organic foaming agent in water, evaporating and concentrating to form gel, and carrying out heat treatment at 110-150 DEG C to foam the gel to obtain a porous fluffy solid precursor; grinding the solid precursor, carrying out Joule heating treatment in a non-oxidizing atmosphere, instantly heating the solid precursor to 600-1200 DEG C within 10 seconds, carrying out heat preservation for 1-10 seconds, and then cooling to obtain a high-entropy oxide carrier; and loading a ruthenium active component on the high-entropy oxide carrier to obtain the ruthenium-based ammonia synthesis catalyst.

The invention provides a catalyst for maleic acid water phase hydrogenation as well as a preparation method and application thereof. The catalyst comprises a carrier, an active metal component and a nitrogen-doped carbon layer, wherein the nitrogen-doped carbon layer is formed by shrinking and carbonizing melamine and formaldehyde in pores of the carrier loaded with the active metal component, and the active metal component is coated with the nitrogen-doped carbon layer; the active metal component is selected from at least one of palladium, ruthenium, gold, rhodium and iridium, and the carrier is a spherical or granular porous material. The catalyst disclosed by the invention comprises the nitrogen-doped carbon layer formed by shrinking melamine and formaldehyde in pores of the carrier loaded with the active metal components and carbonizing, so that the active metal components of specific types can be promoted to be uniformly dispersed in the catalyst structure, and the catalytic performance is improved; meanwhile, by combining the effect of the carrier, the mechanical strength of the catalyst is effectively improved, so that the catalyst can still maintain high activity after being used in an acid environment for a long time, and the maleic acid water-phase hydrogenation reaction can be efficiently catalyzed in a long-life manner.

The invention relates to the technical field of electro-catalysis, in particular to a metal monatomic doped copper-based catalyst and a preparation method and application thereof. The metal single atoms in the catalyst are selected from palladium single atoms, iron single atoms, nickel single atoms or ruthenium single atoms; the doping amount of the metal single atoms is 0.5%-1.0% on the basis of the total mass of the catalyst. The invention provides a novel metal monatomic doped copper-based catalyst, which can be used for catalyzing the reduction of a harmful substance nitrite into a chemical ammonia with an economic added value by using renewable electric power, can solve the problems of nitrite pollution and environment and energy caused by ammonia production by a Have-Bosch method, and realizes the purpose of turning waste into wealth.

The invention belongs to the technical field of electrolyzed water materials, and discloses a preparation method and application of a precursor for preparing a catalyst and a preparation method and application of the catalyst. According to the precursor, hydrogen atoms on hydroxyl in cyclodextrin molecules are substituted by R groups, polyphenol structures in the R groups and metal ruthenium form a coordination structure, and the number of the R groups in the cyclodextrin molecules is 1-7. According to the precursor for preparing the ruthenium-based catalyst, the ruthenium-based catalyst and the preparation method and application of the ruthenium-based catalyst, the coordination environment of Ru in the precursor is regulated and controlled, and a hydrogen evolution catalyst obtained after pyrolysis of the prepared precursor has high HER activity and stable performance.

The invention discloses a preparation method of a catalyst for preparing cyclohexene through benzene hydrogenation, and belongs to the technical field of catalyst preparation. Comprising the following steps: dropwise adding a metal salt solution containing ruthenium salt and zinc salt and a precipitant solution into an alcohol solution at the same time, and carrying out a co-precipitation reaction; carrying out in-situ reduction on a solid product obtained by the coprecipitation reaction; a product obtained after in-situ reduction is put into alkali liquor to be stirred; according to the method, the alcoholic solution is used as a coprecipitation reaction medium, does not participate in the reaction, but can adjust the microenvironment of the reaction medium, so that the microenvironment fluctuation of the solution in the precipitation process is relatively small; the catalyst with relatively uniform precipitation can be obtained, so that the activity of the prepared Ru-Zn catalyst can be improved; the problems of single precipitation process, insufficient catalyst structure uniformity, poor preparation reproducibility and the like of a traditional water phase coprecipitation method are solved; the catalyst is applied to a reaction for generating cyclohexene through selective hydrogenation of benzene.

The invention discloses a surface ruthenium-nitrogen coordinated Ru nano-particle catalyst, a preparation method and application of the surface ruthenium-nitrogen coordinated Ru nano-particle catalyst in bisphenol A hydrogenation reaction. Ruthenium acetylacetonate and a nitrogen-containing ligand form a porous precursor by adopting a sol-gel method, and then the porous precursor is subjected to inert gas pyrolysis and H2 / NH3 activation treatment. In an XPS (X-ray polystyrene) N1s spectrogram of the prepared Ru nano-particle catalyst, Ru-N coordination nitrogen at 399.0-399.5 eV accounts for 30%-60% of the total nitrogen atom. When the catalyst is applied to bisphenol A hydrogenation reaction, the sulfur content of the raw material is less than 100ppm, and the yield of hydrogenated bisphenol A can reach 94%; the attenuation is less than 5% after 5 cycles, and the sulfur adsorption capacity of the Ru nano-particle catalyst is less than 0.1 wt%. The surface ruthenium-nitrogen coordinated Ru nano-particle catalyst is high in activity, good in selectivity and excellent in sulfur tolerance, can stably play a role in a sulfur-containing environment, is simple and controllable in preparation process, and is beneficial to industrial production.

This invention discloses an upflow electrochemical treatment device and method for treating wastewater containing hexavalent chromium. The device includes a cylindrical inner reaction chamber and a double-layer reaction chamber. The inner reaction chamber contains a mesh-like ruthenium-iridium-titanium anode and a carbon fiber felt membrane cathode. The double-layer reaction chamber includes an external overflow chamber and an internal upflow chamber. The method includes the following steps: S1, preliminary preparation; S2, wastewater injection; S3, continuous wastewater treatment; S4, detection. This invention mainly uses an upflow electrochemical water purification membrane for wastewater treatment, which can efficiently reduce highly toxic hexavalent chromium to less toxic trivalent chromium, effectively reducing the toxicity of the wastewater. Simultaneously, it utilizes the oxygen released during the reduction of hexavalent chromium to achieve the simultaneous generation of hydrogen peroxide, improving resource utilization and reducing treatment costs.

A material includes sulfur, and a quantum dot component. The quantum dot component is at least one component selected from the group consisting of: a quantum dot-nanotube composite, a quantum dot-graphene composite, carbon quantum dots consisting essentially of carbon, and hybrid quantum dots comprising carbon and at least one metal oxide. Another material includes sulfur, a carbon quantum dot composite material and an electrically conductive component. The carbon quantum dot composite material includes a carbon source, carbon nanotubes and at least one metal and / or metalloid selected from the group consisting of tungsten, molybdenum, ruthenium, niobium, tantalum, germanium, iron, silver, manganese, titanium, tin, antimony, bismuth, gold, silicon, nickel, cobalt, chromium, zirconium, and vanadium; or oxide thereof; and combinations thereof. The material may be used in a lithium-sulfur battery. This may overcome or partially overcome the shuttle effect.