98 results about "Platinum based catalysts" patented technology

The present invention provides a platinum-based catalyst and its preparation method and application, which relates to the technical field of composite catalysts. The platinum-based catalyst includes CeO x Support and composited with the CeO x Pt on the support surface, wherein: the CeO x is a Ce metal coordination unsaturated compound, the CeO x In the structural formula, x is less than 2. The platinum-based catalyst having the above structure has been verified to have high 3-hydroxypropionaldehyde hydrogenation activity and selectivity in the process of hydrogenating 3-hydroxypropionaldehyde to produce 1,3-PDO, while also exhibiting excellent catalytic stability. This effectively addresses the issues of poor catalyst hydrogenation activity and catalytic selectivity in existing 1,3-PDO production processes.

The invention provides a platinum-based catalyst and a preparation method and application thereof, and belongs to the technical field of fuel cells. The preparation method comprises the following steps: mixing a polymer solution, a conductive agent and a zeolite imidazate framework material to obtain an electrostatic spinning solution; carrying out electrostatic spinning on the electrostatic spinning solution, and then carrying out heat treatment to obtain composite nanofibers containing metal nanoparticles or metal oxide nanoparticles; and mixing the composite nanofiber, a platinum source and an organic solvent, and carrying out a reduction reaction to obtain the platinum-based catalyst. According to the preparation method, the polymer solution, the conductive agent and the zeolite imidazate framework material are mixed, and uniform distribution of all the components on the nanoscale can be ensured by virtue of an electrostatic spinning technology, so that a stable and efficient three-phase interface can be formed; the metal nanoparticles or metal oxide nanoparticles obtained by conversion are compounded with platinum particles, so that the catalyst exposes more active sites, and the efficient proceeding of the catalytic reaction is facilitated.

The invention discloses a carbon-coated platinum-based catalyst for a fuel cell and a preparation method thereof, and the preparation method comprises the following steps: dispersing a carbon carrier and a surfactant in a water-alcohol solution to obtain a carbon carrier solution; preparing a platinum-containing precursor solution; the mass of platinum in the platinum-containing precursor is 30-70% of the mass of the carbon carrier; mixing the carbon carrier solution and the platinum-containing precursor solution, and removing the solvent to obtain platinum-loaded carbon carrier particles; immersing the platinum-loaded carbon carrier particles into a weakly alkaline buffer solution, and adding dopamine hydrochloride to form polydopamine to coat the surfaces of the platinum-loaded carbon carrier particles; the reaction product is placed in reducing gas for carbonization treatment, and the carbon-coated platinum-based catalyst is obtained. According to the prepared catalyst, the poisoning effect of sulfonic acid groups of ionomers on Pt is avoided, the problem of large oxygen mass transfer resistance is solved, and stable electric energy output provided by a fuel cell is facilitated.

The invention relates to the technical field of fuel cells, and mainly relates to a graphitized carbon-loaded high-performance platinum-based catalyst and a preparation method thereof. Wherein the graphitized carbon loaded high-performance platinum-based catalyst comprises graphitized carbon and platinum-based nanoparticles with uniform size, and the platinum-based nanoparticles are uniformly dispersed and anchored on the surface of the graphitized carbon; the average particle size of the platinum-based nanoparticles is 3-4 nm, and the particle size distribution range is + / -0.5 nm; the order degree R of the graphitized carbon meets the condition that R = ID / IG = 0.9-1.1; iD is a D peak-to-peak value of the Raman spectrum of graphitized carbon, and IG is a G peak-to-peak value of the Raman spectrum of graphitized carbon; the platinum loading capacity of the graphitized carbon loaded high-performance platinum-based catalyst is 20 to 25 percent; and the geometric standard deviation sigma g of the particle size distribution of the platinum-based nanoparticles is less than 1.12. The graphitized carbon-loaded high-performance platinum-based catalyst provided by the invention has good electrochemical activity, platinum-based nanoparticles are uniformly dispersed on a carbon material with a highly graphitized structure in a nanoscale manner, the platinum-based catalyst has good stability and corrosion resistance, and efficient utilization of the catalyst can be realized.

An addition-curable silicone rubber composition including 100 parts by mass of alkenyl group-containing organopolysiloxane having two or more alkenyl groups bonded to a silicon atom within one molecule; 0.2 to 20 parts by mass of organohydrogenpolysiloxane containing two or more hydrogen atoms bonded to a silicon atom within one molecule; catalytic amount of a platinum-based catalyst; 0.01 to 5.0 parts by mass of thermally-dissociative blocked polyisocyanate; 0.01 to 10.0 parts by mass of a heat resistance-imparting agent; and (F) 0.01 to 10 parts by mass of water. This can provide the addition-curable silicone rubber composition that can produce a cured material having a low compressive set even in high temperature conditions of 200° C. or higher and a silicone rubber cured material.

This invention discloses a platinum-based catalyst for the hydrogenation reaction, its preparation method, and an electrode. The catalyst uses orthorhombic niobium pentoxide (T-Nb₂O₅) as a support to support the active component platinum. The support is resistant to strong acids and electrochemical corrosion at potentials above 1.0 V (vs RHE). The catalyst exhibits a hydrogenation reaction current density of not less than 200 mA·cm⁻¹ at 0.45 V (vs RHE). ‑2 In preparation, ammonium niobate oxalate hydrate was used as the niobium source, and the mixture was gelled via a sol-gel method. The gel was then heat-treated at 600-700℃ to obtain an orthorhombic niobium pentoxide support. The pH was adjusted to less than 3, and platinum was reduced with sodium borohydride to prepare the catalyst. This catalyst was then used to fabricate a hydrogen depolarization anolyte gas diffusion electrode with a platinum loading of 0.5-1.0 mg·cm³. ‑2 It can operate continuously and stably for no less than 120 hours with a cell voltage in the range of 1.25-1.45V. The catalyst of this invention has high activity and excellent stability, and can be used as a hydrogen depolarization anode in hydrometallurgy, significantly reducing electrolysis energy consumption and making it suitable for industrial applications.

The invention relates to an ionic liquid modification method of a hydrogen fuel cell catalyst and slurry and a membrane electrode thereof, and the ionic liquid modification method of the catalyst comprises the following steps: 1) dissolving an ionic liquid used for modification in an alcoholic solution, and carrying out magnetic stirring or ultrasonic dispersion treatment on the alcoholic solution containing the ionic liquid; 2) fully wetting a catalyst to be modified with ultrapure water, and adding the ionic liquid alcohol solution to obtain a catalyst-ionic liquid mixed solution; 3) performing magnetic stirring or ultrasonic treatment on the catalyst-ionic liquid mixed solution; 4) heating and stirring the catalyst mixed liquid in a water bath environment, or carrying out rotary evaporation treatment under a temperature control condition; 5) taking out the treated substance and putting the substance into a vacuum oven for drying treatment to finish catalyst modification; compared with the prior art, the platinum-based catalyst is modified by using the ionic liquid, so that the performance of the catalyst in practical application can be simply, conveniently and efficiently improved, and the cost is reduced.

The invention discloses a dysprosium-doped platinum-based catalyst and a preparation method and application thereof, and belongs to the technical field of battery materials.The preparation method of the dysprosium-doped platinum-based catalyst comprises the following steps that a dysprosium-containing carbon carrier is placed in a first solvent to be subjected to ultrasonic dispersion, and turbid liquid is obtained; adding a soluble platinum salt and a soluble transition metal salt into the turbid liquid, and mixing to obtain a mixed liquid; removing the first solvent in the mixed solution to obtain a solid product; and calcining and etching the solid product to obtain the dysprosium-doped platinum-based catalyst. The dysprosium-containing carbon carrier is adopted to load the platinum-based intermetallic compound, so that dysprosium and the platinum-based nanoparticles can realize relatively strong association and generate interaction among electrons, atom diffusion is further promoted, the crystallinity is improved, and the electronic structure of the platinum nanoparticles is favorably adjusted. The dysprosium-doped platinum-based catalyst is relatively high in internal order degree, and has relatively high activity and stability when being applied to an acidic ORR reaction.

The invention relates to the technical field of electrolytic water platinum-based catalysts, in particular to a preparation method of an electrolytic water platinum-based catalyst, which comprises the following steps: S101, carrier pretreatment: carrying out acid treatment on a carbon carrier to obtain a defect-rich carbon carrier; s102, reacting: mixing an alkali solution, a chloroplatinic acid solution and the treated carbon carrier slurry in proportion, and reacting to obtain a mixed solution of a platinum-carbon catalyst and alcohol; and S103, filtering and drying: filtering the mixed solution of the platinum-carbon catalyst and the alcohol, and drying to obtain the dried platinum-carbon catalyst. The platinum-carbon catalyst prepared by the method has relatively high electrochemical activity, relatively good dispersity and relatively high metal utilization rate.

This invention relates to the field of fuel cell technology, specifically a method for preparing a membrane electrode including an anode catalyst layer that induces water distribution. The method includes the following steps: a water-isopropanol mixture is mixed as a solvent, and a hydrophobically treated platinum-based catalyst and ion exchange resin are added and pre-dispersed to obtain an intermediate slurry; a hydrophilic carbon fiber (CF)-supported anti-reverse electrode agent, IrO2 / CF, is added to the pre-ground slurry for secondary dispersion to obtain a final slurry; the final slurry is coated onto a PTFE substrate and dried to obtain an anode catalyst layer; a commercial catalyst and ion exchange resin are mixed in a water-alcohol solvent, dispersed to obtain a cathode slurry, coated onto a PTFE substrate, and dried to obtain a cathode catalyst layer; the catalyst layer is transferred to both sides of a proton exchange membrane to obtain a membrane electrode. This invention can drive liquid water away from the platinum active region and distribute it in a large-pore hydrophilic region with excellent mass transfer conditions formed by IrO2 / CF, providing liquid water not only for anti-reverse electrode but also preventing damage to the Pt / C electrochemical active region from low-temperature freezing.

To provide a copolymer composition containing an ethylene / α - olefin / non-conjugated polyene copolymer which is excellent in physical properties, processability and the like of a molded article to be obtained, a method for producing the same, a foamed molded article obtained from the copolymer composition and a method for producing the same, and a crosslinked molded article and a method for producing the same.SOLUTION: A copolymer composition containing a copolymer (S) having a structural unit derived from ethylene (A), a structural unit derived from an α - olefin (B) having 3 to 20 carbon atoms, and a structural unit derived from a specific non-conjugated polyene (C) and satisfying requirements (i) and (ii), a hydrosilyl group-containing compound (Y) that is an organohydrogenpolysiloxane having at least one silicon atom-bonded aralkyl group and at least two silicon atom-bonded hydrogen atoms in a molecule, and a platinum-based catalyst for hydrosilyl crosslinking.SELECTED DRAWING: None

The invention provides application of a heterogeneous catalyst in photocatalytic hydrosilylation reaction, and relates to the technical field of hydrosilylation. The heterogeneous catalyst is a supported platinum-based catalyst Pt / MOFs (Metal-Organic Frameworks). The heterogeneous catalyst provided by the invention does not need to be heated during photocatalytic hydrosilylation reaction, can be directly carried out under a visible light source, and is high in raw material conversion rate. In addition, the heterogeneous catalyst provided by the invention can also be recycled.

The invention provides a tin-doped S-1 molecular sieve platinum-based catalyst for preparing olefin through alkane dehydrogenation as well as a preparation method and application of the tin-doped S-1 molecular sieve platinum-based catalyst, the platinum-based catalyst is a Pt-coated Sn-S-1 catalyst, and the Pt-coated Sn-S-1 catalyst comprises a Sn-S-1 molecular sieve framework doped with Sn and Pt packaged in a Sn-S-1 molecular sieve crystal; the Pt content in the Pt (at) Sn-S-1 catalyst is 0.04 to 0.3 wt% and does not include 0.3 wt%; pt in the Pt (at) Sn-S-1 catalyst is dispersed in an atomic scale or a sub-nano cluster. The catalyst provided by the invention is used in the olefin preparation reaction through alkane dehydrogenation, and has excellent alkane conversion rate, olefin selectivity and catalytic stability.

The application belongs to the technical field of nanomaterials and electrocatalysis, and particularly relates to a one-dimensional nanowire structure monatomic alloy catalyst, a preparation method and application. The catalyst comprises a carrier and an active component, the structure of the active component is that Pt is dispersed in the form of monatomic on the surface of a nanowire of a base metal M, the M comprises one or more of Au, Ag, Ru, Pd, Rh, Ir and Os, and the active component is anchored on the carrier. The catalyst has an excellent one-dimensional nanowire structure with outstanding stability, the preparation process is simple, the effective product yield is high, and the prepared platinum-based catalyst material has superior oxygen reduction electrocatalytic performance and stability.

The present invention discloses a fuel cell platinum-based anti-reverse polarity catalyst with a small amount of highly dispersed iridium surface modification, as well as its preparation method and application. The method comprises the following steps: impregnating the platinum-based catalyst with an iridium complex organic solvent, and then subjecting the catalyst to heat treatment under a specific atmosphere to highly disperse the iridium atoms on the surface of the platinum-based catalyst; dissolving the iridium precursor in a mixed solution of water and alcohol, adding a complexing agent, and stirring evenly at room temperature; weighing the platinum-based catalyst, wetting it with deionized water, mixing it with the solution obtained in step one, and ultrasonicating it; transferring the above mixture to a constant temperature water bath, and evaporating the solvent; transferring the material after evaporation of the solvent to a quartz boat, placing it in a tube furnace, and subjecting it to reduction heat treatment under a specific atmosphere to obtain a platinum-based catalyst with a small amount of highly dispersed iridium surface modification. The present invention not only solves the anti-reverse polarity problem of fuel cells, but also significantly reduces the amount of precious metal iridium used, which is of great significance for promoting the large-scale commercialization of fuel cells.

The invention provides a nickel-based alloy composite zinc-nitrogen-carbon material and a preparation method thereof.The preparation method comprises the steps that after zinc salt, a nitrogen-containing organic compound and a solvent are fully stirred and mixed, heating treatment is conducted in the inert atmosphere, and the zinc-nitrogen-carbon material is obtained; and adding nickel salt and molybdenum salt into the zinc-nitrogen-carbon material, and carrying out thermal reduction in an inert atmosphere to obtain the nickel-based alloy composite zinc-nitrogen-carbon material. Compared with a commercial platinum-based catalyst, the nickel-based alloy composite zinc-nitrogen-carbon material has the advantages that the nickel-based alloy and the zinc-nitrogen-carbon material are cheap materials, the cost is greatly reduced, meanwhile, the preparation process is simple, the raw materials are wide in source, and the nickel-based alloy composite zinc-nitrogen-carbon material is suitable for large-scale preparation and application; the nitrogen-carbon nano-porous structure endows the catalyst with high specific surface area and rich attachment sites, so that nickel-molybdenum alloy particles can be highly dispersed on the catalyst, more active sites are exposed, gas can easily participate in the reaction, and the catalytic activity of the hydrogen oxidation reaction is further improved.

The invention relates to a high-durability fuel cell platinum-based catalyst and a preparation method thereof, the fuel cell platinum-based catalyst comprises a platinum-based catalyst and a metal oxide, and the metal oxide covers a part of the surface of the platinum-based catalyst; the metal oxide comprises an indium element. An indium oxide or an indium-containing composite oxide is modified on the surface of the platinum-based catalyst, and the oxide can be stably combined on the surface of the platinum-based catalyst to form epitaxial growth and form an interface site with the platinum catalyst, so that the fuel cell catalytic activity of the platinum catalyst can be promoted. Meanwhile, by controlling the reasonable coverage degree of the metal oxide on the surface of the platinum-based catalyst, the number of active sites exposed by the platinum catalyst is reserved, and the catalytic performance of the oxygen reduction reaction of the cathode of the fuel cell is improved to the maximum extent.

The invention discloses a zinc-doped sub-nano platinum-based catalyst as well as a preparation method and application thereof, and belongs to the technical field of proton exchange membrane fuel cells. The preparation method comprises the following steps: adding a platinum precursor, a transition metal element precursor, a zinc precursor, a small-molecule reducing agent and a catalyst carrier into a container filled with a mixed solvent of benzyl alcohol and ethylene glycol; carrying out uniform ultrasonic treatment on the mixture in an ultrasonic instrument, and then carrying out heating reaction; washing and centrifuging, treating with an acid solution, washing and centrifuging again, and finally drying to obtain the catalyst. The catalyst is uniform in size and uniform in dispersion; the process is simple and efficient; various platinum-based catalysts can be synthesized by changing the molar ratio of platinum to transition metal and the doping amount of zinc; the catalyst shows excellent catalytic performance on a rotating disc electrode and a fuel cell membrane electrode. Zinc elements are doped into platinum metal gaps, the size of nano-particles is reduced through lattice expansion, the Pt electronic structure is optimized, and adsorption of intermediates in the ORR process is weakened.

A ruthenium-based bifunctional fuel cell catalyst, its preparation method and application. The present invention belongs to the field of electrochemistry. The present invention solves the problems of different cathode and anode catalysts in existing fuel cells and the scarcity of bifunctional catalysts. Using glucose as the carbon source, NH4Cl as the N source, and nano-MgO as the template, a porous nitrogen-containing carbon nanosphere encapsulating MgO is obtained by high-temperature pyrolysis reaction under an inert atmosphere, and then the MgO template is removed by pickling to obtain a porous spherical shell-shaped nitrogen-containing carbon nanomaterial. The ruthenium-based bifunctional fuel cell catalyst prepared by the present invention is ruthenium loaded on a nitrogen-containing spherical shell-shaped porous nanocarbon material, having the dual functions of hydrogen oxidation and oxygen reduction. After the ruthenium-based bifunctional fuel cell catalyst is assembled as the cathode and anode catalysts into a hydrogen-oxygen fuel cell, its actual discharge performance is about 70% of that of the platinum-based catalyst, which can effectively replace the platinum catalyst, reduce the cost of fuel cells, and is beneficial to the popularization and use of industrialization.

Provided is a method of producing a fluorosilicone rubber laminate. The method comprises: (1) applying a primer composition onto a substrate, and forming a primer layer on a surface of the substrate; and (2) bringing a fluorosilicone rubber composition into contact with the primer layer, and adhering a fluorosilicone rubber to the primer layer. The fluorosilicone rubber composition comprises a platinum-based catalyst and / or a fluorosiloxane containing a silicon atom-bonded hydrogen atom. The primer composition comprises a platinum-based catalyst or a fluorosiloxane containing a silicon atom-bonded hydrogen atom, however the primer composition does not simultaneously comprise a platinum-based catalyst and a fluorosiloxane containing a silicon atom-bonded hydrogen atom. Either the primer composition or the fluorosilicone rubber composition comprises a platinum-based catalyst or a fluorosiloxane containing a silicon atom-bonded hydrogen atom. A laminate in which a fluorosilicone rubber layer and a base material are favorably adhered to each other can be obtained.

The invention discloses a silicone rubber composition for electrical insulation. The composition is prepared from the following components in parts by mass: 55 to 65 parts of vinyl-terminated polydimethylsiloxane, 8 to 15 parts of polyurethane microcapsules containing 4-cyano-4 '-pentylbiphenyl, 5 to 10 parts of ZrO2 nanoparticles, 5 to 10 parts of aluminum hydroxide, 2 to 4 parts of hydrogen-containing siloxane and 0.01 to 0.03 part of a platinum-based catalyst. The preparation method comprises the steps of filler dispersion, microcapsule and cross-linking agent mixing, coating curing and secondary heat treatment. According to the composition, the thermal expansion coefficient is dynamically regulated and controlled through the liquid crystal microcapsules, a compact carbonized layer is formed in cooperation with ZrO2 and aluminum hydroxide, the tensile strength, flame retardance and low toxicity are remarkably improved, and the composition is suitable for high-voltage cables, transformer insulation and electronic component packaging.

The application discloses a cobalt silicate modified platinum-based catalyst, a preparation method and application, and belongs to the technical field of industrial catalysts. The platinum-based catalyst comprises a carrier, a cobalt silicate modification layer generated in situ on the carrier, and platinum nanoparticles loaded on the cobalt silicate modification layer; the cobalt silicate modification layer is a continuous fibrous structure and is covalently combined with the carrier through Si-O-Co bonds. The cobalt silicate modification layer realizes anchoring and electron transfer of the platinum nanoparticles, makes the platinum in an electron-rich state, weakens adsorption on an alpha, beta-unsaturated aldehyde C=C bond, and strengthens selective adsorption on a C=O bond; when the catalyst is applied to selective hydrogenation of alpha, beta-unsaturated aldehydes, the conversion rate of cinnamyl aldehyde can reach 98.2%, the selectivity of cinnamyl alcohol can reach 92.0%, and the catalyst is suitable for hydrogenation of various alpha, beta-unsaturated aldehydes such as aromatic aldehydes, aliphatic aldehydes and furan aldehydes, and has excellent catalytic activity, selectivity and stability, and good industrial application prospect.

The application belongs to the technical field of catalysts, and provides a one-dimensional platinum-based catalyst, a preparation method and application thereof. The one-dimensional platinum-based catalyst has a nanorod structure and is a platinum-tellurium-bismuth catalyst or a bismuth-doped platinum-tellurium catalyst. The preparation method comprises the following steps: (1) in the presence of a dispersing agent, performing a hydrothermal reaction on a platinum precursor, a tellurium precursor, a bismuth precursor and ascorbic acid in an aqueous solvent to form a platinum-tellurium-bismuth ternary heterogeneous phase alloy; (2) loading the platinum-tellurium-bismuth ternary heterogeneous phase alloy on a carbon material to obtain a platinum-tellurium-bismuth catalyst; optionally, the method further comprises the following step: (3) performing acid treatment on the platinum-tellurium-bismuth catalyst obtained in step (2) to dealloy, thereby obtaining a bismuth-doped platinum-tellurium catalyst. The catalyst exhibits excellent electrocatalytic activity and stability in a formic acid oxidation reaction.

The invention provides a platinum-based catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method of the catalyst comprises the following steps: dispersing an oxide carrier in water, dropwise adding an aqueous solution of a platinum precursor under a stirring condition, and drying to obtain a supported catalyst precursor; dispersing the supported catalyst precursor in a buffer solution, adding dopamine hydrochloride, and stirring to form a polydopamine coating layer; and adding a binder into the catalyst with the formed polydopamine coating layer, and drying and roasting to obtain the platinum-based catalyst. The prepared platinum-based catalyst can be applied to a reaction for synthesizing hydrocyanic acid from CH4 and N2O, efficient conversion can be achieved at the low reaction temperature ranging from 370 DEG C to 450 DEG C, and compared with the condition that the high temperature is 1000 DEG C or above needed by a traditional Andru method, a BMA method and other processes, reaction energy consumption is greatly reduced, and meanwhile effective utilization of N2O is achieved.

The invention relates to the technical field of fireproof silicone rubber materials, in particular to a PDMS-based fireproof composite material and a preparation method and application thereof. The content of ammonium polyphosphate in an ammonium polyphosphate / high-sodium glass powder porcelainizing system is relatively high, so that a platinum catalyst is easily poisoned, and a PDMS (Polydimethylsiloxane)-based composite material which depends on catalytic polymerization of the platinum-based catalyst cannot be smoothly cured. In order to solve the technical problems, the PDMS-based fireproof composite material provided by the invention has the advantages that ammonium polyphosphate is coated with organic silicon and then is added into a polymer matrix, so that the poisoning phenomenon of a platinum catalyst is effectively avoided, and the PDMS-based composite material can be smoothly cured and formed; the obtained modified ammonium polyphosphate organic silicon layer not only can effectively improve the compatibility between ammonium polyphosphate and a polymer matrix, but also can solve the problems that ammonium polyphosphate is easy to absorb moisture and is easy to migrate and separate out from a matrix material, so that the obtained PDMS-based fireproof composite material has good flame retardance and mechanical property stability.

This invention relates to a platinum-based catalyst for the preferential oxidation of CO in a hydrogen-rich atmosphere, its preparation method, and its applications. The method, starting from an interface design perspective, employs a series of synergistic and innovative preparation steps: "selective adsorption with non-polar solvents + controlled pH in-situ anchored hydrolysis + two-step thermal treatment." This successfully solves the technical challenge of traditional methods in constructing a tight, stable, and efficient interface between platinum clusters and iron oxides. The catalyst prepared by this method exhibits high catalytic activity, excellent selectivity, and stability in the preferential oxidation of CO in a hydrogen-rich atmosphere, demonstrating outstanding technological innovation and application value.

To provide a pyrrolidone ring-containing organopolysiloxane which can be easily synthesized by a hydrosilylation reaction in the presence of a platinum-based catalyst, and a method for producing the same.SOLUTION: An organopolysiloxane represented by the following formula (1) (in the formula (1), each R is independently a group selected from an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, and an aralkyl group having 7 to 10 carbon atoms, X is a hydrogen atom or a methyl group, Y is a group represented by the following formula (2), m is a number of 10 to 300, n is a number of 1 to 150, and the bonding order of siloxane units parenthesized by m and n may form a block unit or may be random): SELECTED DRAWING: None

The invention provides a preparation method and application of nitrogen-doped mesoporous carbon, and relates to the technical field of fuel cells, the preparation method of the nitrogen-doped mesoporous carbon comprises the following steps: S1, adding a carbon precursor and a nitrogen precursor into deionized water, and dispersing to obtain a precursor solution; s2, sequentially adding a first additive and a second additive into the precursor solution to form a solution system, then adding carbon nanotubes into the solution system for dispersion, and finally performing heat treatment to obtain the nitrogen-doped mesoporous carbon. According to the preparation method of the nitrogen-doped mesoporous carbon, the used raw materials are simple, the preparation steps and process equipment are simple, and industrial production is easy to realize; the specific surface area, the graphitization degree, the pore volume and the pore diameter of the carbon powder can be optimized and adjusted in situ in the carbon powder forming process through a staged program temperature control process; the platinum-based catalyst prepared from the nitrogen-doped mesoporous carbon greatly improves the carrier durability of the fuel cell, and effectively supports the application of the hydrogen fuel cell on a heavy truck.

An electrode for a fuel cell system is provided. The electrode includes a carbon support. The carbon support includes carbon particles each functionalized with one or more sulfur and oxygen-containing moieties. Platinum-based catalyst particles are disposed on the carbon support. Ionomer is disposed on the carbon support. A weight ratio of the ionomer to the carbon support is about 0.4 or less.

The invention relates to a catalyst for hydrogen production through seawater electrolysis based on a metal ruthenium-doped copper nanowire composite structure and a synthesis method thereof, and belongs to the technical field of catalysis, the catalyst is composed of a copper nanowire skeleton derived from foamy copper and metal ruthenium clusters uniformly distributed on the surface of the copper nanowire skeleton; the method comprises the following steps: placing foamy copper in a solution containing sodium hydroxide and an oxidizing agent to generate a copper hydroxide nanowire; metal ruthenium is introduced by dipping in a solution containing ruthenium salt; and carrying out inert atmosphere heat treatment and electrochemical reduction to obtain the ruthenium-cluster-loaded copper nanowire composite catalyst. The fine regulation and control of the structure and components of the catalyst are realized by adjusting the concentration of the reaction solution, the dipping time and the treatment conditions. The electrocatalyst shows excellent hydrogen evolution activity and long-term stability under the acidic seawater electrolysis condition, the problems that a nickel-based current collector is prone to corrosion in an acidic medium and a traditional platinum-based catalyst is prone to inactivation in natural seawater are effectively solved, and a new technical scheme is provided for efficient and stable seawater electrolysis hydrogen production.