64 results about "Platinum based catalysts" patented technology

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 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 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 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.

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 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.

The invention relates to a nitro continuous fixed bed hydrogenation production process under a platinum-based catalyst, and belongs to the technical field of fine chemical engineering. Placing the carrier in rolling equipment, and spraying a chloroplatinic acid solution; calcining in an air atmosphere, and reducing in a hydrogen atmosphere to obtain a catalyst carrier; dispersing the catalyst carrier in toluene, adding 2-mercaptobenzimidazole and aminoferrocene, and stirring for reaction to obtain a platinum-based catalyst; loading the prepared platinum-based catalyst into a fixed bed reactor with a gas-liquid mixing structure; dissolving nitrobenzene in a solvent to obtain a reaction solution; adding the reaction liquid and hydrogen into a fixed bed reactor through a mixer by virtue of a pump, and carrying out hydrogenation reaction with a platinum-based catalyst; after the reaction is finished, a reaction product is separated and purified to obtain aniline; when the prepared catalyst is used for continuous liquid phase hydrogenation reduction of nitro compounds in a fixed bed, generation of by-products can be effectively reduced, high-purity amino compounds are obtained, and extremely high catalytic efficiency is kept for a long time.

The application discloses a fluorine-containing polybenzimidazole ionomer, a preparation method thereof and a membrane electrode. The main chain of the fluorine-containing polybenzimidazole ionomer is fluorine-containing polybenzimidazole, and the main chain is branched with quaternary ammonium salt side chains, and the structure is shown as formula 1: wherein R is a fluorine-containing alkyl or a fluorine-containing aryl; X represents the length of a linking carbon chain between a quaternary ammonium salt nitrogen atom and an imidazole group nitrogen atom, X = 3-6, and n = 120-240. The ionomer main chain contains fluorine atoms, so that the ionomer has high oxidation stability and certain acid resistance. The long side chain quaternary ammonium salt structure makes the ionomer have high proton conduction capacity. Meanwhile, the polybenzimidazole skeleton has high glass transition temperature and high thermal stability, so that the ionomer can be used as a catalyst binder of a high-temperature proton exchange membrane fuel cell, to assist in building an electrochemical reaction three-phase interface and improving the utilization rate of platinum-based catalyst active sites in the cell. The ionomer can be used for preparing a high-temperature proton exchange membrane fuel cell membrane electrode and applied to the high-temperature proton exchange membrane fuel cell.

The invention discloses a molecular sieve catalyst as well as a preparation method and application thereof, and belongs to the technical field of petrochemical engineering catalysts. The preparation method adopts an etching-modification-confinement integrated strategy, and comprises the following steps: firstly, carrying out controllable etching on a pure silicon Silicalite-1 (S-1) molecular sieve by using a mixed alkali solution of alkali metal hydroxide and ethidene diamine, and in-situ constructing silicon hydroxyl nest defects in a skeleton and remaining atomic-scale dispersed alkali metal; and loading platinum and second metal salt on the etched molecular sieve, drying, calcining and reducing to obtain the final catalyst. The confinement microenvironment is pre-created through the etching step, precise positioning and strong interaction of platinum, second metal and alkali metal are achieved, and the problems that a traditional platinum-based catalyst is difficult in propane initial activation, low in propylene selectivity and poor in stability are effectively solved. The catalyst shows high conversion rate, high selectivity and excellent thermal stability in propane dehydrogenation reaction.

The application 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 imidazolate framework material to obtain an electrostatic spinning solution; electrostatic spinning is performed on the electrostatic spinning solution, and then heat treatment is performed to obtain composite nanofibers containing metal nanoparticles or metal oxide nanoparticles; the composite nanofibers, a platinum source and an organic solvent are mixed to perform a reduction reaction, and the platinum-based catalyst is obtained. The polymer solution, the conductive agent and the zeolite imidazolate framework material are mixed, and the uniform distribution of various components on the nanoscale can be ensured by means of the electrostatic spinning technology, which is beneficial to the formation of a stable and efficient three-phase interface; the metal nanoparticles or the metal oxide nanoparticles obtained by conversion are combined with platinum particles, so that more active sites of the catalyst are exposed, and the efficient performance of the catalytic reaction is promoted.

The invention discloses a preparation method of a platinum-based catalyst for catalytic degradation of short-chain hydrocarbon VOCs (Volatile Organic Compounds), which comprises the following steps: dissolving a cobalt salt precursor and a zirconium salt precursor in a molar ratio of (8-9): 1 in ultrapure water, adding an organic acid solution while stirring, and ensuring that the molar concentration of the organic acid solution is higher than that of a total metal salt solution; stopping stirring after the solution generates a gelatinous substance, raising the temperature to 70-100 DEG C, and drying overnight; grinding the obtained solid material, and roasting in a muffle furnace; after cooling, weighing a certain mass of product, dissolving in a proper amount of ultrapure water, and stirring to obtain a carrier solution; and dropwise adding an active noble metal platinum precursor salt solution into the carrier solution, fully stirring, drying overnight, roasting a sample in the air at 300-400 DEG C for 3-5 hours, cooling, and introducing a mixed gas of hydrogen and nitrogen for reduction. The catalyst prepared by the method is simple in preparation method, has excellent sulfur tolerance, and can catalytically decompose ethane at the temperature of lower than 300 DEG C.

The application discloses a preparation method of a fuel cell gradient hole distribution double-catalyst layer cathode, which comprises the following steps: preparing a diffusion layer; coating outer catalyst layer slurry on the surface of the diffusion layer to obtain an outer catalyst layer; the outer catalyst layer slurry comprises a precious metal platinum carrier-based catalyst, an ionomer and a pore-forming agent; the porosity of the outer catalyst layer is 40%-50%, and the average pore size is 0.5-5 mu m; coating inner catalyst layer slurry on the surface of the outer catalyst layer to obtain an inner catalyst layer; the inner catalyst layer slurry comprises a precious metal platinum carrier-based catalyst, an ionomer and a pore-forming agent; the porosity of the inner catalyst layer is 20%-30%, and the average pore size is 0.05-1 mu m. The application further discloses a fuel cell gradient hole distribution double-catalyst layer cathode obtained by the above method. The application can effectively construct an electrochemical reaction three-phase interface, improve the utilization rate of a precious metal catalyst, and realize controllable preparation of a low-platinum high-efficiency gas diffusion electrode.

The application discloses a kind of anti-sulfur water Pt-based bimetallic CO oxidation catalyst and preparation method thereof, belong to environmental catalytic material technical field.The catalyst prepared by the application uses titanium dioxide as carrier, and adopts impregnation method to load noble metal platinum and adjuvant molybdenum to form bimetallic active component.The catalyst utilizes the regulation effect of Mo species to Pt electronic structure and the competitive adsorption mechanism of sulfur species, effectively solves the problem that traditional single platinum-based catalyst is easily poisoned and inactivated under sulfur-containing and water-containing conditions.Experiments show that the catalyst can still maintain very high CO conversion rate for a long time under harsh working conditions containing high concentration of sulfur dioxide and water vapor, and has excellent anti-sulfur regeneration performance.The catalyst preparation process is simple, and the stability is good, which is suitable for efficient elimination of carbon monoxide in industrial waste gas and motor vehicle exhaust.

The application relates to a preparation method of a platinum-based catalyst for hydrogen isotope catalytic exchange; the graphene oxide of the application has rich oxygen-containing functional groups thereon, which can provide a basis for subsequent directional modification of hydrophilic groups and hydrophobic groups; the graphene carrier is a two-dimensional carrier, which can reduce the influence of reactant diffusion caused by pores as much as possible; based on the advantages of the graphene oxide, hydrophilic amino groups and hydrophobic dioctadecylaminohexafluorobutyl ester are introduced on the graphene surface through aminoization and silanization reactions; the ratio of the hydrophilic groups and the hydrophobic groups is optimized to construct a double-modified graphene carrier with different wettability, and a platinum catalyst is prepared through a liquid-phase photoreduction method; the performance of the double-modified graphene loaded platinum-based catalyst is evaluated by taking liquid-phase catalytic deuterium removal as a model reaction; and the catalyst shows relatively high intrinsic activity, equilibrium exchange efficiency and TOF (turnover frequency) under suitable conditions.

The invention discloses cathode platinum-based catalyst slurry and a preparation method thereof, a membrane electrode and a preparation method thereof, and a PEM electrolytic water electric pile, and belongs to the technical field of hydrogen production by water electrolysis. The cathode platinum-based catalyst slurry comprises a platinum-based catalyst, a small molecular alcohol solvent, heptafluoroisopropyl pentafluoroethyl ketone and perfluorinated sulfonic acid resin, and the small molecular alcohol solvent comprises one or more of methanol, ethanol, ethylene glycol, isopropanol, n-propanol, propylene glycol and glycerol. By adding heptafluoroisopropyl pentafluoroethyl ketone into the slurry, the reaction between platinum and an alcohol solvent can be prevented, and the combustion of a platinum-based catalyst is avoided, so that the stability of the slurry is improved, and the catalyst in the slurry keeps relatively good catalytic activity.

The application belongs to the technical field of catalytic materials, and particularly relates to a method for constructing a supported catalytic material based on a laser ablation technology and application thereof. The method is to treat a suspension liquid containing a catalytic active component and a carrier material or a suspension liquid containing raw materials for preparing the catalytic active component and the carrier material by a liquid-phase laser ablation technology, and to load the catalytic active component on the carrier material by pulse laser irradiation to obtain the supported catalytic material. The supported micro-nano catalytic material prepared based on the technology is a composite micro-nano structure functional material formed by loading a catalytic active component on a non-catalytic active carrier material, and belongs to a multifunctional supported composite catalyst, which has a good overpotential under alkaline and acidic conditions, has a catalytic performance comparable to a platinum-based catalyst, and can be applied in an electrochemical field or an electrocatalysis field.

To provide a catalyst for a fuel cell in which activity and durability of the catalyst are improved by alloying not the whole but only a part of the catalyst for the fuel cell, and to provide a method of manufacturing the same.SOLUTION: According to an aspect of the present invention, there is provided an electrode catalyst for a fuel cell including a platinum-based catalyst, wherein the platinum-based catalyst has a triple core-shell structure, platinum is included in each of a core and a shell layer, and a platinum transition metal alloy is included in an intermediate layer disposed between the core and the shell layer, and a method of preparing the same. The electrode catalyst for a fuel cell according to the present invention has a triple core-shell structure by preparing colloidal platinum particles in a solution and alloying a transition metal on the surface of the catalyst, and the electrode catalyst has excellent dispersibility and durability.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of elemental analysis, and provides an analysis method for determining the content of platinum in a platinum-based catalyst and application. The analysis method comprises the following steps: carrying out heating program parameter setting on thermogravimetric analysis and detection equipment, and testing a platinum-based catalyst sample in the thermogravimetric analysis and detection equipment to obtain a thermogravimetric analysis curve; calculating the mass percentage content of platinum in the platinum-based catalyst sample according to the thermogravimetric analysis curve; wherein the temperature rising program is a staged temperature rising process, and the staged temperature rising process comprises a first staged temperature rising process and a second staged temperature rising process which are sequentially carried out. The analysis method provided by the invention can be used for accurately measuring the loading amount of platinum with the mass percentage content of more than 20% in the platinum-based catalyst, and has good repeatability and stability.