16 results about "Potassium hexachloroplatinate" patented technology

The invention relates to a Pt / Ru / RuO2 heterostructure metal aerogel material and a preparation method thereof. The method is realized through a two-step simple process which comprises the following steps: firstly, reducing ruthenium trichloride and potassium chloroplatinate in an aqueous solution by taking sodium borohydride as a reducing agent to obtain precursor hydrogel; and then the hydrogel is subjected to freeze drying and annealing treatment, and the final product Pt / Ru / RuO2 heterostructure metal aerogel is obtained. According to the preparation strategy, a traditional sodium borohydride reduction method is improved, operation is easy and convenient, consumed time is short, and used drugs are not only non-toxic and harmless, but also extremely low in cost. Performance tests show that the Pt / Ru / RuO2 heterostructure metal aerogel has excellent performance in electro-catalytic hydrogen evolution (HER) and oxygen evolution (OER) reactions: under the high current density of 10 mA. Cm <-2 >, the overpotentials of HER and OER are only 17 mV and 1840 mV respectively; more notably, after continuous testing for 24 hours under the current density, the performance of the material is basically not attenuated, and excellent stability is shown. By virtue of the advantages, the material has a wide application prospect in the field of energy conversion of electrolyzed water and the like.

The invention belongs to the technical field of photocatalytic hydrogen evolution, and discloses preparation and application of a platinum monatomic modified zinc cadmium sulfide catalyst. Aiming at the urgent demand of clean energy under energy crisis and the problems of insufficient efficiency, complex preparation, high cost and the like of the existing photocatalytic hydrogen evolution material, the invention aims to provide a catalyst which is simple and convenient in process, controllable in cost and excellent in hydrogen evolution performance. According to the preparation method, zinc acetate, cadmium chloride, thiourea, polyvinylpyrrolidone, potassium tetrachloroplatinate and a hydrazine hydrate solution are taken as raw materials, and precise modification and stable loading of platinum single atoms on the surface of zinc cadmium sulfide are realized through combination of a hydrothermal synthesis method and a photodeposition technology. The catalyst shows excellent catalytic activity and long-term stability in the field of photocatalytic hydrogen evolution, the hydrogen evolution efficiency can be remarkably improved, an efficient solution is provided for clean energy development, and the application value is wide.

The invention belongs to the technical field of chemical analysis and detection. The invention provides a platinum complex fluorescent probe as well as a preparation method and application thereof in detection of water. The chemical formula of the platinum complex fluorescent probe is C23H16ClN3Pt; the preparation method comprises the following steps: 1, under the protection of argon, mixing terpyridine, potassium tetrachloroplatinate, deionized water and dimethyl sulfoxide in a round-bottom flask, heating, stirring, carrying out reflux reaction, cooling to room temperature, adding concentrated hydrochloric acid, carrying out suction filtration to obtain a precipitate, and drying to obtain Pt-Cl; 2, Pt-Cl, phenylacetylene, cuprous iodide, N, N-dimethylformamide and triethylamine are mixed into a round-bottom flask, then argon is pumped and replaced for multiple times, after a reaction, suction filtration is conducted, precipitates are obtained, washing and drying are conducted, and the catalyst is obtained. The platinum complex fluorescent probe is applied to detection of water and has the advantages of specific selectivity, high sensitivity, wide detection concentration range and the like, so that the detection can better meet the current requirements.

The application provides a preparation method and application of a double-porphyrin-based organic semiconductor photocatalyst. The application belongs to the technical field of photocatalysis, and can realize efficient conversion of coenzyme NADH under weak light without relying on special strong light equipment and rhodium complex electronic mediators. The technical scheme comprises the following steps: (1) dissolving porphyrin A in water to assemble the porphyrin A, and obtaining a porphyrin self-assembly solution A; (2) dissolving porphyrin B in water to obtain a porphyrin solution B; (3) adding the porphyrin solution B into the porphyrin self-assembly solution A to obtain a double-porphyrin assembly solution; and (4) adding a potassium tetrachloroplatinate solution and an electron donor reagent solution into the double-porphyrin assembly solution, and obtaining the double-porphyrin-based organic semiconductor photocatalyst after light irradiation. The double-porphyrin-based organic semiconductor photocatalyst obtained by the application can be used for synthesis of NADH under weak light, and can be used for subsequent photocatalytic reduction of CO2 by coupling with enzymes.

The invention relates to preparation and application of a zinc oxide and cadmium sulfide heterojunction modified by a platinum single atom in the field of photocatalytic hydrogen evolution. The invention aims to provide the heterojunction which is simple and convenient in preparation process and low in cost and has efficient photocatalytic hydrogen evolution performance, so that the photocatalytic hydrogen evolution efficiency is improved, and the urgent demand on clean energy under the current energy crisis is relieved. According to the preparation method, zinc acetate, cadmium chloride, thiourea, polyvinylpyrrolidone, potassium tetrachloroplatinate and sodium borohydride are taken as raw materials, a hydrothermal synthesis method is combined with a photodeposition technology, and the prepared platinum single atom modified zinc oxide and cadmium sulfide heterojunction can be applied to the field of photocatalytic hydrogen evolution and has relatively high catalytic activity and stability.

The invention discloses a silverware surface oxide reducing agent as well as a preparation method and application thereof. The silverware surface oxide reducing agent comprises the following components in parts by weight: 65-89 parts of deionized water, 1-5 parts of tea extract, 2-10 parts of roxburgh rose extract and 0.01-0.05 part of colloidal platinum. According to the reducing agent, dissolved hydrogen molecules, tea extract, roxburgh rose extract and other reducing components are utilized to perform in-situ reduction on potassium chloroplatinate to obtain colloidal platinum, and the defect of difficult dispersion of added nano platinum and other catalysts is avoided. Substances such as silver oxide in color spots on the surface of silverware are solid phases and are difficult to directly reduce by hydrogen, tea polyphenol and an ascorbic acid aqueous solution, and the reducing agent utilizes colloidal platinum as a redox catalyst to adsorb and catalyze reduction components such as hydrogen molecules, tea polyphenol in a tea extract and ascorbic acid in a roxburgh rose extract to oxidize, so that the color spots on the surface of the silverware are reduced. And meanwhile, the released electrons can reduce oxides such as silver oxide in color spots on the surface of the silverware into elemental silver, so that the oxides on the surface of the silverware are effectively reduced.

The invention discloses a preparation method of a JHPt / CNTs catalyst for ammoxidation. The preparation method of the catalyst comprises the following steps: firstly, dissolving potassium chloroplatinate and carbon nanotubes in N, N-dimethylformamide, and carrying out ultrasonic dispersion for 10 minutes to obtain a black uniform suspension; drying the black uniform suspension for 7 hours under the vacuum condition of 100 DEG C to obtain black precursor powder; and fully grinding the dried powder, placing the powder in a graphite plate interlayer, rapidly heating the powder in a vacuum environment at 900 DEG C through a Joule heat device for 7 seconds, and cooling the powder to obtain the black JHPt / CNTs catalyst. The catalyst has good platinum dispersity and loading stability, and the charge transfer efficiency and the catalytic active site exposure degree are remarkably improved; meanwhile, the catalyst shows excellent ammoxidation catalytic performance in an alkaline medium, and has relatively high peak current density, relatively low initial potential and good stability. The method is simple in process, efficient, free of reducing agents and suitable for large-scale production and commercial application.

The invention relates to synthesis and application of a Pt-based MOFs (Metal-Organic Frameworks) electro-catalytic material. Pt nano particles contained in the material are formed by reducing potassium chloroplatinate on synthesized modified UIO-66 containing Co single atoms, and the Co single atoms are anchored by a porphyrin organic ligand with a metal center and calcined to prepare the carbon-based electrocatalyst. The porphyrin organic ligand adopted by the invention is 5, 10, 15, 20-tetra (4-carboxylphenyl) cobalt porphyrin (CoTCPP) which is doped into MOF (UIO-66) to serve as a precursor for preparing the electrocatalyst, and the preparation process is mature and suitable for commercial production. In order to obtain a high-performance hydrogen evolution reaction (HER), an in-situ strategy is adopted to jointly embed Pt nano particles and Co single atoms into an N-doped carbon material to obtain the composite electro-catalytic material (Pt at Co-NC), so that the composite electro-catalytic material has respective advantages and even a synergistic effect, the performance of the composite electro-catalytic material can be comparable to that of commercial Pt / C in the aspect of electro-catalytic hydrogen evolution, and the composite electro-catalytic material is suitable for industrial production.

The invention discloses a preparation method of a low-load precious metal platinum-nickel catalyst and application of the low-load precious metal platinum-nickel catalyst in hydrogen production from natural seawater, and belongs to the technical field of preparation of precious metal nano catalytic materials. According to the catalyst, foamed nickel serves as a carrier and is put into a potassium chloroplatinate solution to be subjected to a hydrothermal reaction, and the low-loading-capacity precious metal platinum-nickel catalyst is obtained. And assembling a flow type electrolytic tank, taking the obtained low-load noble metal platinum-nickel catalyst as a cathode of the flow type electrolytic tank, taking NiFe-LDH as an anode of the flow type electrolytic tank, taking natural seawater as an electrolyte of the cathode, taking a potassium hydroxide solution as an electrolyte of the anode, and carrying out an electro-catalytic reaction. The synthesis strategy of the nickel-based catalyst has the advantages of being easy and convenient to operate, low in cost, environmentally friendly and the like, the adopted raw materials are easy to obtain and accord with the green chemistry principle, the feasibility of large-scale production is achieved, and the nickel-based catalyst has wide application prospects in the fields of clean energy conversion and the like.

The invention relates to the technical field of cobalt hydroxide preparation, in particular to an intelligent preparation process of a cobalt hydroxide nano composite material, which comprises the following steps: weighing cobalt nitrate and polyvinylpyrrolidone, pouring into a mixing container, adding deionized water, and carrying out ultrasonic mixing; collecting the temperature of each moment in each set position and each adjustment interval in the mixing container; determining a first adjustment coefficient of each position in each adjustment interval; determining a temperature change response significant value of each position, obtaining a second adjustment coefficient of each position in each adjustment interval in combination with the first adjustment coefficient, and regulating and controlling the temperature in the ultrasonic mixing process by using a PLC control system; and introducing argon into the solution after ultrasonic mixing, dropwise adding a sodium borohydride solution, adding potassium tetrachloropalladate and potassium tetrachloroplatinate solutions with the same volume, and then carrying out centrifugal separation, washing and drying to obtain the cobalt hydroxide nano composite material. According to the invention, the detection accuracy of the residues on the cleaned surface of the wafer is improved.

The invention discloses an amorphous rare earth metal oxide coupled low-platinum-based catalyst and a preparation method and application thereof.The preparation method comprises the steps that gadolinium chloride and potassium tetrachloroplatinate serve as metal sources, carbon black serves as a carrier, an amorphous Gd2O3 / C nano material is prepared in advance through a wet chemical method and high-temperature oxidation, then physical adsorption is conducted firstly, and then the amorphous Gd2O3 / C nano material is subjected to high-temperature oxidation to prepare the amorphous rare earth metal oxide coupled low-platinum-based catalyst. And loading platinum nano particles on the amorphous Gd2O3 / C nano material in a post-heat treatment manner to obtain the Pt-Gd2O3 / C catalyst material. According to the preparation method disclosed by the invention, the low-load platinum nanoparticles are loaded on the amorphous gadolinium oxide nano-carrier, the adsorption effect of the reaction intermediate of the alkaline hydroxide reaction (HOR) is coordinated and optimized by utilizing the high-activity effect of the platinum nanoparticles and the efficient charge transfer effect of the amorphous gadolinium oxide, and the CO poisoning resistance of the material is improved; and finally, the catalytic activity of the alkaline HOR is improved.

This application relates to the field of cobalt hydroxide preparation technology, specifically to an intelligent preparation process for cobalt hydroxide nanocomposite materials. The process includes: weighing cobalt nitrate and polyvinylpyrrolidone into a mixing container, adding deionized water, and performing ultrasonic mixing; collecting the temperature at each set position and adjustment interval within the mixing container at each time point; determining a first adjustment coefficient for each position within each adjustment interval; determining the significant value of the temperature change response at each position, and combining this with the first adjustment coefficient to obtain a second adjustment coefficient for each position within each adjustment interval; using a PLC control system to regulate the temperature during the ultrasonic mixing process; passing argon gas through the ultrasonically mixed solution, adding sodium borohydride solution, and then adding an equal volume of potassium tetrachloropalladate and potassium tetrachloroplatinate solutions, followed by centrifugation, washing, and drying to obtain the cobalt hydroxide nanocomposite material. This application improves the accuracy of detecting residues on the wafer cleaning surface.

The invention discloses synthesis and application of a bimetallic electro-catalytic hydrogen evolution material. The invention relates to synthesis and application of a bimetallic electro-catalytic hydrogen evolution material. Pt nano particles contained in the material are formed by reducing potassium chloroplatinate on synthesized modified UIO-66 containing Co single atoms, and the Co single atoms are anchored by a porphyrin organic ligand with a metal center and calcined to prepare the carbon-based electrocatalyst. The porphyrin organic ligand adopted by the invention is 5, 10, 15, 20-tetra (4-carboxylphenyl) cobalt porphyrin (CoTCPP) which is doped into MOF (UIO-66) to serve as a precursor for preparing the electrocatalyst, and the preparation process is mature and suitable for commercial production. In order to obtain a high-performance hydrogen evolution reaction (HER), an in-situ strategy is adopted to jointly embed Pt nano particles and Co single atoms into an N-doped carbon material to obtain the composite electro-catalytic material (Pt at Co-NC), so that the composite electro-catalytic material has respective advantages and even a synergistic effect, the performance of the composite electro-catalytic material can be comparable to that of commercial Pt / C in the aspect of electro-catalytic hydrogen evolution, and the composite electro-catalytic material is suitable for industrial production.

The present application relates to the technical field of antitumor drug synthesis, and particularly relates to a metal antitumor drug TTP of platinum complex, and a synthesis method and application thereof, wherein 2-bromopyridine and 5-methyl 2-aldehyde pyridine are used as raw materials, halogen-lithium exchange is carried out by reacting with butyllithium and reacting with bromopyridine, a hydroxyl dipyrrole compound is obtained by anionic attack on pyridine formaldehyde, a carbon-based dipyrrole compound is further prepared by oxidation, bromination is carried out by NBS, condensation is carried out by triphenylphosphine, and complexation is carried out by potassium tetrachloroplatinate, and finally the final product TTP which targets mitochondria is obtained. The present application can inhibit two energy metabolism pathways of mitochondrial oxidative phosphorylation and glycolysis, reduce the overall metabolic level of tumor cells, and finally achieve the purposes of inhibiting tumor cell proliferation and overcoming cell drug resistance. The raw material is cheap and easy to obtain, the structure is novel, the yield is high, the separation and purification operation is simple, mass production is suitable, the product shows good biological activity, and detection shows that the metal antitumor drug TTP has an IC 50 . of 5.17 uM for non-small cell lung cancer A549.

The invention relates to the technical field of precious metal compound preparation, in particular to potassium tetranitroplatinate and a preparation method and application thereof, and the preparation method comprises the following steps: adding a potassium chloride solution into a chloroplatinic acid solution to obtain a yellow potassium chloroplatinate solid; adding water into the potassium chloroplatinate solid for slurrying, and dropwise adding a saturated oxalic acid solution to obtain a potassium chloroplatinite solution; the method comprises the following steps: introducing nitric oxide into a potassium chloroplatinite solution for reaction, and cooling and crystallizing after the solution becomes yellow green from red to obtain a white needle-like crystal which is a potassium tetranitroplatinate crude product; and recrystallizing the potassium tetranitroplatinate crude product to obtain the high-purity potassium tetranitroplatinate crystal. By introducing the nitric oxide gas, the hydrolysis of the potassium tetranitroplatinate can be effectively inhibited, so that hydrolysis products of the potassium tetranitroplatinate are reduced, the purity and the yield of the obtained product are greatly improved, and the problem of inclusion of insoluble substances caused by hydrolysis of the potassium tetranitroplatinate in the reaction process is solved.

The application provides a hydrogen evolution catalyst based on amorphous high-entropy hydroxide loaded platinum cluster synthesized by water thermal method and a preparation method thereof, and belongs to the technical field of electrocatalytic hydrogen production. The catalyst takes foamed nickel-molybdenum as a substrate, is immersed in a nitrate solution containing cobalt, iron and cerium, and is subjected to a hydrothermal reaction while an external uniform magnetic field is applied to synthesize amorphous high-entropy hydroxide, then the high-entropy hydroxide is immersed in a potassium chloroplatinate solution, platinum clusters are loaded on the high-entropy hydroxide, and a Pt-O-M (M=Co, Fe, Ce, Ni, Mo) bridge bond is formed. The obtained electrocatalyst has high hydrogen evolution activity, long-term stability under long-term alkaline high current density, and low platinum loading of the catalyst, so it has low cost and great application potential.