49 results about "Formic acid oxidation" patented technology

The invention relates to a kind of recycling method of tere phthalic acid (TPA) oxidizing residue. The invention uses the processes such as twice methyl ester reaction, rectification for separating, recrystallization for refining, interesterification reaction, and so on, to recycle tere phthalic acid (TPA), M-phthalic acid, and benzoic acid in petroleum chemical industry production residue. The invention solves problems such as low recycling ratio and more impurity of the product and so on in existing technique. The method is mainly used in recycling of tere phthalic acid (TPA) oxidizing residue.

The invention relates to a method for preparing Au / g-C3N4 composite-type micro-nano material. The method is realized by steps of adding g-C3N4 powder in 400-900nano in granularity to chloroauric acid solution, ultrasonically dispersing the g-C3N4 powder so as to prepare turbid liquid; heating the turbid liquid in water bath; then, adding sodium citrate to solution, stirring, washing, separating and drying a mixture so as to obtain Au / g-C3N4 composite-type micro-nano material; the Au / g-C3N4 composite-type micro-nano material has excellent photochemical catalysis effect to formic acid oxidation; and oxidation potential is negatively shifted by 800mV (close to the catalytic oxidation potential of Pt) without ctalyst poisoning phenomenon. According to the advantages of the invention, acquired composite material particles are even and not united; a preparation method is simple; and cost is relatively low.

The invention discloses a supported palladium catalyst and a preparation method and application thereof. The supported palladium catalyst disclosed by the invention comprises a graphene carrier and palladium nano-crystals or palladium nano-alloys supported on the carrier, wherein the palladium nano-crystals or palladium nano-alloys account for 10-50 mass percent. The preparation method comprises the following steps: (1) dissolving palladium salt in oleylamine to obtain a palladium salt solution, or dissolving cobalt salt or nickel salt and palladium salt in oleylamine to obtain a mixed solution; (2) adding a boron-nitrogen compound into the palladium salt solution or the mixed solution, and adding an organic settling agent, thereby obtaining the palladium nano-crystals or palladium nano-alloys; and (3) supporting the palladium nano-crystals or palladium nano-alloys on graphene, thereby obtaining the supported palladium catalyst. The supported palladium catalyst and the preparation method disclosed by the invention have the advantages that the preparation method is low in reaction temperature and is simple and convenient, and the shape and size of the palladium catalyst can be controlled. Moreover, the active ingredients of the supported palladium catalyst disclosed by the invention are uniform in size and high in dispersity, and the catalyst is high in activity and can be used for catalyzing formic acid oxidation.

High-quality bimetallic PtxCu100-x (x=54-80 at. %) nanocubes can be prepared from a hot organic solution. Synthetic conditions, such as the ratio of oleylamine / tetraoctylammonium bromide as well as the doses of 1-dodecanethiol and 1,2-tetradecanediol have been optimized to ensure a formation of Pt—Cu nanocubes. Electrochemical evaluation shows that the catalytic activity of Pt60Cu40 nanocubes for methanol oxidation is superior, in comparison with those of spherical Pt60Cu40 nanocubes and Pt nanocubes with similar sizes, implying that the {100}-terminated Pt60Cu40 nanocubes offer a higher activity for methanol oxidation reaction than those with mixed crystallographic facets do. As another example, it was identified that Pt80Cu20 nanocubes is the best electrocatalyst on the basis of the maintainable electrocatalytic activity (which is even slightly superior to that of pure Pt nanocubes) and remarkable long-term stability (˜300 hours vs 3 hours for Pt nanocubes) when being performed towards formic acid oxidation reaction.

The invention relates to a three-dimensional mesh nano porous palladium-ruthenium electrode material for a fuel cell and a preparation method thereof. In the invention, EDTA (Ethylene Diamine Tetraacetic Acid) is used as a complexing agent, HCHO (formaldehyde) is used as a reducing agent, a PdCl2 solution or a PdCl2+RuCl3 solution is reduced into nano catalyst particles by a hydrothermal method in one step, and the catalyst particles are deposited on the surface of a titanium sheet to manufacture a corresponding electrode. The catalyst particles are uniformly spherical, wherein the diameters of the catalyst particles are about 60nm, the catalyst particles are mutually connected and piled to form a porous structure, and the criss-cross three-dimensional mesh structure ensures that the electrode material structure is stable. The specific surface area of the prepared electrode material is large, thus the electrode material has high electrochemical activity on formic acid oxidation. Particularly, due to the addition of Ru, the starting potential of formic acid oxidation is greatly advanced. The electrode material has the advantages of simple preparation method, stable structure and good catalysis activity on the formic acid, thus the electrode material can be directly applied to formic acid fuel cells.

The invention discloses a multiwalled carbon nanotube-loaded PdSn catalyst based on a deep eutectic solvent and a preparation method and application of the catalyst, and relates to a simple and novel method for preparing an anode electrocatalyst for a direct formic acid fuel cell. According to the method, by taking a deep eutectic solvent as a medium, the catalyst is prepared by using a chemical reduction method. The preparation method of the catalyst is simple in process, and mild and environmentally friendly in operating condition. The dimension of catalyzing nano-particles can be obviously reduced by using a deep eutectic solvent system, so that the metal nanoparticles grow along the surface of a carbon nano tube and are agglomerated to form a special chain-like cluster structure, the electrochemical activity surface area of noble metals is increased, and moreover, the charge transfer interaction among the components in a composite material catalyst is further enhanced. Therefore, the electrocatalytic activity and stability of the catalyst on formic acid oxidation are hugely improved, and the catalyst has the excellent anti-CO poisoning capacity.

The invention belongs to the field of technologies for preparing supported catalysts, and particularly relates to a method for preparing graphene-supported palladium-iridium nano-particle catalysts and formic acid oxidation electrocatalysis application of the graphene-supported palladium-iridium nano-particle catalysts. The method includes steps of 1), adding graphene into formic acid solution and ultrasonically uniformly mixing the graphene and the formic acid solution with each other; 2), uniformly dispersing mixed solution prepared from chloroiridic acid and sodium chloropalladate under ultrasonic conditions; 3), heating mixed solution obtained at the step 2); 4), quickly injecting mixed solution obtained at the step 3) into graphene and formic acid mixed solution obtained at the step 1) and carrying out ultrasonic treatment under sealed conditions; 5), cleaning obtained products and then drying the products. The method and the formic acid oxidation electrocatalysis application have the advantages that the graphene-supported palladium-iridium nano-particle catalysts have extremely large electrochemically active specific surface areas and are extremely high in formic acid oxidation catalytic activity, high-toxicity materials are omitted, and the method is easy and convenient to implement, high in repeatability and suitable for mass production.

The invention relates to a catalyst and in particular relates to a Pd / WO3-RGO catalyst used for formic acid oxidation and a preparation method thereof. The Pd / WO3-RGO catalyst used for formic acid oxidation is prepared by dipping graphene oxide in a 10-30wt% AMT (ammonium metatungstate) solution, obtaining a WO3-GO carrier through hydrothermal synthesis treatment and then synthesizing the Pd-supported catalyst by a potassium borohydride reduction method. The Pd / WO3-RGO catalyst and the preparation method have the beneficial effects that the electrochemical properties, X-ray diffraction and scanning electron microscopes of catalysts are represented and the effects of carriers on the properties of the composite catalyst and comparison of the formic acid oxidation electrocatalysis properties of the catalysts are studied; the results show that the Pd / WO3-RGO catalyst has the best electrochemical property and stability and the catalyst with graphene as the carrier has better properties than carbon nanotubes.

The invention discloses a preparation method of a high-performance palladium / graphene methanoic acid oxidation catalyst. The preparation method comprises the following steps: (1) dissolving graphene, polyvinylpyrrolidone and ammonium tetrachloropalladate into water, so as to prepare a mixed solution; (2) after carrying out uniform ultrasonic dispersion on the mixed solution prepared in the step (1), adding methanoic acid, and continuously carrying out the uniform ultrasonic dispersion; (3) carrying out hydrothermal reaction on the solution uniformly and ultrasonically dispersed in the step (2); and (4) cleaning and drying a product of the hydrothermal reaction in the step (3), so as to obtain the high-performance palladium / graphene methanoic acid oxidation catalyst. Compared with a commercial palladium / carbon catalyst, the palladium / graphene catalyst prepared by utilizing the preparation method has excellent methanoic acid oxidation catalytic performance and long term stability and a high practical value and can be used for replacing commercial palladium / carbon catalyst to be directly applied to methanoic acid fuel cells and other energy conversation fields; furthermore, the catalyst is wide in raw material source and simple in preparation method and is suitable for large-scale production.

The invention relates to a method of one-step synthesis of cluster type palladium-copper nano particles and application of the cluster type palladium-copper nano particles. The method comprises the following steps that polyvinylpyrrolidone is dissolved in an organic solvent, and Pd(acac)2 and Cu(acac)2 are added under the condition of continuous stir so that a colorless solution is turned into a yellow green solution; then the solution conducts a reaction at the temperature ranging from 100 DEG C to 150 DEG C until the solution is blackened, and cooling is conducted to enable the temperature to be equal to the room temperature; and the mass ratio of polyvinylpyrrolidone to Pd(acac)2 to Cu(acac)2 is 12-17:5-6:4-6. In this way, the oxidation activity and the stability of formic acid can be improved, and compared with the performance of commercial Pd / C, the performance of formic acid is remarkably improved. In addition, the shapes of the synthetic nano particles can be regulated and controlled by changing the concentration of copper ions.

Electrocatalysts for the anode electro-oxidation of formic acid in direct formic acid fuel cells (DFAFCs). The Pd-, Pt- or PdPt-based electrocatalysts contain CeO2-modified ordered mesoporous carbon (OMC) as support material. Compositions and ratios of Pd:Pt in the electrocatalysts as well as methods of preparing and characterizing the catalysts and the CeO2-OMC support material.

The invention discloses a mesoporous platinum palladium cobalt electrocatalyst for catalyzing an oxidation reaction of formic acid and a preparation method of the mesoporous platinum palladium cobaltelectrocatalyst. The preparation method comprises the following steps: respectively preparing a chloroplatinic acid solution, a sodium chloropalladate solution and a cobalt chloride solution with theconcentration of 10 to 100mM, a hydrochloric acid solution with the concentration of 1 to 10M and an ascorbic acid solution with the concentration of 0.02 to 0.4M; respectively taking the chloroplatinic acid solution, the sodium chloropalladate solution and the cobalt chloride solution with the total volume of 4mL for mixing, adding 0.01 to 0.2mL of prepared hydrochloric acid solution and then adding 0.01 to 0.2g of F127; finally, adding 1 to 8mL of the ascorbic acid solution and uniformly mixing; after the solution is fully mixed, putting the solution into a water bath kettle, heating to 25 to 70 DEG C, reacting for 1 to 10 hours, washing, centrifuging and drying to obtain a platinum palladium cobalt alloy catalyst. The preparation method disclosed by the invention has the advantages of simple operation flow and relatively short reaction time; a material prepared at normal temperature and pressure has excellent electrocatalytic formic acid oxidation property.

The invention discloses a preparing method of an embedded porous Pd / C nano frame. The preparing method includes the steps that naphthylamine (C10H9N) serving as a coordinated molecule forms yellow complex precipitate with PdCl2, the precipitate is dried to obtain flaky Pd(II) naphthylamine powder, under inert atmosphere (nitrogen, or argon or carbon dioxide), the temperature is raised to 200-1000 DEG C, then high-temperature self-reduction is carried out to obtain the embedded porous Pd / C nano frame. The method is simple and easy to implement, the raw materials are low in cost, and large-scale production can be achieved. The embedded porous Pd / C nano frame prepared through the method has the advantages of being superfine in particle size (-5.0 nm), high in electrical conductivity and electrochemical activity and good in electrochemical stability and heat stability, and presents high catalytic activity and stability serving as a formic acid oxidation anode catalyst and an oxygen reduction cathode catalyst.

The invention discloses a three-dimensional metal palladium nanosheet rapid preparation method based on etching auxiliary growth. The three-dimensional metal palladium nanosheet rapid preparation method based on etching auxiliary growth comprises the following steps that (1) a palladium precursor is dissolved in a solvent; (2) an oxidative etching agent is added into the product in the step (1) and mixed evenly; and (3) reducing gas or reagent is introduced into the product in the step (2) till precipitate separates out, and a three-dimensional deposition metal palladium nanosheet is obtained through centrifugation and washing. Based on the etching auxiliary growth, through the etching effect of the etching agent and the reduction and regrowth of the reducing agent, the three-dimensional deposition metal palladium nanosheet can be rapidly compounded, the compounding time is 3-60 minutes, the concentration of the compounded three-dimensional deposition metal palladium nanosheet is 0.1-100 mg / mL, and the thickness of an element of the palladium nanosheet is 1-5 nm. The three-dimensional metal palladium nanosheet material prepared according to the method shows the excellent activity in an electrocatalytic formic acid oxidation reaction.

The invention belongs to the technical field of catalyst preparation and relates to a palladium-tin nano-chain network catalyst and a preparation method and application thereof. The method comprises the following steps of (1) adding polyvinyl pyrrolidone to a glycol solution and carrying out ultrasonic mixing evenly; (2) adding ammonium chloropalladate, stannous chloride dehydrate and citric acidto a solution obtained in the step (1) and dispersing evenly under ultrasonic conditions; (3) transferring a mixed solution obtained in the step (2) into a hydrothermal reactor, carrying out heating and heat preservation for a period of time and then carrying out temperature reaction for a period of time; (4) cleaning a product obtained in the step (3) and then ultrasonically dispersing the product into ethanol; (5) adding XC-72 carbon powder to the ethanol and dispersing evenly under the ultrasonic conditions; (6) adding the solution obtained in the step (4) to the solution obtained in the step (5) and carrying out ultrasonic mixing evenly; and (7) cleaning the product obtained in the step (6) and then carrying out vacuum drying. The catalyst prepared through the method has very high electrochemically active specific surface area and formic acid oxidative catalytic activity, and is simple in operation and suitable for large-scale preparation.

The invention discloses a preparation method of a palladium nano-catalyst for a DFAFC (direct formic acid fuel cell), and the method comprises the following preparation steps: 1) dispersing a carbon carrier in ethylene glycol to obtain suspension liquid; 2) adding a medium palladium metal precursor to the suspension liquid obtained at the step 1), and performing full impregnating to obtain impregnating solution; 3) adjusting the pH value of the impregnation liquid obtained at the step 2) to obtain colloidal liquid; 4) introducing argon into a colloidal liquid system, and removing oxygen dissolved in the system; 5) adding sodium borohydride-sodium borohydride to the system under the temperature of 25-45 DEG C, and continuously stirring the solution for reaction for several hours and then performing aging; 6) carrying out suction filtration, washing and drying of the reaction final product to obtain a product. The preparation method provided by the invention is simple in process and goodin reproducibility, and the prepared palladium-based catalyst is uniform in distribution, has good catalytic activity and stability when being used for direct formic acid oxidation. Moreover, the preparation conditions are relatively moderate, and the method is suitable for industrial large-scale production.

A membrane electrode assembly for a fuel cell comprises a solid polymer electrolyte membrane, an anode being formed on one side of the solid polymer electrolyte membrane and containing a catalyst and a solid polymer electrolyte, a cathode being formed on another side of the solid polymer electrolyte membrane and containing a catalyst and a solid polymer electrolyte, an anode gas diffusion layer formed on one side of the anode, and a cathode gas diffusion layer formed on one side of the cathode. In addition, a formic acid oxidation electrode containing palladium and a solid polymer electrolyte is formed between the anode gas diffusion layer and the anode.

The invention discloses a FePt@C composite nano material prepared on the basis of MOF and application thereof to preparation of an electro-catalytic fuel cell. According to the composite nano material, three-dimensional MIL-101 (Fe) is used as a carrier, chloroplatinic acid is reduced into Pt nano particles through heating reflux, the Pt nano particles are encapsulated into a prepared MIL-101 (Fe)cavity, and then the FePt@C composite material is prepared through high-temperature pyrolysis. Pt and Fe form alloy nanoparticles, the synergistic effect between Pt and Fe can promote the change of an electronic structure and enhance the affinity of FePt to HCOOH, surface oxide can be formed under very low potential, the formic acid oxidation performance is obviously higher than that of commercial Pt / C, the preparation method is simple, the problems of poor conductivity of MOF and high cost of a Pt-based catalyst are effectively solved, and a new direction is provided for preparation and electrocatalytic application of other MOF-derived metal carbon materials.

The invention discloses a multiwalled carbon nanotube-loaded PtCo catalyst based on a deep eutectic solvent and a preparation method and application of the catalyst, and relates to a simple and novel method for preparing an anode electrocatalyst for a direct formic acid fuel cell. According to the method, by taking a deep eutectic solvent as a medium, the catalyst is prepared by using a chemical reduction method. The preparation method of the catalyst is simple in process and mild and environmentally friendly in operating condition. The charge transfer interaction among components in a composite material catalyst can be obviously enhanced by using a deep eutectic solvent system, the dispersity of noble metals is improved, and the electrochemical activity surface area of the noble metals is improved, so that the electrocatalytic activity and stability of the catalyst on formic acid oxidation are hugely improved and the catalyst has the excellent anti-CO poisoning capacity.

The invention discloses a formic acid fuel cell anode catalytic material and belongs to the field of inorganic functional materials. Carbon-loaded palladium chromium alloy catalysts with different Pd-Cr atomic ratios are prepared; the catalytic activity and the stability of the carbon-loaded palladium chromium alloy catalyst carrying out electrochemical oxidization on formic acid are higher than those of the carbon-loaded palladium catalyst, wherein the peak current of the carbon-loaded palladium chromium alloy catalyst with the atom amount ratio of palladium to chromium of 8:2 is about 2.8 times that of the Pd / C catalyst, and the oxidization spike potential ratio of the carbon-loaded palladium chromium alloy catalyst shifts negatively for 70mV compared with the oxidization spike potential ratio of the Pd / C catalyst. Therefore, the formic acid fuel cell anode catalytic material disclosed by the invention is beneficial to application to direct formic acid oxidization fuel cell anode catalytic materials.

The invention provides a preparation method of a coal-based carbon fiber loaded palladium catalyst. The method comprises the following steps: firstly adopting coal as a carbon source, pre-oxidizing the coal to obtain oxidized coal, preparing the oxidized coal and polyacrylonitrile to obtain a spinning solution of certain concentration, preparing a carbon fiber precursor by controlling parameters such as voltage, an injection speed of the spinning solution, a receiving distance and the like by utilizing an electrostatic spinning method, performing carbonization, and preparing coal-based carbonfibers with a uniform size; and preparing the coal-basesd carbon fiber loaded palladium catalyst under the condition that palladium chloride is used as a palladium source and ethylene glycol as a reduction agent. The coal-based carbon fiber loaded palladium catalyst prepared by the preparation method has good formic acid oxidation electric catalytic performance. The coal resource with rich storageamount is used as a carbon source, and the prepared high-performance carbon fiber composite material not only has potential application prospect in the aspect of fuel cells, but also realizes the high additional value of the coal; and therefore, the important actual significance is realized.

The invention discloses a graphene-based gas diffusion electrode for a proton exchange membrane fuel cell and a preparation method of the graphene-based gas diffusion electrode. The graphene-based gas diffusion electrode contains a Pt nanowire thin film, a reduction-oxidization graphene layer and carbon paper, wherein the thickness of the Pt nanowire thin film reaches 5-20 nanometers, and the pore coverage rate of reduction-oxidization graphene on the carbon paper reaches 80-98%. The preparation method is divided into a Hummer method, a thermal-reduction method and a DC sputtering method and comprises the steps of firstly, preparing a graphite oxide solution by the Hummer method; secondly, diluting the graphite oxide solution, dropwise coating the graphite oxide solution on the carbon paper, and obtaining the reduction-oxidization graphene by the thermal-reduction method; and finally, sputtering Pt onto the carbon paper covered by the reduction-oxidization graphene by the DC sputtering method to obtain a target material. During electrochemical test on the prepared graphene-based gas diffusion electrode, relatively high electrochemical activity area and excellent formic acid oxidization property are shown.

The invention relates to the field of textile technology, and provides a low-temperature weak-damage wool dyeing process. The low-temperature weak-damage wool dyeing process comprises the following steps of (1) carrying out pretreatment; (2) performing hydrogen peroxide-formic acid oxidation pretreatment; (3) carrying out dyeing; (4) performing pressure relief; (5) carrying out alkali color fixingtreatment; (6) carrying out soaping; (7) carrying out water washing; and (8) performing repairing treatment, and taking out of a cylinder. The process has the beneficial effects that (1) through a triple swelling synergistic effect of the formic acid-hydrogen peroxide oxidization system, dyeing under pressure and glutamine transaminase repairing, low-temperature dyeing can be realized and the damage to the wool fibers is reduced, the dyeing can be performed at the dyeing temperature of 75-80 DEG C, the dyeing time is shortened by 30-35%, and the problem of yellowing caused by long-term boiling dyeing of wools at a high temperature can be avoided; and 2) through the process, the dye uptake and the dyeing fastness are both improved by 5-6% compared with those in the conventional dyeing method, the fiber strength, breaking elongation, and the moisture regain rate are all improved in a relatively high degree, the use amount of dye is highly reduced, and the enterprise production cost is lowered.

The invention discloses a palladium-ruthenium nano-thorn assembly catalyst and a preparation method thereof. Sodium tetrachloropalladate and ruthenium chloride solution of which the concentration is 1-30mM, hydrochloric acid solution of which the concentration is 1-10M and ascorbic acid solution of which the concentration is 0.01-0.5M are independently prepared; the sodium tetrachloropalladate andruthenium chloride solution of which the total volume is 3.0mL is independently taken for mixing, then, 0.1-0.5mL of prepared hydrochloric acid solution is added, and 0.1-0.5g of potassium bromide and F127 can be added to be evenly mixed; finally, 1-10mL of ascorbic acid solution is added; and after solution is fully mixed, the mixture is heated in an oil bath pan to 70-130DEG C to react for 0.1-3h, and washing, centrifugation and drying are carried out to obtain the palladium-ruthenium nano-thorn assembly catalyst. The preparation technology is simple, reaction time is short, and the prepared material has an excellent electrochemistry formic acid oxidation property at a normal temperature under normal pressure.

The invention discloses a preparation method of a graphene-supported Pd nanoflower catalyst and a product of the graphene-supported Pd nanoflower catalyst and an application in a formic acid fuel cell. A Pd nanoflower which is uniform in size and distribution directly grows on the graphene surface through modifying a phosphomolybdic acid on the graphene surface by a method of reducing H2PdCl4 through an ascorbic acid. According to the method, no surfactant is added; the overall synthetic process is carried out in a water solution at a room temperature and atmospheric pressure; and any complicated instrument is not needed. The Pd nanoflower of the prepared catalyst can be firmly combined on the graphene surface; and the dispersity is relatively high. The catalyst is applied to the formic acid fuel cell, has very excellent formic acid oxidation catalysis activity and outstanding stability, can be used as a positive catalyst of a direct formic acid fuel cell, and has a very broad application prospect.

The invention relates to epoxidized hydroxyl-terminated polybutadiene liquid rubber and a preparation method thereof, and belongs to the technical field of hydroxyl-terminated polybutadiene liquid rubber. The liquid rubber is prepared from the following raw materials in parts by weight: 50-60 parts of hydroxyl-terminated polybutadiene, 60-70 parts of H2O2, 20-25 parts of formic acid, 120-150 parts of methylbenzene, 80-100 parts of acetone and 3-5 parts of hydrochloric acid. By adopting a formic acid oxidation technology, the epoxidized hydroxyl-terminated polybutadiene liquid rubber with a relatively high epoxide number is prepared. The epoxide number of the prepared epoxidized hydroxyl-terminated polybutadiene liquid rubber can reach 0.45-0.5.

The invention discloses application of ethylene diamine tetraacetic acid or salts thereof to an electrolyte addictive in a direct methanol fuel cell. A certain amount of ethylene diamine tetraacetic acid (EDTA) or salt compounds thereof are added in DFAFC (Direct Formic Acid Fuel Cell) electrolyte containing methanoic acid to obtain the DFAFC electrolyte with high performance; and the decomposition of formic acid on a Pd catalyst can be completely inhibited, the electrocatalytic activity and the stability to formic acid oxidation caused by the Pd catalyst can be remarkably improved simultaneously and the performance of the direct methanol fuel cell is improved.

The invention discloses platinum-palladium-phosphorus dendritic nanoparticles for catalyzing formic acid oxidation reaction and a preparation method thereof. The preparation method comprises the following steps: respectively preparing a chloroplatinic acid solution with the concentration of 10-100mM and an ascorbic acid solution with the concentration of 0.05-0.5M; taking the chloroplatinic acid solution with the volume of 5mL, then adding 20-100mg of Brij58, then adding 1-10mL of the ascorbic acid solution for mixing; carrying out ultrasonic reaction at room temperature for 5-60 minutes, performing centrifuging and washing to obtain dendritic platinum nanoparticles, and dispersing the dendritic platinum nanoparticles into the 2mL of aqueous solution; dissolving 5-80mg of tetrakis(triphenylphosphine) palladium and dendritic platinum nanoparticles into 22mL of oleylamine; and carrying out hydrothermal reaction at 100-200 DEG C for 5-20 hours, and performing centrifuging and washing to obtain the platinum-palladium-phosphorus dendritic nanoparticles. The synthesis method is simple, the product yield is high, and the prepared platinum-palladium-phosphorus nanoparticles have the excellent electro-catalytic formic acid oxidation performance.

The invention relates to a method for preparing Au / g-C3N4 composite-type micro-nano material. The method is realized by steps of adding g-C3N4 powder in 400-900nano in granularity to chloroauric acid solution, ultrasonically dispersing the g-C3N4 powder so as to prepare turbid liquid; heating the turbid liquid in water bath; then, adding sodium citrate to solution, stirring, washing, separating and drying a mixture so as to obtain Au / g-C3N4 composite-type micro-nano material; the Au / g-C3N4 composite-type micro-nano material has excellent photochemical catalysis effect to formic acid oxidation; and oxidation potential is negatively shifted by 800mV (close to the catalytic oxidation potential of Pt) without ctalyst poisoning phenomenon. According to the advantages of the invention, acquired composite material particles are even and not united; a preparation method is simple; and cost is relatively low.