39results about How to "Improve oxygen production performance" patented technology

The invention provides a preparation method for similarly coralloid NiSe@NC. The preparation method comprises the following steps that S1, 4,4'-dipyridyl, trimesinic acid and nickel nitrate are dissolved in N,N-dimethylformamide sequentially, after stirring is conducted for 35 minutes at room temperature, the temperature is increased to 120-130 DEG C at the rate of 5-10 DEG C, thermal reaction isconducted for 60-70 h, and Ni-MOFs are obtained; and S2, selenium powder and the Ni-MOFs are heated to 500-800 DEG C at the rate of 1-5 DEG C/min at the argon atmosphere, and after 1-3 h of heat preservation, the similarly coralloid NiSe@NC is obtained. Compared with the prior art, the preparation method has the following beneficial effects that the metal organic frameworks with nickel as the center serve as the precursor, through a one-step in-situ selenylation strategy, the coralloid NiSe@NC is obtained, then the structure can provide abundant catalytic active sites, good electrocatalysis hydrogen production and oxygen production performance is shown, 60 and 320 mV overpotential and 53 and 101 mV dec<-1> Tafel slope are achieved, and the similarly coralloid NiSe@NC can serve as a bifunctional electrocatalyst for electrolysis hydrogen evolution and oxygen evolution.

The invention provides ferro-nickel diselenide, as well as a preparation method and application thereof. The ferro-nickel diselenide is a polyhedral nanocrystal and has a chemical formula as NixFe1-xSe2, wherein the value of X is 0.5. A Ni2Fe(OH)7 compound is prepared on a foamed nickel substrate through an electrodeposition method, and the reaction time only needs hundreds of seconds compared with the time required for a traditional hydrothermal method, so that the reaction time is greatly shortened; and the preparation process is simple and easy to implement, large-area preparation can be realized, a substrate covering the Ni2Fe(OH)7 compound can be prepared at a time, and foamed nickel is subject to selenylation through a solvent thermal selenization method so as to obtain the ferro-nickel diselenide which shows favorable hydrogen generation and oxygen generation performance.

The invention discloses an electrochemical ceramic membrane oxygen producing machine and oxygen producing equipment thereof, and relates to the technical field of oxygen production. The electrochemical ceramic membrane oxygen producing machine comprises a ceramic membrane stack, an airflow distributor, a heater, double helical exchangers and thermal isolation sleeves; the ceramic membrane stack comprises electrochemical ceramic membrane pieces vertically stacked parallelly, the sides of the electrochemical ceramic membrane pieces are closed to form vertical cavities, the other sides of the electrochemical ceramic membrane pieces are connected with oxygen outputting pipes through ceramic pipes, the bottom of the ceramic membrane stack closely fits the upper surface of the airflow distributor, and a heater is arranged at the lower end of the airflow distributor; the outer sides of the ceramic membrane stack, the airflow distributor and the heater are wrapped by the double helical exchangers, and the thermal isolation sleeves sleeve the two ends of each double helical exchanger and converge on a double helical interaction device. The electrochemical ceramic membrane oxygen producing machine and the oxygen producing equipment thereof can prepared pure oxygen, high-purity oxygen and hyperpure oxygen on site, and are small in size, light in weight, low in cost and suitable for quickdeployment.

The invention provides a preparation method of a nanoscale ruthenium dioxide-coated ruthenium-loaded carbon micron sheet. Compared with the prior art, the preparation method of the nano-scale ruthenium dioxide coated ruthenium-loaded carbon micron sheet has the advantages that the nano-scale ruthenium dioxide coated ruthenium-loaded carbon micron sheet prepared by the preparation method has the characteristics of high loading capacity and high dispersion and has a large specific surface area and a large number of mesoporous structures; the micro ruthenium dioxide coated ruthenium nanoparticles and carbon are chemically coupled together, so that the conductivity of the material is improved; the electronic structure of the material is improved and the number of active sites is increased by increasing the loading capacity of the ruthenium dioxide coated ruthenium nanoparticles; meanwhile, due to the large specific surface area and a large number of mesoporous structures, electrolyte permeation and gas release are facilitated, and the electro-catalytic activity and stability of the material are synergistically improved; and the preparation method is simple, consists of simple adsorption, calcination and oxidation, is high in operability, easy to repeat, high in stability and easy for large-scale production, and can meet the actual requirement of hydrogen production by fully decomposing water.

The invention discloses a bismuth telluride nanosheet loaded with cobalt nickel molybdenum particles and a synthesis method thereof. A bismuth telluride nanosheet is in a hexagonal shape. The cobalt nickel molybdenum particles are uniformly distributed on the surface of the bismuth telluride nanosheet. By means of a solvothermal method, the hexagonal bismuth telluride nanosheet is obtained by controlling the temperature, and loading of the cobalt nickel molybdenum particles is performed on the bismuth telluride nanosheet by means of a direct reduction method. The method is low in implementation cost, easy and convenient to implement, low in pollution, efficient and economic, and meanwhile the material particle distribution is more uniform, large in specific surface area and stronger in oxygen evolution performance.

The invention discloses an amorphous oxyhydroxide catalyst prepared by a mechanical stirring method and an efficient water electrolysis hydrogen production research of the amorphous oxyhydroxide catalyst, and belongs to the technical field of hydrogen production of electro-catalytic materials. According to the technical scheme, the method is characterized in that a precursor solution formed by mixing FeCl3. 6H2O, ethyl alcohol and NH4HCO3 is adopted for conducting mechanical stirring and doping on foam metal substrates such as commercial foam nickel and cobalt, chemical reduction and double decomposition reactions on the surfaces of the foam metal substrates are effectively controlled, and the nickel-iron or cobalt-iron-based oxide mesoporous film grows in situ. On the basis, low-cost preparation of the high-performance oxygen evolution catalyst is realized by virtue of a high-potential anodic oxidation method. The product shows excellent electrocatalytic oxygen evolution activity in an alkaline medium, the overpotential is reduced to about 310 millivolts at the large current density of 500 mA/cm<2>, and the composite material is durable and stable in performance, suitable for macro preparation, hopeful to be applied to the industrial alkaline electrolytic cell hydrogen production technology and capable of assisting rapid development of hydrogen energy economy in China.

The invention provides a novel nickel-iron bimetallic electrolysis water oxygen production catalyst. The valence state of nickel is high-valence +3 and + 4. An effective measure for improving the oxygen production performance of the catalyst is to improve the valence states of nickel and iron, especially the valence state of nickel, so as to obtain higher intrinsic activity; the invention providesthe method for preparing the high-valence nickel (+ 3 and + 4) iron bimetallic oxygen production catalyst under the condition of approximate normal temperature and normal pressure; the catalyst showsparticularly excellent oxygen production activity; and the preparation method is simple and suitable for large-scale production. According to the basic principle of the novel nickel-iron bimetallic electrolysis water oxygen production catalyst prepared by the method, the invention further provides a method for converting multivalent metal from low valence to high valence, so that besides the nickel provided by the invention, more low valence metal can be converted into high valence metal, so that different actual requirements can be met.

The invention discloses a nano preparation of porous Pt nanoflowers loaded with lactate oxidase, a preparation method of the nano preparation and application of the nano preparation in preparation of radiotherapy and chemotherapy combined sensitization anti-tumor drugs. The nano preparation takes porous Pt nanoflowers as a carrier to carry chemotherapeutic drugs, simultaneously carries lactate oxidase, and is coated with a cRDG modified liposome membrane. According to the nano preparation, drug intratumoral permeation is realized by using lactate oxidase-lactic acid substrate chemotaxis, a novel enzyme chemotaxis strategy taking lactic acid as a substrate is disclosed, and the application of a nano carrier in anti-tumor drug permeation is expanded.

The invention relates to an electrically-started chlorate oxygen candle grain, and belongs to the technical field of oxygen generators. The chlorate oxygen candle grain comprises an oxygen-producing explosive block, an ignition charge column, igniters and inorganic cotton, wherein more than two grooves matched with starting charge columns in size are formed in the top of the oxygen-producing explosive block, the starting charge columns are located in the grooves, mounting holes are formed in the ignition charge column, the igniters are placed in the mounting holes, and the igniters are connected in series or in parallel through wires, wherein the igniter and the ignition powder column are fixed through inorganic cotton. In the oxygen candle grain with the structure, heat generated after the igniter is electrified can decompose the ignition grain and generate heat, so that the oxygen generating explosive block is ignited, and smooth starting of an oxygen candle is realized.

The invention discloses a preparation method and application of a cobalt-based metal organic framework catalyst containing a Co4O4 quasi-cubic alkane structure. A triphenylamine carboxylic acid derivative L containing an azo functional group is used as a bridging ligand, and Co < 2 + > in transition metal salt Tm is used as a metal node; a three-dimensional metal organic framework compound Tm-L containing the Co4O4 quasi-cubic alkane structure is prepared by a solvothermal synthesis method, and the metal organic framework Tm-L not only simulates a natural oxygen production active center in structure, but also realizes multiphase of a homogeneous catalyst; meanwhile, due to the hydrophobicity of the azotriphenylamine derivative carboxylic acid ligand and a semi-open space formed by the azotriphenylamine derivative carboxylic acid ligand and the Co4O4 cluster, the water stability of the catalyst is ensured, and meanwhile, the entry of water molecules and the contact with catalytic active sites are enhanced. A multiphase photocatalytic water decomposition oxygen and hydrogen production experiment shows that the metal organic framework material Tm-L is a good bifunctional promoter and has a good application prospect in the field of photocatalytic water decomposition.