101 results about "Electrosynthesis" patented technology

Methods to manufacture nanoscale particles comprising metals, alloys, intermetallics, ceramics are disclosed. The thermal energy is provided by plasma, internal energy, heat of reaction, microwave, electromagnetic, direct electric arc, pulsed electric arc and/or nuclear. The process is operated at some stage above 3000K and at high velocities. The invention can be utilized to prepare nanopowders for nanostructured products and devices such as ion conducting solid electrolytes for a wide range of applications, including sensors, oxygen pumps, fuel cells, batteries, electrosynthesis reactors and catalytic membranes.

The invention relates to a rechargeable metal-air redox flow battery compatible with electrochemical preparation. When the battery is charged, electric energy input makes metal ions in the electrolyte flowing through a negative electrode reduced and deposited into metal to prepare for discharge, and the electric energy also makes reductive raw materials in the electrolyte flowing through a positive electrode oxidized into a product required to be synthesized. When the battery is discharged, the positive electrode is introduced with air or oxygen, the air or the oxygen is reduced on the electrode, and the positive electrode and a deposition redox flow metal negative electrode form the metal-air redox flow battery to output electric energy. In each charge and discharge cycle, the accumulation and discharge of the metal-air redox flow battery are carried out, and simultaneously electrooxidation chemical production is carried out so as to achieve the effect that one portion of electric energy is consumed and two functions are realized. The redox flow battery combines two functions of rechargeable metal-air accumulation and electrochemical preparation, realizes the combination of electrosynthesis, a deposition redox flow battery and a rechargeable metal-air battery, achieves the effects of energy conservation and high efficiency, improves the utilization rate of the electric energy and has good application prospect.

The invention belongs to the field of electrosynthesis ammonia. A catalyst for electrochemically synthesizing ammonia is formed by coating a metal organic skeleton, auxiliary carbon and a binding agent on carbon paper. The catalyst has the advantages of being easy to prepare, low in cost and high in catalysis efficiency. By using the catalyst, ammonia can be synthesized at normal pressure and low temperature, and energy consumption is greatly reduced. Air can be directly used as a raw material for synthesizing ammonia, the raw material source is enriched, raw material cost is reduced, and synthesis ammonia cost is reduced.

The invention provides a fused salt electrosynthesis method of a hydrogen storage alloy containing magnesium, lithium, sodium and potassium, in particular to a preparation method of an electrosynthesis AB3 type hydrogen storage alloy containing magnesium, lithium, sodium and potassium, comprising a fused salt electroosmosis step and a fused salt electrolysis step which are used simultaneously. The hydrogen storage alloy containing MmNi4.2Al0.7 and the like are used as cathodes in KCl.LiCl fused salt electrolyte. The preparation method comprises the following steps of: carrying out Li electroosmosis on the cathodes, such as the hydrogen storage alloy and the like, at 420-450 DEG C; regulating the composition of the fused salt electrolyte to a quaternary mixed salt system of KCl.NaCl.LiCl.MgCl2, and also increasing the temperature; and carrying out limit electrolysis with the electrolytic cathode current density of 18-22 A/cm<2> to obtain the AB3 type hydrogen storage alloy containing magnesium, lithium, sodium and potassium. The fused salt electroosmosis step and the fused salt electrolysis step are closely linked; the Li electroosmosis is carried out at low current density, Mg is electrolyzed at high current density, and K and Na are added through compelling electrolysis so that in-situ electrodeposition is realized in a same electrolytic cell. The invention belongs to the field of a short-process touch process.

The invention discloses a bioelectricity synthesis system and a method for synthesizing acetic acid and/or ethyl alcohol through the same. The bioelectricity synthesis system comprises a reactor, an online pH control system, an air supply system and a power source. The reactor is a three-chamber reactor and comprises an air chamber, a negative electrode chamber and a positive electrode chamber, wherein the air chamber is connected with the air supply system; the negative electrode chamber is externally connected with the online pH control system, the negative electrode chamber and the air chamber are partitioned by an air negative electrode, and the negative electrode chamber is further internally provided with a reference electrode; the positive electrode chamber is internally provided with a positive electrode, the positive electrode chamber and the negative electrode chamber are partitioned by a cation exchange membrane, and the positive electrode, the air negative electrode and the reference electrode are externally connected with the power source through wires. Positive electrode electrolyte is added into the positive electrode chamber, a bioelectricity synthetic nutrient solution obtained after sterile and anaerobic treatment is added into the negative electrode chamber, and electrosynthesis bacteria are inoculated into the negative electrode chamber; carbon dioxide is sent into the air chamber through metering of the air supply system, and carbon dioxide penetrates through the air negative electrode and is converted into acetic acid and/or ethyl alcohol in the negative electrode chamber.

The invention discloses an organic electrosynthesis method of a phenothiazine/phenoxazine compound. The organic electrosynthesis method adopts an organic electrosynthesis means for a compound shown ina formula I and a compound shown in a formula II to prepare the phenothiazine/phenoxazine compound. The organic electrosynthesis method disclosed by the invention has the beneficial effects that a target product shown in a formula III can be obtained by directly activating C-H without need of expensive halogenated raw materials and additional reduction and substitution processes, so that the process flow is obviously shortened, the operation is simplified, the preparation efficiency is improved, and the production cost is reduced; the reaction condition is simple, mild and environmentally friendly, the atom economy is high, the adaptation range of a reaction substrate is wide, and the yield of a target product is high.

The invention discloses a silver-copper nano alloy and an electrosynthesis method thereof. The silver-copper nano alloy comprises Ag and Cu; the molar components of Ag and Cu are shown as a formula of xAg-(1-x)Cu, wherein x=0.5-0.9; the phase of the alloy is a face-centered cubic structure silver single phase solid solution; the (111) diffraction peak of the alloy is consistent with the (111) diffraction peak of pure metal Ag; and the alloy has a surface plasma resonance peak and has a dendritic shape, the secondary dendrite arm spacing is 100 to 300nm, and the tertiary dendrite arm length is 100 to 500nm. The silver-copper nano alloy with the dendritic structure is grown under constant potential. Electrolyte for preparation does not contain any surfactant molecules. The surface plasma resonance frequency of the alloy is modulated by controlling components of the alloy, and along with the increase of the silver content in the silver-copper alloy, the plasma absorption peak of the alloy generates red shift. The formed silver-copper nano dendrite has a rough and clean surface and a large specific surface area, and is better applied to the aspects such as surface enhanced spectrums, surface plasma optical catalysis, surface plasma enhanced solar absorption and the like.

The invention relates to a method for electrosynthesis of adiponitrile by using a dimensionally stable anode. The method comprises the following steps of: carrying out electrosynthesis of the adiponitrile in a non-diaphragm type electrolytic bath by utilizing titanium as a substrate, utilizing the dimensionally stable anode coated with oxides, such as ruthenium, iridium, tantalum and the like as an anode and utilizing plumbum or cadmium as a cathode; introducing a direct current of 500 A.m-2-3,000A.m-2 at the temperature of 20-60 DEG C for electrolysis; and maintaining the flow rate of interelectrode electrolytes to be more than 1m.s<-1>, wherein the electrolytes contain 0.5-7% by mass of acrylonitrile, 5-20% by mass of potassium phosphate, sodium phosphate, acid type potassium phosphate or acid type sodium phosphate as supporting electrolytes, 0.1-5.0% by mass of buffer, 0.1-10.0% by mass of guiding ion source quaternary ammonium salt and the balance of water, the pH value of the electrolyte is 6-10. An organic phase containing a product of adiponitrile, a by-product of propionitrile and a raw material AN (Acrylic Nitrile) which does not participate in the reaction is generated from electrolysis. The adiponitrile and the propionitrile are obtained from the organic phase through rectification. The method overcomes the defect of easy corrosion of the anode in the electrolysis, the yield of the adiponitrile reaches more than 80%, and the current efficiency is more than 75%.

A method for aired electrolysis during synthesis of benzaldehyde, sorbitol and mannitol comprises the followings: a cationic membrane is processed firstly, then electrode preparation and pretreatment are performed, and finally paired electrosynthesis is carried out, wherein paired electrosynthesis refers to that an H-type diaphragm electrolytic cell is provided with a cationic exchange membrane, both a cathode electrolytic bath and an anode electrolytic bath use a sodium sulfate solution as supporting electrolyte, sodium hydroxide is used for adjusting the alkalinity of the solution, then benzyl alcohol is added into an anode pool, glucose is added into a cathode pool, after stirring, the reaction temperature is adjusted through thermostatic waterbath, constant-current electrolysis is performed through setting electrolytic current, the benzyl alcohol is selectively oxidized to be benzaldehyde at the anode, and the glucose is reduced to be the sorbitol and the mannitol at the cathode. According to the method, in the same electrolytic process, two compounds of the benzyl alcohol and the glucose are both taken as raw materials, so that the benzaldehyde, the sorbitol and the mannitol are obtained simultaneously, the current efficiency and the time and space efficiency are improved greatly, the manufacturing cost and the energy consumption are reduced, the cathode product conversion rate is increased by more than 10 percent, and the economic benefit is very obvious.

The invention discloses a preparation method and application of a composite cathode integrating efficient in-situ electrosynthesis of hydrogen peroxide and catalytic performance, and relates to the technical field of preparation of electrode materials. The method comprises steps: soaking carbon nanotubes in a cobalt chloride solution and then complexing with potassium ferricyanide to form ferrocobalt prussian blue analogue loaded carbon nanotubes; preparing ferrocobalt alloy carbon nano tubes through nitrogen calcination, loading the ferrocobalt alloy carbon nano tubes on a foamed nickel metalelectrode of the carbon nano tube by adopting a dispensing process, preparing the composite cathode integrating in-situ electrosynthesis of hydrogen peroxide and catalytic performance, and successfully applying the composite cathode to a heterogeneous electro-Fenton system to degrade organic pollutants.

A low-Ag-content Pb-RE-Ag alloy electrode comprises (by weight percentage) rare earth (RE) 0.001-2.0, silver (Ag) 0.001-0.6 and lead in balance. RE is selected from at least one of La, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Dm, Yb, and Lu, and the total RE content is 0.001wt.%-2.0wt.%. With the invention, alloy has low cost, high mechanical strength, good corrosion resistance, and good electrochemical property, can find wide application in fields including metal electrodeposition, electroplating, wastewater treatment and organic electrosynthesis, and is suitable for industrial application.

The invention discloses a method for directionally producing syngas by chemical chain gasification of sludge. The method comprise the steps of 1, inputting an oxygen carrier, carrier gas and sludge into a sludge reactor to perform a chemical chain gasification reaction, wherein reaction temperature is 850-950 DEG C, and an oxygen carrier reaction time is 4-15s to acquire the syngas, sludge ash and the reduction state oxygen carrier; 2, inputting the acquired syngas, sludge ash and reduction oxygen carrier into a primary separation system to separate the reduction state oxygen carrier to acquire a mixture of the syngas and the sludge ash, wherein separation temperature is 350-500 DEG C, and cutting diameters are 2-4mm. According to the method for directionally producing syngas by chemical chain gasification of sludge provided by the invention, chemical chain gasification is used for directionally converting organics in the sludge into the high-quality syngas, gas proportion in the syngas can be directionally adjusted via the different reactions, and the oxygen carrier has a catalytic pyrolysis effect on tar generated by the reactions; the syngas is relatively low in tar content, and applicable to gas power generation, FT synthesis or fuel cells.

A method for preparing concave cubic platinum-rare earth alloy nanocrystals based on a eutectic solvent is disclosed, and belongs to the technical field of fuel cell catalyst preparation. The eutecticsolvent which is novel, green and non-aqueous is adopted as a medium to prepare the concave cubic platinum-rare earth alloy nanocrystals with a surface of a {hk0} high-index crystal face structure byelectrochemical cyclic voltammetry without the need of any surfactant. The high-index crystal face has an open type surface structure so that a high number of active sites can be provided and catalyst performance can be significantly improved through a double-function mechanism of an alloyed surface electron structure, and therefore, the nanocrystals have excellent electrocatalytic performance for fuel molecules such as formic acid, methanol and ethanol, and have broad application prospects in the field of fuel cells, the field of electrosynthesis, and the like.

The invention relates to a method for synthesizing carbonic acid diester and sebacic acid diester in pairs. The method realizes electrolytic synthesis of sebacic acid diester and carbonic acid diester in the same electrochemical synthesis system by designing an electrolyte and electrodes. Compared with a traditional electric synthesis process, the atom economy of a reaction is greatly improved, and energy consumption is reduced; and the method has good industrial prospects.

The invention belongs to the field of bioelectrochemistry, and particularly relates to a method for improving biological reduction of CO2 for electrosynthesis of acetic acid through a graphene-foam copper composite cathode. The method comprises the steps that firstly, microorganism culture is conducted; secondly, a double-chamber H-shaped electrolytic tank is constructed, the graphene-foam coppercomposite cathode is adopted as a cathode, microorganism fungi are inoculated into a cathode chamber of the double-chamber H-shaped electrolytic tank to be cultured, the electric potential of the electrode is -990 mV vs SHE, an anode chamber is continuously inflated with N2-CO2(80:20) gas, a cathode chamber is continuously inflated with N2-CO2-H2(83:10:7) gas at the beginning, after running is conducted for 5-6 days, continuous inflation of N2-CO2(80:20) gas is conducted, and running is continuously conducted for 10 days; and a fungus solution is collected, and the content of the acetic acid is measured. A method for acetic acid synthesis through an MES with graphene-foam copper composite materials as the cathode is provided, and the method has the high acetic acid production rate.

The invention belongs to the technical field of sewage treatment, and particularly provides an aeration-free electro-Fenton water treatment method and an aeration-free electro-Fenton water treatment device based on an air active diffusion cathode, wherein the method and the device have the advantages of high pollutant removal rate, low energy consumption and high stability. According to the invention, by using an air active diffusion electrode as a cathode of an electrochemical reactor, a large amount of H2O2 can be generated in situ through an oxygen reduction reaction and react with Fe<2+> to generate .OH with high oxidation capacity, so that organic pollutants in wastewater are efficiently degraded; with the method and the device, the defect that the conventional electrochemical water treatment device needs an aeration device to provide oxygen for in-situ generation of H2O2 is overcome, the investment and the operation energy consumption of aeration equipment are reduced, the yieldof H2O2 is improved, and the removal efficiency of pollutants is improved; and the novel water treatment device is simple in structure, low in electrode material cost and mild in operation condition,and can efficiently and electrically synthesize H2O2 in a wide current range so as to be used for electro-Fenton reaction treatment of wastewater.

The present invention provides a preparation method of Sn-Sb oxide coated anode material, which is used in direct electrochemical synthesis of super ferrate. This anode material has very high over-voltage of oxygen evolution and excellent stability and therefore electrochemical oxidation reaction can happen to trivalent iron compound, forming super ferrate without oxygen evolution. Besides, electrochemical redox reaction between super ferrate and trivalent iron compound on this anode material has good reversibility. It is easy to realize mass production. The anode material is cheap and does not pollute environment, therefore, the method is suitable for the preparation of high specific energy second batteries. It also has application value and potential in the treatment of alkaline waste water.