20 results about "Electrochemical decomposition" patented technology

This document describes an electrode for the electrochemical decontamination of a liquid or a liquid-containing mixture. The electrode has a coating designed to promote the electrochemical decomposition of a contaminant. Furthermore, an electrochemical reactor is provided, also designed for the electrochemical decontamination of a liquid or a liquid-containing mixture. The reactor includes a first electrode, which can be operated as an anode and is designed to promote the electrochemical decomposition of a contaminant. The reactor and the electrode are configured such that the liquid or liquid-containing mixture flows past the electrode and comes into contact with at least a portion of its surface.

This invention relates to the technique of making electrocatalytic electrodes based on stainless steel modified through electrodeposition of Fe-Co-Ni ternary metal composites to increase the activity of electrochemically breaking down water molecules. Stainless steel / Fe-Co-Ni electrodes show higher electrocatalytic activity compared to unmodified stainless steel electrodes, single metal electrodes (stainless steel / Fe, stainless steel / Co, stainless steel / Ni), and binary metal electrodes (stainless steel / Fe-Co, stainless steel / Fe-Ni, and stainless steel / Co-Ni). The electrodeposition process was carried out using a solution containing 0.01 M FeSO₂, 0.01 M Co(NO₂), and 0.01 M NiSO₂ with an ion composition of Fe²₂:Co²₂:Ni²₂ = 1:1:1.In media containing 5 g NaHCO₂ / L, the stainless steel / Fe-Co-Ni electrode has a hydrogen evolution reaction activity approximately 32.28 times higher than stainless steel, and approximately 1.6–1.9 times higher than single metal and binary electrodes. The characterization results show that the deposited metal composition is 57.09% Fe, 0.22% Co, and 0.74% Ni, with a potential difference of 0.83 V to Ag / AgCl, a specific surface area of ​​6.970 m² / g, a total pore volume of 0.0112 cm³ / g, and a pore radius of 15.331 Å. The combination of these characteristics produces an electrode with superior electrocatalytic performance for hydrogen production through water electrolysis.

The invention relates to a device and a method for the electrochemical decomposition of a consumable two-dimensional layered semiconductor or conductor material, comprising at least one electrolytic cell and a feed system for feeding the consumable two-dimensional layered semiconductor or conductor material into an electrolyte.

Here an electrode for electrochemical decontamination of a fluid or fluid-containing mixture is described. The electrode comprises a coating that is configured to promote electrochemical decomposition of a contaminant. In addition an electrochemical reactor configured for electrochemical decontamination of a fluid or fluid-containing mixture is provided. The reactor comprises a first electrode that can be operated as an anode and that is configured to promote electrochemical decomposition of a contaminant. The reactor and the electrode are configured such that the fluid or fluid-containing mixture flows by the electrode, contacting at least a portion of the surface of the first electrode.

The invention relates to an all-solid-state photoelectrochemical water decomposition hydrogen production device which comprises a cover plate, an anode frame, a cathode frame and a bottom plate, a proton exchange membrane is arranged on the junction surface of the anode frame and the cathode frame, and the gel electrolyte in the proton exchange membrane is divided into two layers; a cathode layer, a cathode current collector and a bottom plate are sequentially arranged on the bottom surface of the cathode frame; an anode current collector, a photo-anode layer and a cover plate are sequentially arranged on the top surface of the anode frame; a semiconductor film is loaded at the center of the photo-anode layer; a water inlet and a water outlet are respectively formed in the side surfaces of the anode frame and the cathode frame; an oxygen outlet is formed in the cover plate; and a hydrogen outlet is formed in the bottom plate, penetrates through the cathode current collector and the cathode layer and is communicated with the inner cavity of the cathode frame. The problem that liquid electrolyte in a traditional system can leak can be solved, the distance between the photo-anode layer and the cathode layer can be shortened to several millimeters without causing short circuit, and the current density and the conversion efficiency of photoelectrochemical water decomposition are effectively improved.

This invention provides a method for preparing hydrogen and sulfur from solid waste gypsum through reduction and acidification in a cement kiln, relating to the field of solid waste disposal technology. The method involves targeted local modifications to a novel dry-process cement clinker rotary kiln production system. Using desulfurized gypsum, phosphogypsum, and other solid waste gypsum as raw materials, the gypsum is crushed, ground, preheated, and dehydrated. Then, it is calcined in a modified three-lobe gravity semi-suspended rotary kiln at 800–1100℃ in a reducing atmosphere to generate high-purity calcium sulfide. After sealed cooling, the calcium sulfide reacts with byproduct hydrochloric acid to produce high-purity hydrogen sulfide. The hydrogen sulfide is then used to co-produce hydrogen and sulfur via a medium-assisted electrochemical decomposition method, or high-purity sulfur can be directly prepared using the Claus process. This invention achieves full resource utilization of solid waste gypsum using existing cement kiln equipment, requires minimal modification, has low investment costs, and enables the cascade utilization of CO waste gas and kiln waste heat, reducing overall energy consumption by more than 30% compared to traditional processes.

In some embodiments, an electrochemical sensing system includes a working electrode and a reference electrode. At least a portion of the working electrode includes rhodium. An electrical circuit is electronically coupled to the working electrode and the reference electrode. The electrical circuit is configured to bias the working electrode at voltage of less than about 0.4 V which is sufficient to electrochemically decompose a target analyte, and to measure a current corresponding to the concentration of the target analyte. In some embodiments, a biosensing molecule can be disposed on the working electrode and is operative to catalytically decompose a non-electroactive target analyte to yield and an electroactive by-product. In some embodiment, the reference electrode can include rhodium and its oxides.

The invention discloses a multifunctional polyanion positive electrode material based on a core-shell-buffer layer structure and a preparation method of the multifunctional polyanion positive electrode material. The positive electrode material sequentially comprises an inner core, a buffer layer and a shell from inside to outside, wherein the inner core is formed by the polyanion type sodium-ion battery positive electrode material; the buffer layer is coated on the surface of the inner core; the shell is coated on the surface of the buffer layer. The buffer layer is composed of organic sodium salt which can be electrochemically decomposed to release sodium ions in the first charging process and does not generate gas after being decomposed; the shell is composed of a sodium ion fast ion conductor. Through the unique three-layer structural design, efficient and safe in-situ sodium supplementation is realized, the first coulombic efficiency, energy density and cycling stability of the sodium ion battery are remarkably improved, and meanwhile, the ion / electron conductivity of the material is improved. The invention also provides a preparation method of the positive electrode material and a sodium ion battery containing the positive electrode material.

In some embodiments, an electrochemical sensing system includes a working electrode and a reference electrode. At least a portion of the working electrode includes rhodium. An electrical circuit is electronically coupled to the working electrode and the reference electrode. The electrical circuit is configured to bias the working electrode at voltage of less than about 0.4 V which is sufficient to electrochemically decompose a target analyte, and to measure a current corresponding to the concentration of the target analyte. In some embodiments, a biosensing molecule can be disposed on the working electrode and is operative to catalytically decompose a non-electroactive target analyte to yield and an electroactive by-product. In some embodiment, the reference electrode can include rhodium and its oxides.

The invention belongs to the application field of hydrogen production through photoelectrochemical water decomposition, and particularly relates to a metal-porphyrin polymer / bismuth vanadate composite photo-anode and a preparation method and application thereof. According to the preparation method disclosed by the invention, the poly transition metal-5, 10, 15, 20-tetra (tetra-diphenyl aminophenyl) porphyrin catalyst is successfully polymerized on the surface of BiVO4 in situ for the first time through an electric polymerization method, so that a molecular polymer anchored by transition metal is successfully catalyzed and uniformly dispersed on the BiVO4 composite photo-anode, and the water oxidation kinetics and photo-generated charge transfer efficiency of BiVO4 are remarkably improved; the performance of photoelectrocatalysis is promoted, and good stability is presented.

The invention relates to the use of a monomer according to formula (1) for producing a bond break in a polymer that is obtained from at least one monomer according to formula (1), wherein the bond break is induced by applying an electrical voltage across the polymer, and to a method for the electrochemical disintegration of such a polymer. The invention further relates to polymerisable monomers according to formula (1) and polymers obtained therefrom.

The application discloses a kind of gas compression and generation equipment for extraterrestrial life maintenance, including the vortex compression mechanism and oxygen generation mechanism connected in sequence;The vortex compression mechanism is connected with gas collection and pretreatment device, for the multi-stage pressurization of the dilute CO2 after pretreatment, and output smooth airflow;The oxygen generation mechanism is used to decompose the pressurized CO2 into oxygen and carbon monoxide under high temperature conditions, and realizes the separation and collection of product;The vortex compression mechanism and high-temperature electrolysis mechanism are closely integrated, the compact structure and lightweight are realized;Power transmission is carried out through the eccentric idler shaft of the dynamic disc vortex track assembly, effectively solving the technical bottleneck of low gas compression efficiency and serious sealing leakage in the low pressure environment of extraterrestrial, the pressurized CO2 is decomposed into oxygen and carbon monoxide by high-temperature solid oxide electrolysis stack;The utilization efficiency of resources is improved, and the closed-loop circulation of key substances is realized.

The present invention provides an all-solid-state capacitor that can improve capacitance by using an all-solid-state electrolyte, and a method for manufacturing an all-solid-state capacitor. [Solution] The all-solid-state capacitor 1 consists of a solid electrolyte layer 2 made of a solid electrolyte sandwiched between a pair of current collector layers 3, the current collector layers 3 being made of a stainless steel alloy, and a decomposition reaction layer 4 provided at the interface between the current collector layer 3 and the solid electrolyte layer 2. The all-solid-state capacitor 1 is manufactured by creating a solid electrolyte layer 2 using a solid electrolyte and a current collector layer 3 using a stainless steel alloy as the current collector, stacking the solid electrolyte layer 2 sandwiched between a pair of current collector layers 3, and further applying a voltage between the pair of current collector layers 3 in which the solid electrolyte layer 2 is sandwiched at a potential at which a reductive decomposition reaction occurs as electrochemical decomposition, thereby forming a decomposition reaction layer 4 at the interface between the solid electrolyte layer and the current collector layer by a reductive decomposition reaction.

This invention discloses a lithium oxalate supplementary agent, its preparation method, and its application, belonging to the field of lithium supplementary agent technology. The lithium oxalate supplementary agent comprises: a nickel nitride-carbon heterojunction catalyst and lithium oxalate adsorbed on the surface and / or within the pores of the nickel nitride-carbon heterojunction catalyst; wherein: the preparation method of the nickel nitride-carbon heterojunction catalyst includes the following steps: dissolving a nitrogen source and a nickel source in a solvent, adding a carbon source, and stirring to form a dispersion; evaporating the dispersion to dryness and pulverizing it to obtain a precursor; calcining the precursor under a nitrogen-containing atmosphere to obtain the nickel nitride-carbon heterojunction catalyst. This invention prepares a nickel nitride-carbon heterojunction catalyst through a combination of liquid-phase dispersion and solid-phase calcination. This catalyst possesses both high catalytic activity and excellent electronic conductivity; furthermore, the built-in electric field formed at the heterojunction interface can optimize the electronic structure. When combined with lithium oxalate, it can effectively reduce the electrochemical decomposition energy barrier of lithium oxalate during lithium supplementation.

This invention provides a lead-acid battery regeneration device that enables the reuse of lead-acid batteries in a short time. The device (100) regenerates the lead-acid battery (18) by electrochemically decomposing and reducing the lead sulfate crystallized insulating material. It comprises: a storage circuit (17) with a capacitor to which charge is stored; a discharge switch circuit (19) that controls the on / off state of the storage circuit (17) to apply a pulse voltage to the lead-acid battery (18); and a series resonant circuit (30) configured by connecting the storage circuit (17), the lead-acid battery (18), and the discharge switch circuit (19) in series. By applying a pulse voltage of a predetermined frequency once to the lead-acid battery (18), N-th harmonic resonance phenomena (where N is an integer greater than or equal to 1) are generated within the lead-acid battery (18). The lead-acid battery (18) is regenerated by repeatedly applying this pulse voltage multiple times.

The invention relates to the use of a monomer according to formula (1) for generating a bond cleavage in a polymer obtained from at least one monomer according to formula (1), wherein the bond cleavage is induced by applying an electrical voltage across the polymer, and to methods for the electrochemical disintegration of such a polymer. The invention further relates to polymerizable monomers according to formula (1) and polymers obtained therefrom.

The invention provides lithium-rich lithium ferrite as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The preparation method comprises the following steps: mixing a lithium source, an iron source, an organic metal source and an organic solvent, carrying out solvothermal reaction, and calcining the obtained precursor in a protective atmosphere to obtain the lithium-rich lithium ferrite. The activation voltage of the obtained lithium-rich lithium ferrite is low and is 3.5-3.7 V, the electrochemical decomposition potential energy barrier of the lithium-rich lithium ferrite is reduced, the lithium-rich lithium ferrite is decomposed gently in the lithium supplementing process, the lithium-rich lithium ferrite can better fit the charging and discharging interval of a lithium iron phosphate battery, and the lithium supplementing performance is better exerted. After carbon coating, the material has relatively good lithium supplement performance, and the service life and the long cycle performance of the lithium ion battery can be improved.

The present application relates to a kind of flowable conductive zinc slurry and its preparation method and hydrogen production application, and the conductive zinc slurry includes zinc salt aqueous solution, conductive agent, dispersant and organic ligand, the mass ratio of zinc salt aqueous solution, conductive agent, dispersant and organic ligand is (50-280) :(10-60) :(5-50) :(5-40), the conductive zinc slurry is used as cathode slurry electrode liquid, for two-step hydrogen production.Compared with prior art, the present application provides a kind of efficient, safe, low-cost cycle process route to realize electrochemical efficient step-by-step water splitting hydrogen production, the coulomb efficiency of hydrogen production reaches more than 98%, while oxygen and zinc metal by-products can be obtained, and it has very high application value in the field of electrochemical water splitting hydrogen production technology.

The application discloses a monoclinic phase BiVO4 micropipe prepared by a microwave radiation method and a preparation method thereof. Pure Bi(NO3)3.5H2O and NH4VO3 are used as reaction raw materials, distilled water is used as a solvent, polyethylene glycol (PEG-10000) with a molecular weight of 10000 is used as a surfactant, and a monoclinic phase BiVO4 micropipe material is prepared by using a microwave radiation technology. The microwave radiation process is simple in operation, energy-saving and environment-friendly, low in energy consumption, and energy-concentrated, and is favorable for improving a reaction rate and a synthesis efficiency of the BiVO4 material. The XRD and SEM analysis results of the product fully prove that the method can obtain the BiVO4 material with regular morphology and small particle size, is favorable for increasing active sites of the BiVO4 material, and thus improves the photocatalytic performance of the BiVO4 material. The target product BiVO4 material has the abilities of catalytic degradation of pollutants, catalytic photoelectrochemical decomposition of water and energy storage, and is expected to play an important role in the field of photocatalysis.

An embodiment of the present disclosure relates to a hydrogen supply system including a water electrolysis stack configured to produce hydrogen by electrochemically decomposing water, and a metal hydride compressor connected to the water electrolysis stack and configured to treat the hydrogen before supplying the hydrogen to a supply destination, thereby obtaining an advantageous effect of simplifying a structure and improving spatial utilization and a degree of design freedom.