20 results about "Metal oxide electrode" patented technology

The present invention relates to a method for making an electrode provided with a catalytic coating for electrocatalytic processes, preferably gas evolution electrode, comprising: a- providing a precursor comprising salts of metals, wherein said metals are selected from a group consisting of combinations of one or more noble metal with one or more rare earth metal, b- heating said precursor to a temperature comprised between 300 and 700oC under oxygen or air, thus obtaining a dried powder comprising oxides of said metals, c- preferably, subjecting the dried powder to a process of particle size reduction, d- optionally storing or transferring said dried powder, e- dispersing said dried powder in a liquid thus obtaining a catalytic dispersion, f- applying said catalytic dispersion by a coating technique on a thermally unstable substrate thus forming a coated substrate, g- drying said coated substrate thus forming said electrode provided with a catalytic coating

This invention relates to the field of solar cell technology, and in particular to a self-assembled monolayer based on a fluorinated alcohol solvent, its preparation method, and a solar cell. The method involves adding a fluorinated alcohol as a co-solvent to a solution of the self-assembled monolayer material, which is then deposited onto the surface of a metal oxide electrode to construct a hole transport layer. The hydroxyl groups of the fluorinated alcohol can form hydrogen bonds with the phosphorus-oxygen double bonds in the phosphonic acid groups, reducing the electron density of the phosphorus atoms and thus weakening the chemisorption barrier of the self-assembled monolayer on the electrode surface, promoting the formation of a uniform and dense monolayer film. The resulting interface layer effectively suppresses interface defects and promotes hole extraction. Organic solar cells prepared using this method exhibit excellent performance in terms of energy conversion efficiency, stability, and large-area processing adaptability. This invention features a simple process, low cost, and good reproducibility, and has promising prospects for industrial application.

The application belongs to the field of organic solar cell materials, and discloses an organic photoelectric compound based on a vinylcarbazole phosphonic acid structure and a preparation method and application thereof, the organic photoelectric compound has the following four structures: The organic photoelectric compound based on the vinylcarbazole phosphonic acid structure of the application forms firm chemical bonding with a metal oxide electrode (such as ITO or ZnO) through a phosphonic acid group, effectively passivates surface defects, and optimizes energy level alignment; meanwhile, the polymer main chain endows the material with excellent film-forming property and covering capacity, can form a uniform, dense and stable interface layer on the electrode, thereby significantly inhibiting charge recombination, improving carrier selective transmission efficiency, and enhancing the stability of the device in long-term operation and complex environment. The system provides an effective material solution for constructing an OPV device with high performance, high stability and suitable for large-area processing.

The utility model belongs to the technical field of cooling water treatment equipment, and particularly relates to an electrochemical treatment circulating cooling water device. Comprising a water tank, and a plurality of cathodes are arranged in the water tank at intervals; the top cover assembly body is arranged on the water tank, a water outlet is formed in the top cover assembly body, a plurality of anodes are arranged at the bottom of the top cover assembly body, and the anodes are inserted among different cathodes; the lower tank assembly is arranged at the bottom of the water tank, and a water inlet is formed in the lower tank assembly; and the scraper assembly is arranged in the lower box assembly. According to the electrochemical circulating cooling water electrode material and equipment structure disclosed by the utility model, the electric control ion exchange modified negative electrode and the electric control ion exchange modified positive electrode are prepared by doping the electric control ion exchange material into the metal oxide electrode and the metal sulfide electrode; the treatment effect of the circulating cooling water can be obviously improved.

The invention belongs to the technical field of ferroelectric memories, and particularly relates to an embedded electrode structure capable of effectively reducing coercive voltage of a ferroelectric domain wall memory and a preparation method of the embedded electrode structure. According to the invention, the ferroelectric film is used as a basic storage unit; the surface of the ferroelectric film is provided with an embedded electrode groove, and the groove is filled with an electrode material; and a metal or metal oxide electrode and a silicon dioxide / silicon-based or perovskite type single crystal substrate are arranged below the ferroelectric film. The embedded electrode structure can adjust the working thickness of the ferroelectric film, so that the coercive voltage of the ferroelectric domain wall memory is regulated and controlled, and the working voltage of the memory is continuously adjustable; a tip with a small curvature radius exists on the contact surface of an electrode material and a ferroelectric film in an embedded electrode structure, so that a large amount of charges are concentrated, the local electric field of the tip is enhanced, electric domain nucleation is quicker, and the working speed and working current of the memory are improved; the embedded electrode is in full contact with the conductive domain wall, so that poor contact between the electrode material and the conductive domain wall is avoided, and the reading current is greatly increased.

Provided is a ferroelectric capacitor in which an increase in coercive electric field and degradation of rewrite resistance are suppressed with a simple structure. The ferroelectric capacitor of the present invention is a ferroelectric capacitor, including: an upper electrode; a lower electrode; and a ferroelectric layer arranged between the upper electrode and the lower electrode so as to be in close contact therewith, wherein at least one electrode selected from the group consisting of the upper electrode and the lower electrode includes a composite metal oxide electrode formed so as to contain a composite metal oxide in which a second oxide is added to a conductive first oxide containing at least one metal element selected from the group consisting of In, Ga, Zn, Sn, Ru, Ir and Sr at a molar ratio smaller than that of the first oxide, the second oxide having oxygen dissociation energy, when considered as a metal oxide of one of the metal elements, which is larger by 200 KJ / mol or more, as compared to the metal oxide having the largest oxygen dissociation energy among the first oxides.

The application provides a dielectrophoresis device, comprising first electrodes arranged on one side of microfluidic channels, each microfluidic channel corresponding to one first electrode, and each first electrode being electrically connected to one first switch; and a plurality of second electrode groups arranged on the other side of the microfluidic channels, each second electrode group being electrically connected to one second switch, and each second electrode group comprising a plurality of second electrodes connected in series, and the plurality of second electrodes being respectively located in different microfluidic channels; wherein the activation and deactivation of each second electrode are controlled by the first switch of the first electrode corresponding to the microfluidic channel where the second electrode is located and the second switch of the second electrode group where the second electrode is located. The application greatly reduces the wiring complexity and the space required for wiring, and makes it possible to perform high-throughput single-cell operation in a microfluidic device based on metal / metal oxide electrodes.

The application discloses a method for realizing nitrate reduction based on anode and cathode conversion and belongs to the technical field of water pollution treatment. The method uses a transition double-metal oxide electrode as the anode and the cathode of a reduction system, and realizes a high-adsorption-energy, high-electron-transmission-performance and high-efficiency denitrification technology by regulating and controlling the low-frequency conversion of the anode and the cathode.

The invention relates to the field of sensor electrodes, and provides application of a marine electrode and a marine electric field sensor facilitating transportation, storage and monitoring, and the marine electrode and the marine electric field sensor facilitating transportation, storage and monitoring comprise a water retention shell used for storing seawater and storing the seawater in a sealed manner; the permeable shell is arranged in the water retention shell and is of a porous structure; the electrode inner core is arranged in the water permeable shell and is communicated with an external circuit through a cable lead; the metal oxide electrode is embedded into the water retention shell, the first end of the metal oxide electrode is located in the water retention shell, and the second end of the metal oxide electrode is located outside the water retention shell. The method is used for overcoming the defect that the electrodes of the ocean electric field sensor in the prior art are not beneficial to storage and transportation, and the scheme of the invention is beneficial to long-term maintenance of electrochemical activity of the sensor electrodes and is also beneficial to transportation, storage and detection.

The application discloses a homogenizing method for improving discharge voltage of a lithium-chromium-based metal oxide battery, which adopts a high-DN-value solvent and a low-density conductive agent to modify a chromium-based metal oxide electrode; the chromium-based metal oxide is mixed with dry powder of the low-density conductive agent; PVDF powder is dissolved in DMSO, and then added into the mixed dry powder mixture after mixing, so as to prepare a slurry for coating electrode sheets. The application has the beneficial effect that the chromium metal oxide is treated by the solvent DMSO with high DN value and low boiling point, the interlayer spacing of the chromium metal oxide is increased, and the bond energy of the chromium-oxygen bond is reduced, so that the embedding of lithium ions and the subsequent conversion reaction are facilitated, and the discharge voltage of the battery is improved; meanwhile, the formed porous channel structure is also beneficial to the infiltration of electrolyte, and the electrochemical performance of the battery is improved.

This invention discloses a composite metal oxide electrode material, its preparation method, and a supercapacitor, belonging to the field of capacitor technology. The preparation method includes: dissolving cobalt chloride and trisodium citrate in deionized water to prepare solution A; dissolving potassium ferricyanide in deionized water to prepare solution B; adding solution B dropwise to solution A and allowing the reaction to proceed to obtain a CoHCF precursor; calcining the CoHCF precursor to obtain the composite metal oxide electrode material. This invention utilizes a Prussian blue analogue-derived composite metal oxide to effectively enhance the pseudocapacitive properties and cycle stability of the material. Trisodium citrate is used as a complexing agent to control the metal ion release rate, enabling cobalt and iron ions to form a more stable complex. Furthermore, this invention optimizes the electrochemical performance of the electrode material by adjusting the cobalt-iron ratio, the amount of trisodium citrate, additives, and calcination, thereby improving the specific capacitance, energy density, and cycle life of the supercapacitor.

The present application relates to the technical field of fuel cells and water electrolysis, in particular to a high-entropy alloy atomic layer catalyst, a preparation method and application. The catalyst has a PGM@IGM-PGM-HEA core-shell nanocube structure, the core is a platinum group metal, the shell layer is a quinary alloy formed by 2-3 iron group metals and 2-3 platinum group metals, and the atomic ratio is 1-3:1. The preparation method includes two steps of seed preparation and IGM-PGM-HEA atomic layer growth. The catalyst is coated on a carbon-based, metal or metal oxide electrode substrate to form an electrode, which is used for hydrogen evolution reaction and hydrogen oxidation reaction. In the hydrogen evolution reaction, the activity does not decrease by more than 10% after 15000 cycles in a 0.5 mol / L sulfuric acid solution test; in the hydrogen oxidation reaction, the intrinsic activity does not decrease by more than 20% after 3000 cycles in a 0.1 mol / L KOH solution test. Compared with a commercial Pt / C catalyst, the catalyst has high catalytic activity, good stability, can effectively reduce the reaction activation energy, and has important application value.

The invention relates to a p-region metal oxide electrode doped with rare earth metal as well as a preparation method and application thereof. The p-region metal oxide electrode comprises an electrode substrate and a catalyst layer coating the outer side of the electrode substrate, the catalyst layer includes a p-region metal oxide doped with a rare earth metal. The p-region metal oxide which is moderate in CO2 binding energy, low in hydrogen evolution reaction activity and high in formic acid selectivity is selected as the catalytic layer of the electrode, and meanwhile, the p-region metal oxide is doped with rare earth metal, so that the electro-catalytic performance of the electrode is improved, and the electrode which is high and stable in catalytic activity is obtained; the electrode is suitable for electrocatalytic reduction of carbon dioxide to generate formic acid.

A process for producing a graphite-containing metal oxide electrode includes: a) providing an electrolysis cell having an electrode, a further electrode and an aqueous and / or non-aqueous carbonyl-and cyano-free solvent, b) introducing black matter and a proton source into the solvent present in the electrolysis cell, where the black matter includes graphite-supported precious metal-free metal oxides, and c) applying a voltage to the electrode and the further electrode, such that the precious metal-free metal oxides and graphite provided by means of the black matter are deposited on the electrode to produce a graphite-containing metal oxide coating on the electrode for formation of the graphite-containing metal oxide electrode. The graphite-containing metal oxide electrode is used for production of hydrogen and / or oxygen by (photo)electrochemical water splitting and to an electrolysis cell for production of hydrogen and oxygen by (photo)electrochemical water splitting.

The invention discloses a semi-filled nano porous heterostructure catalyst and a preparation method thereof, and belongs to the field of water electrolysis hydrogen production catalysts.The preparation method comprises the steps that copper-manganese alloy is subjected to acidic corrosion, heating and drying are conducted after cleaning, sintering is conducted in an aerobic environment, copper is deposited in holes of obtained Cu-Mn metal oxide in an incomplete filling mode through a three-electrode deposition system, and the semi-filled nano porous heterostructure catalyst is obtained. The semi-filled nano porous heterostructure catalyst is obtained; in a three-electrode deposition system, an electrolyte is copper sulfate, sulfuric acid is used for adjusting the electrolyte to be acidic, a working electrode is a Cu-Mn metal oxide, and a counter electrode is copper. According to the invention, a high-conductivity copper crystal network is constructed at the pore channel of the nano-porous structure, so that the overall conductivity of the electrode is improved, the characteristic of high specific surface area of the electrode is well retained, the mechanical strength is improved, and the brittleness of the Cu-Mn metal oxide electrode is improved. The modified electrode shows excellent catalytic activity and stability in water electrolysis application, and an innovative solution is provided for designing a high-performance and low-cost electro-catalysis electrode.

The application belongs to the field of electrochemical water treatment, and particularly relates to an ultra-stable high-entropy metal oxide electrode with a breakthrough design, which is particularly suitable for application in an alternating current reverse electrode environment. By carefully adjusting the proportions of various metal elements and adopting high-energy laser direct energy deposition, plasma and ceramicization processes, a high-entropy oxide material with complex chemical composition and highly stable structure is formed. The electrode exhibits excellent electrochemical stability and corrosion resistance in an alternating current field, can be stably operated for a long time under the condition of frequent polarity reversal, effectively prevents the occurrence of cathode fouling, and ensures that the electrocatalytic performance does not obviously decay. The unique structural design provides a high-performance and long-life electrode material solution for the field of water pollution control, especially for the treatment of high-hardness and high-salinity industrial wastewater.

The invention discloses a composite metal oxide electrode material, a preparation method thereof and a supercapacitor, and belongs to the technical field of capacitors. The preparation method comprises the following steps: dissolving cobalt chloride and trisodium citrate in deionized water to prepare a solution A; dissolving potassium ferricyanide in deionized water to prepare a solution B; dropwise adding the solution B into the solution A, and standing for reaction to obtain a CoHCF precursor; and calcining the CoHCF precursor to obtain the composite metal oxide electrode material. The pseudocapacitance characteristic and cycling stability of the material are effectively enhanced by using the composite metal oxide derived from the Prussian blue analogue, and the release rate of metal ions is controlled by using trisodium citrate as a complexing agent, so that cobalt and iron ions form a more stable complex. In addition, the electrochemical performance of the electrode material is optimized by means of adjusting the ratio of cobalt to iron, the dosage of trisodium citrate, additives, calcination and the like, so that the specific capacitance, the energy density and the cycle life of the supercapacitor are improved.

The present application belongs to the field of electrochemistry, and particularly relates to a titanium-based metal oxide electrode containing a double-layer glow plasma tantalum permeation gradient intermediate layer and a preparation method thereof. The main structure of the electrode comprises a titanium base at the bottom, a mixed metal oxide electrocatalytic layer on the surface, and a double-layer glow plasma tantalum permeation gradient intermediate layer between the two. The electrode preparation method is to prepare a tantalum permeation gradient alloy layer on the surface of a pretreated titanium base by a double-layer glow plasma alloying method, and then prepare a mixed metal oxide electrocatalytic coating on the tantalum permeation intermediate layer by a thermal decomposition method. The tantalum permeation gradient intermediate layer not only has good conductivity and adhesion, but also can significantly enhance the corrosion resistance and stability of the electrode, effectively prevent the passivation of the titanium base, so that the electrode can still have a long service life under a large current density and a strong oxygen evolution environment, meet the needs of engineering, and have a wide application prospect.

This invention discloses a method for removing nitrates from water using manganese-induced layered metal oxide electrode membrane capacitive deionization, relating to the field of water treatment technology. The key technical point is: based on CuAl-LMO, Mn... x CuAl-LMO materials were used in membrane capacitor deionization (MCDI) desalination. Studies showed that when the Mn / Cu / Al ratio was 0.2:2.0:1.0, Mn... x CuAl-LMO has the highest specific capacitance (1695.15 F·g). ‑1 When the voltage is 1.2V and the initial KNO3 concentration is 2000 mg·L⁻¹ ‑1 At that time, Mn 0.2 The maximum salt adsorption capacity of CuAl-LMO can reach 115.74 mg·g. ‑1 The combined electrochemical and physical characterization results show that appropriate Mn doping of CuAl-LMO can effectively improve the structural properties of CuAl-LMO, thereby enhancing the desalination effect of MCDI. This provides a theoretical basis for layered metal oxides to be used as MCDI electrodes in practical applications.

The application relates to the technical field of capacitors, in particular to an electrode material based on carbon metal oxide and a capacitor. The electrode material is made of MOFs and benzoxazine monomers, and the weight ratio of the MOFs and the benzoxazine monomers is 1-5:1-5. The prepared electrode material has a higher specific capacitance value, a higher capacitance retention rate and good cycle stability.