97 results about "Electro catalyst" patented technology

The invention relates to a Bayesian optimization-based ruthenium, tin and indium doped lithium-rich manganese-based electrocatalyst screening method, electronic equipment and a storage medium, and the method comprises the following steps: generating a uniform ruthenium, tin and indium doped lithium-rich manganese-based material data set based on Dirac distribution, and generating a doped structure through element replacement; calculating hydroxyl adsorption energy and extracting descriptors to construct a data set to train a machine learning model; performing cell expansion operation on the initial electrocatalyst structure, predicting hydroxyl adsorption energy of each adsorption site, and mapping adsorption energy deviation into current density characterization component activity in combination with Boltzmann distribution; selecting an initial component based on the obtained component activity information, and constructing an agent model by utilizing Bayesian optimization; and determining a to-be-sampled component through an expectation improvement strategy, sampling and updating the agent model, and outputting an optimal doping proportion. Compared with the prior art, the method has the advantages that the ruthenium, tin and indium doped lithium-rich manganese-based electrocatalyst with excellent catalytic performance can be efficiently screened out, and the experiment cost is reduced.

The present invention relates, in general, to a system and method for sequentially energizing heating elements in an electric catalyst unit for ammonia dissociation on-board a vehicle. The present invention utilizes output temperature readings at various sections within the electric catalyst unit, and sequentially energizes corresponding heating elements only if the output temperature of an upstream section is below a threshold temperature required for ammonia dissociation to occur. By sequentially energizing heating elements as needed, versus fully energizing every heating element, the present invention mitigates the risk of degradation and failure of the vehicle power system and other electrical components in the vehicle.

The invention relates to a flexible breathable zinc air battery based on a polypropylene non-woven fabric and a preparation method thereof. The preparation method comprises the following steps: carrying out hydrophilic treatment on the polypropylene non-woven fabric; immersing a hydrophilic polypropylene non-woven fabric into the carbon nanotube dispersion liquid, and drying to obtain a carbon nanotube non-woven fabric; the method comprises the following steps: coating a carbon nanotube non-woven fabric with ink containing a copper / cobalt double-atom doped oxygen electrocatalyst, and drying to obtain a breathable air cathode; the carbon nano tube non-woven fabric is electroplated and loaded with zinc, and an air-permeable galvanized anode is obtained; the preparation method comprises the following steps: immersing hydrophilic polypropylene non-woven fabric into a polymer gel solution, taking out the hydrophilic polypropylene non-woven fabric to form non-woven fabric-based polymer gel under ultraviolet irradiation, soaking the non-woven fabric-based polymer gel into a mixed solution of KOH and Zn (Ac) 2, and taking out the non-woven fabric-based polymer gel to obtain a non-woven fabric-based alkaline gel polymer electrolyte; and (3) sequentially laminating and pressing the anode, the polymer electrolyte and the cathode, and then packaging. The flexible, breathable, waterproof and tailorable characteristics of the zinc-air battery are realized.

The invention relates to an iron single atom / zinc atom cluster-nitrogen-carbon composite material as well as a preparation method and application thereof. Zinc nitrate hexahydrate, ferric acetylacetonate and dimethylimidazole are used as raw materials, and the iron single atom / zinc atom cluster-nitrogen-carbon composite material FeSA / ZnAC-N-C is prepared through stirring and thermal shock at room temperature. The preparation method comprises the following steps: a, stirring at room temperature to prepare an iron-zinc bimetallic zeolite imidazole organic framework FeZn-ZIF precursor; and b, carrying out thermal shock on the precursor to prepare the FeSA / ZnAC-N-C. The FeSA / ZnAC-N-C shows excellent oxygen reduction reaction (ORR) catalytic performance, the half-wave potential is 0.90 V, the Tafel slope is 46.4 mV dec-1, and the performance exceeds that of commercial Pt / C. Besides, the zinc-air battery constructed by taking FeSA / ZnAC-N-C as the air cathode can reach the maximum power density of 161.5 mW cm <-2 > and the specific discharge capacity of 792.7 mAh g <-1 >, can stably circulate for 1500 circles, and shows good practical application value. The preparation method can be expanded to preparation of other monatomic / atomic cluster composite materials, and a new idea is provided for development of efficient electrocatalysts.

This invention discloses a C / MoS2-Co9S8-Co composite electrochemical catalyst, its preparation, and application. This material is synthesized using ammonium tetrathiomolybdate, cellulose, and a metal cobalt salt via a coating-pyrolysis method. The resulting composite material effectively enhances the electrocatalytic activity for oxygen evolution and reduction, making it a highly efficient electrocatalyst for oxygen evolution and reduction reactions.

Systems and methods described herein relate to assessing the quality of electrocatalyst-loaded disk electrodes. In one embodiment, a system that assesses the quality of electrocatalyst-loaded disk electrodes receives one or more images of a disk electrode on which an electrocatalyst has been deposited to produce an electrocatalyst-loaded disk electrode. The system also processes the one or more images using a machine-learning-based model trained to generate a prediction of a Koutecky-Levich (K-L) quality assessment of the electrocatalyst-loaded disk electrode. The system also accepts or reject inclusion of the electrocatalyst-loaded disk electrode in an electrochemical experimentation process based, at least in part, on the prediction.

The invention discloses an electrocatalyst activity attenuation prediction method based on microdynamics, and relates to the field of electrochemical catalyst.According to the electrocatalyst activity attenuation prediction method based on microdynamics, an electrocatalytic reaction and an inactivation reaction are dynamically coupled in a microdynamics model for the first time, the limitation of traditional thermodynamic stability analysis is broken through, and the activity attenuation process under the working condition can be truly reflected. By introducing a residual active site coverage variable and adopting quasi-steady-state approximation, the modeling and solving problems of a dynamic process of continuous loss of active sites are successfully solved, and a complex rigid differential equation set is simplified into an analyzable linear problem. The method not only can predict a stability attenuation curve, but also can quantitatively diagnose key steps influencing the service life through half-life period control degree analysis, realizes crossing from'phenomenon prediction 'to'mechanism interpretation' and'reverse design ', and provides a powerful theoretical tool for rationally designing a high-stability electrocatalyst.

The invention is applicable to the technical field of environmental engineering and groundwater remediation, and particularly relates to a method for remediating antibiotic-polluted groundwater based on a stabilized piezoelectric material, which comprises the following steps: preparing piezoelectric catalyst powder; preparing a piezoelectric catalytic fluid; determining groundwater remediation parameters through experimental simulation, wherein the groundwater remediation parameters comprise injection parameters and ultrasonic parameters; constructing a reaction area, and injecting the piezoelectric catalytic fluid into the polluted area based on the injection parameters; an ultrasonic generating device is arranged above the polluted area; and transmitting ultrasonic waves to the polluted area to finish groundwater remediation. On the premise that the stratum structure is not damaged, long-distance effective migration of the catalyst in the porous layer and precise construction of the in-situ permeable reaction area are achieved, the engineering problem that large-scale excavation or production halt treatment cannot be conducted in the pharmaceutical and chemical industrial park is solved, and harmony of underground water remediation and safe production of the park is achieved.

The application relates to a ligand-regulated CuCe-MOF catalyst and a preparation method and application thereof in an electrocatalytic CO2 methane production reaction, and the preparation method comprises the following steps: mixing a Ce solution, an organic ligand solution and a structure directing agent to obtain a mixed solution; the organic ligand is terephthalic acid, 1,4-naphthalene dicarboxylic acid, diphenyl dicarboxylic acid or triphenyl dicarboxylic acid; the mixed solution is centrifuged and dried to obtain a cerium-based metal organic framework powder; the cerium-based metal organic framework powder is dispersed in a third solvent, ultrasonated, and soluble Cu salt is added, and after stirring, the third solvent is volatilized by heating to obtain the CuCe-MOF catalyst. The CuCe-MOF is prepared by using the organic ligand with a single benzene ring, a double benzene ring and a triple benzene ring, the dual synergistic optimization of ligand electronic effect and protonation efficiency is realized, the methane selectivity is greatly improved in the CO2 electro-reduction, and a brand-new synergistic regulation strategy is provided for the structural design and performance optimization of a CO2 RR electro-catalyst.

The invention relates to the technical field of blood glucose detection, and particularly discloses a blood glucose monitoring method based on the content of glucose in saliva, which comprises the following steps: contacting a pretreated sample with a monitoring system, and connecting with an electrochemical workstation through the monitoring system, setting the working potential of the monitoring system through an electrochemical workstation, collecting the electric signal change of the monitoring system, and calculating the glucose content in the saliva according to the electric signal change so as to deduce the blood glucose level; and the monitoring system comprises a Ni5P4-FeP / Ti electrocatalyst. By adopting the technical scheme, the saliva pH environment can be met, the detection limit and precision meet the accurate glucose detection requirement, and the detection operation is simple.

Hybrid electrocatalyst layers for use in an electrochemical cell and processes for making the same are described. The hybrid electrocatalyst layers include at least one ion-conducting layer and at least one nonionic conductive catalyst layer. The processes for making the hybrid electrocatalyst layers include a sintering step, which provides greater durability of the hybrid electrocatalyst layers.

The invention relates to the technical field of electrocatalytic materials, in particular to a SnSe piezoelectric catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dispersing selenium powder in deionized water, adding NaBH4 powder to obtain a selenium source precursor solution, dispersing sodium ascorbate in deionized water, adding anhydrous SnCl2 powder to obtain a tin source precursor solution, and adding the selenium source precursor solution into the tin source precursor solution to obtain a mixed solution; the pH value of the mixed solution is adjusted to 2-7, then the mixed solution is subjected to a hydrothermal reaction, and the SnSe piezoelectric catalyst is obtained through filtering and drying in sequence. In a one-step hydrothermal system, through coordinated regulation and control of pH and hydrothermal temperature, coordinated regulation of the SnSe material in the aspects of nucleation, growth, valence evolution and defect structure is realized, a novel piezoelectric catalytic material with a mixed valence structure and nanorod morphology is successfully constructed, the piezoelectric polarization capability, the carrier separation efficiency and the ROS generation capability of the material are remarkably enhanced, and the preparation method is simple and easy to implement. And excellent organic pollutant degradation performance is obtained.

The invention belongs to a functional composite material, and provides a RuO2 / C functional composite material as well as a preparation method and application thereof in order to solve the technical problem of low CO2 conversion efficiency of a thermoelectric catalyst of an existing CO2 / H2 fuel cell cathode. The RuO2 / C functionalized composite material comprises carbon spheres, RuO2 particles are attached to the surfaces of the carbon spheres, the surfaces of the RuO2 particles are coated with carbon layers, and unpaired electrons exist on the surfaces of the carbon layers and the surfaces of the carbon spheres. According to the composite material disclosed by the invention, the surfaces of the carbon layer and the carbon spheres have rich unpaired electrons, and CO2 can be effectively adsorbed and activated in a specific CO2 / H2 fuel cell thermal field environment.

The invention discloses a method for constructing high-dispersion high-entropy metal oxide nano-particles by using ligand synergistic anchoring and application of the high-dispersion high-entropy metal oxide nano-particles, hexagonal boron nitride is used as a carrier, stripping is realized through thermal expansion-liquid nitrogen quenching circulation, nitrogen defects are introduced, a synergistic coordination field is formed by using organic polydentate ligands and defect sites, and the high-dispersion high-entropy metal oxide nano-particles are obtained. The preparation method comprises the following steps of: performing synchronous anchoring and uniform dispersion on a plurality of metal ions by virtue of a functional carrier, performing mixing-ball milling activation treatment on a plurality of metal salts and the functional carrier, and combining multi-stage programmed pyrolysis of low-temperature confinement nucleation-high-temperature interface bonding-structure stabilization, so as to form the high-entropy metal oxide nano-particles with the particle size of about 10-100nm under the regulation and control of a dynamic atmosphere. According to the method, metal precursor migration, particle sintering and element segregation can be effectively inhibited, and high-dispersion loading and stable interface construction of the high-entropy metal oxide are achieved. The obtained catalytic material shows relatively high conversion rate and ammonia selectivity in a reaction for preparing ammonia by electro-catalysis nitrate reduction, and is suitable for preparing a high-performance electro-catalyst.

The application discloses a Cu-As nanometer composite electrocatalyst with cross dispersion among different components and a one-step electrodeposition preparation method thereof, and is characterized by the following method: a three-electrode system is used, a saturated mercury electrode is used as a reference electrode, a platinum sheet is used as a counter electrode, and carbon cloth is used as a working electrode; an electrolyte contains HCl, CuCl2.2H2O and NaAsO2; a chronocoulometric electrochemical technology is used for electrodeposition at a constant potential; the deposited material is sequentially rinsed with deionized water and anhydrous ethanol; and finally, drying is performed to obtain the Cu-As nanometer composite electrocatalyst with cross dispersion among different components. The application realizes controllable preparation of the nanometer composite electrocatalyst with controllable cross dispersion of Cu and As components, and has important significance for simplifying a process, improving material performance and promoting the development of electrochemical energy technology.

The application discloses a preparation method of an unsaturated coordination boron-doped nickel-based metal organic framework material, which comprises the following steps: (1) stirring and dissolving a nickel salt, 1,4-benzenedicarboxylic acid and 4-carboxyphenylboronic acid in a solvent to obtain a precursor solution; and (2) adding triethylamine into the precursor solution obtained in the step (1) to obtain the unsaturated coordination boron-doped nickel-based metal organic framework material. The application further discloses the unsaturated coordination boron-doped nickel-based metal organic framework material prepared by the preparation method and application of the unsaturated coordination boron-doped nickel-based metal organic framework material in an electric reduction O2 production H2O2 reaction. The application of the catalytic material as an electric catalyst in the electric reduction O2 production H2O2 reaction in an alkaline electrolyte. The catalytic material exhibits excellent two-electron electric reduction O2 production H2O2 activity and selectivity in the alkaline electrolyte, and has good catalytic stability.

The invention discloses an oriented design and screening method of a nitrogen-doped MXene supported non-noble electrocatalyst for a hydrogen fuel cell, and the oriented design and screening method comprises the following steps: 1, by taking Ti3C2O2 MXene as a carrier, selecting nitrogen atoms to replace and dope through lattice carbon sites, and constructing a series of N / C proportion electrocatalyst models; and 2, carrying out thermodynamic stability and catalytic activity analysis on the series of N / C ratio electrocatalyst models, and screening out an electrocatalyst model with optimal stability and activity to obtain the nitrogen-doped MXene supported non-noble electrocatalyst. According to the directional design and screening method, Ti3C2O2 MXene is used as a carrier to construct a series of N / C proportional electrocatalyst models doped with nitrogen, and two indexes of thermodynamic stability and catalytic activity are combined for common screening, so that the research and development period is effectively shortened, both activity and stability are considered, and the method is suitable for the field of preparation of electrochemical catalysts.

The invention relates to a method for the selective electro-oxidative fragmentation of lignin using an electrochemical system, comprising the following steps: (i) synthesis of a nickel-cobalt electrocatalyst; (ii) obtaining an anode coated with the electrocatalyst; and (iii) selective fragmentation and oxidation of solubilised lignin in an electrochemical reactor comprising said anode, in which vanillic acid and syringic acid are obtained as preferred products.

The present application relates to a kind of for detecting colloidal semiconductor quantum dot spectroelectrochemical device and method.The device combines electrochemical workstation and spectroscopic detection system, for real-time monitoring the structural change of molecule and material in electrochemical reaction process.The core technology includes the accurate control of the redox state of sample, and obtains key molecular information by various spectroscopic analysis means (such as ultraviolet-visible absorption spectrum, infrared spectrum, raman spectrum etc.).Device design adopts modular structure, includes reference electrode, counter electrode and working electrode, to ensure the stability of reaction and the reliability of data.The method is suitable for the identification of electrocatalyst active site, the electronic structure regulation of material, the research of interface chemical reaction mechanism and the like.

The present invention discloses an electrocatalyst for bifunctional oxygen reaction at the air cathode interface comprising manganese-cobalt-based bimetallic spinel oxide deposited on N-doped 3D porous entangled graphene (NEGF). The invention further provides fabricated all-solid-state rechargeable zinc-air batteries (ZABs) comprising said electrocatalyst coated air cathode that delivers a higher power density with stable cyclic stability.

In an aspect, an electrochemical cell comprises: a positive electrode; a negative electrode; and a solid state electrolyte in ionic communication with the positive electrode and the negative electrode; wherein: the electrolyte is characterized by formula (FX1): MPS3 (FX1); wherein M is one or more metal cations and optionally metal cation vacancies; and wherein at least one of said one or more metal cations is a divalent cation; the electrolyte is characterized by a divalent ion conductivity; and the electrolyte is electrically insulating. The solid state electrolyte is optionally not an electrocatalyst material or does not function as an electrocatalyst in the electrochemical cell during operation (e.g., charging and / or discharging) of the electrochemical cell. The solid state electrolyte is optionally not an electrode or does not function as an electrode in the electrochemical cell during operation (e.g., charging and / or discharging) of the electrochemical cell.

The present invention provides an electrochemical cell electrode that appropriately possesses electronic conductivity, catalytic function, and ionic conductivity. [Solution] The electrochemical cell electrode 10 disclosed herein includes an electron conduction portion 12 mainly composed of an electron conduction catalyst and an ion conduction portion 14. A first layer 10a is formed in the region including the upper surface 10U of the electrochemical cell electrode 10. This first layer 10a includes the electron conduction portion 12 and substantially does not include the ion conduction portion 14. On the other hand, a second layer 10b is formed in the region including the lower surface 10D of the electrochemical cell electrode 10. In the width direction X of this second layer 10b, the electron conduction portion 12 and the ion conduction portion 14 are formed alternately. With this configuration, materials can be arranged according to the differences in required performance in the thickness direction, so that electron conductivity, catalytic function, and ion conductivity can be appropriately exhibited.

The present invention relates, in general, to a system and method for focusing gas distribution through at least one three-dimensionally (3D) printed lattice heating elements within an electric catalyst unit to promote ammonia dissociation. The present invention allows gaseous ammonia to be continuously heated under turbulence as it flows through non-linear paths within a 3D printed lattice heating element. The lattice structure of the heating element provides a balance between surface area and heat dissipation, allowing the heating elements to reach a suitable temperature to perform ammonia dissociation, but which are not oversaturated with heat which could result in failure or melting of the heating element.

The invention belongs to the technical field of microbial fuel cell carbon-based cathode biological materials, and particularly discloses a preparation method and application of an anthocyanin molecule functionalized escherichia coli electrocatalyst. The electrocatalyst of anthocyanin molecule functionalized Escherichia coli is obtained by adopting the following method: S1, centrifuging a biologically safe Escherichia coli culture solution to obtain bacterial precipitate, washing, suspending the bacterial precipitate in an aqueous solution of natural pigment anthocyanin, and uniformly mixing to obtain a bacterial solution; and S2, incubating the bacterial solution in the step S1, then carrying out centrifugal separation, retaining the precipitate, and washing the thallus precipitate to obtain the final anthocyanin molecule functionalized escherichia coli electrocatalyst. The preparation method is simple, rapid, efficient, low in reaction cost, mild in reaction condition and environmentally friendly, anthocyanin molecules effectively regulate and control the catalytic activity, the adsorption and activation capacity of an active center to O2 is promoted, the electro-catalytic performance is remarkably improved, and the application potential is wide.

The invention discloses an anti-pollution and sterilization integrated non-co-reactant electrochemical luminescence (ECL) sensor for detecting staphylococcus aureus in an aquatic product as well as a preparation method and an application method of the anti-pollution and sterilization integrated non-co-reactant ECL sensor, and the anti-pollution and sterilization integrated non-co-reactant ECL sensor is suitable for ultra-sensitive detection of the staphylococcus aureus. The integrated hydrogel illuminant is characterized in that chitosan and citral are subjected to a Schiff base reaction to form a three-dimensional network in a cross-linking manner, and tetrakis (4-hydroxyphenyl) porphyrin (THPP) and luminol are introduced into the three-dimensional network. According to the present invention, THPP is adopted as a high efficiency oxygen evolution reaction (OER) electrocatalyst to generate reactive oxygen species (ROS) to replace the traditional hydrogen peroxide so as to be adopted as a co-reactant, such that the ECL signal of luminol is significantly enhanced; the hydrogel has excellent hydrophilicity and antibacterial activity, can significantly reduce non-specific adsorption, realizes anti-pollution detection, and realizes sterilization treatment after detection. By combining a DNA Walker signal amplification strategy, the sensor has a linear response to S. aureus within the range of 101-108 CFU / mL, the detection limit is as low as 0.39 CFU / mL, and the recovery rate of 97.3%-111.85% is obtained in a marine product actual sample. The device has the advantages of being simple in structure, sensitive in detection, high in anti-interference capacity, capable of achieving on-site rapid detection and the like, and is suitable for the fields of food safety, environment monitoring and clinical pathogenic bacterium detection.

The invention discloses preparation of a Ni-based catalyst and a method for electrooxidation of 5-hydroxymethylfurfural (HMF) at low temperature and high alkali concentration. The electrocatalyst with a novel structure is prepared, corresponding HMF electrooxidation performance characterization is carried out, and meanwhile conversion of Ni (OH) 2 to a main active species NiO (OH) under the electrochemical working condition is disclosed. The preparation method comprises the following steps: using hydrophobic carbon paper (CP) as a substrate; the precursor solution is a 100 mM nickel nitrate aqueous solution; and in a three-electrode system, under the condition that the constant potential is-0.8 V vs.RHE, continuous electro-deposition is carried out for 600 s. And finally, thoroughly cleaning the catalyst with deionized water, and drying the catalyst in a vacuum oven at 60 DEG C overnight to obtain the Ni / CP catalyst. The electrolysis method comprises the following steps: reducing the temperature to maintain the stability of the HMF while increasing the alkali concentration and accelerating the reaction kinetics, and electrolyzing the HMF under high substrate concentration.

The application discloses a nitrogen and boron doped carbon fiber catalyst and a preparation method and application thereof, and belongs to the field of oxygen reduction electrocatalyst preparation. Polyacrylonitrile (PAN) and boric acid are dissolved in an organic solvent to obtain a spinning slurry. The spinning slurry is used to prepare a fiber structure catalyst precursor by using an electrostatic spinning machine, and then the catalyst precursor is subjected to high-temperature crosslinking treatment in air and high-temperature carbonization treatment in a reducing gas to obtain nitrogen and boron doped carbon fiber which can be used as an electrocatalyst for catalyzing hydrogen peroxide production. The fiber network structure provides a high specific surface and good electrical conductivity, which is conducive to improving the electrochemical performance of the material. The nitrogen and boron doped carbon fiber catalyst prepared by the application has high hydrogen peroxide selectivity, and the process is simple and the conditions are mild.

The invention discloses a piezoelectric catalyst, a preparation method, application of the piezoelectric catalyst in sewage treatment and a professional application system.The Bi4Ti3O12 piezoelectric catalyst loaded with cation Ti vacancies is prepared through Bi (NO3) 3.5 H2O and Ti (OC4H9) 4 and applied to a special sewage treatment system, a light-pressure catalytic circulation system capable of operating cooperatively and independently is constructed, and the piezoelectric catalyst is applied to the sewage treatment system. And all-weather operation capability is realized. The optical unit and the piezoelectric unit of the special system are independent in structure, functional coupling is achieved through H2O2 directional transmission, and the carrier separation and migration process is optimized step by step. And the problems that the catalyst is difficult to recover and the hydrodynamic response is weak are solved. According to the invention, solar energy and water flow mechanical energy are utilized to realize high-efficiency low-carbon treatment from in-situ oxidant generation, instantaneous activation and deep mineralization, and a stable and economic solution is provided for treatment of refractory organic pollutants.

A photo-catalyst (EP) is regarded as an alternate method to replace the plasma chemical process and as an additional catalytic processing scheme on top of a micro- or nano-structured catalyst (EC) and electro-catalyst (EV). The potential energy reduction that results from the effect of photo-enhanced electro-catalyst (PEEC) is significant.