174 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.

Provided is an electroconductive sheet 10 comprising an aromatic polyamide pulp, a fluororesin, a carbon-based electroconductive substance, and an electrode catalyst. Also provided is a production method for the electroconductive sheet, the method comprising: a step X1, in which a slurry X1 including an aromatic polyamide pulp, a fluororesin, a carbon-based electroconductive substance, and an electrode catalyst is prepared and the slurry X1 is formed into a sheet by wet laying to obtain an electroconductive-sheet precursor X1; and a step Y1, in which the electroconductive-sheet precursor X1 is hot-pressed in air at a temperature of 100-350°C and a linear pressure of 10-50 N / m and thereafter fired in an inert gas at 200-500°C. Use may be made of a method in which either one of a slurry X2-1 containing no electrode catalyst and a slurry X2-2 containing the electrode catalyst is formed into a sheet by wet laying to obtain the electroconductive-sheet precursor, and the other slurry is formed into a sheet by wet laying on one surface of the electroconductive-sheet precursor.

The invention discloses a multi-metal heterostructure electrocatalyst, a preparation method and application of the multi-metal heterostructure electrocatalyst in plastic recovery, and belongs to the field of electrochemical catalyst.The catalyst comprises hydroxide and a metal heterostructure which grow on a foam metal matrix, and according to the method, soluble metal salt is used as a raw material; the multi-metal heterostructure electrocatalyst is prepared by adopting a two-step electrodeposition method. The catalyst can be applied to the process of recycling PET-derived EG in an alkaline solution through electro-catalysis upgrading, has extremely low overpotential and relatively high Faraday efficiency when being used for electro-oxidation of PET hydrolysate, and has very good catalytic stability. The multi-metal heterostructure electrocatalyst prepared by the method can also be applied to upgrading and recycling of other plastic derivatives, and has a good application prospect in the field of upgrading and recycling of the plastic derivatives.

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 discloses a FeNi-LDH / L-NCP / NF composite material and a preparation method and application thereof, and belongs to the technical field of electrocatalyst preparation. The preparation method of the FeNi-LDH / L-NCP / NF composite material provided by the invention comprises the following steps: adding foamed nickel into an aqueous solution of Co (NO3) 2.6 H2O and 2-methylimidazole, and reacting at room temperature to obtain an L-Co-ZIF / NF precursor; the L-Co-ZIF / NF precursor and sodium hypophosphite are subjected to calcination treatment, and L-NCP / NF is obtained; and adding the L-NCP / NF into a mixed aqueous solution of Fe (NO3) 3.9 H2O, Ni (NO3) 3.6 H2O, urea and NH4F, and carrying out a hydrothermal reaction so as to obtain the FeNi-LDH / L-NCP / NF composite material. A unique three-dimensional interface is formed through a layered structure of FeNi-LDH and a network structure of L-NCP, an efficient electron transmission channel is formed, desorption and release of hydrogen can be promoted while protons can be captured, HER and OER in an alkaline medium both show excellent electrocatalytic activity, and meanwhile, the electrochemical performance of the composite material is improved. The composite material has excellent cycling stability after 1000 times of cycling, and has a wide application prospect in hydrogen evolution reaction, oxygen evolution reaction and complete water splitting reaction.

The present invention relates, in general, to systems and methods for generating hydrogen from ammonia on-board vehicles, where the produced hydrogen is used as fuel source for an internal combustion engine. The present invention utilizes an electric catalyst unit operating in series with a heat exchange catalyst unit. The electric catalyst unit is used to initiate an ammonia cracking process on-board during a cold start or low load operating condition of the internal combustion engine, where the ammonia cracking process occurs in the heat exchange catalyst unit once exhaust gas from the internal combustion engine has been heated to a threshold temperature suitable to perform the ammonia cracking process.

Provided is an electrode exhibiting high oxygen generating electrode catalytic activity as compared with conventional electrodes using manganese-based oxide as an oxygen generating electrode catalyst.

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.

Ternary heterostructure comprising Ni2P, MoNiP2, and MoP, wherein the ternary heterostructure comprises crystalline regions and amorphous regions useful as an electrocatalyst for alkaline hydrogen evolution reaction; a cathode and an electrochemical cell including the same; and methods of preparation and use thereof.

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.

This electrode catalyst ink contains an ionomer (A), an electrode catalyst (B) containing at least one of a non-noble metal and a non-noble metal oxide, and a solvent (C). The solvent (C) contains a ketone-based solvent and water, and the volume ratio (water / ketone-based solvent) of the water to the ketone-based solvent is in the range of 0.05 to less than 0.55.

The present invention relates, in general, to systems and methods for generating hydrogen from ammonia on-board vehicles, where the produced hydrogen is used as fuel source for an internal combustion engine. The present invention utilizes an electric catalyst unit operating in series with a heat exchange catalyst unit. The electric catalyst unit is used to initiate an ammonia cracking process on-board during a cold start or low load operating condition of the internal combustion engine, where the ammonia cracking process occurs in the heat exchange catalyst unit once exhaust gas from the internal combustion engine has been heated to a threshold temperature suitable to perform the ammonia cracking process.

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.

An electrochemical system comprising at least one half-cell (1, 100) adapted for holding a first electrolyte, a first electrocatalyst (10) arranged on a current collector (11) forming a first working electrode, and a first auxiliary electrode material (12) arranged on a second current collector (13), and optionally a second half-cell (2, 200) adapted for holding a second electrolyte, a second electrocatalyst (20) arranged on a current collector (21) forming a second working electrode, and a second auxiliary electrode material (20) arranged on a current collector (21), wherein the working electrode and the auxiliary electrode are connected to an external circuit including a power supply (300) and a control unit (400), and wherein the polarity of the power supply determines whether the working electrode acts as a cathode or an anode, thus creating a cathodic or an anodic half-cell. A method for electrochemical production of chemicals and gases, in particular hydrogen, using said cell or system of cells.

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.

The invention discloses a piezoelectric heterojunction catalyst for producing hydrogen peroxide as well as a preparation method and application thereof, and belongs to the technical field of piezoelectric catalysis. The method comprises the following steps: mixing NH4VO3 and Na2MoO4. 2H2O, and dissolving the mixture in a NaOH solution to prepare a mixed solution A; bi (NO3) 3.5 H2O is dissolved in diluted HNO3, and a mixed solution B is prepared; mixing the mixed solution A with the mixed solution B to obtain a suspension; adding sodium dodecyl benzene sulfonate into the suspension liquid, adjusting the pH value of the suspension liquid to 6.5-7.5, then stirring, finally carrying out hydrothermal reaction, washing the obtained product, and drying to obtain the BiVO4 / Bi2MoO6 heterojunction piezoelectric catalyst. The heterojunction catalyst is in an ultrathin and dispersed nanosheet shape, and can generate stronger piezoelectric response; meanwhile, more active sites can be exposed through the nanosheet morphology, piezoelectric catalytic reaction is facilitated, and the technical problems that a heterojunction catalyst prepared through an existing preparation technology is weak in piezoelectric response and active sites, and high-yield hydrogen peroxide is difficult to produce are solved.

The invention discloses a preparation method and application of a covalent organic framework material containing imine bonds and benzoxazole rings in different proportions. The preparation method comprises the following steps: by taking amido and aldehyde group as construction units, adjusting the feeding proportion of a third monomer, quickly freezing in a liquid nitrogen bath, carrying out freezing-unfreezing circulating degassing, reacting in a water-free and oxygen-free environment, and after the reaction, filtering and cleaning, Soxhlet extraction, washing and freeze-drying to obtain the covalent organic framework material. Wherein different molecular construction units are beneficial to regulating and controlling the adsorption strength of an oxygen intermediate in an electrochemical process, so that an energy barrier in an electro-catalysis OER process is changed, and the catalytic activity of an electro-catalyst is improved. The preparation method is simple and has potential application prospects in the field of electrochemical catalysis.

The present invention relates to a conductive catalyst, a method for preparing same, and a method for producing hydrogen and synthetic gas using same. The conductive catalyst may comprise: a structure having a first-1 particle diameter with an average particle diameter of 700-1200 ㎛, the structure including a porous support and an active metal supported on the porous support; and a high-temperature conductive material having a second-1 particle diameter, or may comprise: a structure having a first-2 particle diameter and including a porous support and an active metal supported on the porous support; and a high-temperature conductive material having a second-2 particle diameter, the high-temperature conductive material being mixed with the structure, wherein the structure and the high-temperature conductive material may each independently have a pellet form, and the first-2 particle diameter and the second-2 particle diameter may be 200-700 ㎛.

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 discloses a preparation method and application of a dimensionality-designable molybdenum disulfide / molybdenum dioxide heterojunction. According to the method, a one-step two-stage chemical vapor deposition strategy is adopted, and highly controllable synthesis of the molybdenum disulfide / molybdenum dioxide heterojunction is achieved. Compared with a traditional two-step chemical vapor deposition or mechanical stripping method, the method has the advantages that extra steps do not need to be introduced, and preparation of the wafer-level and high-quality molybdenum disulfide / molybdenum dioxide heterojunction can be achieved. Molybdenum disulfide / molybdenum dioxide heterojunctions with different morphologies can be accurately regulated and controlled by regulating and controlling the concentration of the metal source precursor, so that preparation of molybdenum disulfide / molybdenum dioxide heterojunctions with different dimensions is realized, and the requirements of diversified application scenes on heterojunction functionalization are met. Besides, experimental results show that the prepared heterojunction shows excellent electro-catalytic performance in the field of electro-catalysis, and important experimental basis and theoretical basis are provided for design of high-performance electro-catalysts.

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 present invention provides a method of preparing an electrocatalyst ink, the method comprising a step of contacting a dispersion with a base metal-binding agent.

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.

A ternary heterostructure comprising Ni2P, MoNiP2 and MoP wherein the ternary heterostructure comprises a crystalline region and an amorphous region, which can be used as an electrocatalyst for alkaline hydrogen evolution reactions; a cathode and an electrochemical cell comprising the cathode; as well as a preparation method and use thereof.