36results about How to "Improve electrode activity" patented technology

The present invention provides an electrode for generation of hydrogen comprising: a conductive substrate; a catalytic layer formed on the conductive substrate and containing at least one platinum group metal selected from the group consisting of Pt, Ir, Ru, Pd and Rh; and a hydrogen adsorption layer formed on the catalytic layer. The present invention also provides an electrode for generation of hydrogen comprising: a conductive substrate, a catalytic layer formed on the conductive substrate and containing: at least one platinum group metal selected from the group consisting of Pt, Ir, Ru, Pd and Rh and/or at least one oxide of said platinum group metals; and at least one metal selected from the group consisting of lanthanum series metals, valve metals, iron series metals and silver and/or at least one oxide of said metals; and a hydrogen adsorption layer formed on the catalytic layer.

The invention relates to the fuel cell field, aims to provide a direct liquid fuel cell using conductive polymer modified carbon based cobaltous hydroxide composite catalyst. The cell comprises a negative pole using foam nickel as matrix and a positive pole using hydrophobic processed carbon paper or carbon cloth as matrix; The negative pole is made by mixing the conductive polymer modified carbon based cobaltous hydroxide composite catalyst, water, perfluoro sulfonic group resin solution with concentration of 5wt% and anhydrous ethanol, blending into slurry, coating on foam nickel and drying in air naturally. The beneficial effects of the invention is: conductive polymer can increase electrode electrical conductivity, reduce electrode impedance, improve electrode activity, and improve the electricity generation performance of cell; the synthesized conductive polymer modified carbon based cobaltous hydroxide composite catalyst is non-Pt catalyst, has a low cost, is favorable to the popularization of fuel cell technology.

The invention discloses a method for treating poisonous and organic pollutant atrazine through a modified electrode in an electrocatalytic oxidation mode and belongs to the field of electrode electrocatalytic application. A titanium dioxide nanotube array (TiO2-NTs) is prepared, and layers of Ni are electroplated at the bottom of a substrate Ti and the bottom of TiO2NT; titanium dioxide nanotubes are coated with an intermediate layer SnO2-RuO2-Ce, components of deposition liquid are 18g of SnC14.5H2O, 0.1g of RuCl3, 0.7g of Ce(NO3)3.6H2O and 0.1g of sodium dodecyl benzene sulfonate, 2ml of HCl(37%) is dissolved in 100ml of an ethanol solution, and current density is 20mA/cm<2>; electro-depositing is carried out for 30 minutes at normal temperature, then the nanotubes are put into a muffle furnace of 500 DEG C to be calcined for 60 minutes, so that the intermediate layer SnO2-RuO2-Ce is obtained, and the lead dioxide and rare earth Y2O3 modified titanium dioxide nanotube electrode is prepared; the poisonous and organic pollutant atrazine is treated in the electrcatalytic oxidation mode. The self-made Y2O3-PbO2 doped modified high-activity Y2O3-PbO2/SnO2-RuO2-Ce/Ni-TiO2-NTs/Ti modified electrode is adopted as an anode, the electrode is not suitable for inactivation in the electrolytic process, corrosion resistance of the electrode is good, and selectivity is good during degrading.

The invention relates to a nickel-based composite anode material of a solid oxide fuel cell and an application thereof. The composition of the composite anode material can be expressed by Ni1-x-yMgxAlyO1 plus 0.5y, wherein x varies from 0.01 to 0.2 and y ranges from 0.001 to 0.2. The composite anode material is compounded with an electrolyte material to prepare an anode, and the weight percentage of magnesium oxide and aluminium oxide modified nickel-based composite oxide material is 30-70 percent. During practical application, the composite anode is put into use after reduction, the reduced anode contains the electrolyte material, metal micron-nickel and nano particles, magnesium oxide, aluminium oxide and a composite oxide formed by magnesium oxide, aluminium oxide and nickel oxide. The novel composite anode can be used for flat-plate-type, tubular, honeycomb-type and oblate-tube-type solid oxide fuel cells.

The invention discloses a metal boride water-splitting catalyst, a preparation method and an application of the catalyst in electro-catalytic water splitting and belongs to the technical field of preparation of an electrocatalyst. The metal boride water-splitting catalyst is prepared with a solid-phase boriding method, transition metal is coated with a solid boriding agent, and boriding treatmentis performed through temperature programming heating. The boriding agent is prepared from a necessary boriding medium and an unnecessary filling agent. Compared with liquid boriding, a solid boridingmethod has the advantages that the surface clearing difficulty is low after boriding, requirements for equipment are low, and the method is applicable to boriding treatment of various transition metals. The catalyst has very good intrinsic catalysis activity and stability performance under the alkaline condition, and the required potential is 300-400 mV when the current density is 10 mA cm<-2>; the electro-catalytic water splitting oxygen evolution stability can be as long as at least 100 h while the performance is not attenuated, and the catalyst can replace noble metals to promote commercialapplication of electro-catalytic water splitting.

The invention relates to the technical field of electrocatalytic degradation application, in particular to a method for conducting electrocatalytic oxidation treatment on phenol organic wastewater through a novel anode. The method includes the following steps of S1, preparing a titanium dioxide nanotube array; S2, modifying NiO in nanotubes through a pulse depositing method and a high-temperaturecalcination method to prepare a Ti/TiO2NTs-NiO electrode high in conductivity; S3, using the Ti/TiO2NTs-NiO electrode as a working electrode, and preparing a high-performance Ti/TiO2NTs-NiO/PbO2 anodematerial through pulses; S4, conducting electrocatalytic oxidation treatment on the phenol organic wastewater through the prepared Ti/TiO2NTs-NiO/PbO2 anode material. The Ti/TiO2NTs-NiO/PbO2 modifying electrode is used as the anode, electrocatalytic oxidation treatment is conducted on the toxic phenol organic wastewater in an electrolytic cell, the degradation efficiency is higher than that of anordinary lead electrode, the degradation rate of COD of the phenol organic wastewater can reach 92.7%, the average current efficiency in the degradation process is remarkably improved compared with that of the ordinary lead electrode, the average current efficiency reaches 34%, electric energy loss is effectively reduced, and meanwhile degradation efficiency is improved.

The invention relates to a material processing method, in particular to an electrode processing method applied to direct synthesis of hydrogen peroxide through oxygen electroreduction, and belongs to the field of hydrogen peroxide direct synthesis through electrochemistrical oxygen reduction. A processing method for etching a graphite felt electrode through ferrocene-glacial acetic acid solution steam is designed; the glacial acetic acid-ferrocene solution steam is injected under the high-temperature oxygen-free condition to etch the surface of the graphite felt electrode, the original smooth graphite felt microcosmic surface becomes rough and porous through the etching process, and the specific surface area can be simply and effectively increased; and meanwhile, surface changes cannot influence the graphite felt structure, and the mechanical property is kept well. In this way, the aims of improving the electrode activity and being free of influences on stability are achieved. The problem that an existing technology for direct synthesis of hydrogen peroxide through electro-catalysis oxygen reduction is low in electrode catalysis activity is solved.

The invention belongs to an activation method of a carbon fiber electrode material. The invention adopts polypropylene carbon fiber weaved cloth soaked with epoxy resin as a raw material, and comprises the following steps of injecting air in a short time at a low vacuum condition with a temperature 600-700 DEG C, then performing vacuumization and natural cooling; thereby the surface properties of the carbon fiber cloth are improved, and the electrode activity is increased by more than 3 times.

The invention relates to a metal electrode activation method for an oxygen-metal battery. By forcedly oxidizing a substrate, the volume of the substrate is expanded, and the stress is increased to lead the substrate to peel off. According to the metal electrode activation method, oxygen content in an electrolyte is increased by increasing oxygen partial pressure on an electrolyte level, oxygenating microbubbles and through stirring and oxygenating modes; oxygen is diffused and penetrates through a compact oxygen membrane of a metal electrode under the driving of oxygen concentration and fluid pressure of the electrolyte, enters the oxygen membrane and is combined with metal to generate an oxide, the volume of the metal after combined with the oxygen through diffusion is expanded, the hard and brittle oxygen membrane is broken and peeled off due to stress, and the metal substrate is exposed, therefore, the purpose of metal electrode activation before battery discharging is achieved.

The invention relates to the technical field of electronic materials used in electronic components, in particular to an inductive plating-free terminal electrode silver paste. by weight of spherical silver powder25 -35%, flake silver powder 15%- 25%, silver oxide powder 10%- 15%, glass powder and other inorganic materials 2%- 4%, organic carry 20%-25%, and that sum of the weight percentages of each substance is 100%. A silver paste for inductance non-plating terminal electrode produced by the silver paste of the invention has the advantages of high drying intensity, good appearance quality ofthe sealing terminal, compact electrode layer after firing, high terminal adhesion, no jump sheet meeting SMT packaging requirements, low resistivity, small DC resistance RDC, environmental protectionand non-plating..

The invention relates to a catalytic material for the anode of a solid oxide fuel cell, in particular to a magnesium-containing catalytic material for the anode of a solid oxide fuel cell, preparation and application thereof. The magnesium-containing catalytic material comprises the component of NiOxMgyOz, wherein Ni represents nickel, Mg represents magnesium, O represents oxygen, y is larger than 0 and smaller than 0.5, x is larger than 0 and smaller than 2, and z is larger than 0 and smaller than 0.5. Characterized by using the catalytic material for the anode, the invention can reduce the polarization resistance of the cell, increase the activity of the electrodes and improve the output performance of the cell.

The present invention relates to an electrode binder solution composition for a polymer electrolyte fuel cell comprising a mixture of a solvent and a nonsolvent. The electrode binder solution composition can significantly improve electrode activity by maximizing formation of a three-phase interface of catalyst, binder and fuel at the electrode catalytic layer of the polymer electrolyte fuel cell. The present invention relates to a preparation method of an electrode binder solution for a polymer electrolyte fuel cell, the electrode binder solution for a polymer electrolyte fuel cell comprising a sulfonated proton exchange hydrocarbon-based polymer and a mixture of a solvent and a nonsolvent. The present invention also relates to a preparation method of an electrode catalyst slurry comprising the steps of: mixing an electrode binder solution composition for a polymer electrolyte fuel cell with a platinum catalyst and drying the mixture; and heat-treating the dried mixture to maximize interface between the electrode binder and the catalyst.

The invention discloses a liquid anode which is composed of hydrophobic liquid, a hydrophilic immobilization film and a conductive electrode; a bag made of the hydrophilic immobilization film is filled with the hydrophobic liquid, and then the conductive electrode is placed in the bag, and therefore, the liquid anode can be prepared; the hydrophobic liquid is hydrophobic ionic liquid or hydrophobic conductive liquid. Compared with a traditional anode material, the liquid anode is simple in preparation method, large in electrode specific surface area and large in capacitance; physical adsorption, chemical adsorption and electric adsorption are organically coupled, so that the liquid anode is suitable for treating complex anions in water, and the problems of small current density, failure torealize efficient mass transfer, low electrolysis efficiency and large power consumption of a conventional electrode electrolyzing low-concentration wastewater can be solved.

The invention discloses a multilayer film material. The preparation method comprises the steps: adding a titanium source compound and an antimony source compound into a hydrochloric acid solution; stirring and mixing, inserting conductive glass into the mixed solution, carrying out hydrothermal reaction, and calcining at high temperature to obtain an antimony-doped titanium dioxide nano-electrode;then putting the antimony-doped titanium dioxide nano-electrode into a phosphoric acid aqueous solution, and carrying out hydrothermal treatment to obtain an antimony-doped titanium dioxide nano-electrode; and carrying out electro-polymerization deposition by taking the antimony-doped titanium dioxide nano-electrode as a working electrode to obtain the polypyrrole/antimony-doped titanium dioxidemultilayer film electrode. According to the prepared polypyrrole/antimony-doped titanium dioxide multilayer film electrode, antimony ion doping is carried out, the activity of TiO2 under visible lightis improved, polypyrrole nanowires are deposited on the surface of a titanium dioxide film to form p-n heterojunctions, and directional movement of electrons and holes is induced, so that the recombination probability of electron-hole pairs is reduced, and the electrode activity of the material is further improved.

The invention discloses an electrode treated by persulfate and application of the electrode in a zinc-iron flow battery, an electrode material is soaked in an aqueous solution of persulfate for treatment, and compared with an original untreated electrode material, the electrode material has higher electrode activity, the conductivity of the battery can be effectively improved, and the cycle performance and the efficiency of the battery are improved; meanwhile, the charge-discharge capacity and the energy density of the battery are greatly improved.

The invention relates to a preparation method of a high-performance electrode material for high concentration rate operation of circulating water. The method includes the following steps: dispersing and suspending graphite powder in deionized water; adding a multi-walled carbon nanotube; preparing a required solution; dropping a SnCl2 solution and a ReCl2 solution into the mixture; dropping a PtCl4 solution; adding a NaOH solution into the mixture until pH reaches 9; adding ammonia water into the mixture until the pH reaches 10, and cooling the mixture to room temperature for clarification; sucking a supernatant solution out, and cleaning a reaction product until the pH of an eluate is reduced to 7.5; adding deionized water into the reaction product and stirring the mixture; adding a prepared NaBH4 solution into the mixture and cooling the mixture to room temperature for clarification; pumping-filtering the mixture; placing a filter cake into a baking oven for drying; and obtaining thehigh-performance electrode material, and pressing the high-performance electrode material for forming. The high-performance electrode material can be used for treatment of circulating water and can ensure the low-cost high-concentration rate operation of a circulating water system.

The invention belongs to the field of a fuel cell, and particularly relates to a preparation method of a Pt-Ag/porous polyaniline electrode material. Specific to the shortcomings of limited resourcesand high cost of a Pt catalytic material, the invention provides the preparation method of Pt-Ag/porous polyaniline. Porous polyaniline is prepared by adopting a chemical method, and then a Pt-Ag/porous polyaniline nanocomposite is prepared by adopting an electro-deposition method; electrocatalytic oxidation effects of Pt/porous polyaniline composite electrodes modified by different metals of Fe,Mn and Sn on glycerinum are compared synchronously, and it is determined that the Pt-Ag/porous polyaniline material has the best electrocatalytic oxidation effect on glycerinum; then influence of Pt,and Ag deposition sequences and deposition number of turns on electrocatalytic oxidation of glycerinum are further compared; and it is determined that the best electrode performance of the Pt-Ag/porous polyaniline can be achieved by deposition of Pt first and then deposition of At later at the deposition number of turns of 300. Therefore, the composite fuel has the potential application prospect on the aspect of the fuel cell.