7 results about "Electrochemical doping" patented technology

This invention discloses an anode material for hydrogen production via water electrolysis, its preparation method, and its application, belonging to the field of water electrolysis hydrogen production technology. The preparation method includes the following steps: using a three-electrode system, with NiFe layered double hydroxide as the working electrode, Pt as the counter electrode, Hg / HgO as the reference electrode, and ammonium molybdate solution as the electrolyte, applying a constant negative potential to the working electrode, and performing electrochemical Mo doping to obtain the anode material for water electrolysis hydrogen production. The catalytic activity of the anode material for water electrolysis hydrogen production of this invention is significantly improved, while the Tafel slope is reduced, making it suitable for industrial-grade high current density water electrolysis.

The application discloses a preparation method of a polymer modified spherical silica aerogel material. First, 3-(acryloyloxy)propyl-2-thiophene acrylate is synthesized through esterification and grafting reaction, and then is subjected to free radical polymerization with vinylpyridine under the action of an initiator and a chain transfer agent, and is subjected to proton acid doping and spray drying to obtain a conductive polymer. After hydrolysis of tetraethyl orthosilicate, the conductive polymer, phosphonated chitosan microspheres and a bridging agent are mixed, and pH and viscosity are adjusted to obtain a composite sol; after drop ball emulsification, gelation, ultrasonic template removal, gradient replacement and subcritical drying, the composite sol is subjected to pulse electrochemical doping and plasma annealing treatment. The prepared aerogel polymer has low charge transfer resistance and excellent conductivity, and has application potential in electrochemical energy storage devices such as supercapacitors.

This invention discloses a Schottky diode based on cubic boron nitride (c-BN) single crystal material. The fabrication method includes the following steps: A cleaned bulk c-BN single crystal is covered with tape, exposing only the area to be plated with electrodes. An Au metal electrode is deposited on one side of the bulk c-BN single crystal, and then the tape is removed. In a glove box, the oxide layer on the surface of a lithium sheet is scraped off, and the sheet is placed on the Ag-plated side of a PCB board. The unplated side of the bulk c-BN single crystal is then tightly attached to the lithium sheet. Fine metal wires are used to connect and fix the Ag electrode on the PCB board to the Au electrode on the bulk c-BN single crystal. After electrochemical doping, an Au metal electrode is deposited on the lithium-doped side of the c-BN crystal. In this invention, lithium atoms are introduced onto the c-BN surface, and their energy levels are located at shallow levels, thereby effectively improving the interfacial contact quality between the metal and c-BN. This improvement further reduces the contact barrier ΦB between the c-BN single crystal and the metal by reducing the interfacial state density.

This invention discloses a titanium-based catalytic electrode and its preparation method, comprising steps such as substrate pretreatment, hydrothermal preparation, and CV doping. Through the above method, the titanium-based catalytic electrode and its preparation method of this invention, using a titanium mesh as a substrate, constructs a titanium-based metal electrode through a multi-step sequential preparation process including substrate etching, hydrothermal treatment, and electrochemical doping. This not only effectively enhances the local pH of the cathode and promotes the rapid precipitation of Mg(OH)2, but also inhibits the dense adhesion of calcium and magnesium scale, extending the electrode's self-cleaning cycle. It is suitable for treating high-hardness wastewater under alkaline conditions, providing important technical support for water pollution control, recycling, and the implementation of sustainable development strategies, possessing significant scientific value and promising application prospects.

The invention discloses a toner containing an insoluble and infusible conductive polymer. The toner can solve the problem that an existing toner is not resistant to thermal offset. According to the technical scheme, the method comprises the following steps: (1) firstly, performing electrochemical doping modification on a conductive polymer to improve the conductivity; (2) crushing a conductive polymer, and performing melt kneading on the crushed conductive polymer and low-melting-point and high-acid-value resin to obtain conductive polymer master batches which are easier to disperse; and (3) preparing the toner composition containing the insoluble and infusible conductive polymer by taking the conductive polymer master batch as an internal additive. The toner obtained by the invention has good thermal migration resistance, narrower charged distribution and good hue, the used materials are wide in source, the treatment method is simple and efficient, and the toner is suitable for large-scale production.

The invention discloses a preparation method of a polymer modified spherical silicon oxide aerogel material. The preparation method comprises the following steps: firstly synthesizing 3-(acryloyloxy) propyl-2-thiophene acrylate through esterification and grafting reaction, then carrying out free radical polymerization on 3-(acryloyloxy) propyl-2-thiophene acrylate and vinylpyridine under the action of an initiator and a chain transfer agent, and carrying out protonic acid doping and spray drying to obtain the conductive polymer. Hydrolyzing tetraethoxysilane, mixing the hydrolyzed tetraethoxysilane with a conductive polymer, phosphorylated chitosan microspheres and a bridging agent, and adjusting pH and viscosity to obtain composite sol; and after ball-dropping emulsification, gelation, ultrasonic template removal, gradient replacement and subcritical drying, pulse electrochemical doping and plasma annealing treatment are performed. The prepared aerogel polymer is low in charge transfer resistance and excellent in conductivity, and has application potential in electrochemical energy storage devices such as supercapacitors.

The invention discloses a method for protecting a metal photoelectric cathode by using photo-assisted electrochemical sodium-doped enhanced TiO2. According to the method, the characteristic that TiO2 can generate a large number of high-energy photo-induced electrons and holes after being excited by light so that the reaction activity of TiO2 is greatly enhanced is utilized, illumination is assisted when TiO2 is subjected to electrochemical treatment, so that sodium ions are efficiently embedded into TiO2, a good doping effect is achieved, and the photoelectric cathode protection capability of TiO2 on metal is greatly enhanced. According to the photo-assisted electrochemical doping technology, the doping content can be adjusted by changing the illumination intensity, the negative voltage and the electrolyte concentration, so that the photoelectric property and the photoelectric cathode protection property of TiO2 are regulated and controlled. Compared with the traditional methods such as high-temperature roasting, plasma injection or hydrothermal method, the doping method not only can improve the doping efficiency, but also has the advantages of being simpler to operate, more accurate and controllable, short in time consumption and low in cost, is suitable for TiO2 materials in various forms, and is also easy to implement on a large scale.