183 results about "Diamond electrodes" patented technology

The present invention provides a conductive diamond electrode having: a conductive substrate; a coating layer formed on a surface of the conductive substrate, the coating layer containing one of a metal and an alloy each including at least one of niobium and tantalum; and a conductive diamond layer formed on a surface of the coating layer, and a process for producing the conductive diamond electrode.

The invention is related to the method for production of diamond electrode with improved stability for use in electrochemical reaction. The method concerns to the production of diamond electrodes where the diamond layer is composed of small sized grain, avoiding the delamination problems found in conventional diamond electrodes.

A diamond electrode includes a conductive silicon substrate having a plurality of pores. The diamond electrode also includes a conductive diamond covering the conductive silicon substrate. The inner wall surfaces of the plurality of pores are at an angle of 60° to 85° with respect to a substrate of the conductive silicon substrate.

A diamond electrode and a diamond microelectrode array for biosensors and electroanalytical applications, such as electrochemical impedance spectroscopy (EIS), are disclosed. The electrode comprises a layer of ultra-smooth conductive nanocrystalline diamond (NCD) having a resistivity of >0.05 Ωcm and a surface roughness of <20 nm R_a. Preferably, the diamond layer comprises boron or nitrogen-doped ultrananocrystalline diamond (UNCD) having an average grain size <10 nm and a surface roughness <10 nm R_a. It may be patterned to define a microelectrode array with a plurality of individually addressable electrodes, each having a diameter in the range from 100 nm to 100 μm. The surface of each microelectrode is hydrogen-terminated before bio-functionalization, i.e. modifying with sensing molecules for detection of a specific biological or chemical target and coating with a blocker for reducing non-specific binding. These diamond electrodes exhibited substantial increases in sensitivity, selectivity and signal reproducibility, e.g. for detection of E. coli K12 using EIS.

A conductive diamond electrode including an electrode substrate comprising a material selected from the group consisting of a valve metal and an alloy based on the valve metal, at least a surface of the metal or alloy having been subjected to plasticization processing, or heat treatment in vacuum or inert atmosphere; and a conductive diamond film formed on the plasticization processed surface of the electrode substrate. When the electrode substrate is subjected to plasticization processing and heat treatment, peeling resistance of the conductive diamond film is improved, thereby an electrode life is prolonged.

A diamond electrode having a sufficiently low resistance is disclosed which is realized by increasing the amount of boron added thereto. A method for producing a high-performance, high-durability electrode is also disclosed by which adhesiveness between a diamond coating and a substrate and separation resistance during electrolysis are sufficiently increased. An electrode composed of a substrate and a diamond layer coating the substrate is characterized in that the electrode is composed of a base coated with diamond and the diamond contains boron in such an amount that the boron concentration is not less than 10,000 ppm but not more than 100,000 ppm. The base is preferably made of an insulating material.

A conductive diamond electrode including a conductive substrate comprising a carbonaceous material, a conductive diamond catalyst layer formed on a surface of the conductive substrate, and a carbon fluoride formed on an exposed portion present on the surface of the conductive substrate. The formed carbon fluoride prevents the conductive substrate from contacting with an electrolytic solution, thereby suppressing corrosion of the substrate. A long life of the electrode can be attained.

A diamond electrode having an oxidation resistant diamond film which will not separate from the electrode during electrolysis with highly oxidizing materials. The thickness of the diamond film is 20 pm or more and the diamond film should preferably cover opposite side surfaces of a substrate in such a manner as to also cover end surfaces 2a of the substrate. The surfaces of the substrate are covered with a plurality of diamond layers to form the film using repeated steps of forming separate diamond layers with each diamond layer having a thickness of 10 to 30 pm on one of the surfaces of the substrate and then forming a diamond layer having a thickness of 10 to 30 pm on the other surface of the substrate. Thus, it is possible to form a nonporous surface of diamond layer and prevent deterioration of an electrode caused by the separation of a diamond film.

A method for producing a diamond electrode comprising synthetically produced and electrically conductive (doped) diamond particles, which are embedded into a support layer of electrically non-conductive material. The doped diamond particles are introduced as a single layer between two films that form the support layer, the films then being permanently connected to each other and the diamond particles being exposed on both sides of the support layer.

A bulk boron doped diamond electrode comprising a plurality of grooves disposed in a surface of the bulk boron doped diamond electrode. The bulk boron doped diamond electrode is formed by growing a bulk boron doped diamond electrode using a chemical vapour deposition technique and forming a plurality of grooves in a surface of the bulk boron doped diamond electrode. According to one arrangement, the plurality of grooves are formed by forming a pattern of carbon solvent metal over a surface of the bulk boron doped diamond electrode and heating whereby the carbon solvent metal dissolves underlying diamond to form grooves in the surface of the bulk boron doped electrode. The invention also relates to an electrochemical cell comprising one or more grooved bulk boron doped diamond electrodes. The or each bulk boron doped diamond electrode is oriented within the electrochemical device such that the grooves are aligned in a direction substantially parallel to a direction of electrolyte flow.

The present invention provides an ozone generator comprising an anode and a cathode provided on each side of a fluororesin type cation exchange membrane, the anode being a conductive diamond electrode having conductive diamond on the surface, wherein water is supplied to an anode compartment, DC current is supplied between the anode and the cathode to electrolyze water to evolve ozone from the anode compartment and hydrogen from a cathode compartment, the conductive diamond electrode comprising a substrate having a plurality of convexo-concave and a conductive diamond film coated on the surface of the substrate is applied as the conductive diamond electrode, and a close packed layer of ion exchange resin particles or the fluororesin type cation exchange membrane with notch is closely adhered to the surface of the anode side of the fluororesin type cation exchange membrane.

An electrode comprising an electrically conducting diamond plate wherein the diamond plate comprises at least one elongate aperture and having an aperture edge length per unit working area of the diamond plate of greater than about 4 mm/mm², electrolysis cells comprising such electrodes, methods of treating water using such electrolysis cells and a method of production of ozone are disclosed.

The invention belongs to the field of diamond electrode preparation. A preparation method of the high-specific surface diamond electrode is characterized by comprising the following steps: (1) the metal electrode is cleaned; (2) conductive diamond film is prepared; (3) solid etching material is prepared on the surface of the conductive diamond film; (4) the diamond film surface is corroded through a plasma auxiliary solid contact method; (5) residual solid etching material on the diamond film surface is dissolved by acid solution, to obtain the high-specific surface diamond electrode. The preparation method has the advantages of large-area preparation, easy operation, short time in preparation, etc.

The invention relates to a diamond electrode with synthetically produced, electrically conductive (doped) diamonds. The surface has diamond particles (5) embedded in a metal or metal alloy layer so as to produce a conductive connection to the metal or metal alloy.

A diamond based electrochemical band sensor comprising: a diamond body; and a plurality of boron doped diamond band electrodes disposed within the diamond body, wherein at least a portion of each of the plurality of boron doped diamond band electrodes is doped with boron to a level suitable to achieve metallic conduction, the boron doped diamond electrodes being spaced apart by non-conductive intrinsic layers of diamond, wherein the diamond body comprises a front sensing surface with the plurality of boron doped diamond band electrodes being exposed at said sensing surface and extending in an elongate manner across said surface, and wherein each boron doped diamond electrode has a length/width ratio of at least 10 at the front sensing surface.

The invention provides a boron-nitrogen co-doped diamond electrode comprising a matrix and a boron-nitrogen co-doped diamond layer arranged on the surface of the matrix. The boron-nitrogen co-doped diamond layer comprises a flat structure layer arranged on the surface of the matrix and an array protrusion structure arranged on the surface of the flat structure layer. According to the boron-nitrogen co-doped diamond electrode, the surface layer of the boron-nitrogen co-doped diamond layer is arranged to be the array protrusion structure, so that the specific surface area and active sites of theboron-nitrogen co-doped diamond layer are increased, and therefore the capacity of the electrode to conduct carbon dioxide electro-catalytic reduction is improved; and finally, the accumulation amount of the carbon dioxide in the atmosphere is reduced, and resource utilization of waste is achieved, and the practicability is high. The invention further provides a preparation method of the boron-nitrogen co-doped diamond electrode. According to the preparation method of the boron-nitrogen co-doped diamond electrode, the technology is simple, the cost is low, the boron-nitrogen co-doped diamondelectrode having an excellent carbon dioxide electro-catalytic reduction performance can be prepared, and the service life of the boron-nitrogen co-doped diamond electrode in severe environments is long.

A biological sensor for electrochemical and/or electrical measurement, including at least:

• • a measurement electrode, able to make electrochemical and/or electrical measurements, and including a part of a doped diamond layer of a substrate comprising a stack including a dielectric layer placed between the doped diamond layer and a semiconductor material layer;
  • an electronic circuit for amplifying and/or processing at least one electrical signal intended to be issued by the measurement electrode, electrically connected to the measurement electrode and made in a portion of the semiconductor material layer.

The present invention provides a conductive diamond electrode structure for use in electrolytic synthesis of a fluorine-containing material with a fluoride ion-containing molten salt electrolytic bath, which comprises: a conductive electrode feeder; and a conductive diamond catalyst carrier comprising a conductive substrate and a conductive diamond film carried on a surface thereof, wherein the conductive diamond catalyst carrier is detachably attached to the conductive electrode feeder at a portion to be immersed in the electrolytic bath. Also disclosed is an electrolytic synthesis of a fluorine-containing material using the conductive diamond electrode structure.