摘要:
The present invention provides an electrochemical electrode wherein transition metal (nickel) nanoparticles are used to form an active layer having a large surface area without using a conductive support while maintaining dispersibility and stability, and a method for producing the same. The present invention provides an electrochemical electrode having a conductive substrate and an active layer formed on the conductive substrate, wherein (1) the active layer has a nickel-containing nanostructured material having a dendritic structure formed by agglomerating a plurality of primary particles, and (2) each primary particle has a core and a shell surrounding the core wherein the core is formed of a nickel nanocrystal and the shell is formed of a nickel oxide film; and the present invention also provides a method for producing such an electrochemical electrode comprising: Step 1 of obtaining nickel nanocrystal particles, Step 2 of obtaining primary particles by forming a nickel oxide film on the surface of each nickel nanocrystal particle, and Step 3 of forming a dendritic structure by agglomerating a plurality of the primary particles by depositing the primary particles substantially perpendicular to a conductive substrate.
摘要:
An object of the present invention is to provide a photovoltaic cell that demonstrates a superior photoelectric conversion function. The present invention relates to a photovoltaic cell comprising a semiconductor electrode, an electrolyte and a counter electrode, wherein (1) the semiconductor electrode contains an oxide semiconductor layer having photocatalytic activity, (2) the oxide semiconductor layer contains secondary particles in which primary particles comprising a metal oxide are aggregated, (3) the average particle diameter of the primary particles is from 1 nm to 50 nm, and the average particle diameter of the secondary particles is from 100 nm to 10 μm, and (4) the photovoltaic cell generates electromotive force by radiating light of a wavelength substantially equal to the average particle diameter of the secondary particles onto the semiconductor electrode.
摘要:
An object of the present invention is to provide an oxygen reduction electrode having excellent oxygen reduction properties (oxygen reduction catalyst abilities). The present invention encompasses: (1) A method for manufacturing a nanostructured manganese oxide having a dendritic structure formed from an agglomeration of primary particles, wherein the method comprises the steps of: removing components from a target plate that comprises one or more kinds of manganese oxides by irradiating the target plate with laser light in an atmosphere comprising a mixed gas of inert gas and oxygen gas, the content of the oxygen gas in the mixed gas being no less than 0.05% but no more than 0.5% as measured by mass flow rate; and depositing the removed components on a substrate that is opposed to the target plate substantially in parallel to obtain the nanostructured manganese oxide, and (2) an oxygen reduction electrode comprising a nanostructured transition metal oxide having a dendritic structure formed from an agglomeration of primary particles.
摘要:
Methods of effectively utilizing yeast-containing waste products generated after yeast use can be applied to absorbing agents, drying agents, soil conditioners, catalysts, and other common applications in the same manner as to charcoal-based materials of other materials by carbonizing the waste product, but a new search was needed in order to broaden the industrial utilization of these products. By supporting a particulate or powdered charcoal-based material obtained by carbonizing a yeast-containing material on an electrically conductive gas-permeable base, an electrode can be obtained that is capable of the electrochemical reduction of oxygen. The present charcoal-based material can provide new applications that have not been hitherto proposed, in the sense that oxygen can be electrochemically reduced smoothly and at a small overvoltage (resistance), and a large electromotive force can be obtained, by placing the charcoal-based material at the intersection of the ion path and the oxygen path.
摘要:
A substrate placed on a movable table movable in the X-direction and a spreading nozzle swingable in the Y-direction are relatively moved such that an extended line of the center axis of the spreading nozzle draws a zigzag trace on the substrate. During this relative movement, spacers are spread from the spreading nozzle while the substrate is sequentially discharged by a discharging bar in the moving direction of the substrate by a discharging bar. When the spreading nozzle passes each of folded portions where the trace is folded, the spread amount of the spacers from the spreading nozzle is reduced.
摘要:
A method of manufacturing a titanium-based material includes: rolling a titanium base material via rolling oil that includes carbon to form a rolling-altered layer that includes titanium carbide on a surface of the base material; and depositing a carbon film on the surface on which the rolling-altered layer has been formed.
摘要:
A device for reducing carbon dioxide includes a cathode chamber including a cathode electrolyte solution and a cathode electrode, an anode chamber including an anode electrolyte solution and an anode electrode, and a solid electrolyte membrane. The anode electrode includes a nitride semiconductor region on which a metal layer is formed. The metal layer includes at least one of nickel and titanium. A method for reducing carbon dioxide by using a device for reducing carbon dioxide includes steps of providing carbon dioxide into the cathode solution, and irradiating at least part of the nitride semiconductor region and the metal layer with a light having a wavelength of 250 nanometers to 400 nanometers, thereby reducing the carbon dioxide contained in the cathode electrolyte solution.
摘要:
An oxygen electrode used in the fuel cell and includes a plurality of carbon particles, a carbon thin-film, and surface nanostructure. The carbon particles are bonded to one another with the carbon thin-film, and the surface nanostructure is formed on the surface of the carbon thin-film. The surface nanostructure comprises catalyst nanoparticles made of platinum (Pt) and carbon nanoparticles. According to this combination of these elements, the catalyst nanoparticles are confined within three-dimensional structure to be formed by the carbon nanoparticles and are immobilized without losing space which allows any reactant to be accessed to the surface of the catalyst nanoparticles.
摘要:
A bipolar plate for a fuel cell comprises a substrate formed of stainless steel; an oriented amorphous carbon film formed at least on a surface of the substrate facing an electrode, and containing C as a main component, 3 to 20 at. % of N, and more than 0 at. % and not more than 20 at. % of H, and when the total amount of the C is taken as 100 at. %, the amount of C having an sp2 hybrid orbital (Csp2) being not less than 70 at. % and less than 100 at. %, and (002) planes of graphite being oriented along a thickness direction; a mixed layer generated in an interface between the substrate and the oriented amorphous carbon film and containing at least one kind of constituent atoms of each of the substrate and the oriented amorphous carbon film; and a plurality of projections protruding from the mixed layer into the oriented amorphous carbon film and having a mean length of 10 to 150 nm.
摘要:
The oriented amorphous carbon film contains C as a main component, 3 to 20 at. % of N, and more than 0 at. % and not more than 20 at. % of H, and when the total amount of the C is taken as 100 at. %, the amount of C having an sp2 hybrid orbital (Csp2) being not less than 70 at. % and less than 100 at. %, and (002) planes of graphite being oriented along a thickness direction. This film has a novel structure and exhibits a high electric conductivity. This film can be formed by DC plasma CVD method in which an electric discharge is generated by applying a voltage of not less than 1500 V to reaction gas including at least one kind of compound gas selected from gas of a carbocyclic compound containing Csp2 and gas of an N-containing heterocyclic compound containing Csp2, and nitrogen and/or silicon, and nitrogen gas.