摘要:
Nanonet-based hematite hetero-nanostructures (100) for solar energy conversions and methods of fabricating same are disclosed. In an embodiment, a hetero-nanostructure (100) includes a plurality of connected and spaced-apart nanobeams (110) linked together at an about 90° angle, the plurality of nanobeams (110) including a conductive silicide core having an n-type photo-active hematite shell. In an embodiment, a device (1100) for splitting water to generate hydrogen and oxygen includes a first compartment (1120) having a two-dimensional hetero-nanostructure (1125), the hetero-nanostructure having a plurality of connected and spaced-apart nanobeams, each nanobeam substantially perpendicular to another nanobeam, the plurality of nanobeams including an n-type photoactive hematite shell having a conductive core; and a second compartment (1110) having a p-type material (1115), wherein the first compartment (1120) and the second compartment (1110) are separated by a semi-permeable membrane.
摘要:
The invention is directed to a system for hydrogen production from water, known as a photoelectrochemical system. The system integrates a semiconductor material and a water electrolyzing material inside a monolithic design, to produce hydrogen directly from water. Natural or synthetic light is used as the main or sole source of energy. The water electrolyzing material is melanins, melanin precursors or melanin derivatives, melanin variants, melanin analogues, natural or synthetic, pure or mixed with organic or inorganic compounds, metals, ions, drugs. The system or light absorbing compound generates enough energy to start, lead and complete the photoelectrolysis reaction. The system can generate hydrogen, oxygen and high energy electrons, and can synthesize water from the union of hydrogen and oxygen, thereby generating electricity. The system can also be coupled to other processes, generating a multiplication effect, and can be used for the reduction of carbon dioxide, nitrates, sulphates and the like.
摘要:
This disclosure provides systems, methods, and apparatus related to a nanowire mesh solar fuels generator. In one aspect, a nanowire mesh solar fuels generator includes (1) a photoanode configured to perform water oxidation and (2) a photocathode configured to perform water reduction. The photocathode is in electrical contact with the photoanode. The photoanode may include a high surface area network of photoanode nanowires. The photocathode may include a high surface area network of photocathode nanowires. In some embodiments, the nanowire mesh solar fuels generator may include an ion conductive polymer infiltrating the photoanode and the photocathode in the region where the photocathode is in electrical contact with the photoanode.
摘要:
A hydrogen generation device (100) of the present invention includes: a transparent substrate (1); a photocatalytic electrode (4) formed of a transparent conductive layer (2) and a photocatalytic layer (3) disposed on the transparent substrate (1); a counter electrode (8) connected electrically to the transparent conductive layer (2); a water-containing electrolyte solution layer provided between the photocatalytic electrode (3) and the counter electrode (8); a separator (6) that separates the electrolyte solution layer into a first electrolyte solution layer (5) in contact with the photocatalytic electrode (4) and a second electrolyte solution layer (7) in contact with the counter electrode (8); a first gas outlet (14) for discharging a gas generated in the first electrolyte solution layer (5); and a second gas outlet (15) for discharging a gas generated in the second electrolyte solution layer (7). The photocatalytic electrode (4) and the counter electrode (8) are arranged so that a surface of the photocatalytic layer (3) and a surface of the counter electrode (8) face each other. The separator (6) allows an electrolyte in the electrolyte solution layer to pass therethrough and prevents hydrogen gas and oxygen gas in the electrolyte solution layer from passing therethrough.
摘要:
A method for generating hydrogen is disclosed. The method includes substantially submersing nanowires having metallic nanoparticles into water, exposing the water submerged nanowires to light, and collecting hydrogen gas produced by photolysis from the exposure to light.
摘要:
Using electric power obtained by marine wind force and a tide, sea water is electrolyzed to produce fresh water, sodium, magnesium, calcium, potassium, caustic soda, chlorine, hydrochloric acid, sulfuric acid, hydrogen, oxygen or the like, at the same time, unloaded malts, saw dust and the like are fermented to brew ethanol, carbon dioxide generated here is used for photosynthesis to culture vegetables and oxygen generated here is supplied to a fish preserve and an under reef where fish live to culture fishes and also returned to sea water dropped in the concentration of oxygen to suppress the generation of a red tide.
摘要:
A hydrogen generating device (100) includes: a housing (1) that is capable of holding a liquid therein, and that is at least partially transmissive to light; an electrolyte that is held in the housing (1) and that contains water; a photoelectrode (2) that is arranged in the housing (1), that has a first surface in contact with the electrolyte, and that generates gas through decomposition of the water by being irradiated with light transmitted through the housing (1); and a conductor (3) that is arranged in a region on the second surface side opposite to the first surface side with respect to the photoelectrode (2) inside the housing (1), that has a surface in contact with the electrolyte, and that is connected electrically with the photoelectrode (2). The conductor (3) has a groove portion (3a) that is provided on the surface in contact with the electrolyte, and that extends along the flow direction of the generated gas.
摘要:
The invention relates to a method for the photoelectrochemical production of hydrogen and oxygen and for the simultaneously or separately conducted photoelectrical/photovoltaic production of electricity, characterized in that water is brought into contact with silicides, while applying light at the same time, or the contact with water can be foregone if electricity is produced exclusively. The invention enables the production of hydrogen and oxygen in a simple way directly from water, wherein the use of UV light and cost-intensive catalysts can be foregone.
摘要:
A water-splitting apparatus and method generating hydrogen and oxygen at separate electrodes have a structure enabling a photo catalytic reaction to be efficiently performed. The apparatus includes a photolysis element having an N-type water-splitting electrode surface and a P-type water-splitting electrode surface at the opposite side surface to the N-type water-splitting electrode surface, a hydrogen generating cell holding the N-type water-splitting electrode surface and collecting the hydrogen generated at that water-splitting electrode surface, and an oxygen generating cell holding the P-type water-splitting electrode surface, collecting the oxygen generated at that water-splitting electrode surface, and adjoining the hydrogen generating cell across the photolysis element. The photolysis element has through holes enabling circulation of water between the hydrogen and oxygen generating cells. The through holes are arranged so that light irradiated on one of the N-type and P-type water-splitting electrode surfaces does not pass through to the opposite side water-splitting electrode surface.
摘要:
A monolithic catalyst system for the cleavage of water into hydrogen and oxygen comprises a first photoactive material capable by itself or together with an auxiliary material and/or an auxiliary catalyst when irradiated with light having a wavelength ≧420 nm of generating oxygen and protons from water, and a second photoactive material capable by itself or together with an auxiliary material and/or an auxiliary catalyst when irradiated with light having a wavelength ≧420 nm of reducing protons in water to hydrogen. The first and second photoactive materials are in electrical contact via an electron-conducting material.