A radiation-assisted (typically solar-assisted)electrolyzer cell and panel for high-efficiency hydrogen production comprises a photoelectrode and electrode pair, with said photoelectrode comprising either a photoanode electrically coupled to a cathode shared with an anode, or a photocathode electrically coupled to an anode shared with a cathode; electrolyte; gas separators; all within a container divided into two chambers by said shared cathode or shared anode, and at least a portion of which is transparent to the electromagnetic radiation required by said photoanode (or photocathode) to apply photovoltage to a shared cathode (or anode) that increases the electrolysis current and hydrogen production.
C25B 11/091 - Électrodes comportant des électro-catalyseurs sur un substrat ou un support caractérisées par le matériau électro-catalytique formé d’au moins un élément catalytique et d’au moins un composé catalytiqueÉlectrodes comportant des électro-catalyseurs sur un substrat ou un support caractérisées par le matériau électro-catalytique formé de plusieurs éléments catalytiques ou composés catalytiques
C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
C25B 11/00 - ÉlectrodesLeur fabrication non prévue ailleurs
H01M 14/00 - Générateurs électrochimiques de courant ou de tension non prévus dans les groupes Leur fabrication
C25B 9/70 - Assemblages comprenant plusieurs cellules
A radiation-assisted (typically solar-assisted) electrolyzer cell and panel for high-efficiency hydrogen production comprises a photoelectrode and electrode pair, with said photoelectrode comprising either a photoanode electrically coupled to a cathode shared with an anode, or a photocathode electrically coupled to an anode shared with a cathode; electrolyte; gas separators; all within a container divided into two chambers by said shared cathode or shared anode, and at least a portion of which is transparent to the electromagnetic radiation required by said photoanode (or photocathode) to apply photovoltage to a shared cathode (or anode) that increases the electrolysis current and hydrogen production.
C25B 11/091 - Électrodes comportant des électro-catalyseurs sur un substrat ou un support caractérisées par le matériau électro-catalytique formé d’au moins un élément catalytique et d’au moins un composé catalytiqueÉlectrodes comportant des électro-catalyseurs sur un substrat ou un support caractérisées par le matériau électro-catalytique formé de plusieurs éléments catalytiques ou composés catalytiques
C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
C25B 11/00 - ÉlectrodesLeur fabrication non prévue ailleurs
H01M 14/00 - Générateurs électrochimiques de courant ou de tension non prévus dans les groupes Leur fabrication
C25B 9/70 - Assemblages comprenant plusieurs cellules
A radiation-assisted (typically solar-assisted) electrolyzer cell and panel for high-efficiency hydrogen production comprises a photoelectrode (1) and electrode pair (2, 3), with said photoelectrode (1) comprising either a photoanode electrically coupled to a cathode (2) shared with an anode (3), or a photocathode electrically coupled to an anode shared with a cathode; electrolyte; gas separators; all within a container (9) divided into two chambers (7 A, 7b) by said shared cathode (2) or shared anode, and at least a portion of which (10) is transparent to the electromagnetic radiation required by said photoanode (1) (or photocathode) to apply photovoltage to a shared cathode (2) (or anode) that increases the electrolysis current and hydrogen production.
C25B 1/00 - Production électrolytique de composés inorganiques ou de non-métaux
C25B 1/06 - Production électrolytique de composés inorganiques ou de non-métaux d'hydrogène ou d'oxygène par électrolyse de l'eau dans des cellules à électrodes plates ou planes
C25B 9/08 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure avec des diaphragmes
C25B 11/03 - ÉlectrodesLeur fabrication non prévue ailleurs caractérisées par la configuration ou la forme perforées ou foraminées
A photoelectrochemical secondary cell comprising a photocatalytic anode, or photoanode; an anode; a cathode comprising a metal hydride; electrolyte; separator; and case at least a portion of which is transparent to the electromagnetic radiation required by said photoanode to charge said photoelectrochemical secondary cell.
H01L 31/00 - Dispositifs à semi-conducteurs sensibles aux rayons infrarouges, à la lumière, au rayonnement électromagnétique d'ondes plus courtes, ou au rayonnement corpusculaire, et spécialement adaptés, soit comme convertisseurs de l'énergie dudit rayonnement e; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives; Leurs détails
H01M 14/00 - Générateurs électrochimiques de courant ou de tension non prévus dans les groupes Leur fabrication
Titania having high visible light photocatalytic activity is prepared by (a) mixing titania with carbon powder; (b) heating the titania/carbon powder mixture to at least about 1000° C. in an inert or weakly reactive atmosphere; and (c) thereafter heating the resultant powder mixture to a temperature in the range of about 350 to about 1000° C. in an oxidizing atmosphere. The resultant titania may be used for detoxifying or disinfecting liquids for gases, for generating hydrogen from aqueous media and in sunscreens and sunglasses.
Titania having high visible light photocatalytic activity is prepared by (a) mixing titania with carbon powder; (b) heating the titania/carbon powder mixture to at least about 1000°C in an inert or weakly reactive atmosphere; and (c) thereafter heating the resultant powder mixture to a temperature in the range of about 350 to about 1000°C in an oxidizing atmosphere. The resultant titania may be used for detoxifying or disinfecting liquids for gases, for generating hydrogen from aqueous media and in sunscreens and sunglasses, and as a fade resistant pigment.
Titania is a semiconductor and photocatalyst that is also chemically inert. With its bandgap of 3.2 and greater, to activate the photocatalytic property of titania requires light of about 390 nm wavelength, which is in the ultra-violet, where sunlight is very low in intensity. A method and devices are disclosed wherein stress is induced and managed in a thin film of titania in order to shift and lower the bandgap energy into the longer wavelengths that are more abundant in sunlight. Applications of this stress-induced bandgap- shifted titania photocatalytic surface include photoelectrolysis for production of hydrogen gas from water, photovoltaics for production of electricity, and photocatalysis for detoxification and disinfection.
Titania is a semiconductor and photocatalyst that is also chemically inert. With its bandgap of 3.2 and greater, to activate the photocatalytic property of titania requires light of about 390 nm wavelength, which is in the ultra-violet, where sunlight is very low in intensity. A method and devices are disclosed wherein stress is induced and managed in a thin film of titania in order to shift and lower the bandgap energy into the longer wavelengths that are more abundant in sunlight. Applications of this stress-induced bandgap-shifted titania photocatalytic surface include photoelectrolysis for production of hydrogen gas from water, photovoltaics for production of electricity, and photocatalysis for detoxification and disinfection.
Titania is a semiconductor and photocatalyst that is also chemically inert. With its bandgap of 3.0, to activate the photocatalytic property of titania requires light of about 390 nm wavelength, which is in the ultra-violet (UV), where sunlight is very low in intensity. A method and devices are disclosed wherein stress is induced and managed in a thin film of titania in order to shift and lower the bandgap energy into the longer wavelengths that are more abundant in sunlight. Applications of this stress-induced bandgap-shifted titania photocatalytic surface include photoelectrolysis for production of hydrogen gas from water, photovoltaics for production of electricity, and photocatalysis for detoxification and disinfection.
H01L 31/042 - Modules PV ou matrices de cellules PV individuelles
H02N 6/00 - Générateurs dans lesquels le rayonnement lumineux est directement converti en énergie électrique (cellules solaires ou ensembles de cellules solaires H01L 25/00, H01L 31/00)
