A CaTiO.sub.3—TiO.sub.2 composite electrode and method of making is described. The composite electrode comprises a substrate with an average 2-12 μm thick layer of CaTiO.sub.3—TiO.sub.2 composite particles having average diameters of 0.2-2.2 μm. The method of making the composite electrode involves contacting the substrate with an aerosol comprising a solvent, a calcium complex, and a titanium complex. The CaTiO.sub.3—TiO.sub.2 composite electrode is capable of being used in a photoelectrochemical cell for water splitting.

The present disclosure relates to a photoelectrochemical photoelectrode for water splitting, which includes a plate-type photoelectrode including a transparent electrode substrate and a photoanode layer disposed on the transparent electrode substrate, wherein the plate-type photoelectrode exists in a plural number, and the plural plate-type photoelectrodes are disposed in such a manner that the transparent electrode substrate of one photoelectrode may face the photoanode layer of the other photoelectrode, while being spaced apart from each other. In this manner, it is possible to scale-up the photoelectrochemical photoelectrode for water splitting, while providing improved water splitting performance.

Provided is a semiconductor photoelectrode which maintains a light energy conversion efficiency for a long time. In the semiconductor photoelectrode, using a conductive substrate including a III-V group compound semiconductor, a semiconductor thin film including a III-V group compound semiconductor having a photocatalytic function is disposed on the substrate, and an oxygen generation co-catalyst layer having an oxygen generation co-catalytic function for the semiconductor thin film is disposed on the semiconductor thin film. Between the semiconductor thin film and the oxygen generation co-catalyst layer, a semiconductor thin film including a III-V group compound semiconductor having a lattice constant smaller than that of the semiconductor thin film in a plane perpendicular to a crystal growth direction is disposed.

A wastewater to chemical fuel conversion device is provided that includes a housing having a first chamber and a second chamber, where the first chamber includes a bio-photoanode, where the second chamber includes a photocathode, where a backside of the bio-photoanode abuts a first side of a planatized fluorine doped tin oxide (FTO) glass, where a backside of the photocathode abuts a second side of the FTO glass, where a proton exchange membrane separates the first chamber from the second chamber, where the first chamber includes a wastewater input and a reclaimed water output, where the second chamber includes a solar light input and a H.sub.2 gas output, where the solar light input is disposed for solar light illumination of the first chamber and the second chamber.

The present application discloses a photoelectrode and a preparation method therefor, and a Pt-based alloy catalyst and a preparation method therefor. The method for preparing the Pt-based nano-alloy catalyst includes: placing a photoelectrode in an electrolytic cell with at least one light-transmitting surface and including an electrolyte; using a light source to irradiate a surface of the photoelectrode from the light-transmitting surface of the electrolytic cell, where the photoelectrode includes an active metal layer, a passivation layer, a semiconductor light absorption layer, a rear conductive layer, and an insulating protective layer that are sequentially stacked along the light incident direction; based on an electrochemical workstation and light irradiation, using a Pt electrode and a reference electrode to match the photoelectrode to electrochemically treat the surface of the photoelectrode; and cleaning the electrochemically-treated photoelectrode to obtain the Pt-based nano-alloy catalyst and a photoelectrode modified by the Pt-based nano-alloy catalyst.

The present application discloses a photoelectrode and a preparation method therefor, and a Pt-based alloy catalyst and a preparation method therefor. The method for preparing the Pt-based nano-alloy catalyst includes: placing a photoelectrode in an electrolytic cell with at least one light-transmitting surface and including an electrolyte; using a light source to irradiate a surface of the photoelectrode from the light-transmitting surface of the electrolytic cell, where the photoelectrode includes an active metal layer, a passivation layer, a semiconductor light absorption layer, a rear conductive layer, and an insulating protective layer that are sequentially stacked along the light incident direction; based on an electrochemical workstation and light irradiation, using a Pt electrode and a reference electrode to match the photoelectrode to electrochemically treat the surface of the photoelectrode; and cleaning the electrochemically-treated photoelectrode to obtain the Pt-based nano-alloy catalyst and a photoelectrode modified by the Pt-based nano-alloy catalyst.

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.

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.

Disclosed herein are nanostructured electrodes and methods of making and use thereof. The nanostructured precursor electrodes comprising a copper substrate, a nanostructured copper oxide layer disposed on the copper substrate and a nickel layer disposed on the nanostructured copper oxide layer.

The present disclosure relates to a carbon dioxide capture device comprising a first reactor and a second reactor both of which show a (photo)anode containing or connected to oxygen evolution and/or carbon dioxide evolution catalyst(s) and a (photo)cathode containing or connected to an oxygen reduction catalyst, wherein the first reactor comprises an anion exchange membrane placed between the porous (photo)anode and porous (photo)cathode, and the second reactor comprises a proton exchange membrane placed between the porous (photo)anode and porous (photo)cathode. On the porous (photo)cathode side of the first reactor there is a fluid inlet able to carry carbon dioxide, air and water, and on the side of the porous (photo)cathode of the second reactor there is a fluid outlet able to carry carbon dioxide and water.