Monolithisches Katalysatorsystem für die Photolyse von Wasser

Monolithic catalyst system for the cleavage of water into hydrogen and oxygen with aid of light, has first and second photoactive materials associated together with auxiliary materials and auxiliary catalysts when irradiated with the light

Abstract

Ein monolithisches Katalysatorsystem (1) für die Spaltung von Wasser in Wasserstoff und Sauerstoff mit Hilfe von Licht umfasst ein erstes photoaktives Material (50), das allein oder zusammen mit einem weiteren Material und/oder einem Hilfskatalysator bei Bestrahlung mit Licht mit einer Wellenlänge ≧ 420 nm Sauerstoff und Protonen aus Wasser erzeugen kann, und ein zweites photoaktives Material (60), das allein oder zusammen mit einem weiteren Material und/oder einem Hilfkatalysator (92) bei Bestrahlung mit Licht mit einer Wellenlänge ≧ 420 nm Protonen in Wasser zu Wasserstoff reduzieren kann, wobei das erste photoaktive Material (50) und das zweite photoaktive Material (60) über ein oder mehrere Elektronen-leitende Materialien (30, 20, 40, 60a) in elektrischem Kontakt, insbesondere in direktem elektrischem Kontakt, stehen. Ein Verfahren zur Herstellung von Wasserstoff und Sauerstoff unter Verwendung des Katalysatorsystems wird ebenfalls beschrieben.
The monolithic catalyst system for the cleavage of water into hydrogen and oxygen with the aid of light, comprises a first photoactive material (50) associated together with auxiliary materials and auxiliary catalysts (92) when irradiated with the light having a wavelength of >= 450 nm of generating oxygen and protons from water, a second photoactive material (60) associated together the auxiliary materials and the auxiliary catalysts when irradiated with the light having a wavelength of >= 450 nm of reducing protons in water to hydrogen, and a substrate (10). The monolithic catalyst system for the cleavage of water into hydrogen and oxygen with the aid of light, comprises a first photoactive material (50) associated together with auxiliary materials and auxiliary catalysts (92) when irradiated with the light having a wavelength of >= 450 nm of generating oxygen and protons from water, a second photoactive material (60) associated together the auxiliary materials and the auxiliary catalysts when irradiated with the light having a wavelength of >= 450 nm of reducing protons in water to hydrogen, and a substrate (10). The first and second photoactive materials are in direct electrical contact via electron-conducting materials (30, 20, 40). The auxiliary materials and the auxiliary catalysts are associated with the oxygen-generating material and/or the hydrogen-generating material. One of the electron-conducting materials comprises a metal or metal alloy or an oxidic electron-conducting material. The first photoactive material is an optionally doped oxide- and/or sulfide-containing material e.g. ruthenium disulfide, complexes or clusters containing a noble metal or a transition metal, and photoactive polymeric materials. The second photoactive material is a metal-containing complex e.g. a noble metal-containing complex such as ruthenium complexes, an organic compounds having an extended pi system, an oxide- and oxynitride-containing material, a phosphide-, arsenide-, antimonide-, sulfide- and selenide-containing material and a photosemiconducting polymer. The first photoactive material and/or the second photoactive material are bound by a functional group to the electron-conducting materials. The monolithic catalyst system has a plane multilayer structure, where one side of the structure comprises the first photoactive material and the other side of the structure comprises the second photoactive material or one side of the structure comprises the first photoactive material and the second photoactive material. An independent claim is included for a method of generating oxygen and hydrogen from water with the aid of light and a catalyst system.

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Cited By (1)

    Publication numberPublication dateAssigneeTitle
    CN-103097284-AMay 08, 2013特温特大学Photocatalytic water splitting