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Fotosíntesis artificial desacoplada a través de un dispositivo fotoelectroquímico acoplado por catálisis y redox
Wan Lin1,2, Jing Lin1,3, Xiang Zhang1,3
1CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
Journal of the American Chemical Society
|August 7, 2023
Resumen
Los investigadores desarrollaron un nuevo método para la fotosíntesis artificial utilizando el almacenamiento de energía fotoelectroquímica. Este enfoque desacopla temporalmente la evolución del oxígeno y la reducción de CO2 para una producción más segura de combustible solar bajo demanda.
Área de la Ciencia:
- Química
- Ciencias de los materiales
- Energía renovable
Sus antecedentes:
- La fotosíntesis artificial tiene como objetivo producir combustibles directamente de la luz solar.
- La evolución simultánea del oxígeno y las reacciones de reducción de CO2 plantean desafíos en la separación y seguridad de los productos.
Objetivo del estudio:
- Proponer una estrategia para desacoplar temporalmente la fotosíntesis artificial mediante el almacenamiento de energía fotoelectroquímica.
- Para permitir la producción bajo demanda y separada de O2 o combustibles solares.
Principales métodos:
- Se utilizó un marco orgánico covalente (DTCo-COF) con fracciones redox activas.
- Se integró un fotocátodo COF con un fotoánodo OER en un dispositivo fotoelectroquímico.
- Reacciones redox reversibles habilitadas y fotorreducción de CO2 promovida por redox.
Principales resultados:
- Se ha demostrado el almacenamiento efectivo de electrones y protones generados por los grupos -CO.
- Demostró la capacidad de utilizar las cargas almacenadas para la reacción de reducción de CO2 (CDRR).
- Se logra la regeneración de -CO para completar el ciclo, permitiendo la producción separada de O2 o de combustible solar.
Conclusiones:
- La estrategia propuesta permite la fotosíntesis artificial desacoplada temporalmente.
- Este enfoque hace avanzar el desarrollo de tecnologías eficientes de producción de combustible solar.
- Destaca el potencial de los marcos orgánicos covalentes en el almacenamiento y la conversión de energía.
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