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A dye sensitized photosynthesis cell for stable water oxidation mediated by photo-generated bromine.
Fei, Ling; Guo, Xiao; Liang, Dan; Lei, Lei; Wang, Degao.
Afiliación
  • Fei L; Engineering Laboratory of Advanced Energy Materials, Chinese Academy of Sciences Ningbo Institute of Materials Technology & Engineering, Ningbo, 315201, P. R. China. wangdegao@nimte.ac.cn.
  • Guo X; University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
  • Liang D; Engineering Laboratory of Advanced Energy Materials, Chinese Academy of Sciences Ningbo Institute of Materials Technology & Engineering, Ningbo, 315201, P. R. China. wangdegao@nimte.ac.cn.
  • Lei L; University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
  • Wang D; Research Center for Advanced Interdisciplinary Science of Ningbo Materials Institute, Ningbo, 315201, P. R. China.
Chem Commun (Camb) ; 60(10): 1297-1300, 2024 Jan 30.
Article en En | MEDLINE | ID: mdl-38197123
ABSTRACT
The critical step of a dye-sensitized photoelectrochemical cell (DSPEC) is water oxidation. The photoanodes suffer rapid surface carrier recombination due to slow water oxidation kinetics and this results in low solar conversion efficiency and poor stability. Here, we design a novel sensitization-oxidation photo-anode, where the [Ru(4,4'-PO3H2-bpy)(bpy)2]2+ (RuP2+, bpy = 2,2'-bipyridine) chromophore and [Ru(bda)(pic)2] (pic = picoline, bda = 2,2'-bipyridine-6,6'-dicarboxylate) water oxidation catalyst (WOC) are immobilized separately on the surface of a mesoporous semiconductor thin film. The electrode creates a mobile and strong Br3- oxidant generated by the dye-sensitized electrode, which initiates water oxidation at a remote catalytic site. Under 100 mW cm-2 illumination in pH 4.65 in 0.1 M acetate buffer solution, the photoanode could perform a stable photoelectrochemical water oxidation for 6 hours with a photocurrent density of around 0.25 mA cm-2. This dual electrode could open a new door by utilizing an electron transfer mediator to design highly stable photoelectrochemical cells.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chem Commun (Camb) Asunto de la revista: QUIMICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chem Commun (Camb) Asunto de la revista: QUIMICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido