Year: 2025
Type: article
Abstract: We report a biomimetic system for light‐driven CO2 conversion in lipid bilayers using a [FeFe]‐hydrogenase‐inspired molecular dyad (PS‐CAT) acting simultaneously as photosensitizer and catalyst. The molecular design of PS‐CAT consists of both light‐harvesting and catalytically active moieties in a single molecule. This structure allows for efficient charge transfer between these two moieties. The PS‐CAT consists of only an organic chromophore and an iron complex. Photocatalytic reduction of CO2 to CO (CO2RR) as well as H2 production (HER) was traced over 56 h to determine CO2RR/HER selectivity. The presence of water in the lipid bilayer system allows for CO2RR selectivity >99 % over the competitive HER, outperforming previous molecular, and liposome‐based systems for light‐driven CO2 to CO conversion. The product selectivity in CO2RR (e.g., CO, HCOO−, and CH4) was determined via gas chromatography and NMR spectroscopy with 13C‐labeled carbon sources. The Stern–Volmer quenching studies on the initial light‐driven electron‐transfer revealed static quenching and indicated a preassembly of the PS‐CAT with the electron donor at the membrane‐water interface.
Source: ChemCatChem
Authors: Amir Abbas, Chizuru Kasahara, Yongchao Chen, Martin Oschatz, Stefanie Gräfe, Wolfgang Weigand, Andrea Pannwitz
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W4409915312