Eosin Y‐Functionalized Conjugated Organic Polymers for Visible‐Light‐Driven CO2 Reduction with H2O to CO with High Efficiency

Let the sunshine in: Eosin Y‐functionalized organic polymers exhibit high catalytic efficiency for CO₂ photoreduction in the presence of H₂O under visible‐light irradiation, affording CO as the sole carbonaceous product with a rate of 33 μmol g⁻¹ h⁻¹ and a selectivity of 92 %. No metal, sacrifice reagent, or photosensitizer are required.

Abstract

Visible‐light‐driven photoreduction of CO₂ to energy‐rich chemicals in the presence of H₂O without any sacrifice reagent is of significance, but challenging. Herein, Eosin Y‐functionalized porous polymers (PEosinY‐N, N=1–3), with high surface areas up to 610 m² g⁻¹, are reported. They exhibit high activity for the photocatalytic reduction of CO₂ to CO in the presence of gaseous H₂O, without any photosensitizer or sacrifice reagent, and under visible‐light irradiation. Especially, PEosinY‐1 derived from coupling of Eosin Y with 1,4‐diethynylbenzene shows the best performance for the CO₂ photoreduction, affording CO as the sole carbonaceous product with a production rate of 33 μmol g⁻¹ h⁻¹ and a selectivity of 92 %. This work provides new insight for designing and fabricating photocatalytically active polymers with high efficiency for solar‐energy conversion.

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