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Highly Stable π‑Extended Viologen Functionalized Hybrid Lead Halides for Near Infrared-Driven CO2-to-C2H4
Chen Sun1, Jinlin Yin1, Honghan Fei1
1Shanghai Key Laboratory of Chemical Assessment and Sustain ability, School of Chemical Science and Engineering, Tongji University, 1239 Siping Rd, Shanghai, 200092, China.
Angewandte Chemie (International Ed. in English)
|September 23, 2025
Summary
This study developed a stable, single-component hybrid lead halide photocatalyst for efficient carbon dioxide (CO2) reduction. The new material utilizes near-infrared light to convert CO2 into valuable C2 hydrocarbons like ethylene.
Area of Science:
- Materials Science
- Photocatalysis
- Green Chemistry
Background:
- Hybrid lead halides offer tunable structures and photophysical properties for CO2 photoreduction.
- Challenges include instability and inefficient C-C coupling, especially under near-infrared (NIR) light.
Purpose of the Study:
- To design a stable, single-component photocatalyst for efficient CO2 reduction using NIR light.
- To achieve selective conversion of CO2 to C2 hydrocarbons.
Main Methods:
- Incorporation of π-extended viologen units into hybrid lead halides via coordination-driven assembly to form intrinsic donor-acceptor (D-A) configurations.
- Dimensional modulation from 1D to 2D to extend NIR absorption and narrow the bandgap.
- Mechanistic investigations to understand carrier migration and CO2 reduction pathways.
Main Results:
- A single-component D-A hybrid lead halide photocatalyst with NIR absorption up to 965 nm and a bandgap of 1.28 eV was synthesized.
- Efficient electron migration from lead halide to viologen moieties generated stable N-radical species.
- Selective CO2 to C2H4 conversion with high apparent quantum yields (AQYs) of 0.81% at 700 nm and 0.38% at 800 nm was achieved.
- Mechanisms revealed enhanced *CO intermediate formation and subsequent CO-CO coupling.
Conclusions:
- The developed D-A hybrid lead halide is a promising single-component photocatalyst for efficient NIR-driven CO2 conversion to C2 hydrocarbons.
- This strategy advances the design of stable, high-performance metal halide photocatalysts for sustainable chemical production.
Keywords:
CO2 conversionCoordination polymersCrystal engineeringHybrid lead halidesNlR photocatalysisMore Related Videos
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