Work

Promoting Solar‐driven Hydrogen Peroxide Production over Thiazole‐based Conjugated Polymers via Generating and Converting Singlet Oxygen

Year: 2023

Type: article

Abstract: Solar‐driven synthesis of hydrogen peroxide (H 2 O 2 ) from water and air provides a low‐cost and eco‐friendly alternative route to the traditional anthraquinone method. Herein, four thiazole‐based conjugated polymers (Tz‐CPs: TTz , BTz , TBTz and BBTz ) are synthesized via aldimine condensation. BBTz exhibits the highest H 2 O 2 production rate of 7274 μmol g −1 h −1 in pure water. Further, the reaction path is analyzed by electron paramagnetic resonance (EPR), in situ diffuse reflectance infrared Fourier transform (DRIFT) and theoretical calculation, highlighting the prominent role of singlet oxygen ( 1 O 2 ). The generation of 1 O 2 occurs through the oxidation of superoxide radical (⋅O 2 − ) and subsequent conversion into endoperoxides via [4+2] cycloaddition over BBTz , which promotes charge separation and reduces the barrier for H 2 O 2 production. This work provides new insight into the mechanism of photocatalytic O 2 reduction and the molecular design of superior single‐polymer photocatalysts.

Source: Angewandte Chemie International Edition

DOI: 10.1002/anie.202310476

Authors: Jingzhao Cheng, Sijie Wan, Shaowen Cao

Institutions: Wuhan University of Technology, State Key Laboratory of Advanced Technology For Materials Synthesis and Processing

Language: English

Topic: Advanced Photocatalysis Techniques

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China