Rationally Designed Cyclooctatetrathiophene‐Based Porous Aromatic Frameworks (COTh‐PAFs) for Efficient Photocatalytic Hydrogen Peroxide Production

Author:

Cao Linzhu1,Wang Cong2,Wang He1,Xu Xinmeng1,Tao Xin1ORCID,Tan Huaqiao1,Zhu Guangshan1ORCID

Affiliation:

1. Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry Education Faculty of Chemistry Northeast Normal University Changchun 130024 China

2. School of Materials Science and Engineering Changchun University of Science and Technology Changchun 130022 China

Abstract

AbstractConstructing stable and efficient photocatalysts for H2O2 production is of great importance and is challenging. In this study, the synthesis of three photoactive cyclooctatetrathiophene (COTh)‐based porous aromatic frameworks (COTh‐PAFs) in an alternating donor‐acceptor (D−A) fashion is presented. In combination with a triazine‐derived electron acceptor, PAF‐363 exhibits high efficiency for the photosynthesis of H2O2 with production rates of 11733 μmol g−1 h−1(with sacrificial agent) and 3930 μmol g−1 h−1 (without sacrificial agent) from water and oxygen under visible light irradiation. Experimental results and theoretical calculations reveal that the charge transfer positions and the O2 adsorption sites in PAF‐363 are both concentrated on COTh fragments, which facilitate the H2O2 production through the oxygen reduction reaction (ORR) pathway. This work highlights that the rational design of COTh‐PAFs with consideration of D−A direction, charge transfer positions, and O2 adsorption sites provides a feasible access to efficient H2O2 production photocatalysts.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Publisher

Wiley

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