Linear Conjugated Polymers for Solar-Driven Hydrogen Peroxide Production: The Importance of Catalyst Stability



Liu, Lunjie, Gao, Mei-Yan, Yang, Haofan, Wang, Xiaoyan, Li, Xiaobo and Cooper, Andrew I
(2021) Linear Conjugated Polymers for Solar-Driven Hydrogen Peroxide Production: The Importance of Catalyst Stability. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 143 (46). pp. 19287-19293.

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Abstract

Hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) is one of the most important industrial oxidants. In principle, photocatalytic H<sub>2</sub>O<sub>2</sub> synthesis from oxygen and H<sub>2</sub>O using sunlight could provide a cleaner alternative route to the current anthraquinone process. Recently, conjugated organic materials have been studied as photocatalysts for solar fuels synthesis because they offer synthetic tunability over a large chemical space. Here, we used high-throughput experiments to discover a linear conjugated polymer, poly(3-4-ethynylphenyl)ethynyl)pyridine (DE7), which exhibits efficient photocatalytic H<sub>2</sub>O<sub>2</sub> production from H<sub>2</sub>O and O<sub>2</sub> under visible light illumination for periods of up to 10 h or so. The apparent quantum yield was 8.7% at 420 nm. Mechanistic investigations showed that the H<sub>2</sub>O<sub>2</sub> was produced via the photoinduced stepwise reduction of O<sub>2</sub>. At longer photolysis times, however, this catalyst decomposed, suggesting a need to focus the photostability of organic photocatalysts, as well as the initial catalytic production rates.

Item Type: Article
Uncontrolled Keywords: 3403 Macromolecular and Materials Chemistry, 34 Chemical Sciences, 3406 Physical Chemistry, 40 Engineering, 4004 Chemical Engineering, 4016 Materials Engineering, 7 Affordable and Clean Energy
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 20 Jan 2022 10:29
Last Modified: 22 Jun 2024 14:51
DOI: 10.1021/jacs.1c09979
Open Access URL: https://doi.org/10.1021/jacs.1c09979
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3147252