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Water Oxidation with Cobalt‐Loaded Linear Conjugated Polymer Photocatalysts

Sprick, RS; Chen, Z; Cowan, AJ; Bai, Y; Aitchison, CM; Fang, Y; Zwijnenburg, MA; ... Wang, X; + view all (2020) Water Oxidation with Cobalt‐Loaded Linear Conjugated Polymer Photocatalysts. Angewandte Chemie: International Edition , 59 (42) pp. 18695-18700. 10.1002/anie.202008000. Green open access

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Abstract

We report here the first examples of linear conjugated organic polymer photocatalysts that produce oxygen from water after loading with cobalt and in the presence of an electron scavenger. The oxygen evolution rates, which are higher than for related organic materials, can be rationalized by a combination of the thermodynamic driving force for water oxidation, the light absorption of the polymer, and the aqueous dispersibility of the relatively hydrophilic polymer particles. We also used transient absorption spectroscopy to study the best performing system and we found that fast oxidative quenching of the exciton occurs (picoseconds) in the presence of an electron scavenger, minimizing recombination.

Type: Article
Title: Water Oxidation with Cobalt‐Loaded Linear Conjugated Polymer Photocatalysts
Location: Germany
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/anie.202008000
Publisher version: https://doi.org/10.1002/anie.202008000
Language: English
Additional information: Copyright © 2020 The Authors. Published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Keywords: Polymer photocatalyst, oxygen production, soft photocatalyst, solar fuel, water oxidation
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10103166
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