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Photocatalytic overall water splitting under visible light enabled by a particulate conjugated polymer loaded with iridium

Bai, Yang; Li, Chao; Liu, Lunjie; Yamaguchi, Yuichi; Bahri, Mounib; Yang, Haofan; Gardner, Adrian; ... Sprick, Reiner Sebastian; + view all (2022) Photocatalytic overall water splitting under visible light enabled by a particulate conjugated polymer loaded with iridium. Angewandte Chemie International Edition , 61 (26) , Article e202201299. 10.1002/anie.202201299. Green open access

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Abstract

Polymer photocatalysts have received growing attention in recent years for photocatalytic hydrogen production from water. Most studies report hydrogen production with sacrificial electron donors, which is unsuitable for large-scale hydrogen energy production. Here we show that the palladium/iridium oxide-loaded homopolymer of dibenzo[b,d]thiophene sulfone (P10) facilitates overall water splitting to produce stoichiometric amounts of H2 and O2 for an extended period (>60 hours) after the system stabilized. These results demonstrate that conjugated polymers can act as single component photocatalytic systems for overall water splitting when loaded with suitable co-catalysts, albeit currently with low activities. Transient spectroscopy shows that the IrO2 co-catalyst plays an important role in the generation of the charge separated state required for water splitting, with evidence for fast hole transfer to the co-catalyst.

Type: Article
Title: Photocatalytic overall water splitting under visible light enabled by a particulate conjugated polymer loaded with iridium
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/anie.202201299
Publisher version: https://doi.org/10.1002/anie.202201299
Language: English
Additional information: Copyright © 2022 The Authors. 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: water splitting, conjugated polymers, photocatalysis, hydrogen production, co-catalysts
UCL classification: 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
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10146528
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