Covalent triazine-based frameworks with cobalt-loading for visible light-driven photocatalytic water oxidation

Chen, Hongmei and Gardner, Adrian M. and Lin, Guoan and Zhao, Wei and Bahri, Mounib and Browning, Nigel D. and Sprick, Reiner Sebastian and Li, Xiaobo and Xu, Xiaoxiang and Cooper, Andrew I. (2022) Covalent triazine-based frameworks with cobalt-loading for visible light-driven photocatalytic water oxidation. Catalysis Science and Technology, 12 (17). pp. 5442-5452. ISSN 2044-4753 (https://doi.org/10.1039/d2cy00773h)

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Abstract

Conjugated polymers have received significant attention as photocatalysts. However, photocatalytic oxygen evolution has only been reported for a few polymers so far. Here, we present a bipyridine based covalent triazine-based framework containing metal coordination sites (Bpy-CTF). The material is highly active for sacrificial photocatalytic oxygen evolution with a rate of 322 μmol g−1 h−1 under visible light illumination (≥420 nm) after post-synthetic cobalt coordination. An analogous photocatalyst containing biphenyl was found to be less active as it is not able to coordinate cobalt. Transient absorption spectroscopy studies showed that the cobalt coordinated in the bipyridine units of Bpy-CTF promotes charge separation and transfer, thus increasing water oxidation activity. The study demonstrates the growing potential of polymer photocatalysts for oxygen evolution by structural engineering and post-synthetic metalation.

ORCID iDs

Chen, Hongmei, Gardner, Adrian M., Lin, Guoan, Zhao, Wei, Bahri, Mounib, Browning, Nigel D., Sprick, Reiner Sebastian ORCID logoORCID: https://orcid.org/0000-0002-5389-2706, Li, Xiaobo, Xu, Xiaoxiang and Cooper, Andrew I.;
  • Item type:Article
    ID code:81980
    Dates:
    Date
    Event
    27 July 2022
    Published
    27 July 2022
    Published Online
    27 July 2022
    Accepted
    Subjects:Science > Chemistry
    Department:Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:23 Aug 2022 14:47
    Last modified:11 Nov 2024 13:36
    URI:https://strathprints.strath.ac.uk/id/eprint/81980
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