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Issue 6, 2019
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Emulsion polymerization derived organic photocatalysts for improved light-driven hydrogen evolution

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Abstract

Here, we present the use of mini-emulsion polymerization to generate small particle analogues of three insoluble conjugated polymer photocatalysts. These materials show hydrogen evolution rates with a sacrificial donor under broadband illumination that are between two and three times higher than the corresponding bulk polymers. The most active emulsion particles displayed a hydrogen evolution rate of 60.6 mmol h−1 g−1 under visible light (λ > 420 nm), which is the highest reported rate for an organic polymer. More importantly, the emulsion particles display far better catalytic lifetimes than previous polymer nanoparticles and they are also effective at high concentrations, allowing external quantum efficiencies as high as 20.4% at 420 nm. A limited degree of aggregation of the polymer particles maximizes the photocatalytic activity, possibly because of light scattering and enhanced light absorption.

Graphical abstract: Emulsion polymerization derived organic photocatalysts for improved light-driven hydrogen evolution

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Publication details

The article was received on 26 Nov 2018, accepted on 17 Dec 2018 and first published on 22 Jan 2019


Article type: Communication
DOI: 10.1039/C8TA11383A
Citation: J. Mater. Chem. A, 2019,7, 2490-2496
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    Emulsion polymerization derived organic photocatalysts for improved light-driven hydrogen evolution

    Catherine M. Aitchison, R. S. Sprick and A. I. Cooper, J. Mater. Chem. A, 2019, 7, 2490
    DOI: 10.1039/C8TA11383A

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