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The effect of residual palladium catalyst contamination on the photocatalytic hydrogen evolution activity of conjugated polymers

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Title: The effect of residual palladium catalyst contamination on the photocatalytic hydrogen evolution activity of conjugated polymers
Authors: Kosco, J
Sachs, M
Godin, R
Kirkus, M
Francas, L
Bidwell, M
Qureshi, M
Anjum, D
Durrant, JR
McCulloch, I
Item Type: Journal Article
Abstract: The effect of residual Pd on hydrogen evolution activity in conjugated polymer photocatalytic systems is systematically investigated using colloidal poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT) nanoparticles as a model system. Residual Pd, originating from the synthesis of F8BT via Pd catalyzed polycondensation polymerization, is observed in the form of homogeneously distributed Pd nanoparticles within the polymer. Residual Pd is essential for any hydrogen evolution to be observed from this polymer, and very low Pd concentrations (<40 ppm) are sufficient to have a significant effect on the hydrogen evolution reaction (HER) rate. The HER rate increases linearly with increasing Pd concentration from <1 ppm to approximately 100 ppm, at which point the rate begins to saturate. Transient absorption spectroscopy experiments support these conclusions, and suggest that residual Pd mediates electron transfer from the F8BT nanoparticles to protons in the aqueous medium.
Issue Date: 5-Dec-2018
Date of Acceptance: 16-Sep-2018
URI: http://hdl.handle.net/10044/1/65064
DOI: https://dx.doi.org/10.1002/aenm.201802181
ISSN: 1614-6832
Publisher: Wiley
Journal / Book Title: Advanced Energy Materials
Volume: 8
Issue: 34
Copyright Statement: © 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is the accepted version of the following article: J. Kosco, M. Sachs, R. Godin, M. Kirkus, L. Francas, M. Bidwell, M. Qureshi, D. Anjum, J. R. Durrant, I. McCulloch, Adv. Energy Mater. 2018, 8, 1802181., which has been published in final form at https://dx.doi.org/10.1002/aenm.201802181
Sponsor/Funder: Kaust
Engineering and Physical Sciences Research Council
Funder's Grant Number: CHEDG_P61719
Publication Status: Published
Embargo Date: 2019-10-16
Article Number: 1802181
Online Publication Date: 2018-10-16
Appears in Collections:Chemistry
Faculty of Natural Sciences



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