Photocatalytic Hydrogen Evolution from Water Using Fluorene and Dibenzothiophene Sulfone-Conjugated Microporous and Linear Polymers



Sprick, Reiner Sebastian, Bai, Yang, Guilbert, Anne AY, Zbiri, Mohamed, Aitchison, Catherine M, Wilbraham, Liam, Yan, Yong, Woods, Duncan J, Zwijnenburg, Martijn A and Cooper, Andrew I
(2019) Photocatalytic Hydrogen Evolution from Water Using Fluorene and Dibenzothiophene Sulfone-Conjugated Microporous and Linear Polymers. CHEMISTRY OF MATERIALS, 31 (2). pp. 305-313.

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Abstract

Three series of conjugated microporous polymers (CMPs) were studied as photocatalysts for hydrogen production from water using a sacrificial hole scavenger. In all cases, dibenzo[b,d]thiophene sulfone polymers outperformed their fluorene analogues. A porous network, S-CMP3, showed the highest hydrogen evolution rates of 6076 μmol h -1 g -1 (λ > 295 nm) and 3106 μmol h -1 g -1 (λ > 420 nm), with an external quantum efficiency of 13.2% at 420 nm. S-CMP3 outperforms its linear structural analogue, P35, whereas in other cases, nonporous linear polymers are superior to equivalent porous networks. This suggests that microporosity might be beneficial for sacrificial photocatalytic hydrogen evolution, if suitable linkers are used that do not limit charge transport and the material can be wetted by water as studied here by water sorption and quasi-elastic neutron scattering.

Item Type: Article
Uncontrolled Keywords: 40 Engineering, 4016 Materials Engineering, 34 Chemical Sciences, 7 Affordable and Clean Energy
Depositing User: Symplectic Admin
Date Deposited: 30 Jan 2019 17:10
Last Modified: 21 Jun 2024 17:15
DOI: 10.1021/acs.chemmater.8b02833
Open Access URL: https://pubs.acs.org/doi/10.1021/acs.chemmater.8b0...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3032030