Issue 9, 2024

Polymerized ionic liquid Co-catalysts driving photocatalytic CO2 transformation

Abstract

Photocatalytic production of CO from CO2 has the potential for safe and atom-economic production of feedstock chemicals via in situ carbonylation chemistry. We developed novel ionic liquid-based polymeric materials through radical copolymerisation of 1-butyl-3-vinylimidazolium chloride and photocatalytically active Re- and Ru-complexes that serve as the CO2 reduction catalyst and photosensitiser, respectively. The crosslinked polymeric framework allows for the facile immobilisation of molecular organometallic complexes for use as heterogenised catalysts; moreover, the involved imidazolium core units co-catalyze the reduction of CO2via covalent interaction. The ratio of sensitiser and catalyst was analysed by laser ablation inductively coupled plasma mass spectroscopy (LA-ICP-MS) and set in relation to results from photocatalytic experiments. Ultimately, the heterogenous polymeric framework showed high selectivity for CO formation on photocatalytic CO2 reduction with improved stability to the corresponding homogenous system.

Graphical abstract: Polymerized ionic liquid Co-catalysts driving photocatalytic CO2 transformation

Supplementary files

Article information

Article type
Paper
Submitted
23 Apr 2024
Accepted
08 Jul 2024
First published
17 Jul 2024
This article is Open Access
Creative Commons BY license

RSC Sustain., 2024,2, 2524-2531

Polymerized ionic liquid Co-catalysts driving photocatalytic CO2 transformation

L. Eisele, B. Hulaj, M. Podsednik, F. Laudani, P. Ayala, A. Cherevan, A. Foelske, A. Limbeck, D. Eder and K. Bica-Schröder, RSC Sustain., 2024, 2, 2524 DOI: 10.1039/D4SU00194J

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