title: Electrochemical Capture and Release of CO2in Aqueous Electrolytes Using an Organic Semiconductor Electrode.
abstract: Developing efficient methods for capture and controlled release of carbon dioxide is crucial to any carbon capture and utilization technology. Herein we present an approach using an organic semiconductor electrode to electrochemically capture dissolved CO2in aqueous electrolytes. The process relies on electrochemical reduction of a thin film of a naphthalene bisimide derivative, 2,7-bis(4-(2-(2-ethylhexyl)thiazol-4-yl)phenyl)benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone (NBIT). This molecule is specifically tailored to afford one-electron reversible and one-electron quasi-reversible reduction in aqueous conditions while not dissolving or degrading. The reduced NBIT reacts with CO2to form a stable semicarbonate salt, which can be subsequently oxidized electrochemically to release CO2. The semicarbonate structure is confirmed by in situ IR spectroelectrochemistry. This process of capturing and releasing carbon dioxide can be realized in an oxygen-free environment under ambient pressure and temperature, with uptake efficiency for CO2capture of ∼2.3 mmol g-1. This is on par with the best solution-phase amine chemical capture technologies available today.
authors.forename: Dogukan H
authors.identifier: http://orcid.org/0000-0002-1075-8857
authors.initials: DH
authors.lastname: Apaydin
authors.affiliation: Faculty of Chemistry, University of Warsaw , 02-093 Warsaw, Poland.
authors.forename: Monika
authors.initials: M
authors.lastname: Gora
authors.affiliation: Institute of Physical Chemistry, University of Innsbruck , A-6020 Innsbruck, Austria.
authors.forename: Engelbert
authors.initials: E
authors.lastname: Portenkirchner
authors.forename: Kerstin T
authors.identifier: http://orcid.org/0000-0002-5377-649X
authors.initials: KT
authors.lastname: Oppelt
authors.forename: Helmut
authors.initials: H
authors.lastname: Neugebauer
authors.forename: Marie
authors.initials: M
authors.lastname: Jakesova
authors.affiliation: Department of Science and Technology, Linköpings Universitet , Campus Norrköping, SE-601 74 Norrköping, Sweden.
authors.forename: Eric D
authors.identifier: http://orcid.org/0000-0002-0280-8017
authors.initials: ED
authors.lastname: Głowacki
authors.affiliation: Institute of Physical Chemistry, University of Innsbruck , A-6020 Innsbruck, Austria.
authors.forename: Julia
authors.initials: J
authors.lastname: Kunze-Liebhäuser
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology , 00-664 Warsaw, Poland.
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Zagorska
authors.affiliation: Faculty of Chemistry, University of Warsaw , 02-093 Warsaw, Poland.
authors.forename: Jozef
authors.initials: J
authors.lastname: Mieczkowski
authors.forename: Niyazi Serdar
authors.initials: NS
authors.lastname: Sariciftci
keywords: carbon dioxide capture; carbonyl pigments; naphthalene bisimide; organic semiconductors; spectroelectrochemistry