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Selectivity control towards CO versus H$_2$ for photo-driven CO$_2$ reduction with a novel Co(II) catalyst

Gracia, Lisa-Lou ORCID iD icon 1; Henkel, Philip 1; Fuhr, Olaf ORCID iD icon 2,3; Bizzarri, Claudia 1
1 Institut für Organische Chemie (IOC), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
3 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)

Abstract:

Developing efficient catalysts for reducing carbon dioxide, a highly stable combustion waste product, is a relevant task to lower the atmospheric concentration of this greenhouse gas by upcycling. Selectivity towards CO$_2$-reduction products is highly desirable, although it can be challenging to achieve since the metal-hydrides formation is sometimes favored and leads to H$_2$ evolution. In this work, we designed a cobalt-based catalyst, and we present herein its physicochemical properties. Moreover, we tailored a fully earth-abundant photocatalytic system to achieve specifically CO$_2$ reduction, optimizing efficiency and selectivity. By changing the conditions, we enhanced the turnover number (TON) of CO production from only 0.5 to more than 60 and the selectivity from 6% to 97% after four hours of irradiation at 420 nm. Further efficiency enhancement was achieved by adding 1,1,1,3,3,3-hexafluoropropan-2-ol, producing CO with a TON up to 230, although at the expense of selectivity (54%).


Verlagsausgabe §
DOI: 10.5445/IR/1000165510
Veröffentlicht am 11.12.2023
Originalveröffentlichung
DOI: 10.3762/bjoc.19.129
Scopus
Zitationen: 3
Web of Science
Zitationen: 1
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Organische Chemie (IOC)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1860-5397
KITopen-ID: 1000165510
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Erschienen in Beilstein Journal of Organic Chemistry
Verlag Beilstein-Institut
Band 19
Seiten 1766–1775
Vorab online veröffentlicht am 17.11.2023
Schlagwörter carbon monoxide selectivity; cobalt(II) complex; copper(I) complex; earth-abundant; hexafluoropropanol; photocatalytic CO2 reduction
Nachgewiesen in Dimensions
Web of Science
Scopus
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