Principal Descriptors of Ionic Liquid Co-catalysts for the Electrochemical Reduction of CO2
Source abstract
Abstract
Electrochemical reduction of carbon dioxide (CO2RR) is promoted by ionic liquid (IL) co-catalysts, and several mechanisms have been proposed to explain their role. Due to the complexity of the CO2RR and the limited number of active IL co-catalysts, a consensus on the precise role of ILs has not been reached, and it is not possible to improve their activity in a rational way. Herein, we describe guanidinium (Gua) ILs that act as co-catalysts for the CO2RR when employed in non-aqueous electrolytes. The peripheral substituents of the Gua cation were systematically modified allowing the IL co-catalytic properties to be fine-tuned, and on the basis of the observed substitution effects, charge delocalization and availability were shown to be the critical descriptors determining co-catalytic activity. These descriptors can be used to rationalize activity trends for other classes of IL co-catalysts.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ionic liquids properties and applications · Catalysis and Oxidation Reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov st. 8, 420088 Kazan, Russia
Group for Molecular Engineering of Functional Materials, École Polytechnique Fédérale de Lausanne (EPFL), CH-1951 Sion, Switzerland
Funding
Schweizerischer Nationalfonds zur F?rderung der Wissenschaftlichen Forschung · ?cole Polytechnique F?d?rale de Lausanne · Swiss Competence Center for Energy Research · Frumkin Institute of Physical Chemistry and Electrochemistry RAS
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