Assessing the electrochemical CO2 reduction reaction performance requires more than reporting coulombic efficiency
Izadi, Paniz (Helmholtz Centre for Environmental Research (Leipzig, Alemanya))
Song, Jia (Vlaamse Instelling voor Technologisch Onderzoek)
Singh, Chandani (Vlaamse Instelling voor Technologisch Onderzoek)
Pant, Deepak (Vlaamse Instelling voor Technologisch Onderzoek)
Harnisch, Falk (Helmholtz Centre for Environmental Research (Leipzig, Alemanya))

Date:	2024
Abstract:	Reporting coulombic efficiency (CE) is the common way to assess the performance of electrochemical carbon dioxide (CO2) reduction reaction (eCO2RR) in literature, whereas its carbon conversion efficiency (CCE) is frequently neglected. Herein, the importance of reporting both efficiencies when evaluating the eCO2RR is discussed, using Sn-based gas diffusion electrodes (GDEs) as model electrodes. It is shown that can vary remarkably at a constant with minor perational changes. Over 120 min experiments with operational conditions being representative of numerous previous studies, the is increased from ≈20% to 41% (being only 9% below the theoretical maximum). This was achieved by simply Adjusting the inlet CO2 flow rate from ≈35 to 16 mL min−1, while was identical at both CO2 flow rates (≈85%, 7%, and 4% for production of formate/formic acid, CO, and H2, respectively at both conditions). Thus, it is advocated that reporting of both efficiencies, for electrons and carbon, is required for meaningfully assessing the performance of an eCO2RR system.
Grants:	European Commission 101000441
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Carbon conversion efficiency ; Electrochemical CO2 reduction reaction ; Gas diffusion electrodes
Published in:	Advanced Energy & Sustainability research, (February 2024) , art. 2400031, ISSN 2699-9412

DOI: 10.1002/aesr.202400031

Article 7 p, 998.5 KB

Supporting information 10 p, 902.3 KB

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