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Original title:
Perforated Microporous Layers Suppress Flooding in Gas Diffusion Electrodes for High-Current-Density CO2 Electroreduction
Authors: Hrdlička, Vojtěch ; Dostálková, Lucie ; Pilař, Radim ; Sazama, Petr ; Sádovská, Galina ; Khalilullah, Umar ; Petráková, Vladimíra ; Bouša, M. ; Vaněčková, Eva ; Kolivoška, Viliam
Document type: Papers
Conference/Event: Modern Electrochemical Methods /45./, Jetřichovice (CZ), 20260525
Year: 2026
Language: eng
Abstract: Electrochemical CO₂ reduction (CO₂RR) in gas diffusion electrodes (GDEs) is limited by electrolyte flooding at high current densities. Here, we introduce artificial perforations into the microporous layer (MPL) as drainage pathways and compare them with compact and naturally cracked GDEs. Silver-based electrodes were tested at 100–400 mA cm−2 for ~3 h. Compact GDEs showed rapid performance decay (FE(CO) 10–20%), while perforated GDEs maintained FE(CO) near unity at 100 mA cm⁻² and >50% at 400 mA cm⁻². Cracked GDEs performed slightly better (~65%). These results demonstrate that controlled MPL structuring mitigates flooding and improves CO₂ transport at industrially relevant current densities.
Keywords: electrochemical carbon dioxide reduction; electrode flooding; gas diffusion electrode
Project no.: GA23-07292S (CEP), LM2023066 (CEP)
Funding provider: GA ČR, GA MŠk
Host item entry: Proceedings of the International Conference 45th Modern Electrochemical Methods, ISBN 978-80-908947-3-0
Institution: J. Heyrovsky Institute of Physical Chemistry AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0379760
Permalink: http://www.nusl.cz/ntk/nusl-778764
The record appears in these collections:
Research > Institutes ASCR > J. Heyrovsky Institute of Physical Chemistry
Conference materials > Papers
Authors: Hrdlička, Vojtěch ; Dostálková, Lucie ; Pilař, Radim ; Sazama, Petr ; Sádovská, Galina ; Khalilullah, Umar ; Petráková, Vladimíra ; Bouša, M. ; Vaněčková, Eva ; Kolivoška, Viliam
Document type: Papers
Conference/Event: Modern Electrochemical Methods /45./, Jetřichovice (CZ), 20260525
Year: 2026
Language: eng
Abstract: Electrochemical CO₂ reduction (CO₂RR) in gas diffusion electrodes (GDEs) is limited by electrolyte flooding at high current densities. Here, we introduce artificial perforations into the microporous layer (MPL) as drainage pathways and compare them with compact and naturally cracked GDEs. Silver-based electrodes were tested at 100–400 mA cm−2 for ~3 h. Compact GDEs showed rapid performance decay (FE(CO) 10–20%), while perforated GDEs maintained FE(CO) near unity at 100 mA cm⁻² and >50% at 400 mA cm⁻². Cracked GDEs performed slightly better (~65%). These results demonstrate that controlled MPL structuring mitigates flooding and improves CO₂ transport at industrially relevant current densities.
Keywords: electrochemical carbon dioxide reduction; electrode flooding; gas diffusion electrode
Project no.: GA23-07292S (CEP), LM2023066 (CEP)
Funding provider: GA ČR, GA MŠk
Host item entry: Proceedings of the International Conference 45th Modern Electrochemical Methods, ISBN 978-80-908947-3-0
Institution: J. Heyrovsky Institute of Physical Chemistry AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0379760
Permalink: http://www.nusl.cz/ntk/nusl-778764
The record appears in these collections:
Research > Institutes ASCR > J. Heyrovsky Institute of Physical Chemistry
Conference materials > Papers
Record created 2026-07-18, last modified 2026-07-24