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Article

In Situ Regeneration of Copper-Coated Gas Diffusion Electrodes for Electroreduction of CO2 to Ethylene

1
Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland
2
Institute of Solid State Physics, University of Latvia, Kengaraga Street 8, LV-1063 Riga, Latvia
*
Authors to whom correspondence should be addressed.
Academic Editors: Federica Raganati and Paola Ammendola
Materials 2021, 14(12), 3171; https://doi.org/10.3390/ma14123171
Received: 30 April 2021 / Revised: 1 June 2021 / Accepted: 7 June 2021 / Published: 9 June 2021
(This article belongs to the Special Issue Innovation in Adsorption Processes and Materials for CO2 Capture)
A key challenge for carbon dioxide reduction on Cu-based catalysts is its low faradic efficiency (FE) and selectivity towards higher-value products, e.g., ethylene. The main factor limiting the possibilities of long-term applications of Cu-based gas diffusion electrodes (GDE) is a relatively fast drop in the catalytic activity of copper layers. One of the solutions to the catalyst stability problem may be an in situ reconstruction of the catalyst during the process. It was observed that the addition of a small amount of copper lactate to the electrolyte results in increased Faradaic efficiency for ethylene formation. Moreover, the addition of copper lactate increases the lifetime of the catalytic layer ca. two times and stabilizes the Faradaic efficiency of the electroreduction of CO2 to ethylene at ca. 30%. It can be concluded that in situ deposition of copper through reduction of copper lactate complexes present in the electrolyte provides new, stable, and selective active sites, promoting the reduction of CO2 to ethylene. View Full-Text
Keywords: copper catalysts; GDE; carbon dioxide; ethylene; electrocatalysis; copper complexes copper catalysts; GDE; carbon dioxide; ethylene; electrocatalysis; copper complexes
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MDPI and ACS Style

Bisztyga-Szklarz, M.; Mech, K.; Marzec, M.; Kalendarev, R.; Szaciłowski, K. In Situ Regeneration of Copper-Coated Gas Diffusion Electrodes for Electroreduction of CO2 to Ethylene. Materials 2021, 14, 3171. https://doi.org/10.3390/ma14123171

AMA Style

Bisztyga-Szklarz M, Mech K, Marzec M, Kalendarev R, Szaciłowski K. In Situ Regeneration of Copper-Coated Gas Diffusion Electrodes for Electroreduction of CO2 to Ethylene. Materials. 2021; 14(12):3171. https://doi.org/10.3390/ma14123171

Chicago/Turabian Style

Bisztyga-Szklarz, Magdalena, Krzysztof Mech, Mateusz Marzec, Robert Kalendarev, and Konrad Szaciłowski. 2021. "In Situ Regeneration of Copper-Coated Gas Diffusion Electrodes for Electroreduction of CO2 to Ethylene" Materials 14, no. 12: 3171. https://doi.org/10.3390/ma14123171

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