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Hanzhola Gusman Riyanto
Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Indonesia, Depok, West Java 16424, Indonesia, Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Pamulang, Pamulang, Banten 15417
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Physics

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Copper foam modified electrodes for CO₂ electroreduction: A study on deposition potential effect and flow cell performance Hanzhola Gusman Riyanto; Lewita Pasaribu; Fathur Rachman; Octaviany Magdalena; Afiten Rahmin Sanjaya
Environmental and Materials Vol. 3 No. 2: (December) 2025
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v3i2.2025.2649

Abstract

Background: The development of effective electrochemical conversion technologies is imperative due to the rising global CO2 emissions. A promising platform for CO2 reduction to formate is copper electrode, which can stabilize the carbon dioxide radical that is essential for CO2 conversion. Methods: In this work, Cu foam was electrodeposited in situ on a copper plate with sodium citrate acting as a capping agent (CuF@Cu), with variation of potential deposition were 3V and 5V. Findings: The foam structure of Cu in Cu electrode was confirmed with SEM and XRD measurements for both potential deposition variations. Furthermore, CO2 electroreduction was carried out in a flow cell under ideal conditions, which included aeration for 20 minutes, a flow rate of 75 mL min⁻¹, and an applied potential of −0.33 V vs. Ag/AgCl. For formic acid conversion, the Faradaic efficiency rose from 14.18% (Cu bare) to 26.73% (CuF@Cu 3V) which an 88.7% improvement over bare copper. Conclusion: The enhanced performance is attributed to the increased surface area and three-dimensional foam structure, which augments active sites for CO₂ activation. This work demonstrates that simple electrodeposition of copper foam is an effective strategy for improving electrochemical CO₂ reduction efficiency. Novelty/Originality of this article: These findings demonstrate that CuF@Cu makes using this straightforward electrodeposition technique a viable option for CO2 to formate conversion.
Co-Authors Afiten Rahmin Sanjaya Fathur Rachman Lewita Pasaribu Octaviany Magdalena