Penot, C.; Maniam, K.K.; Paul, S. Electrochemical Characterization of Electrodeposited Copper in Amine CO2 Capture Media. Materials2024, 17, 1825.
Penot, C.; Maniam, K.K.; Paul, S. Electrochemical Characterization of Electrodeposited Copper in Amine CO2 Capture Media. Materials 2024, 17, 1825.
Penot, C.; Maniam, K.K.; Paul, S. Electrochemical Characterization of Electrodeposited Copper in Amine CO2 Capture Media. Materials2024, 17, 1825.
Penot, C.; Maniam, K.K.; Paul, S. Electrochemical Characterization of Electrodeposited Copper in Amine CO2 Capture Media. Materials 2024, 17, 1825.
Abstract
This study explores the stability of electrodeposited copper catalysts utilized in electrochemical CO2 reduction (ECR) across various amine media. The focus is on understanding the influence of different amine types, corrosion ramifications, and the efficacy of pulse ECR methodologies. Employing a suite of electrochemical techniques including potentiodynamic polarization, linear resistance polarization, cyclic voltammetry, and chronopotentiometry, the investigation reveals useful insights. The findings show that among the tested amines, CO2-rich monoethanolamine (MEA) exhibits the highest corrosion rate. However, in most cases the rates remain within tolerable limits for ECR operations. Primary amines, notably monoethanolamine (MEA), show enhanced compatibility with ECR processes, attributable to their resistance against carbonate salt precipitation and sustained stability in potential over extended durations. Conversely, tertiary amines such as methyldiethanolamine (MDEA) present challenges due to the formation of carbonate salts during ECR, impeding their effective utilization. The study highlights the effectiveness of pulse ECR strategies in stabilizing ECR. A noticeable shift in cathodic potential and reduced deposit formation on the catalyst surface through periodic oxidation underscores the efficacy of such strategies. These findings offer insights for optimizing ECR in amine media, thereby providing promising pathways for advancements in CO2 emission reduction technologies.
Keywords
Electrodeposition; Copper; Electrochemical CO2 reduction; Corrosion; Amine CO2 capture; Carbon capture and utilization
Subject
Engineering, Chemical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
