Investigating the role of potassium cations during electrochemical CO2 reduction

Journal article (2022)

Authors

S. Chandrashekar ChemE/Materials for Energy Conversion and Storage - AS
H.P. Iglesias van Montfort ChemE/Materials for Energy Conversion and Storage - AS
D. Bohra ChemE/Materials for Energy Conversion and Storage - AS
G.A. Filonenko ChemE/Inorganic Systems Engineering - AS
Georgy A. Filonenko ChemE/Inorganic Systems Engineering - AS
J.J.C. Geerlings ChemE/Materials for Energy Conversion and Storage - AS
T.E. Burdyny ChemE/Materials for Energy Conversion and Storage - AS
Thomas Burdyny ChemE/Materials for Energy Conversion and Storage - AS
W.A. Smith ChemE/Materials for Energy Conversion and Storage - AS
Research Group
ChemE/Materials for Energy Conversion and Storage (AS) (TU Delft)
Copyright: © 2022 S. Chandrashekar, H.P. Iglesias van Montfort, D. Bohra, G.A. Filonenko, J.J.C. Geerlings, T.E. Burdyny, W.A. Smith
DOI: https://doi.org/10.1039/d2nr03438g
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Published Date

2022

Language

English

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Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Materials for Energy Conversion and Storage

Abstract

The specific identity of electrolyte cations has many implications in various electrochemical reactions. However, the exact mechanism by which cations affect electrochemical reactions is not agreed upon in the literature. In this report, we investigate the role of cations during the electrochemical reduction of CO2 by chelating the cations with cryptands, to change the interaction of the cations with the components of the electric double layer. As previously reported we do see the apparent suppression of CO2 reduction in the absence of cations. However, using in situ-SEIRAS we see that CO2 reduction does indeed take place albeit at very reduced scales. We also observe that cations play a role in tuning the absorption strengths of not only CO2 as has been speculated, but also that of reaction products such as CO.

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