Under constant charge conditions (non-constant electrostatic potential), the *CO–*CO coupling reaction energies are relative insensitive to the charge state at the interface and the electrolyte composition and the reaction occurs with co-adsorption of water. Under constant potential conditions, the *CO–*CO coupling reaction is stabilized at lower potentials because of charging, the reaction is influenced by the electrolyte composition, and water-coadsorption is reduced. The *CO–*CO coupling reaction changes the electrosorption valency by around 0.4–0.5. We propose a simple approach to convert energetics from constant charge to estimates at constant potential. The approach is generally applicable to electrochemical processes.
Henrik H. Kristoffersen, Karen Chan
Journal of Catalysis, Volume 396, April 2021, Pages 251-260
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