Understanding the Effects of Anion Interactions with Ag Electrodes on Electrochemical CO2 Reduction in Choline Halide Electrolytes

Understanding the Effects of Anion Interactions with Ag Electrodes on Electrochemical CO2 Reduction in Choline Halide Electrolytes

Interactions of electrolyte ions at electrocatalyst surfaces influence the selectivity of electrochemical CO2 reduction (CO2R) to chemical feedstocks like CO. We investigated the effects of anion type in aqueous choline halide solutions (ChCl, ChBr, and ChI) on the selectivity of CO2R to CO over an...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:ChemSusChem 2021-06, Vol.14 (12), p.2601-2611
Hauptverfasser: Garg, Sahil, Li, Mengran, Wu, Yuming, Nazmi Idros, Mohamed, Wang, Hongmin, Yago, Anya Josefa, Ge, Lei, Wang, Geoff G. X., Rufford, Thomas E.
Format: Artikel
Sprache:eng
Schlagworte:
Adsorption
Anions
Carbon dioxide
Choline
choline ions
Continuous flow
Current density
Electrocatalysts
electrochemical CO2 reduction
Electrolytes
Gaseous diffusion
halides
Metal foils
Nanoparticles
restructuring
Selectivity
Silver
specific adsorption
Surface chemistry
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Interactions of electrolyte ions at electrocatalyst surfaces influence the selectivity of electrochemical CO2 reduction (CO2R) to chemical feedstocks like CO. We investigated the effects of anion type in aqueous choline halide solutions (ChCl, ChBr, and ChI) on the selectivity of CO2R to CO over an Ag foil cathode. Using an H‐type cell, we observed that halide‐specific adsorption at the Ag surface limits CO faradaic efficiency (FECO) at potentials more positive than −1.0 V vs. reversible hydrogen electrode (RHE). At these conditions, FECO increased from I−
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.202100848