Controlling the Specific CO 2 Adsorption on Electrochemically Formed Metallic Copper Surfaces - Sorbonne Université Accéder directement au contenu
Article Dans Une Revue Journal of The Electrochemical Society Année : 2018

Controlling the Specific CO 2 Adsorption on Electrochemically Formed Metallic Copper Surfaces

Résumé

The recent demonstration of the reduced overpotential for the electrochemical conversion of CO2 to CO on the surface of oxidized copper films raised the question of possible interplay existing between the electroreduction of copper to its metallic form and the adsorption of CO2 on its surface. To study this effect and better understand the factor governing the CO2 adsorption on the surface of copper-based catalysts, we studied different copper vanadates oxides known for their ability to form metallic copper particles on their surface by electroreduction in Li+-containing salt. By controlling the vanadates framework, the potential at which metallic copper is formed can be controlled and selectively be varied around the CO2/CO standard potential. Studying the reduction behavior of these phases in CO2-saturated organic media containing Li+-salt, we demonstrate that the CO2 adsorption is correlated with the potential at which Cu particles are electrochemically formed. We further show that the CO2 adsorption is correlated with the oxidation of copper, indicating that the overpotential is controlled by the step corresponding to the formation of Cu(I)CO2− intermediate.
Fichier principal
Vignette du fichier
Grimaud et al, JECS 2018 revised_sans marque.pdf (1.14 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01960994 , version 1 (19-12-2018)

Identifiants

Citer

Alexis Grimaud, Wei Yin, Florent Lepoivre, Jean‐marie Tarascon. Controlling the Specific CO 2 Adsorption on Electrochemically Formed Metallic Copper Surfaces. Journal of The Electrochemical Society, 2018, 165 (3), pp.H163-H169. ⟨10.1149/2.0031805jes⟩. ⟨hal-01960994⟩
102 Consultations
280 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More