The Importance of Acid–Base Equilibria in Bicarbonate Electrolytes for CO<sub>2</sub> Electrochemical Reduction and CO Reoxidation Studied on Au(<i>hkl</i>) Electrodes
Giulia Marcandalli, Matías Villalba, Marc T. M. Koper
Abstract
and the concentration of the bicarbonate) and voltammetric parameters. In this way, we identify different regimes of surface pH and bicarbonate speciation, as a function of the current and electrolyte conditions. We reveal the importance of the acid-base bicarbonate/carbonate couple, not only as a buffering equilibrium but also as species involved in the electrochemical reactions under study.
Topics & Concepts
BicarbonateElectrochemistryElectrolyteChemistryInorganic chemistryRedoxElectrocatalystAdsorptionElectrodePhysical chemistryOrganic chemistryCO2 Reduction Techniques and CatalystsElectrocatalysts for Energy ConversionElectrochemical Analysis and Applications