Electrocatalytic Reduction of CO 2 in Water by a Palladium-Containing Metallopolymer.
Marcos Fernando Souza TeixeiraAndré Olean-OliveiraFernanda C AnastácioDiego N David-ParraCelso X CardosoPublished in: Nanomaterials (Basel, Switzerland) (2022)
The palladium-salen complex was immobilized by electropolymerization onto a Pt disc electrode and applied as an electrocatalyst for the reduction of CO 2 in an aqueous solution. Linear sweep voltammetry measurements and rotating disk experiments were carried out to study the electrochemical reduction of carbon dioxide. The onset overpotential for carbon dioxide reduction was approximately -0.22 V vs. NHE on the poly-Pd(salen) modified electrode. In addition, by combining the electrochemical study with a kinetic study, the rate-determining step of the electrochemical CO 2 reduction reaction (CO 2 RR) was found to be the radial reduction of carbon dioxide to the CO adsorbed on the metal.