title: Electrocatalytic CO2Reduction to Formate at Low Overpotentials on Electrodeposited Pd Films: Stabilized Performance by Suppression of CO Formation.
abstract: Palladium nanoparticles are effective for catalytic CO2reduction. However, CO, one of the most important products in the CO2reduction sequence, has strong affinity for the Pd surface and poisons the catalytic sites rapidly. In this research, an electrodeposited Pd film exhibits high activity for CO2reduction to formate with the suppression of CO formation at low overpotentials. The substrates, electrodeposition process and the post-treatment of the Pd films affect the CO2reduction pathway significantly. The cyclic voltammetry deposition produces films that exhibit more porous morphologies and have higher current efficiencies for formate than those of films produced at constant potential. These films show stable CO2reduction performance at low overpotentials and have high current efficiencies (≈50-60 % depending on the substrate) for formate formation at a potential of -0.4 V versus the reversible hydrogen electrode without any detectable CO formation. It seems that the Pd surface generated by the new electrodeposition process described here produces a nanostructure that can promote formate formation and suppress CO formation.
authors.affiliation: ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, VIC, 3800, Australia.|School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
authors.forename: Fengling
authors.identifier: 0000-0003-4357-4453
authors.initials: F
authors.lastname: Zhou
authors.affiliation: School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
authors.forename: Haitao
authors.initials: H
authors.lastname: Li
authors.affiliation: ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, VIC, 3800, Australia.|School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
authors.forename: Maxime
authors.initials: M
authors.lastname: Fournier
authors.affiliation: ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, VIC, 3800, Australia.|School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
authors.forename: Douglas R
authors.initials: DR
authors.lastname: MacFarlane
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D004563:Electrochemistry; D004566:Electrodes; D004595:Electroplating; D005561:Formates / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*
chemical_list: D005561:Formates; D002245:Carbon Dioxide; D010165:Palladium
keywords: electrochemistry; nanostructures; palladium; reduction; thin films