2026-04-17T00:56:49Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1819912025-12-04T21:00:55Zcom_2072_1057col_2072_478796col_2072_478917

00925njm 22002777a 4500 dc Piqué, Oriol author Löffler, Mario author Katsounaros, Ioannis author Calle Vallejo, Federico author 2021-12-23T15:44:17Z 2021-12-23T15:44:17Z 2021 2021-12-23T15:44:17Z The electrocatalytic reduction of CO2 (CO2RR) is a promising yet intricate process to alleviate the alarming imbalance in the carbon cycle. One of the intricacies of CO2RR is its structural sensitivity, which is illustrated by the varying onset potentials and selectivities of the reaction products depending on the electrode morphology. Here, using electrochemical real-time mass spectrometry (EC-RTMS), we accurately determine the onset potentials for seven CO2RR products including C1, C2, and C3 species on polycrystalline and oxide-derived Cu electrodes. Density functional theory calculations affordably including solvent and cation effects produce onset potentials of C2 species matching those obtained with EC-RTMS. Our analysis leads us to conclude that the elusive active sites at oxide-derived Cu, known to enhance ethanol production, are undercoordinated square ensembles of Cu atoms. Coure Diòxid de carboni Electrocatàlisi Copper Carbon dioxide Electrocatalysis Computational-experimental study of the onset potentials for CO2 reduction on polycrystalline and oxide-derived copper electrodes