Löffler M, Mayrhofer K, Katsounaros I (2021)
Publication Type: Journal article
Publication year: 2021
Herein, we focus on the time and potential dynamics of the carbon dioxide electroreduction reaction and investigate the effects during the first seconds after applying a reductive potential to an oxide-derived copper electrode in a three-electrode cell. Thereby, we aim to investigate a widespread point of contention about the in situ active phase of initially oxidized copper catalysts under reductive reaction conditions. For this purpose, we utilize the electrochemical real-time mass spectrometry approach developed for such investigations requiring high temporal resolution. By applying three different electrochemical protocols, we come to the same conclusion in all three cases: the reduction of the oxide catalyst precedes the formation of products on either a time or potential scale. Intriguingly, after proper compensation for the electrolyte resistance, we show that the evolution of products in a first negative-going scan right after the thermal treatment of the electrode is identical to consecutive scans on the reduced electrode and that the oxide reduction in the first scan takes place at a more positive potential than the onset of product formation.
APA:
Löffler, M., Mayrhofer, K., & Katsounaros, I. (2021). Oxide Reduction Precedes Carbon Dioxide Reduction on Oxide-Derived Copper Electrodes. Journal of Physical Chemistry C. https://doi.org/10.1021/acs.jpcc.0c09107
MLA:
Löffler, Mario, Karl Mayrhofer, and Ioannis Katsounaros. "Oxide Reduction Precedes Carbon Dioxide Reduction on Oxide-Derived Copper Electrodes." Journal of Physical Chemistry C (2021).
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