This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/27174 in citations.
Please use the identifier: http://dx.doi.org/10.1021/acs.jpcc.0c09107 in citations.
Oxide Reduction Precedes Carbon Dioxide Reduction on Oxide-Derived Copper Electrodes
Oxide Reduction Precedes Carbon Dioxide Reduction on Oxide-Derived Copper Electrodes
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 po...
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Personal Name(s): | Löffler, Mario (Corresponding author) |
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Mayrhofer, Karl J. J. / Katsounaros, Ioannis | |
Contributing Institute: |
Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien; IEK-11 |
Published in: |
The journal of physical chemistry |
Imprint: |
Washington, DC
Soc.
2021
|
DOI: |
10.1021/acs.jpcc.0c09107 |
Document Type: |
Journal Article |
Research Program: |
Power-based Fuels and Chemicals |
Link: |
Restricted Restricted Published on 2021-01-14. Available in OpenAccess from 2022-01-14. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1021/acs.jpcc.0c09107 in citations.
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. |