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- W2907192077 abstract "Surplus electricity obtained from renewable energy sources requires suitable large-scale storage. Future CO2 electrolysis devices promise to offer a convenient route to store large quantities of excess electricity in the form of synthetic fuels, such as methane, ethylene, or oxygenates. In this work, we explored the strategies to support long-term stability in electrocatalytic CO2 conversion to CO, hydrocarbons, and alcohols. We show how electrochemical preoxidation of copper electrodes used as catalyst may ensure longer-lasting activity and selectivity in CO2 reduction. We demonstrate that EDTA as an electrolyte additive can be a realiable impurity scavenger, especially combined with a catalyst pretreatment at anodic potentials. An unprecedented rate retention after 20 h electrolysis on a model polycrystalline copper was 91% for ethylene in the case when both anodic surface preoxidation and sufficient additive are applied. Additionally, we established that EDTA exhibits an additional role to being exclusively a chelating agent. We propose that local pH stabilization and increased CO2 concentration near the electrode surface also contribute to long-term stability and improved CO2 reduction selectivities." @default.
- W2907192077 created "2019-01-11" @default.
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- W2907192077 date "2019-01-04" @default.
- W2907192077 modified "2023-10-18" @default.
- W2907192077 title "Catalyst Preoxidation and EDTA Electrolyte Additive Remedy Activity and Selectivity Declines During Electrochemical CO<sub>2</sub> Reduction" @default.
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- W2907192077 doi "https://doi.org/10.1021/acs.jpcc.8b08794" @default.
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