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Abstract
Electrochemical carbon dioxide (CO2) conversion to hydrocarbon fuels offers a promising solution for renewable electricity storage. This research demonstrates an electrochemical conversion system achieving high methane (CH4) selectivity at high currents. The system uses proton-bicarbonate-CO2 mass transport management and in-situ copper (Cu) activation. Open matrix Cu electrodes maintain CO2 concentration, while alternating current operation maintains CH4 selectivity. CH4 Faradaic efficiencies exceeded 70% (100–750 mA cm²) with stability for at least 12 h at 500 mA cm², yielding a CH4 concentration of 23.5% in the gas product stream.
Publisher
Nature Communications
Published On
Jun 01, 2023
Authors
Cornelius A. Obasanjo, Guorui Gao, Jackson Crane, Viktoria Golovanova, F. Pelayo García de Arquer, Cao-Thang Dinh
Tags
electrochemical conversion
carbon dioxide
methane selectivity
renewable energy
Faradaic efficiency
mass transport management
copper electrodes

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