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High-rate and selective conversion of CO₂ from aqueous solutions to hydrocarbons

Chemistry

High-rate and selective conversion of CO₂ from aqueous solutions to hydrocarbons

C. A. Obasanjo, G. Gao, et al.

Unlock the potential of renewable energy with groundbreaking research by Cornelius A. Obasanjo, Guorui Gao, Jackson Crane, Viktoria Golovanova, F. Pelayo García de Arquer, and Cao-Thang Dinh. This study introduces an innovative electrochemical system for converting carbon dioxide into methane with over 70% efficiency, offering a sustainable solution for electricity storage and emissions reduction.

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Playback language: English
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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