Transformation of carbon dioxide to useful fuels or chemicals is desirable to build up a sustainable society. In this study, we demonstrate that Cu2S has great potential for electrochemical CO2 reduction. They enable the selective CO2 reduction to formate starting at a low overpotential (∼ 120 mV), with high current density (over -20 mA/cm2 at -0.89 VRHE), and good Faradaic efficiency (>75%) over a broad potential window (-0.7 VRHE to -0.9 VRHE). X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and in-situ Raman spectroscopy studies reveal that Cu2S catalysts are electrochemically stable under the reaction conditions. Further-more, Cu2S catalysts show excellent durability without deactivation following more than 15 cycles (1.0 h per cycle) of operation.
|Original language||English (US)|
|Journal||Chemical Engineering Journal Advances|
|State||Published - Aug 17 2022|
Bibliographical noteKAUST Repository Item: Exported on 2022-09-14
Acknowledgements: This work was supported primarily by National Key Research and Development Program of China (2020YFA0710303). The authors thank the support from National Natural Science Foundation of China (No. U1905215, 51672046, 51672047 and 22109025), Natural Science Foundation of Fujian Province, China (2021J01230192), Scientific Research Foundation of Fuzhou University (510936) and King Abdullah University of Science and Technology.