Cuprous Sulfide Nanoarrays for Selective Electroreduction of CO2 to Formate at Low Overpotentials

Siting Cai, Mengdi Wang, Bin Chen, Xin Xu, Linhua Mi, Borong Li, Chengkai Yang, Liuyi Li, Shenghong Zhong, Yan Yu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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 languageEnglish (US)
Pages (from-to)100383
JournalChemical Engineering Journal Advances
StatePublished - Aug 17 2022

Bibliographical note

KAUST 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.


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