Trace-Level Cobalt Dopants Enhance CO2 Electroreduction and Ethylene Formation on Copper

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Trace-Level Cobalt Dopants Enhance CO2 Electroreduction and Ethylene Formation on Copper
Title:
Trace-Level Cobalt Dopants Enhance CO2 Electroreduction and Ethylene Formation on Copper
Journal Title:
ACS Energy Letters
Publication Date:
14 July 2023
Citation:
Kim, B., Tan, Y. C., Ryu, Y., Jang, K., Abbas, H. G., Kang, T., Choi, H., Lee, K.-S., Park, S., Kim, W., Choi, P.-P., Ringe, S., & Oh, J. (2023). Trace-Level Cobalt Dopants Enhance CO2 Electroreduction and Ethylene Formation on Copper. ACS Energy Letters, 3356–3364. https://doi.org/10.1021/acsenergylett.3c00418
Abstract:
The development of Cu-based catalysts for electrochemical CO2 reduction reaction (CO2RR) with stronger CO-binding elements had been unsuccessful in improving multicarbon production from the CO2RR due to CO-poisoning. Here, we discover that trace doping levels of Co atoms in Cu, termed CoCu single-atom alloy (SAA), achieve up to twice the formation rate of CO as compared to bare Cu and further demonstrate a high jC2H4 of 282 mA cm–2 at −1.01 VRHE in a neutral electrolyte. From DFT calculations, Cu sites neighboring CO-poisoned Co atomic sites accelerate CO2-to-CO conversion and enhance the coverage of *CO intermediates required for the formation of multicarbon products. Furthermore, CoCu SAA also exhibits active sites that favor the deoxygenation of *HOCCH, which increases the selectivity toward ethylene over ethanol. Ultimately, CoCu SAA can simultaneously boost the formation of *CO intermediates and modulate the selectivity toward ethylene, resulting in one of the highest ethylene yields of 15.6%.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the Agency for Science, Technology and Research (A*STAR) - Career Development Fund (CDF)
Grant Reference no. : C222812030

This research was generously supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science and ICT (MSIT), Republic of Korea (NRF2020M3H7A1096388, NRF-2021R1A2C3007280, NRF-2021R1A5A1084921, NRF-2022M3J7A1084660 and NRF-2021R1C1C1008776).
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Energy Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsenergylett.3c00418
ISSN:
2380-8195
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