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. 2021 Aug 17;12:4679. doi: 10.1038/s41467-021-25048-x

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — a The MEA setup for paired HER(−)//EG oxidation(+). b Polarization curves for water splitting and EG electrolysis in the MEA flow reactor at a scan rate of 10 mV s⁻¹. c Current density for formate production as a function of cell voltage in literatures and this work. d Faradaic efficiency and productivity as function of current density for EG oxidation.