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. 2024 Jul 13;15:5913. doi: 10.1038/s41467-024-50118-1

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© The Author(s) 2024

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a Effect of Cu content in Cu-PCN on catalytic product yield in contact-electro-catalysis within 5 h. b Effect of Cu-PCN content on the yield of catalytic products in contact-electro-catalysis within 5 h. c Calculation of transferred charges during contact-electro-catalytic CO₂RR. The inset is a magnification of the start and end of the integrated charge. d GC spectrum of contact-electro-catalytic CO₂RR with ¹³CO₂ as the gas source. e Chromatogram of ¹³CO₂ contact-electro-catalytic reduction in selected ion monitoring (SIM) mode. f GC-MS of CO in the isotope experiment within ¹³CO₂ as the gas source for contact-electro-catalytic reaction. g Cycle runs of contact-electro-catalytic CO₂RR. h Changes in the output current of the TENG before and after the cyclic runs. Source data are provided as a Source Data file.