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. 2020 Mar 16;11:1409. doi: 10.1038/s41467-020-15141-y

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© The Author(s) 2020

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. 4 — a Zn K-edge XANES spectra of Zn foil, ZnO, PcCu-O₈-Zn samples. b Cu K-edge XANES spectra of Cu foil, CuO, PcCu-O₈-Zn samples. c Zn K-edge Fourier transform EXAFS spectra of Zn foil, ZnO and PcCu-O₈-Zn samples. d Cu K-edge Fourier transform EXAFS spectra of Cu foil, CuO and PcCu-O₈-Zn samples.e, f Operando SEIRA spectro-electrochemical analysis of PcZn-O₈-Cu/CNT (e) and PcCu-O₈-Zn/CNT (f) in CO₂-saturated 0.1 M KHCO₃. As reference, a SEIRA spectrum of the system at −0.6 V vs. Ag/AgCl was taken.