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. 2023 Aug 8;14:4766. doi: 10.1038/s41467-023-40467-8

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© The Author(s) 2023

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. 3 — a Co K-edge X-ray absorption near-edge structure (XANES), b Fourier-transform extended X-ray absorption fine structure (EXAFS) spectra of CoIn-N-C and other reference samples, c wavelet transform (WT) contour plots of EXAFS of CoIn-N-C. d In K-edge XANES, e Fourier-transform EXAFS spectra of CoIn-N-C and other reference samples, f WT contour plots of EXAFS of CoIn-N-C. EXAFS fitting curves of g Co K-edge and h In K-edge EXAFS of CoIn-N-C, i illustration of the coordination structure of CoIn-N-C.