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. 2021 Nov 23;12:6806. doi: 10.1038/s41467-021-27143-5

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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. 2 — a–c Radial distribution curve from FT-EXAFS of Co-NPs/NCNS, Co₁Pt₁/NCNS, Fe-NPs/NCNS, Fe₁Pt₁/NCNS, Ni-NPs/NCNS, and Ni₁Pt₁/NCNS, respectively, as well as their corresponding foil and oxide reference at Co, Fe, and Ni K edges. d–f Wavelet-transformed spectra of Co₁Pt₁/NCNS, Fe₁Pt₁/NCNS, Ni₁Pt₁/NCNS, as well as their corresponding foil and oxide reference at Co, Fe, and Ni K edges. g and h XANES and FT-EXAFS of Pt₁/NCNS, Co₁Pt₁/NCNS, Fe₁Pt₁/NCNS, and Ni₁Pt₁/NCNS, respectively, as well as Pt foil and PtO₂ reference at Pt L₃ edge. i ICP-OES results of M (Fe, Co, and Ni) metal loadings.