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. 2023 Mar 14;14:1426. doi: 10.1038/s41467-023-37066-y

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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 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, b Aberration-corrected HAADF-STEM image of Co HSACs (a) and corresponding EDX mapping of C, N, Co, and overlay (b). Scale bars, 100 nm (b). c Aberration-corrected atomic-resolution HAADF-STEM image of Co HSACs. The bright spots of Co atoms are marked with red circles. d Comparison of ORR performance at 1600 rpm and the simultaneous H₂O₂ detection current densities at the ring electrode for Co HSACs, Co HSACs-F, Co HSACs-CH₃, CoPc/CNT, and CoPc in 0.1 M KOH. e The calculated H₂O₂ selectivity as a function of the applied potential. f Stability test of Co HSACs catalyst under 0.5 V bias vs. RHE in O₂-saturated 0.1 M KOH, rotation speed 500 rpm. Source data are provided as a Source Data file.