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. 2020 Aug 6;11:3928. doi: 10.1038/s41467-020-17584-9

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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 Disk and ring current stability of PtP₂ and Al₂O₃/PtP₂-600 measured at a constant potential of 0.4 V vs. RHE for 60 h. b Depiction of Al₂O₃ coating by ALD and subsequent activation. TEM images for c, d Al₂O₃/PtP₂ and e, f Al₂O₃/PtP₂-600; scale bar, c, e 20 nm; d, f 3 nm. g–j HAADF-STEM image and corresponding elemental mapping for Al₂O₃/PtP₂-600; scale bar, 10 nm. k Electrochemical CO stripping tests and l Pt L₃-edge XANES spectra of as-prepared samples before and after ORR.