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. 2021 Jun 7;12:3375. doi: 10.1038/s41467-021-23737-1

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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 Schematic illustration of electron transfer in the electrocatalytic oxidation of alcohols and the oxygen reduction reaction. b Cyclic voltammograms of Au NPs in N₂- and O₂- saturated 0.1 M NaOH solutions (with or without glucose). c RRDE measurements of the selective oxygen reduction of the catalysts in 0.1 M O₂-saturated NaOH electrolyte. d Mechanism of glucose oxidation catalyzed by GOD. e Mechanism of glucose oxidation catalyzed by noble metal NPs.