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. 2022 Feb 16;12:2604. doi: 10.1038/s41598-022-06608-7

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© The Author(s) 2022

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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Comparative free energy diagrams for the evolution of O₂ on Au₂-Ag₂ cluster (a) placed on two bridging oxygen atoms, (b) embedded in the place of oxygen vacancy on bridging row³⁴. The blue profile shows the energy for Ti active site, Green and red color shows energy profiles for Ag and Au active sites, respectively. The overpotential is shown in the upper left corner. R.D.S rate-determining step.