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. 2020 Mar 16;11:1409. doi: 10.1038/s41467-020-15141-y

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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. 1 — a, b Free energy profiles of CO₂RR and HER on MN₄ units of PcM-O₈-M1 at U = 0.0 V, respectively. Inset in (a): atomistic structure of PcM-O₈-M1. The dashed circle indicates the catalytic active area with MN₄ units. c, d Free energy profiles of CO₂RR and HER on M1O₄ units in the PcM-O₈-M1 at U = 0.0 V, respectively. Inset in (c): atomistic structure of PcM-O₈-M1. The dashed circle indicates the catalytic active area with M1O₄ units.