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. 2024 Nov 1;15:9462. doi: 10.1038/s41467-024-53724-1

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, 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 you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. 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-nc-nd/4.0/.

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Fig. 3 — a, d Chronopotentiometry curves of commercial Pt/C (a) and Mo₂N (d) catalysts operated at different current density in natural seawater. b, e Photographs of Pt/C (b) and Mo₂N (e) catalysts on the carbon paper after electrolysis at different current densities for 36 hours in natural seawater. c, f XRD patterns of Pt/C (c) and Mo₂N (f) catalysts on the carbon paper after electrolysis at different current densities for 36 hours in natural seawater. g Local pH on the surface of Pt/C and Mo₂N catalysts as a function of current density in natural seawater. Error bars are based on the standard deviation of three independent measurements. h Schematic of the NH₄⁺ formation on the Mo₂N surface that prevents precipitate formation, whereas Mg(OH)₂ precipitate formed on the surface of Pt/C catalyst.