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. 2020 Feb 28;11:1116. doi: 10.1038/s41467-020-14980-z

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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 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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Fig. 4 — a Schematic illustration of OH functionality in promoting HER on the di-anionic MoS_2−x(OH)_y electrode through forming strong non-covalent hydrogen bonding to the reactants (hydronium ions or water). b Left: HER mechanism of Pd, Ru–MoS_2−xOH_y in acidic media; Right: HER mechanism of Pd, Ru–MoS_2−xOH_y in alkaline media.