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. 2019 Nov 7;10:5074. doi: 10.1038/s41467-019-13052-1

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© The Author(s) 2019

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. 7 — Proton inventory and atom proton transfer studies. LSV curves of a NiFeCP/NF and b NiFe LDH/NF in mixed solutions of 1.0 M NaOH in H₂O and 1.0 M NaOD in D₂O with different ratios as a function of atom fractions of deuterium (n). The insets exhibit the plots of j_n/j₀ as a function of n, where n = [D]/([D] + [H]) and at a certain potential were abbreviated as j_n, j₀ = j_H2O (all reported values are averages from 12 different potentials, which can be find in Supplementary Note 3, all errors are given as standard deviations). LSV curves of: c NiFeCP/NF and d NiFe LDH/NF as a function concentration of K₃PO₄ at pH = 12.65, the insets exhibit the reaction order of [K₃PO₄]