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. 2018 Nov 7;10(4):75. doi: 10.1007/s40820-018-0229-x

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 5 — a Free energies of H₂O adsorption, H adsorption, and H₂ evolution on α- or β-Ni(OH)₂/Pt electrode; for clarity, the adsorbed H atoms for the H₂O molecules in the top site on the Pt surfaces are colored green. b Adsorption free energy diagram for the Volmer and Heyrovsky steps. c LDOS of the α- or β-Ni(OH)₂/Pt electrode. Reproduced with permission of the authors of Ref. [53]. Copyright 2018, American Chemical Society. (Color figure online)