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. 2020 Dec 4;14(1):10–32. doi: 10.1002/cssc.202002002

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© 2020 The Authors. ChemSusChem published by Wiley-VCH GmbH

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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(a, b) Alkaline (1.0 m KOH) a) OER and b) HER LSV polarization curves of bimetallic CoNi, CoNi oxyhydroxide, and benchmark IrO₂/C and Pt/C electrodes, respectively, recorded at a scan rate of 5 mVs⁻¹. Reproduced from Ref. [96] with permission from Elsevier, Copyright 2019. (c) HRSEM image of oxygen vacant FeCoOOH nanosheets grown on nickel foam (NF). Reproduced from Ref. [97] with permission from WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim, Copyright 2018. (d) TEM image of La_0.8Sr_0.2CoO_3‐δ−4 (LSC‐4) showing grey shaded regions corresponding to the presence of a hydrous oxide secondary active phase with oxygen vacancies. Reproduced from Ref. [98] with permission from Elsevier, Copyright 2017.