Fig. 2 OER performance of ACoO3 (A = Ca, Sr), RuO2, LaCoO3, and Co3O4.

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Fig. 2 OER performance of ACoO3 (A = Ca, Sr), RuO2, LaCoO3, and Co3O4. OER performance of ACoO3 (A = Ca, Sr), RuO2, LaCoO3, and Co3O4. (A) Linear sweep voltammograms at 1600 rpm in 0.1 M KOH. (B) Overpotential required at 10 mA cm−2. (C) Tafel slopes. (D) Chronoamperometric curves in an O2-saturated 0.1 M KOH electrolyte at 1.6 V versus RHE. Xiang Li et al. Sci Adv 2019;5:eaav6262 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).