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. Author manuscript; available in PMC: 2019 Nov 28.
Published in final edited form as: Chem Rev. 2018 Oct 29;118(22):10840–11022. doi: 10.1021/acs.chemrev.8b00074

Figure 1.

Figure 1.

(Top) Stepwise reduction of dioxygen. Reduction potentials are given in volts vs NHE at 25 °C, 1 bar, pH = 7. (Bottom) Frost diagrams depicting the free energy (nE) of the ROS intermediates during stepwise O2 reduction to water at (a) pH = 0 and (b) pH = 7. Adapted from ref 1. Copyright 2010 American Chemical Society.