The rate-determining step of the oxygen evolution reaction on hematite electrodes was switched from the sequential electron/proton transfer process to the concerted proton-coupled electron transfer (CPET) process by adding pyridine derivatives to the electrolyte. By inducing the CPET process, the overpotential for oxygen evolution at neutral pH decreased by approximately 250 mV.
T. Takashima, K. Ishikawa and H. Irie, Chem. Commun., 2016, 52, 14015 DOI: 10.1039/C6CC08379J
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