Surface Activation of Electrocatalysis at Oxide Electrodes. Concerted Electron?Proton Transfer

摘要

Dramatic rate enhancements are observed for the oxidation of phenols, including tyrosine, at indium?tin oxide electrodes modified by the addition of the electron-transfer relays [M~(II)(bpy)2(4, 4′-(HO)2P(O)CH2)2bpy)]2+ (M = Ru, Os) with clear evidence for the importance of proton-coupled electron transfer and concerted electron?proton transfer.