Abstract
12CaO•7Al2O3 (C12A7) electride, which exhibits metallic conduction and 2.4eV work function, can be used as an electron emitter and chemical reagent. Herein we reveal a new application for C12A7 electride as electrode in electrochemical reactions. Cathodic reduction of oxygen at C12A7 electrode in acetonitrile generates superoxide ions (O2•−) using Bu4NClO4 as a supporting electrolyte. Iodometry reveals that this electrode shows a higher yield of O2•− ions than conventional electrodes such as Pt and glassy carbon. Moreover, O2•– ion–induced hydroxylation of p-(methylthio)phenylboronic acid using C12A7 electrode gives the corresponding phenol derivative with a yield of 90% at the charge apply of 2.5F·mol−1.
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