Ce-induced regulation of electron density enhanced the catalytic activity of Co-Mn oxides for water oxidation

Abstract

The incorporation of Ce into Co-Mn oxides induced the charge redistribution of Co and Mn via electronic coupling, which facilitated the Co³⁺/Co⁴⁺ transition. Thus, the overpotential at 10 mA cm⁻² was reduced significantly by 73 mV for the oxygen evolution reaction after Ce doping.