Accelerative oxygen evolution by Cu-doping into Fe-Co oxides
Development of cost-efficient, high-performance and robust earth-abundant electrocatalysts for oxygen evolution reaction (OER) is a continuous challenge. Herein, we develop a facile sol-gel strategy to fabricate a ternary Fe-Co-Cu oxide for efficient electrocatalysis of water oxidation. Low overpotential of 256, 271, and 226 mV at 10 mA cm-2 can be achieved over the FeCoCuOx supported on GCE, Pt electrode, and Ni foam, respectively, in alkaline electrolyte. Due to the enhanced the charge transfer ability and electrochemically active surface area, trimetallic FeCoCuOx is more active than binary FeCoOx and among the most active OER catalysts to date.